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8387697: Avoid using os::Linux::query_accurate_process_memory_info in JFR

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Reviewed-by: mgronlun, stuefe
This commit is contained in:
Matthias Baesken 2026-07-07 07:29:39 +00:00
parent 5a7905643b
commit cb45fb887a
1 changed files with 5 additions and 30 deletions
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35
src/hotspot/os/linux/os_linux.cpp
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@ -2860,39 +2860,14 @@ void os::pd_print_cpu_info(outputStream* st, char* buf, size_t buflen) {
#if INCLUDE_JFR
// hwm (high water mark) in K for the VM RSS
static long jfr_rss_hwm_k = -1;
static void send_resident_set_size_event(ssize_t size, ssize_t peak) {
EventResidentSetSize event;
event.set_size(size * K);
event.set_peak(peak * K);
event.commit();
}
void os::jfr_report_memory_info() {
os::Linux::accurate_meminfo_t accurate_info;
if (os::Linux::query_accurate_process_memory_info(&accurate_info) && accurate_info.rss != -1) {
// unfortunately the smaps_rollup/accurate_info contains no hwm (high water mark) for RSS
struct rusage ru;
if (getrusage(RUSAGE_SELF, &ru) == 0) {
if (ru.ru_maxrss > jfr_rss_hwm_k) {
jfr_rss_hwm_k = ru.ru_maxrss;
}
}
// do not allow larger current RSS than hwm
if (accurate_info.rss > jfr_rss_hwm_k) {
jfr_rss_hwm_k = accurate_info.rss;
}
send_resident_set_size_event(accurate_info.rss, jfr_rss_hwm_k);
return;
}
os::Linux::meminfo_t info;
if (os::Linux::query_process_memory_info(&info)) {
send_resident_set_size_event(info.vmrss, info.vmhwm);
// Send the RSS JFR event
EventResidentSetSize event;
event.set_size(info.vmrss * K);
event.set_peak(info.vmhwm * K);
event.commit();
} else {
// Log a warning
static bool first_warning = true;