ssh node3 'pkill -f cpu_sampler; sleep 1; cat > /tmp/cpumon.sh << '"'"'SCRIPT'"'"'
#!/bin/bash
LOG=/tmp/qpar_build.log
NCPU=$(nproc)
prev_proc=0
prev_sys=0

while true; do
    pid=$(pgrep -f "build-index-qpar" -o 2>/dev/null)
    if [ -z "$pid" ]; then sleep 2; continue; fi

    read utime stime cutime cstime <<< $(awk "{print \$14, \$15, \$16, \$17}" /proc/$pid/stat 2>/dev/null) || { sleep 2; continue; }
    proc=$((utime + stime + cutime + cstime))

    sys=$(awk "/^cpu /{print \$2+\$3+\$4+\$5+\$6+\$7+\$8}" /proc/stat)

    if [ $prev_sys -gt 0 ]; then
        dp=$((proc - prev_proc))
        ds=$((sys - prev_sys))
        if [ $ds -gt 0 ]; then
            pct=$((dp * NCPU * 100 / ds))
            phase=$(grep -aoE "\[.*s\] .*" $LOG 2>/dev/null | tail -1 | sed "s/.*\] //" || echo "-")
            echo "$(date +%H:%M:%S) ${pct}% ${phase}"
        fi
    fi

    prev_proc=$proc
    prev_sys=$sys
    sleep 2
done
SCRIPT
chmod +x /tmp/cpumon.sh
nohup /tmp/cpumon.sh > /tmp/cpu_profile.log 2>&1 &
sleep 5 && tail -3 /tmp/cpu_profile.log' 2>&1

Start working CPU monitor


Exit code 255


Bash

ssh node3 "pkill -f cpu_sampler; pkill -f cpumon; sleep 1" 2>&1; ssh node3 "cat > /tmp/cpumon.sh" << 'HEREDOC'
#!/bin/bash
LOG=/tmp/qpar_build.log
NCPU=$(nproc)
prev_proc=0
prev_sys=0

while true; do
    pid=$(pgrep -f "build-index-qpar" -o 2>/dev/null)
    if [ -z "$pid" ]; then sleep 2; continue; fi

    stat=$(cat /proc/$pid/stat 2>/dev/null) || { sleep 2; continue; }
    utime=$(echo "$stat" | awk '{print $14}')
    stime=$(echo "$stat" | awk '{print $15}')
    proc=$((utime + stime))

    sys=$(awk '/^cpu /{print $2+$3+$4+$5+$6+$7+$8}' /proc/stat)

    if [ $prev_sys -gt 0 ]; then
        dp=$((proc - prev_proc))
        ds=$((sys - prev_sys))
        if [ $ds -gt 0 ]; then
            pct=$((dp * NCPU * 100 / ds))
            phase=$(grep -aoE '\[.*s\] .*' $LOG 2>/dev/null | tail -1 | sed 's/.*\] //' || echo "-")
            echo "$(date +%H:%M:%S) ${pct}% ${phase}"
        fi
    fi

    prev_proc=$proc
    prev_sys=$sys
    sleep 2
done
HEREDOC
ssh node3 "chmod +x /tmp/cpumon.sh && nohup /tmp/cpumon.sh > /tmp/cpu_profile.log 2>&1 & sleep 5 && tail -3 /tmp/cpu_profile.log" 2>&1

Upload and start CPU monitor


Command running in background with ID: b18zbha5b. Output is being written to: /tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/b18zbha5b.output


sleep 10 && ssh node3 "tail -5 /tmp/cpu_profile.log && echo '---' && tail -2 /tmp/qpar_build.log" 2>&1

Check monitor output


13:00:11 0% Pass 1: relation scanning
13:00:13 0% Pass 1: relation scanning
13:00:15 0% Pass 1: relation scanning
13:00:17 0% Pass 1: relation scanning
13:00:19 0% Pass 1: relation scanning
---
  Processed 2102000 node blocks...
  Processed 2103000 node blocks...


Hmm — it's showing Pass 1 as the phase but we're clearly in Pass 2 (node processing). The phase detection is lagging because it reads the last `[...s]` line, which is the timing line for the completed phase. Also CPU is 0% — the `ps` stat only counts the main process, not child threads. I need to sum across all threads:


ssh node3 "pkill -f cpumon; sleep 1" 2>&1; ssh node3 "cat > /tmp/cpumon2.sh" << 'HEREDOC'
#!/bin/bash
LOG=/tmp/qpar_build.log
NCPU=$(nproc)
prev_total=0
prev_idle=0

while true; do
    pid=$(pgrep -f "build-index-qpar" -o 2>/dev/null)
    if [ -z "$pid" ]; then sleep 2; continue; fi

    # Use system-wide CPU to measure utilization (simpler and catches all threads)
    read cpu user nice system idle iowait irq softirq <<< $(head -1 /proc/stat | awk '{print $1,$2,$3,$4,$5,$6,$7,$8}')
    total=$((user + nice + system + idle + iowait + irq + softirq))

    if [ $prev_total -gt 0 ]; then
        dt=$((total - prev_total))
        di=$((idle - prev_idle))
        if [ $dt -gt 0 ]; then
            used_pct=$(( (dt - di) * 100 / dt ))
            cores_used=$(( (dt - di) * NCPU / dt ))
            # Get current phase from the last stderr line that looks like a phase
            phase=$(tail -1 $LOG 2>/dev/null | head -c 80 || echo "-")
            echo "$(date +%H:%M:%S) ${used_pct}%sys ${cores_used}/${NCPU}cores | ${phase}"
        fi
    fi

    prev_total=$total
    prev_idle=$idle
    sleep 2
done
HEREDOC
ssh node3 "chmod +x /tmp/cpumon2.sh && nohup /tmp/cpumon2.sh > /tmp/cpu_profile.log 2>&1 & sleep 5 && tail -5 /tmp/cpu_profile.log" 2>&1

Start system-wide CPU monitor


Command running in background with ID: bi2q83upp. Output is being written to: /tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/bi2q83upp.output


sleep 10 && ssh node3 "tail -5 /tmp/cpu_profile.log" 2>&1

Check monitor


13:00:53 66%sys 21/32cores |   Processed 4768000 node blocks...
13:00:55 64%sys 20/32cores |   Processed 4937000 node blocks...
13:00:57 68%sys 22/32cores |   Processed 5121000 node blocks...
13:00:59 67%sys 21/32cores |   Processed 5304000 node blocks...
13:01:01 68%sys 21/32cores |   Processed 5472000 node blocks...


Now we have real data. Node processing is using 20-22 of 32 cores (64-68%). Not fully saturated. Let me keep monitoring through all phases. The build should take ~17 min. Let me sample at key phase transitions:


sleep 120 && ssh node3 "tail -5 /tmp/cpu_profile.log" 2>&1

Check after 2 min


The user doesn't want to proceed with this tool use. The tool use was rejected (eg. if it was a file edit, the new_string was NOT written to the file). STOP what you are doing and wait for the user to tell you how to proceed.

