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Add sample interval to prof last-N dump

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This commit is contained in:
Yinan Zhang 2020-11-13 11:28:37 -08:00
parent cf2549a149
commit 9545c2cd36
2 changed files with 14 additions and 7 deletions
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3
src/prof_recent.c
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@ -540,6 +540,9 @@ prof_recent_alloc_dump(tsd_t *tsd, write_cb_t *write_cb, void *cbopaque) {
malloc_mutex_unlock(tsd_tsdn(tsd), &prof_recent_alloc_mtx);
emitter_begin(&emitter);
uint64_t sample_interval = (uint64_t)1U << lg_prof_sample;
emitter_json_kv(&emitter, "sample_interval", emitter_type_uint64,
&sample_interval);
emitter_json_kv(&emitter, "recent_alloc_max", emitter_type_ssize,
&dump_max);
emitter_json_array_kv_begin(&emitter, "recent_alloc");

18
test/unit/prof_recent.c
View File

@ -370,16 +370,16 @@ typedef struct {
#define DUMP_ERROR "Dump output is wrong"
static void
confirm_record(const char *template,
const confirm_record_t *records, const size_t n_records) {
confirm_record(const char *template, const confirm_record_t *records,
const size_t n_records) {
static const char *types[2] = {"alloc", "dalloc"};
static char buf[64];
/*
* The template string would be in the form of:
* "{\"recent_alloc_max\":XYZ,\"recent_alloc\":[]}",
* "{...,\"recent_alloc\":[]}",
* and dump_out would be in the form of:
* "{\"recent_alloc_max\":XYZ,\"recent_alloc\":[...]}".
* "{...,\"recent_alloc\":[...]}".
* Using "- 2" serves to cut right before the ending "]}".
*/
assert_d_eq(memcmp(dump_out, template, strlen(template) - 2), 0,
@ -489,18 +489,22 @@ TEST_BEGIN(test_prof_recent_alloc_dump) {
void *p, *q;
confirm_record_t records[2];
assert_zu_eq(lg_prof_sample, (size_t)0,
"lg_prof_sample not set correctly");
future = 0;
assert_d_eq(mallctl("experimental.prof_recent.alloc_max",
NULL, NULL, &future, sizeof(ssize_t)), 0, "Write error");
call_dump();
expect_str_eq(dump_out, "{\"recent_alloc_max\":0,\"recent_alloc\":[]}",
DUMP_ERROR);
expect_str_eq(dump_out, "{\"sample_interval\":1,"
"\"recent_alloc_max\":0,\"recent_alloc\":[]}", DUMP_ERROR);
future = 2;
assert_d_eq(mallctl("experimental.prof_recent.alloc_max",
NULL, NULL, &future, sizeof(ssize_t)), 0, "Write error");
call_dump();
const char *template = "{\"recent_alloc_max\":2,\"recent_alloc\":[]}";
const char *template = "{\"sample_interval\":1,"
"\"recent_alloc_max\":2,\"recent_alloc\":[]}";
expect_str_eq(dump_out, template, DUMP_ERROR);
p = malloc(7);