mirror of
https://github.com/git/git.git
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d57c671a51
Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
116 lines
3.0 KiB
C
116 lines
3.0 KiB
C
#include "git-compat-util.h"
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#include "trace2/tr2_tgt.h"
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#include "trace2/tr2_tls.h"
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#include "trace2/tr2_ctr.h"
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/*
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* A global counter block to aggregrate values from the partial sums
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* from each thread.
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*/
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static struct tr2_counter_block final_counter_block; /* access under tr2tls_mutex */
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/*
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* Define metadata for each global counter.
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*
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* This array must match the "enum trace2_counter_id" and the values
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* in "struct tr2_counter_block.counter[*]".
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*/
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static struct tr2_counter_metadata tr2_counter_metadata[TRACE2_NUMBER_OF_COUNTERS] = {
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[TRACE2_COUNTER_ID_TEST1] = {
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.category = "test",
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.name = "test1",
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.want_per_thread_events = 0,
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},
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[TRACE2_COUNTER_ID_TEST2] = {
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.category = "test",
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.name = "test2",
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.want_per_thread_events = 1,
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},
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[TRACE2_COUNTER_ID_PACKED_REFS_JUMPS] = {
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.category = "packed-refs",
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.name = "jumps_made",
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.want_per_thread_events = 0,
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},
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[TRACE2_COUNTER_ID_FSYNC_WRITEOUT_ONLY] = {
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.category = "fsync",
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.name = "writeout-only",
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.want_per_thread_events = 0,
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},
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[TRACE2_COUNTER_ID_FSYNC_HARDWARE_FLUSH] = {
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.category = "fsync",
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.name = "hardware-flush",
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.want_per_thread_events = 0,
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},
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/* Add additional metadata before here. */
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};
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void tr2_counter_increment(enum trace2_counter_id cid, uint64_t value)
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{
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struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
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struct tr2_counter *c = &ctx->counter_block.counter[cid];
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c->value += value;
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ctx->used_any_counter = 1;
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if (tr2_counter_metadata[cid].want_per_thread_events)
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ctx->used_any_per_thread_counter = 1;
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}
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void tr2_update_final_counters(void)
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{
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struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
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enum trace2_counter_id cid;
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if (!ctx->used_any_counter)
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return;
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/*
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* Access `final_counter_block` requires holding `tr2tls_mutex`.
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* We assume that our caller is holding the lock.
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*/
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for (cid = 0; cid < TRACE2_NUMBER_OF_COUNTERS; cid++) {
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struct tr2_counter *c_final = &final_counter_block.counter[cid];
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const struct tr2_counter *c = &ctx->counter_block.counter[cid];
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c_final->value += c->value;
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}
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}
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void tr2_emit_per_thread_counters(tr2_tgt_evt_counter_t *fn_apply)
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{
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struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
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enum trace2_counter_id cid;
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if (!ctx->used_any_per_thread_counter)
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return;
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/*
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* For each counter, if the counter wants per-thread events
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* and this thread used it (the value is non-zero), emit it.
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*/
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for (cid = 0; cid < TRACE2_NUMBER_OF_COUNTERS; cid++)
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if (tr2_counter_metadata[cid].want_per_thread_events &&
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ctx->counter_block.counter[cid].value)
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fn_apply(&tr2_counter_metadata[cid],
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&ctx->counter_block.counter[cid],
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0);
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}
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void tr2_emit_final_counters(tr2_tgt_evt_counter_t *fn_apply)
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{
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enum trace2_counter_id cid;
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/*
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* Access `final_counter_block` requires holding `tr2tls_mutex`.
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* We assume that our caller is holding the lock.
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*/
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for (cid = 0; cid < TRACE2_NUMBER_OF_COUNTERS; cid++)
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if (final_counter_block.counter[cid].value)
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fn_apply(&tr2_counter_metadata[cid],
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&final_counter_block.counter[cid],
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1);
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}
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