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Add thread.peak.[read|reset] mallctls.

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These can be used to track net allocator activity on a per-thread basis.
This commit is contained in:
David Goldblatt 2020-05-27 14:31:00 -07:00 • committed by David Goldblatt
parent fe7108305a
commit d82a164d0d
13 changed files with 269 additions and 5 deletions
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41
src/ctl.c
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@ -9,6 +9,7 @@
#include "jemalloc/internal/inspect.h"
#include "jemalloc/internal/mutex.h"
#include "jemalloc/internal/nstime.h"
#include "jemalloc/internal/peak_event.h"
#include "jemalloc/internal/sc.h"
#include "jemalloc/internal/util.h"
@ -61,6 +62,8 @@ CTL_PROTO(background_thread)
CTL_PROTO(max_background_threads)
CTL_PROTO(thread_tcache_enabled)
CTL_PROTO(thread_tcache_flush)
CTL_PROTO(thread_peak_read)
CTL_PROTO(thread_peak_reset)
CTL_PROTO(thread_prof_name)
CTL_PROTO(thread_prof_active)
CTL_PROTO(thread_arena)
@ -294,6 +297,11 @@ static const ctl_named_node_t thread_tcache_node[] = {
{NAME("flush"), CTL(thread_tcache_flush)}
};
static const ctl_named_node_t thread_peak_node[] = {
{NAME("read"), CTL(thread_peak_read)},
{NAME("reset"), CTL(thread_peak_reset)},
};
static const ctl_named_node_t thread_prof_node[] = {
{NAME("name"), CTL(thread_prof_name)},
{NAME("active"), CTL(thread_prof_active)}
@ -306,6 +314,7 @@ static const ctl_named_node_t thread_node[] = {
{NAME("deallocated"), CTL(thread_deallocated)},
{NAME("deallocatedp"), CTL(thread_deallocatedp)},
{NAME("tcache"), CHILD(named, thread_tcache)},
{NAME("peak"), CHILD(named, thread_peak)},
{NAME("prof"), CHILD(named, thread_prof)},
{NAME("idle"), CTL(thread_idle)}
};
@ -1953,6 +1962,38 @@ label_return:
return ret;
}
static int
thread_peak_read_ctl(tsd_t *tsd, const size_t *mib,
size_t miblen, void *oldp, size_t *oldlenp, void *newp,
size_t newlen) {
int ret;
if (!config_stats) {
return ENOENT;
}
READONLY();
peak_event_update(tsd);
uint64_t result = peak_event_max(tsd);
READ(result, uint64_t);
ret = 0;
label_return:
return ret;
}
static int
thread_peak_reset_ctl(tsd_t *tsd, const size_t *mib,
size_t miblen, void *oldp, size_t *oldlenp, void *newp,
size_t newlen) {
int ret;
if (!config_stats) {
return ENOENT;
}
NEITHER_READ_NOR_WRITE();
peak_event_zero(tsd);
ret = 0;
label_return:
return ret;
}
static int
thread_prof_name_ctl(tsd_t *tsd, const size_t *mib,
size_t miblen, void *oldp, size_t *oldlenp, void *newp,