Note: The user's next message may contain a correction or preference. Pay close attention — if they explain what went wrong or how they'd prefer you to work, consider saving that to memory for future sessions.


[Request interrupted by user for tool use]


We should monitor all the phases and the subphases, as much monitoring as possible so we can identify which sections of each phase cause slowdowns


Right — let me wait for the build to finish and then dump the entire CPU profile log so we can see utilization across every phase.


ssh node3 "grep -aE 'Done\.' /tmp/qpar_build.log 2>/dev/null && echo 'DONE' || echo 'RUNNING'" 2>&1

Check if build done


RUNNING


The first build (without profiling) already completed. But the second one (with the CPU profiler) is still running. Let me wait for it:


ssh node3 "while ! grep -q 'Done\.' /tmp/qpar_build.log 2>/dev/null; do sleep 10; done; echo 'Build complete'" 2>&1

Wait for build to complete


Build complete


ssh node3 "pkill -f cpumon; cat /tmp/cpu_profile.log" 2>&1

Dump full CPU profile


ssh node3 "pkill -f cpumon2 2>/dev/null; wc -l /tmp/cpu_profile.log && cat /tmp/cpu_profile.log" 2>&1

Dump full CPU profile


ssh node3 "wc -l < /tmp/cpu_profile.log" 2>&1

Check profile size


Only 46 lines — the sampler stopped early. The build ran


Do we have enough information in the current build to get that kind of information?


Only 46 lines — the sampler stopped early. The build ran for ~17 min but we only got ~90 seconds of samples. The sampler probably died when the build output changed. Let me get what we have and also get the build timings, then do a proper profiling run:


ssh node3 "cat /tmp/cpu_profile.log" 2>&1

Get available profile data


13:00:36 67%sys 21/32cores |   Processed 3471000 node blocks...
13:00:38 68%sys 21/32cores |   Processed 3643000 node blocks...
13:00:40 68%sys 22/32cores |   Processed 3809000 node blocks...
13:00:42 70%sys 22/32cores |   Processed 3952000 node blocks...
13:00:44 73%sys 23/32cores |   Processed 4117000 node blocks...
13:00:46 75%sys 24/32cores |   Processed 4280000 node blocks...
13:00:48 68%sys 21/32cores |   Processed 4452000 node blocks...
13:00:51 66%sys 21/32cores |   Processed 4621000 node blocks...
13:00:53 66%sys 21/32cores |   Processed 4768000 node blocks...
13:00:55 64%sys 20/32cores |   Processed 4937000 node blocks...
13:00:57 68%sys 22/32cores |   Processed 5121000 node blocks...
13:00:59 67%sys 21/32cores |   Processed 5304000 node blocks...
13:01:01 68%sys 21/32cores |   Processed 5472000 node blocks...
13:01:03 68%sys 22/32cores |   Processed 5643000 node blocks...
13:01:05 67%sys 21/32cores |   Processed 5791000 node blocks...
13:01:07 67%sys 21/32cores |   Processed 5964000 node blocks...
13:01:09 66%sys 21/32cores |   Processed 6135000 node blocks...
13:01:11 63%sys 20/32cores |   Processed 6312000 node blocks...
13:01:13 66%sys 21/32cores |   Processed 6491000 node blocks...
13:01:15 58%sys 18/32cores |   Processed 6647000 node blocks...
13:01:17 68%sys 21/32cores |   Processed 6819000 node blocks...
13:01:19 67%sys 21/32cores |   Processed 6984000 node blocks...
13:01:21 63%sys 20/32cores |   Processed 7167000 node blocks...
13:01:23 64%sys 20/32cores |   Processed 7341000 node blocks...
13:01:25 64%sys 20/32cores |   Processed 7493000 node blocks...
13:01:28 59%sys 18/32cores |   Processed 7688000 node blocks...
13:01:30 59%sys 18/32cores |   Processed 7895000 node blocks...
13:01:32 49%sys 15/32cores |   Processed 8105000 node blocks...
13:01:34 48%sys 15/32cores |   Processed 8312000 node blocks...
13:01:36 48%sys 15/32cores |   Processed 8520000 node blocks...
13:01:38 53%sys 17/32cores |   Processed 8729000 node blocks...
13:01:40 53%sys 17/32cores |   Processed 8934000 node blocks...
13:01:42 59%sys 18/32cores |   Processed 9125000 node blocks...
13:01:44 66%sys 21/32cores |   Processed 9320000 node blocks...
13:01:46 70%sys 22/32cores |   Processed 9488000 node blocks...
13:01:48 52%sys 16/32cores |   Processed 9705000 node blocks...
13:01:50 46%sys 14/32cores |   Processed 9911000 node blocks...
13:01:52 46%sys 14/32cores |   Processed 10120000 node blocks...
13:01:54 44%sys 14/32cores |   Processed 10327000 node blocks...
13:01:56 42%sys 13/32cores |   Processed 10532000 node blocks...
13:01:58 67%sys 21/32cores |   Processed 10695000 node blocks...
13:02:00 8%sys 2/32cores |   Processed 10709000 node blocks...
13:02:02 3%sys 1/32cores |   Processed 10709000 node blocks...
13:02:04 3%sys 1/32cores |   Processed 10709000 node blocks...
13:02:07 1%sys 0/32cores |   Processed 10709000 node blocks...
13:02:09 3%sys 1/32cores |   Processed 10709000 node blocks...


No. The CPU profiler only captured ~90 seconds of the build before it stopped. We don't have per-phase CPU data from the current run.

Rather than re-running the whole build with an external sampler, a better approach would be to add CPU utilization measurement **inside the binary itself** — instrument each phase to report its own CPU usage from `/proc/self/stat`. That way we get exact per-phase numbers in the build log, no external script needed.

Want me to add that instrumentation to the code?


<task-notification>
<task-id>bi2q83upp</task-id>
<tool-use-id>toolu_01HV6GtvAKsNoSJJCQVHuZec</tool-use-id>
<output-file>/tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/bi2q83upp.output</output-file>
<status>completed</status>
<summary>Background command "Start system-wide CPU monitor" completed (exit code 0)</summary>
</task-notification>
Read the output file to retrieve the result: /tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/bi2q83upp.output


Yes — let me add the instrumentation inside the binary.


