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[3.14] gh-132917: Use /proc/self/status for mem usage info. (GH-133544) #133718

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Merged
merged 1 commit into from
May 8, 2025
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[3.14] gh-132917: Use /proc/self/status for mem usage info. (GH-133544) #133718

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11 changes: 5 additions & 6 deletions Python/gc_free_threading.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1927,8 +1927,7 @@ get_process_mem_usage(void)
}

#elif __linux__
// Linux, use smaps_rollup (Kernel >= 4.4) for RSS + Swap
FILE* fp = fopen("/proc/self/smaps_rollup", "r");
FILE* fp = fopen("/proc/self/status", "r");
if (fp == NULL) {
return -1;
}
Expand All @@ -1938,11 +1937,11 @@ get_process_mem_usage(void)
long long swap_kb = -1;

while (fgets(line_buffer, sizeof(line_buffer), fp) != NULL) {
if (rss_kb == -1 && strncmp(line_buffer, "Rss:", 4) == 0) {
sscanf(line_buffer + 4, "%lld", &rss_kb);
if (rss_kb == -1 && strncmp(line_buffer, "VmRSS:", 6) == 0) {
sscanf(line_buffer + 6, "%lld", &rss_kb);
}
else if (swap_kb == -1 && strncmp(line_buffer, "Swap:", 5) == 0) {
sscanf(line_buffer + 5, "%lld", &swap_kb);
else if (swap_kb == -1 && strncmp(line_buffer, "VmSwap:", 7) == 0) {
sscanf(line_buffer + 7, "%lld", &swap_kb);
}
if (rss_kb != -1 && swap_kb != -1) {
break; // Found both
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