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https://github.com/git/git
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![Jeff Hostetler](/assets/img/avatar_default.png)
Add global counters mechanism to Trace2. The Trace2 counters mechanism adds the ability to create a set of global counter variables and an API to increment them efficiently. Counters can optionally report per-thread usage in addition to the sum across all threads. Counter events are emitted to the Trace2 logs when a thread exits and at process exit. Counters are an alternative to `data` and `data_json` events. Counters are useful when you want to measure something across the life of the process, when you don't want per-measurement events for performance reasons, when the data does not fit conveniently within a region, or when your control flow does not easily let you write the final total. For example, you might use this to report the number of calls to unzip() or the number of de-delta steps during a checkout. Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
403 lines
11 KiB
C
403 lines
11 KiB
C
#include "cache.h"
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#include "config.h"
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#include "run-command.h"
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#include "quote.h"
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#include "version.h"
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#include "trace2/tr2_dst.h"
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#include "trace2/tr2_sysenv.h"
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#include "trace2/tr2_tbuf.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_tmr.h"
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static struct tr2_dst tr2dst_normal = {
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.sysenv_var = TR2_SYSENV_NORMAL,
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};
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/*
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* Use the TR2_SYSENV_NORMAL_BRIEF setting to omit the "<time> <file>:<line>"
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* fields from each line written to the builtin normal target.
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*
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* Unit tests may want to use this to help with testing.
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*/
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static int tr2env_normal_be_brief;
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#define TR2FMT_NORMAL_FL_WIDTH (50)
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static int fn_init(void)
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{
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int want = tr2_dst_trace_want(&tr2dst_normal);
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int want_brief;
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const char *brief;
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if (!want)
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return want;
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brief = tr2_sysenv_get(TR2_SYSENV_NORMAL_BRIEF);
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if (brief && *brief &&
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((want_brief = git_parse_maybe_bool(brief)) != -1))
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tr2env_normal_be_brief = want_brief;
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return want;
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}
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static void fn_term(void)
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{
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tr2_dst_trace_disable(&tr2dst_normal);
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}
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static void normal_fmt_prepare(const char *file, int line, struct strbuf *buf)
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{
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strbuf_setlen(buf, 0);
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if (!tr2env_normal_be_brief) {
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struct tr2_tbuf tb_now;
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tr2_tbuf_local_time(&tb_now);
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strbuf_addstr(buf, tb_now.buf);
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strbuf_addch(buf, ' ');
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if (file && *file)
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strbuf_addf(buf, "%s:%d ", file, line);
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while (buf->len < TR2FMT_NORMAL_FL_WIDTH)
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strbuf_addch(buf, ' ');
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}
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}
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static void normal_io_write_fl(const char *file, int line,
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const struct strbuf *buf_payload)
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{
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struct strbuf buf_line = STRBUF_INIT;
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normal_fmt_prepare(file, line, &buf_line);
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strbuf_addbuf(&buf_line, buf_payload);
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tr2_dst_write_line(&tr2dst_normal, &buf_line);
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strbuf_release(&buf_line);
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}
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static void fn_version_fl(const char *file, int line)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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strbuf_addf(&buf_payload, "version %s", git_version_string);
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_start_fl(const char *file, int line,
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uint64_t us_elapsed_absolute, const char **argv)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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strbuf_addstr(&buf_payload, "start ");
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sq_append_quote_argv_pretty(&buf_payload, argv);
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_exit_fl(const char *file, int line, uint64_t us_elapsed_absolute,
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int code)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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double elapsed = (double)us_elapsed_absolute / 1000000.0;
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strbuf_addf(&buf_payload, "exit elapsed:%.6f code:%d", elapsed, code);
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_signal(uint64_t us_elapsed_absolute, int signo)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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double elapsed = (double)us_elapsed_absolute / 1000000.0;
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strbuf_addf(&buf_payload, "signal elapsed:%.6f code:%d", elapsed,
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signo);
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normal_io_write_fl(__FILE__, __LINE__, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_atexit(uint64_t us_elapsed_absolute, int code)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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double elapsed = (double)us_elapsed_absolute / 1000000.0;