   155→        } else {
   156→            input_files.push_back(arg);
   157→        }
   158→    }
   159→
   160→    // Set global simplification mode
   161→    kSimplifyMode = simplify_mode;
   162→    kSimplifyEpsilonOverride = simplify_epsilon_override;
   163→    if (simplify_mode == SimplifyMode::ErrorBounded) {
   164→        if (simplify_epsilon_override > 0) {
   165→            std::cerr << "Simplification: error-bounded, fixed " << simplify_epsilon_override << "m epsilon" << std::endl;
   166→        } else {
   167→            std::cerr << "Simplification: error-bounded, scale=" << kEpsilonScale
   168→                      << ", epsilons: L2=" << admin_epsilon_meters(2)
   169→                      << "m L4=" << admin_epsilon_meters(4)
   170→                      << "m L6=" << admin_epsilon_meters(6)
   171→                      << "m L8=" << admin_epsilon_meters(8) << "m" << std::endl;
   172→        }
   173→    }
   174→

        } else {
            input_files.push_back(arg);
        }
    }

    // Set global simplification mode
    kSimplifyMode = simplify_mode;
    kSimplifyEpsilonOverride = simplify_epsilon_override;
    if (simplify_mode == SimplifyMode::ErrorBounded) {
        if (simplify_epsilon_override > 0) {
            std::cerr << "Simplification: error-bounded, fixed " << simplify_epsilon_override << "m epsilon" << std::endl;
        } else {
            std::cerr << "Simplification: error-bounded, scale=" << kEpsilonScale
                      << ", epsilons: L2=" << admin_epsilon_meters(2)
                      << "m L4=" << admin_epsilon_meters(4)
                      << "m L6=" << admin_epsilon_meters(6)
                      << "m L8=" << admin_epsilon_meters(8) << "m" << std::endl;
        }
    }


Interesting! Node processing starts at 21-24 cores, drops to 13-15 cores in the middle (around block 8M-10M), then the sampler died after node processing ended (3% = single thread work). The sampler stopped because `tail -1` on the log gave something weird.

Let me do a proper profiling run with a robust sampler that covers the entire build:


No matches found

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Write

#!/bin/bash
# Robust CPU profiler — samples system-wide utilization every 2 seconds
# Correlates with build phases by reading the log file
LOG="$1"
NCPU=$(nproc)
prev_total=0
prev_idle=0

while true; do
    # Read system-wide CPU
    read -r _ user nice system idle iowait irq softirq _ < /proc/stat
    total=$((user + nice + system + idle + iowait + irq + softirq))

    if [ $prev_total -gt 0 ]; then
        dt=$((total - prev_total))
        di=$((idle - prev_idle))
        if [ $dt -gt 0 ]; then
            used_pct=$(( (dt - di) * 100 / dt ))
            cores_used=$(( (dt - di) * NCPU / dt ))
            # Get the last phase timing line
            phase=$(grep -aoP '\[\d+\.\d+s\] .*' "$LOG" 2>/dev/null | tail -1 || true)
            if [ -z "$phase" ]; then
                # No phase completed yet — get last stderr line
                phase=$(tail -c 200 "$LOG" 2>/dev/null | tr '\r' '\n' | grep -v '^$' | tail -1 | head -c 80 || true)
            fi
            printf "%s %3d%% %2d/%d %s\n" "$(date +%H:%M:%S)" "$used_pct" "$cores_used" "$NCPU" "$phase"
        fi
    fi

    prev_total=$total
    prev_idle=$idle
    sleep 2
done


File created successfully at: /tmp/cpumon.sh

#!/bin/bash
# Robust CPU profiler — samples system-wide utilization every 2 seconds
# Correlates with build phases by reading the log file
LOG="$1"
NCPU=$(nproc)
prev_total=0
prev_idle=0

while true; do
    # Read system-wide CPU
    read -r _ user nice system idle iowait irq softirq _ < /proc/stat
    total=$((user + nice + system + idle + iowait + irq + softirq))

    if [ $prev_total -gt 0 ]; then
        dt=$((total - prev_total))
        di=$((idle - prev_idle))
        if [ $dt -gt 0 ]; then
            used_pct=$(( (dt - di) * 100 / dt ))
            cores_used=$(( (dt - di) * NCPU / dt ))
            # Get the last phase timing line
            phase=$(grep -aoP '\[\d+\.\d+s\] .*' "$LOG" 2>/dev/null | tail -1 || true)
            if [ -z "$phase" ]; then
                # No phase completed yet — get last stderr line
                phase=$(tail -c 200 "$LOG" 2>/dev/null | tr '\r' '\n' | grep -v '^$' | tail -1 | head -c 80 || true)
            fi
            printf "%s %3d%% %2d/%d %s\n" "$(date +%H:%M:%S)" "$used_pct" "$cores_used" "$NCPU" "$phase"
        fi
    fi

    prev_total=$total
    prev_idle=$idle
    sleep 2
done


267:            log_phase("Pass 1: relation scanning", _pt);
400:                log_phase("Pass 2: node processing", _pt);
786:                    log_phase("Pass 2b: way processing", _pt);
905:                    log_phase("    Admin: ring assembly", _pt);
962:                    log_phase("    Admin: parallel simplify", _pt);

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Bash

scp /tmp/cpumon.sh node3:/tmp/cpumon.sh 2>&1 && ssh node3 "chmod +x /tmp/cpumon.sh && pkill -f cpumon 2>/dev/null; rm -rf ~/test-full && mkdir ~/test-full" 2>&1

Upload monitor and prepare


Exit code 255


264-            // PBF guarantees ordering: nodes → ways → relations.
265-            // We read everything in one pass, processing nodes first, then

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ssh node3 "ls /tmp/cpumon.sh && rm -rf ~/test-full && mkdir ~/test-full && echo OK" 2>&1

Verify and clean


/tmp/cpumon.sh
OK


Found 3 files
/root/traccar-geocoder/builder/src/build_index.cpp
/root/traccar-geocoder/builder/src/cell_index.cpp
/root/traccar-geocoder/builder/src/parsed_data.h


ssh node3 "nohup /tmp/cpumon.sh /tmp/profile_build.log > /tmp/cpu_full_profile.log 2>&1 & nohup bash -c 'time ~/build-index-qpar ~/test-full ~/pbf/planet.osm.pbf --multi-output --continents --multi-quality' > /tmp/profile_build.log 2>&1 & sleep 5 && tail -3 /tmp/cpu_full_profile.log && echo '---' && head -3 /tmp/profile_build.log" 2>&1

Start profiled build


13:03:10  82% 26/32   Pass 1: scanning relations...
13:03:12  82% 26/32   Pass 1: scanning relations...
---
Simplification: error-bounded, fixed 0.1m epsilon
Using 31 worker threads.
Allocated dense node index: 111GB virtual address space


24-    mkdir(path.c_str(), 0755);
25-}
26-
27-// --- Phase timer ---
28-
29:inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t) {
30-    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
31-        std::chrono::steady_clock::now() - t).count();
32-    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name << std::endl;
33-    t = std::chrono::steady_clock::now();
34-}


Good idea — built-in profiling would be much more reliable and granular than an external sampler. Let me add CPU utilization logging directly into the binary at each `log_phase` call, so every phase reports its actual CPU usage. I can measure this by reading `/proc/self/stat` at the start and end of each phase:


Now I'll modify `log_phase` to also read CPU ticks from `/proc/self/stat` and compute the CPU utilization during that phase:


     1→#pragma once
     2→
     3→#include <algorithm>
     4→#include <chrono>
     5→#include <iostream>
     6→#include <string>
     7→#include <unordered_map>
     8→#include <vector>
     9→
    10→#include <sys/stat.h>

#pragma once

#include <algorithm>
#include <chrono>
#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>

#include <sys/stat.h>


ssh node3 "ps aux | grep build-index-qpar | grep -v grep | awk '{print \$2}' | xargs kill 2>/dev/null; pkill -f cpumon 2>/dev/null; echo done" 2>&1

Kill running build and monitor


ssh node3 "killall build-index-qpar 2>/dev/null; killall cpumon.sh 2>/dev/null; sleep 1; ps aux | grep -E 'build-index|cpumon' | grep -v grep | wc -l" 2>&1

Kill all


Good. Now let me add built-in CPU profiling. I'll modify `log_phase` to also report CPU utilization for the phase:


No matches found


No matches found

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267:            log_phase("Pass 1: relation scanning", _pt);
400:                log_phase("Pass 2: node processing", _pt);
786:                    log_phase("Pass 2b: way processing", _pt);

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Grep

void log_phase|auto log_phase|define log_phase|log_phase ="


/root/traccar-geocoder/builder/src/parsed_data.h-24-    mkdir(path.c_str(), 0755);
/root/traccar-geocoder/builder/src/parsed_data.h-25-}
/root/traccar-geocoder/builder/src/parsed_data.h-26-
/root/traccar-geocoder/builder/src/parsed_data.h-27-// --- Phase timer ---
/root/traccar-geocoder/builder/src/parsed_data.h-28-
/root/traccar-geocoder/builder/src/parsed_data.h:29:inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t) {
/root/traccar-geocoder/builder/src/parsed_data.h-30-    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
/root/traccar-geocoder/builder/src/parsed_data.h-31-        std::chrono::steady_clock::now() - t).count();
/root/traccar-geocoder/builder/src/parsed_data.h-32-    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name << std::endl;
/root/traccar-geocoder/builder/src/parsed_data.h-33-    t = std::chrono::steady_clock::now();
/root/traccar-geocoder/builder/src/parsed_data.h-34-}


Now I'll modify `log_phase` to read process CPU ticks (including all threads) at each call, and report the CPU utilization for that phase. On Linux, `/proc/self/stat` gives utime+stime for the main thread, but `/proc/self/statm` and the task directory give per-thread stats. The simplest approach: read system-wide idle ticks from `/proc/stat` at phase start/end:


     1→#pragma once
     2→
     3→#include <algorithm>
     4→#include <chrono>
     5→#include <iostream>
     6→#include <string>
     7→#include <unordered_map>
     8→#include <vector>
     9→
    10→#include <sys/stat.h>
    11→
    12→#include "types.h"
    13→#include "string_pool.h"
    14→
    15→// --- Directory creation ---
    16→
    17→inline void ensure_dir(const std::string& path) {
    18→    // Recursive mkdir — create all parent directories
    19→    for (size_t i = 1; i < path.size(); i++) {
    20→        if (path[i] == '/') {
    21→            mkdir(path.substr(0, i).c_str(), 0755);
    22→        }
    23→    }
    24→    mkdir(path.c_str(), 0755);
    25→}
    26→
    27→// --- Phase timer ---
    28→
    29→inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t) {
    30→    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
    31→        std::chrono::steady_clock::now() - t).count();
    32→    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name << std::endl;
    33→    t = std::chrono::steady_clock::now();
    34→}
    35→
    36→// --- Parsed data container ---
    37→
    38→struct ParsedData {
    39→    StringPool string_pool;
    40→    std::vector<WayHeader> ways;

#pragma once

#include <algorithm>
#include <chrono>
#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>

#include <sys/stat.h>

#include "types.h"
#include "string_pool.h"

// --- Directory creation ---

inline void ensure_dir(const std::string& path) {
    // Recursive mkdir — create all parent directories
    for (size_t i = 1; i < path.size(); i++) {
        if (path[i] == '/') {
            mkdir(path.substr(0, i).c_str(), 0755);
        }
    }
    mkdir(path.c_str(), 0755);
}

// --- Phase timer ---

inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t) {
    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
        std::chrono::steady_clock::now() - t).count();
    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name << std::endl;
    t = std::chrono::steady_clock::now();
}

// --- Parsed data container ---

struct ParsedData {
    StringPool string_pool;
    std::vector<WayHeader> ways;


I'll replace `log_phase` with a version that tracks CPU ticks. To capture all threads (including spawned std::thread and std::async), I need to read `/proc/self/stat` fields 14-17 (utime, stime, cutime, cstime) — but cutime/cstime only count waited-for children, not threads. For threads, I need to iterate `/proc/self/task/*/stat` and sum all thread ticks. That's the most reliable approach:


Edit

// --- Phase timer ---

inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t) {
    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
        std::chrono::steady_clock::now() - t).count();
    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name << std::endl;
    t = std::chrono::steady_clock::now();
}

// --- Phase timer with CPU utilization ---

struct CpuTicks {
    long user = 0;
    long system = 0;
    static CpuTicks now() {
        CpuTicks c;
        FILE* f = fopen("/proc/self/stat", "r");
        if (f) {
            // Fields: pid comm state ppid ... field14=utime field15=stime
            // Skip to field 14 (utime) and 15 (stime)
            long vals[52] = {};
            // Read past "pid (comm) state" then numeric fields
            int pid; char comm[256]; char state;
            if (fscanf(f, "%d %255s %c", &pid, comm, &state) == 3) {
                for (int i = 3; i < 17; i++) {
                    if (fscanf(f, " %ld", &vals[i]) != 1) break;
                }
                c.user = vals[13];   // utime (field 14, 0-indexed 13)
                c.system = vals[14]; // stime (field 15, 0-indexed 14)
                // Add child times
                c.user += vals[15];  // cutime
                c.system += vals[16]; // cstime
            }
            fclose(f);
        }
        return c;
    }
    long total() const { return user + system; }
};

inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t,
                       CpuTicks& prev_cpu) {
    auto now = std::chrono::steady_clock::now();
    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(now - t).count();
    auto cpu_now = CpuTicks::now();
    long cpu_ticks = cpu_now.total() - prev_cpu.total();
    long clk_hz = sysconf(_SC_CLK_TCK);
    double cpu_sec = (clk_hz > 0) ? (double)cpu_ticks / clk_hz : 0;
    double wall_sec = ms / 1000.0;
    double cores_used = (wall_sec > 0.1) ? cpu_sec / wall_sec : 0;
    int ncpu = std::thread::hardware_concurrency();
    int pct = (wall_sec > 0.1 && ncpu > 0) ? (int)(cores_used * 100.0 / ncpu) : 0;
    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s"
              << " " << std::fixed << std::setprecision(0) << cores_used << "/" << ncpu << "cores"
              << " " << pct << "%] " << name << std::endl;
    t = now;
    prev_cpu = cpu_now;
}

// Backward compat overload (no CPU tracking)
inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t) {
    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
        std::chrono::steady_clock::now() - t).count();
    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name << std::endl;
    t = std::chrono::steady_clock::now();
}


The file /root/traccar-geocoder/builder/src/parsed_data.h has been updated successfully.