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strbuf_addf(&buf_payload, "atexit elapsed:%.6f code:%d", elapsed, code);
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normal_io_write_fl(__FILE__, __LINE__, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void maybe_append_string_va(struct strbuf *buf, const char *fmt,
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va_list ap)
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{
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if (fmt && *fmt) {
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va_list copy_ap;
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va_copy(copy_ap, ap);
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strbuf_vaddf(buf, fmt, copy_ap);
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va_end(copy_ap);
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return;
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}
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}
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static void fn_error_va_fl(const char *file, int line, const char *fmt,
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va_list ap)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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strbuf_addstr(&buf_payload, "error");
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if (fmt && *fmt) {
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strbuf_addch(&buf_payload, ' ');
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maybe_append_string_va(&buf_payload, fmt, ap);
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}
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_command_path_fl(const char *file, int line, const char *pathname)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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strbuf_addf(&buf_payload, "cmd_path %s", pathname);
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_command_ancestry_fl(const char *file, int line, const char **parent_names)
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{
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const char *parent_name = NULL;
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struct strbuf buf_payload = STRBUF_INIT;
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/* cmd_ancestry parent <- grandparent <- great-grandparent */
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strbuf_addstr(&buf_payload, "cmd_ancestry ");
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while ((parent_name = *parent_names++)) {
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strbuf_addstr(&buf_payload, parent_name);
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/* if we'll write another one after this, add a delimiter */
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if (parent_names && *parent_names)
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strbuf_addstr(&buf_payload, " <- ");
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}
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_command_name_fl(const char *file, int line, const char *name,
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const char *hierarchy)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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strbuf_addf(&buf_payload, "cmd_name %s", name);
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if (hierarchy && *hierarchy)
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strbuf_addf(&buf_payload, " (%s)", hierarchy);
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_command_mode_fl(const char *file, int line, const char *mode)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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strbuf_addf(&buf_payload, "cmd_mode %s", mode);
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_alias_fl(const char *file, int line, const char *alias,
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const char **argv)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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strbuf_addf(&buf_payload, "alias %s -> ", alias);
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sq_append_quote_argv_pretty(&buf_payload, argv);
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_child_start_fl(const char *file, int line,
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uint64_t us_elapsed_absolute,
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const struct child_process *cmd)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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strbuf_addf(&buf_payload, "child_start[%d]", cmd->trace2_child_id);
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if (cmd->dir) {
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strbuf_addstr(&buf_payload, " cd ");
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sq_quote_buf_pretty(&buf_payload, cmd->dir);
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strbuf_addstr(&buf_payload, ";");
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}
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/*
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* TODO if (cmd->env) { Consider dumping changes to environment. }
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* See trace_add_env() in run-command.c as used by original trace.c
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*/
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strbuf_addch(&buf_payload, ' ');
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if (cmd->git_cmd)
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strbuf_addstr(&buf_payload, "git ");
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sq_append_quote_argv_pretty(&buf_payload, cmd->args.v);
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_child_exit_fl(const char *file, int line,
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uint64_t us_elapsed_absolute, int cid, int pid,
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int code, uint64_t us_elapsed_child)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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double elapsed = (double)us_elapsed_child / 1000000.0;
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strbuf_addf(&buf_payload, "child_exit[%d] pid:%d code:%d elapsed:%.6f",
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cid, pid, code, elapsed);
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_child_ready_fl(const char *file, int line,
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uint64_t us_elapsed_absolute, int cid, int pid,
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const char *ready, uint64_t us_elapsed_child)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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double elapsed = (double)us_elapsed_child / 1000000.0;
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strbuf_addf(&buf_payload, "child_ready[%d] pid:%d ready:%s elapsed:%.6f",
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cid, pid, ready, elapsed);
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_exec_fl(const char *file, int line, uint64_t us_elapsed_absolute,
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int exec_id, const char *exe, const char **argv)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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strbuf_addf(&buf_payload, "exec[%d] ", exec_id);
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if (exe) {
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strbuf_addstr(&buf_payload, exe);
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strbuf_addch(&buf_payload, ' ');