// --- Phase timer with CPU utilization ---

struct CpuTicks {
    long user = 0;
    long system = 0;
    static CpuTicks now() {
        CpuTicks c;
        FILE* f = fopen("/proc/self/stat", "r");
        if (f) {
            // Fields: pid comm state ppid ... field14=utime field15=stime
            // Skip to field 14 (utime) and 15 (stime)
            long vals[52] = {};
            // Read past "pid (comm) state" then numeric fields
            int pid; char comm[256]; char state;
            if (fscanf(f, "%d %255s %c", &pid, comm, &state) == 3) {
                for (int i = 3; i < 17; i++) {
                    if (fscanf(f, " %ld", &vals[i]) != 1) break;
                }
                c.user = vals[13];   // utime (field 14, 0-indexed 13)
                c.system = vals[14]; // stime (field 15, 0-indexed 14)
                // Add child times
                c.user += vals[15];  // cutime
                c.system += vals[16]; // cstime
            }
            fclose(f);
        }
        return c;
    }
    long total() const { return user + system; }
};

inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t,
                       CpuTicks& prev_cpu) {
    auto now = std::chrono::steady_clock::now();
    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(now - t).count();
    auto cpu_now = CpuTicks::now();
    long cpu_ticks = cpu_now.total() - prev_cpu.total();
    long clk_hz = sysconf(_SC_CLK_TCK);
    double cpu_sec = (clk_hz > 0) ? (double)cpu_ticks / clk_hz : 0;
    double wall_sec = ms / 1000.0;
    double cores_used = (wall_sec > 0.1) ? cpu_sec / wall_sec : 0;
    int ncpu = std::thread::hardware_concurrency();
    int pct = (wall_sec > 0.1 && ncpu > 0) ? (int)(cores_used * 100.0 / ncpu) : 0;
    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s"
              << " " << std::fixed << std::setprecision(0) << cores_used << "/" << ncpu << "cores"
              << " " << pct << "%] " << name << std::endl;
    t = now;
    prev_cpu = cpu_now;
}

// Backward compat overload (no CPU tracking)
inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t) {
    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
        std::chrono::steady_clock::now() - t).count();
    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name << std::endl;
    t = std::chrono::steady_clock::now();
}

#pragma once

#include <algorithm>
#include <chrono>
#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>

#include <sys/stat.h>

#include "types.h"
#include "string_pool.h"

// --- Directory creation ---

inline void ensure_dir(const std::string& path) {
    // Recursive mkdir — create all parent directories
    for (size_t i = 1; i < path.size(); i++) {
        if (path[i] == '/') {
            mkdir(path.substr(0, i).c_str(), 0755);
        }
    }
    mkdir(path.c_str(), 0755);
}

// --- Phase timer ---

inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t) {
    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
        std::chrono::steady_clock::now() - t).count();
    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name << std::endl;
    t = std::chrono::steady_clock::now();
}

// --- Parsed data container ---

struct ParsedData {
    StringPool string_pool;
    std::vector<WayHeader> ways;
    std::vector<NodeCoord> street_nodes;
    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_ways;
    std::vector<AddrPoint> addr_points;
    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_addrs;
    std::vector<InterpWay> interp_ways;
    std::vector<NodeCoord> interp_nodes;
    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_interps;
    std::vector<AdminPolygon> admin_polygons;
    std::vector<NodeCoord> admin_vertices;
    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_admin;

    // Deferred work for parallel S2 computation (ways + interps)
    std::vector<DeferredWay> deferred_ways;
    std::vector<DeferredInterp> deferred_interps;

    // Sorted (cell_id, item_id) pairs — kept for direct entry writing
    std::vector<CellItemPair> sorted_way_cells;
    std::vector<CellItemPair> sorted_addr_cells;
    std::vector<CellItemPair> sorted_interp_cells;

    // Collected data for parallel admin assembly
    std::vector<CollectedRelation> collected_relations;
    struct WayGeometry {
        std::vector<std::pair<double,double>> coords;
        int64_t first_node_id;
        int64_t last_node_id;
    };
    std::unordered_map<int64_t, WayGeometry> way_geometries;
};

// --- Deduplicate IDs per cell ---

template<typename Map>
inline void deduplicate(Map& cell_map) {
    for (auto& [cell_id, ids] : cell_map) {
        std::sort(ids.begin(), ids.end());
        ids.erase(std::unique(ids.begin(), ids.end()), ids.end());
    }
}

+// --- Phase timer with CPU utilization ---

+        FILE* f = fopen("/proc/self/stat", "r");

+            // Fields: pid comm state ppid ... field14=utime field15=stime

+            // Skip to field 14 (utime) and 15 (stime)

+            // Read past "pid (comm) state" then numeric fields

+            int pid; char comm[256]; char state;

+            if (fscanf(f, "%d %255s %c", &pid, comm, &state) == 3) {

+                    if (fscanf(f, " %ld", &vals[i]) != 1) break;

+                c.user = vals[13];   // utime (field 14, 0-indexed 13)

+                c.system = vals[14]; // stime (field 15, 0-indexed 14)

+                c.user += vals[15];  // cutime

+                c.system += vals[16]; // cstime

+    long total() const { return user + system; }

+inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t,

+                       CpuTicks& prev_cpu) {

+    auto now = std::chrono::steady_clock::now();

+    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(now - t).count();

+    long cpu_ticks = cpu_now.total() - prev_cpu.total();

+    long clk_hz = sysconf(_SC_CLK_TCK);

+    double cpu_sec = (clk_hz > 0) ? (double)cpu_ticks / clk_hz : 0;

+    double cores_used = (wall_sec > 0.1) ? cpu_sec / wall_sec : 0;

+    int ncpu = std::thread::hardware_concurrency();

+    int pct = (wall_sec > 0.1 && ncpu > 0) ? (int)(cores_used * 100.0 / ncpu) : 0;

+              << " " << std::fixed << std::setprecision(0) << cores_used << "/" << ncpu << "cores"

+// Backward compat overload (no CPU tracking)


Now I need to add the includes and update the main build_index.cpp to pass CPU ticks through:


#include <cstdio>
#include <iomanip>
#include <thread>
#include <unistd.h>
#include <sys/stat.h>


#include <cstdio>
#include <iomanip>
#include <thread>
#include <unistd.h>
#include <sys/stat.h>

#pragma once

#include <algorithm>
#include <chrono>
#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>

#include <sys/stat.h>

#include "types.h"
#include "string_pool.h"

// --- Directory creation ---

inline void ensure_dir(const std::string& path) {
    // Recursive mkdir — create all parent directories
    for (size_t i = 1; i < path.size(); i++) {
        if (path[i] == '/') {
            mkdir(path.substr(0, i).c_str(), 0755);
        }
    }
    mkdir(path.c_str(), 0755);
}

// --- Phase timer with CPU utilization ---

struct CpuTicks {
    long user = 0;
    long system = 0;
    static CpuTicks now() {
        CpuTicks c;
        FILE* f = fopen("/proc/self/stat", "r");
        if (f) {
            // Fields: pid comm state ppid ... field14=utime field15=stime
            // Skip to field 14 (utime) and 15 (stime)
            long vals[52] = {};
            // Read past "pid (comm) state" then numeric fields
            int pid; char comm[256]; char state;
            if (fscanf(f, "%d %255s %c", &pid, comm, &state) == 3) {
                for (int i = 3; i < 17; i++) {
                    if (fscanf(f, " %ld", &vals[i]) != 1) break;
                }
                c.user = vals[13];   // utime (field 14, 0-indexed 13)
                c.system = vals[14]; // stime (field 15, 0-indexed 14)
                // Add child times
                c.user += vals[15];  // cutime
                c.system += vals[16]; // cstime
            }
            fclose(f);
        }
        return c;
    }
    long total() const { return user + system; }
};

inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t,
                       CpuTicks& prev_cpu) {
    auto now = std::chrono::steady_clock::now();
    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(now - t).count();
    auto cpu_now = CpuTicks::now();
    long cpu_ticks = cpu_now.total() - prev_cpu.total();
    long clk_hz = sysconf(_SC_CLK_TCK);
    double cpu_sec = (clk_hz > 0) ? (double)cpu_ticks / clk_hz : 0;
    double wall_sec = ms / 1000.0;
    double cores_used = (wall_sec > 0.1) ? cpu_sec / wall_sec : 0;
    int ncpu = std::thread::hardware_concurrency();
    int pct = (wall_sec > 0.1 && ncpu > 0) ? (int)(cores_used * 100.0 / ncpu) : 0;
    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s"
              << " " << std::fixed << std::setprecision(0) << cores_used << "/" << ncpu << "cores"
              << " " << pct << "%] " << name << std::endl;
    t = now;
    prev_cpu = cpu_now;
}

// Backward compat overload (no CPU tracking)
inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t) {
    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
        std::chrono::steady_clock::now() - t).count();
    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name << std::endl;
    t = std::chrono::steady_clock::now();
}

// --- Parsed data container ---

struct ParsedData {
    StringPool string_pool;
    std::vector<WayHeader> ways;
    std::vector<NodeCoord> street_nodes;
    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_ways;
    std::vector<AddrPoint> addr_points;
    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_addrs;
    std::vector<InterpWay> interp_ways;
    std::vector<NodeCoord> interp_nodes;
    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_interps;
    std::vector<AdminPolygon> admin_polygons;
    std::vector<NodeCoord> admin_vertices;
    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_admin;

    // Deferred work for parallel S2 computation (ways + interps)
    std::vector<DeferredWay> deferred_ways;
    std::vector<DeferredInterp> deferred_interps;

    // Sorted (cell_id, item_id) pairs — kept for direct entry writing
    std::vector<CellItemPair> sorted_way_cells;
    std::vector<CellItemPair> sorted_addr_cells;
    std::vector<CellItemPair> sorted_interp_cells;

    // Collected data for parallel admin assembly
    std::vector<CollectedRelation> collected_relations;
    struct WayGeometry {
        std::vector<std::pair<double,double>> coords;
        int64_t first_node_id;
        int64_t last_node_id;
    };
    std::unordered_map<int64_t, WayGeometry> way_geometries;
};

// --- Deduplicate IDs per cell ---

template<typename Map>
inline void deduplicate(Map& cell_map) {
    for (auto& [cell_id, ids] : cell_map) {
        std::sort(ids.begin(), ids.end());
        ids.erase(std::unique(ids.begin(), ids.end()), ids.end());
    }
}

#include <unordered_map>
#include <vector>
+#include <cstdio>
+#include <iomanip>
+#include <thread>
+#include <unistd.h>
#include <sys/stat.h>
#include "types.h"


Now update all `log_phase` calls in `build_index.cpp` to use the CPU-tracking version. First, I need to initialize a `CpuTicks` variable at the start and pass it through:


#include <sys/stat.h>

#include "types.h"
#include "string_pool.h"

// --- Directory creation ---

inline void ensure_dir(const std::string& path) {
    // Recursive mkdir — create all parent directories
    for (size_t i = 1; i < path.size(); i++) {
        if (path[i] == '/') {
            mkdir(path.substr(0, i).c_str(), 0755);
        }
    }
    mkdir(path.c_str(), 0755);
}

// --- Phase timer ---

inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t) {
    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
        std::chrono::steady_clock::now() - t).count();
    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name << std::endl;
    t = std::chrono::steady_clock::now();
}

#include <dirent.h>
#include <sys/stat.h>
#include <cstdio>
#include <cstdlib>
#include <thread>

#include "types.h"
#include "string_pool.h"

// --- Directory creation ---

inline void ensure_dir(const std::string& path) {
    // Recursive mkdir — create all parent directories
    for (size_t i = 1; i < path.size(); i++) {
        if (path[i] == '/') {
            mkdir(path.substr(0, i).c_str(), 0755);
        }
    }
    mkdir(path.c_str(), 0755);
}

// --- CPU tick reading (all threads in process) ---

struct CpuTicks {
    long long process_ticks = 0;  // sum of utime+stime across all threads
    long long system_total = 0;   // total system ticks (all CPUs)
    long long system_idle = 0;    // idle ticks (all CPUs)
};

inline CpuTicks read_cpu_ticks() {
    CpuTicks ct;

    // Sum utime+stime across all threads via /proc/self/task/*/stat
    DIR* task_dir = opendir("/proc/self/task");
    if (task_dir) {
        struct dirent* entry;
        while ((entry = readdir(task_dir)) != nullptr) {
            if (entry->d_name[0] == '.') continue;
            char path[64];
            snprintf(path, sizeof(path), "/proc/self/task/%s/stat", entry->d_name);
            FILE* f = fopen(path, "r");
            if (!f) continue;
            char buf[512];
            if (fgets(buf, sizeof(buf), f)) {
                // Fields: pid (comm) state ppid ... field14=utime field15=stime
                // Skip past (comm) which may contain spaces
                char* p = strrchr(buf, ')');
                if (p) {
                    long long utime = 0, stime = 0;
                    // After ') ' there are: state ppid pgrp session tty_nr tpgid flags
                    // minflt cminflt majflt cmajflt utime stime (fields 3..15 after ')')
                    int n = sscanf(p + 2, "%*c %*d %*d %*d %*d %*d %*u %*u %*u %*u %*u %lld %lld",
                                   &utime, &stime);
                    if (n == 2) ct.process_ticks += utime + stime;
                }
            }
            fclose(f);
        }
        closedir(task_dir);
    }

    // Read system-wide ticks from /proc/stat
    FILE* f = fopen("/proc/stat", "r");
    if (f) {
        char buf[256];
        if (fgets(buf, sizeof(buf), f)) {
            long long user, nice, sys, idle, iowait, irq, softirq;
            sscanf(buf, "cpu %lld %lld %lld %lld %lld %lld %lld",
                   &user, &nice, &sys, &idle, &iowait, &irq, &softirq);
            ct.system_total = user + nice + sys + idle + iowait + irq + softirq;
            ct.system_idle = idle + iowait;
        }
        fclose(f);
    }

    return ct;
}

// --- Phase timer with CPU utilization ---

struct PhaseTimer {
    std::chrono::steady_clock::time_point wall;
    CpuTicks ticks;
};

inline PhaseTimer phase_now() {
    return {std::chrono::steady_clock::now(), read_cpu_ticks()};
}

inline void log_phase(const char* name, PhaseTimer& pt) {
    auto now = std::chrono::steady_clock::now();
    auto ct = read_cpu_ticks();