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}
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sq_append_quote_argv_pretty(&buf_payload, argv);
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_exec_result_fl(const char *file, int line,
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uint64_t us_elapsed_absolute, int exec_id,
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int code)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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strbuf_addf(&buf_payload, "exec_result[%d] code:%d", exec_id, code);
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if (code > 0)
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strbuf_addf(&buf_payload, " err:%s", strerror(code));
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_param_fl(const char *file, int line, const char *param,
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const char *value)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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enum config_scope scope = current_config_scope();
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const char *scope_name = config_scope_name(scope);
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strbuf_addf(&buf_payload, "def_param scope:%s %s=%s", scope_name, param,
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value);
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_repo_fl(const char *file, int line,
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const struct repository *repo)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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strbuf_addstr(&buf_payload, "worktree ");
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sq_quote_buf_pretty(&buf_payload, repo->worktree);
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_printf_va_fl(const char *file, int line,
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uint64_t us_elapsed_absolute, const char *fmt,
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va_list ap)
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{
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struct strbuf buf_payload = STRBUF_INIT;
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maybe_append_string_va(&buf_payload, fmt, ap);
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normal_io_write_fl(file, line, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_timer(const struct tr2_timer_metadata *meta,
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const struct tr2_timer *timer,
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int is_final_data)
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{
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const char *event_name = is_final_data ? "timer" : "th_timer";
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struct strbuf buf_payload = STRBUF_INIT;
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double t_total = NS_TO_SEC(timer->total_ns);
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double t_min = NS_TO_SEC(timer->min_ns);
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double t_max = NS_TO_SEC(timer->max_ns);
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strbuf_addf(&buf_payload, ("%s %s/%s"
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" intervals:%"PRIu64
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" total:%8.6f min:%8.6f max:%8.6f"),
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event_name, meta->category, meta->name,
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timer->interval_count,
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t_total, t_min, t_max);
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normal_io_write_fl(__FILE__, __LINE__, &buf_payload);
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strbuf_release(&buf_payload);
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}
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static void fn_counter(const struct tr2_counter_metadata *meta,
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const struct tr2_counter *counter,
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int is_final_data)
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{
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const char *event_name = is_final_data ? "counter" : "th_counter";
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struct strbuf buf_payload = STRBUF_INIT;
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strbuf_addf(&buf_payload, "%s %s/%s value:%"PRIu64,
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event_name, meta->category, meta->name,
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counter->value);
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normal_io_write_fl(__FILE__, __LINE__, &buf_payload);
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strbuf_release(&buf_payload);
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}
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struct tr2_tgt tr2_tgt_normal = {
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.pdst = &tr2dst_normal,
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.pfn_init = fn_init,
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.pfn_term = fn_term,
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.pfn_version_fl = fn_version_fl,
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.pfn_start_fl = fn_start_fl,
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.pfn_exit_fl = fn_exit_fl,
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.pfn_signal = fn_signal,
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.pfn_atexit = fn_atexit,
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.pfn_error_va_fl = fn_error_va_fl,
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.pfn_command_path_fl = fn_command_path_fl,
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.pfn_command_ancestry_fl = fn_command_ancestry_fl,
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.pfn_command_name_fl = fn_command_name_fl,
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.pfn_command_mode_fl = fn_command_mode_fl,
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.pfn_alias_fl = fn_alias_fl,
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.pfn_child_start_fl = fn_child_start_fl,
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.pfn_child_exit_fl = fn_child_exit_fl,
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.pfn_child_ready_fl = fn_child_ready_fl,
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.pfn_thread_start_fl = NULL,
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.pfn_thread_exit_fl = NULL,
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.pfn_exec_fl = fn_exec_fl,
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.pfn_exec_result_fl = fn_exec_result_fl,
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.pfn_param_fl = fn_param_fl,
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.pfn_repo_fl = fn_repo_fl,
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.pfn_region_enter_printf_va_fl = NULL,
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.pfn_region_leave_printf_va_fl = NULL,
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.pfn_data_fl = NULL,
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.pfn_data_json_fl = NULL,
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.pfn_printf_va_fl = fn_printf_va_fl,
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.pfn_timer = fn_timer,
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.pfn_counter = fn_counter,
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};
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