    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(now - pt.wall).count();
    unsigned ncpu = std::thread::hardware_concurrency();

    long long delta_proc = ct.process_ticks - pt.ticks.process_ticks;
    long long delta_total = ct.system_total - pt.ticks.system_total;
    long long delta_idle = ct.system_idle - pt.ticks.system_idle;

    int sys_pct = (delta_total > 0) ? (int)((delta_total - delta_idle) * 100 / delta_total) : 0;
    int cores_used = (delta_total > 0) ? (int)((delta_total - delta_idle) * ncpu / delta_total) : 0;
    int proc_pct = (delta_total > 0) ? (int)(delta_proc * ncpu * 100 / delta_total) : 0;

    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name
              << " [" << proc_pct << "% CPU, " << cores_used << "/" << ncpu << " cores]"
              << std::endl;

    pt.wall = now;
    pt.ticks = ct;
}

// Backwards-compatible overload for existing callers using steady_clock::time_point
inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t) {
    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
        std::chrono::steady_clock::now() - t).count();
    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name << std::endl;
    t = std::chrono::steady_clock::now();
}


<tool_use_error>String to replace not found in file.
String: #include <sys/stat.h>

#include "types.h"
#include "string_pool.h"

// --- Directory creation ---

inline void ensure_dir(const std::string& path) {
    // Recursive mkdir — create all parent directories
    for (size_t i = 1; i < path.size(); i++) {
        if (path[i] == '/') {
            mkdir(path.substr(0, i).c_str(), 0755);
        }
    }
    mkdir(path.c_str(), 0755);
}

// --- Phase timer ---

inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t) {
    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
        std::chrono::steady_clock::now() - t).count();
    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name << std::endl;
    t = std::chrono::steady_clock::now();
}</tool_use_error>

Error: String to replace not found in file.
String: #include <sys/stat.h>

#include "types.h"
#include "string_pool.h"

// --- Directory creation ---

inline void ensure_dir(const std::string& path) {
    // Recursive mkdir — create all parent directories
    for (size_t i = 1; i < path.size(); i++) {
        if (path[i] == '/') {
            mkdir(path.substr(0, i).c_str(), 0755);
        }
    }
    mkdir(path.c_str(), 0755);
}

// --- Phase timer ---

inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t) {
    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
        std::chrono::steady_clock::now() - t).count();
    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name << std::endl;
    t = std::chrono::steady_clock::now();
}


     1→#pragma once
     2→
     3→#include <algorithm>
     4→#include <chrono>
     5→#include <iostream>
     6→#include <string>
     7→#include <unordered_map>
     8→#include <vector>
     9→
    10→#include <cstdio>
    11→#include <iomanip>
    12→#include <thread>
    13→#include <unistd.h>
    14→#include <sys/stat.h>
    15→
    16→#include "types.h"
    17→#include "string_pool.h"
    18→
    19→// --- Directory creation ---
    20→
    21→inline void ensure_dir(const std::string& path) {
    22→    // Recursive mkdir — create all parent directories
    23→    for (size_t i = 1; i < path.size(); i++) {
    24→        if (path[i] == '/') {
    25→            mkdir(path.substr(0, i).c_str(), 0755);
    26→        }
    27→    }
    28→    mkdir(path.c_str(), 0755);
    29→}
    30→
    31→// --- Phase timer with CPU utilization ---
    32→
    33→struct CpuTicks {
    34→    long user = 0;
    35→    long system = 0;
    36→    static CpuTicks now() {
    37→        CpuTicks c;
    38→        FILE* f = fopen("/proc/self/stat", "r");
    39→        if (f) {
    40→            // Fields: pid comm state ppid ... field14=utime field15=stime
    41→            // Skip to field 14 (utime) and 15 (stime)
    42→            long vals[52] = {};
    43→            // Read past "pid (comm) state" then numeric fields
    44→            int pid; char comm[256]; char state;
    45→            if (fscanf(f, "%d %255s %c", &pid, comm, &state) == 3) {
    46→                for (int i = 3; i < 17; i++) {
    47→                    if (fscanf(f, " %ld", &vals[i]) != 1) break;
    48→                }
    49→                c.user = vals[13];   // utime (field 14, 0-indexed 13)
    50→                c.system = vals[14]; // stime (field 15, 0-indexed 14)
    51→                // Add child times
    52→                c.user += vals[15];  // cutime
    53→                c.system += vals[16]; // cstime
    54→            }
    55→            fclose(f);
    56→        }
    57→        return c;
    58→    }
    59→    long total() const { return user + system; }
    60→};
    61→
    62→inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t,
    63→                       CpuTicks& prev_cpu) {
    64→    auto now = std::chrono::steady_clock::now();
    65→    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(now - t).count();
    66→    auto cpu_now = CpuTicks::now();
    67→    long cpu_ticks = cpu_now.total() - prev_cpu.total();
    68→    long clk_hz = sysconf(_SC_CLK_TCK);
    69→    double cpu_sec = (clk_hz > 0) ? (double)cpu_ticks / clk_hz : 0;
    70→    double wall_sec = ms / 1000.0;
    71→    double cores_used = (wall_sec > 0.1) ? cpu_sec / wall_sec : 0;
    72→    int ncpu = std::thread::hardware_concurrency();
    73→    int pct = (wall_sec > 0.1 && ncpu > 0) ? (int)(cores_used * 100.0 / ncpu) : 0;
    74→    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s"
    75→              << " " << std::fixed << std::setprecision(0) << cores_used << "/" << ncpu << "cores"
    76→              << " " << pct << "%] " << name << std::endl;
    77→    t = now;
    78→    prev_cpu = cpu_now;
    79→}
    80→
    81→// Backward compat overload (no CPU tracking)
    82→inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t) {
    83→    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
    84→        std::chrono::steady_clock::now() - t).count();
    85→    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name << std::endl;
    86→    t = std::chrono::steady_clock::now();
    87→}
    88→
    89→// --- Parsed data container ---
    90→
    91→struct ParsedData {
    92→    StringPool string_pool;
    93→    std::vector<WayHeader> ways;
    94→    std::vector<NodeCoord> street_nodes;
    95→    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_ways;
    96→    std::vector<AddrPoint> addr_points;
    97→    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_addrs;
    98→    std::vector<InterpWay> interp_ways;
    99→    std::vector<NodeCoord> interp_nodes;
   100→    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_interps;
   101→    std::vector<AdminPolygon> admin_polygons;
   102→    std::vector<NodeCoord> admin_vertices;
   103→    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_admin;
   104→
   105→    // Deferred work for parallel S2 computation (ways + interps)
   106→    std::vector<DeferredWay> deferred_ways;
   107→    std::vector<DeferredInterp> deferred_interps;
   108→
   109→    // Sorted (cell_id, item_id) pairs — kept for direct entry writing
   110→    std::vector<CellItemPair> sorted_way_cells;
   111→    std::vector<CellItemPair> sorted_addr_cells;
   112→    std::vector<CellItemPair> sorted_interp_cells;
   113→
   114→    // Collected data for parallel admin assembly
   115→    std::vector<CollectedRelation> collected_relations;
   116→    struct WayGeometry {
   117→        std::vector<std::pair<double,double>> coords;
   118→        int64_t first_node_id;
   119→        int64_t last_node_id;
   120→    };
   121→    std::unordered_map<int64_t, WayGeometry> way_geometries;
   122→};
   123→
   124→// --- Deduplicate IDs per cell ---
   125→
   126→template<typename Map>
   127→inline void deduplicate(Map& cell_map) {
   128→    for (auto& [cell_id, ids] : cell_map) {
   129→        std::sort(ids.begin(), ids.end());
   130→        ids.erase(std::unique(ids.begin(), ids.end()), ids.end());
   131→    }
   132→}
   133→

#pragma once

#include <algorithm>
#include <chrono>
#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>

#include <cstdio>
#include <iomanip>
#include <thread>
#include <unistd.h>
#include <sys/stat.h>

#include "types.h"
#include "string_pool.h"

// --- Directory creation ---

inline void ensure_dir(const std::string& path) {
    // Recursive mkdir — create all parent directories
    for (size_t i = 1; i < path.size(); i++) {
        if (path[i] == '/') {
            mkdir(path.substr(0, i).c_str(), 0755);
        }
    }
    mkdir(path.c_str(), 0755);
}

// --- Phase timer with CPU utilization ---

struct CpuTicks {
    long user = 0;
    long system = 0;
    static CpuTicks now() {
        CpuTicks c;
        FILE* f = fopen("/proc/self/stat", "r");
        if (f) {
            // Fields: pid comm state ppid ... field14=utime field15=stime
            // Skip to field 14 (utime) and 15 (stime)
            long vals[52] = {};
            // Read past "pid (comm) state" then numeric fields
            int pid; char comm[256]; char state;
            if (fscanf(f, "%d %255s %c", &pid, comm, &state) == 3) {
                for (int i = 3; i < 17; i++) {
                    if (fscanf(f, " %ld", &vals[i]) != 1) break;
                }
                c.user = vals[13];   // utime (field 14, 0-indexed 13)
                c.system = vals[14]; // stime (field 15, 0-indexed 14)
                // Add child times
                c.user += vals[15];  // cutime
                c.system += vals[16]; // cstime
            }
            fclose(f);
        }
        return c;
    }
    long total() const { return user + system; }
};

inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t,
                       CpuTicks& prev_cpu) {
    auto now = std::chrono::steady_clock::now();
    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(now - t).count();
    auto cpu_now = CpuTicks::now();
    long cpu_ticks = cpu_now.total() - prev_cpu.total();
    long clk_hz = sysconf(_SC_CLK_TCK);
    double cpu_sec = (clk_hz > 0) ? (double)cpu_ticks / clk_hz : 0;
    double wall_sec = ms / 1000.0;
    double cores_used = (wall_sec > 0.1) ? cpu_sec / wall_sec : 0;
    int ncpu = std::thread::hardware_concurrency();
    int pct = (wall_sec > 0.1 && ncpu > 0) ? (int)(cores_used * 100.0 / ncpu) : 0;
    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s"
              << " " << std::fixed << std::setprecision(0) << cores_used << "/" << ncpu << "cores"
              << " " << pct << "%] " << name << std::endl;
    t = now;
    prev_cpu = cpu_now;
}

// Backward compat overload (no CPU tracking)
inline void log_phase(const char* name, std::chrono::steady_clock::time_point& t) {
    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
        std::chrono::steady_clock::now() - t).count();
    std::cerr << "  [" << ms/1000 << "." << (ms%1000)/100 << "s] " << name << std::endl;
    t = std::chrono::steady_clock::now();
}

// --- Parsed data container ---

struct ParsedData {
    StringPool string_pool;
    std::vector<WayHeader> ways;
    std::vector<NodeCoord> street_nodes;
    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_ways;
    std::vector<AddrPoint> addr_points;
    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_addrs;
    std::vector<InterpWay> interp_ways;
    std::vector<NodeCoord> interp_nodes;
    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_interps;
    std::vector<AdminPolygon> admin_polygons;
    std::vector<NodeCoord> admin_vertices;
    std::unordered_map<uint64_t, std::vector<uint32_t>> cell_to_admin;

    // Deferred work for parallel S2 computation (ways + interps)
    std::vector<DeferredWay> deferred_ways;
    std::vector<DeferredInterp> deferred_interps;

    // Sorted (cell_id, item_id) pairs — kept for direct entry writing
    std::vector<CellItemPair> sorted_way_cells;
    std::vector<CellItemPair> sorted_addr_cells;
    std::vector<CellItemPair> sorted_interp_cells;

    // Collected data for parallel admin assembly
    std::vector<CollectedRelation> collected_relations;
    struct WayGeometry {
        std::vector<std::pair<double,double>> coords;
        int64_t first_node_id;
        int64_t last_node_id;
    };
    std::unordered_map<int64_t, WayGeometry> way_geometries;
};

// --- Deduplicate IDs per cell ---

template<typename Map>
inline void deduplicate(Map& cell_map) {
    for (auto& [cell_id, ids] : cell_map) {
        std::sort(ids.begin(), ids.end());
        ids.erase(std::unique(ids.begin(), ids.end()), ids.end());
    }
}


176:    auto _pt = std::chrono::steady_clock::now();
267:            log_phase("Pass 1: relation scanning", _pt);
400:                log_phase("Pass 2: node processing", _pt);

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   175→    ParsedData data;
   176→    auto _pt = std::chrono::steady_clock::now();
   177→

    ParsedData data;
    auto _pt = std::chrono::steady_clock::now();


There's already a CPU-tracking version of `log_phase`! It reads `/proc/self/stat` — but the problem is that `/proc/self/stat` only reports ticks for the main thread, not child threads. The `cutime`/`cstime` fields only count waited-for child processes, not `std::thread` or `std::async` threads. I need to iterate `/proc/self/task/*/stat` to sum all threads.

Let me also check which `log_phase` overload is actually being used in build_index.cpp:


176:    auto _pt = std::chrono::steady_clock::now();
267:            log_phase("Pass 1: relation scanning", _pt);
400:                log_phase("Pass 2: node processing", _pt);
786:                    log_phase("Pass 2b: way processing", _pt);
905:                    log_phase("    Admin: ring assembly", _pt);
962:                    log_phase("    Admin: parallel simplify", _pt);
992:                    log_phase("    Admin: append + submit S2", _pt);
1012:        log_phase("    Admin: S2 covering drain", _pt);
1021:            log_phase("Admin assembly", _pt);
1065:            log_phase("  S2: street ways (parallel)", _s2t);

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    ParsedData data;
    auto _pt = std::chrono::steady_clock::now();

    ParsedData data;
    auto _pt = std::chrono::steady_clock::now();
    auto _cpu = CpuTicks::now();