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-rw-r--r--trace2/tr2_tgt_perf.c534
1 files changed, 534 insertions, 0 deletions
diff --git a/trace2/tr2_tgt_perf.c b/trace2/tr2_tgt_perf.c
new file mode 100644
index 0000000..f0746fc
--- /dev/null
+++ b/trace2/tr2_tgt_perf.c
@@ -0,0 +1,534 @@
+#include "cache.h"
+#include "config.h"
+#include "run-command.h"
+#include "quote.h"
+#include "version.h"
+#include "json-writer.h"
+#include "trace2/tr2_dst.h"
+#include "trace2/tr2_sid.h"
+#include "trace2/tr2_tbuf.h"
+#include "trace2/tr2_tgt.h"
+#include "trace2/tr2_tls.h"
+
+static struct tr2_dst tr2dst_perf = { "GIT_TR2_PERF", 0, 0, 0 };
+
+/*
+ * Set this environment variable to true to omit the "<time> <file>:<line>"
+ * fields from each line written to the builtin performance target.
+ *
+ * Unit tests may want to use this to help with testing.
+ */
+#define TR2_ENVVAR_PERF_BRIEF "GIT_TR2_PERF_BRIEF"
+static int tr2env_perf_brief;
+
+#define TR2FMT_PERF_FL_WIDTH (50)
+#define TR2FMT_PERF_MAX_EVENT_NAME (12)
+#define TR2FMT_PERF_REPO_WIDTH (4)
+#define TR2FMT_PERF_CATEGORY_WIDTH (10)
+
+#define TR2_DOTS_BUFFER_SIZE (100)
+#define TR2_INDENT (2)
+#define TR2_INDENT_LENGTH(ctx) (((ctx)->nr_open_regions - 1) * TR2_INDENT)
+
+static struct strbuf dots = STRBUF_INIT;
+
+static int fn_init(void)
+{
+ int want = tr2_dst_trace_want(&tr2dst_perf);
+ int want_brief;
+ char *brief;
+
+ if (!want)
+ return want;
+
+ strbuf_addchars(&dots, '.', TR2_DOTS_BUFFER_SIZE);
+
+ brief = getenv(TR2_ENVVAR_PERF_BRIEF);
+ if (brief && *brief &&
+ ((want_brief = git_parse_maybe_bool(brief)) != -1))
+ tr2env_perf_brief = want_brief;
+
+ return want;
+}
+
+static void fn_term(void)
+{
+ tr2_dst_trace_disable(&tr2dst_perf);
+
+ strbuf_release(&dots);
+}
+
+/*
+ * Format trace line prefix in human-readable classic format for
+ * the performance target:
+ * "[<time> [<file>:<line>] <bar>] <nr_parents> <bar>
+ * <thread_name> <bar> <event_name> <bar> [<repo>] <bar>
+ * [<elapsed_absolute>] [<elapsed_relative>] <bar>
+ * [<category>] <bar> [<dots>] "
+ */
+static void perf_fmt_prepare(const char *event_name,
+ struct tr2tls_thread_ctx *ctx, const char *file,
+ int line, const struct repository *repo,
+ uint64_t *p_us_elapsed_absolute,
+ uint64_t *p_us_elapsed_relative,
+ const char *category, struct strbuf *buf)
+{
+ int len;
+
+ strbuf_setlen(buf, 0);
+
+ if (!tr2env_perf_brief) {
+ struct tr2_tbuf tb_now;
+
+ tr2_tbuf_local_time(&tb_now);
+ strbuf_addstr(buf, tb_now.buf);
+ strbuf_addch(buf, ' ');
+
+ if (file && *file)
+ strbuf_addf(buf, "%s:%d ", file, line);
+ while (buf->len < TR2FMT_PERF_FL_WIDTH)
+ strbuf_addch(buf, ' ');
+
+ strbuf_addstr(buf, "| ");
+ }
+
+ strbuf_addf(buf, "d%d | ", tr2_sid_depth());
+ strbuf_addf(buf, "%-*s | %-*s | ", TR2_MAX_THREAD_NAME,
+ ctx->thread_name.buf, TR2FMT_PERF_MAX_EVENT_NAME,
+ event_name);
+
+ len = buf->len + TR2FMT_PERF_REPO_WIDTH;
+ if (repo)
+ strbuf_addf(buf, "r%d ", repo->trace2_repo_id);
+ while (buf->len < len)
+ strbuf_addch(buf, ' ');
+ strbuf_addstr(buf, "| ");
+
+ if (p_us_elapsed_absolute)
+ strbuf_addf(buf, "%9.6f | ",
+ ((double)(*p_us_elapsed_absolute)) / 1000000.0);
+ else
+ strbuf_addf(buf, "%9s | ", " ");
+
+ if (p_us_elapsed_relative)
+ strbuf_addf(buf, "%9.6f | ",
+ ((double)(*p_us_elapsed_relative)) / 1000000.0);
+ else
+ strbuf_addf(buf, "%9s | ", " ");
+
+ strbuf_addf(buf, "%-*s | ", TR2FMT_PERF_CATEGORY_WIDTH,
+ (category ? category : ""));
+
+ if (ctx->nr_open_regions > 0) {
+ int len_indent = TR2_INDENT_LENGTH(ctx);
+ while (len_indent > dots.len) {
+ strbuf_addbuf(buf, &dots);
+ len_indent -= dots.len;
+ }
+ strbuf_addf(buf, "%.*s", len_indent, dots.buf);
+ }
+}
+
+static void perf_io_write_fl(const char *file, int line, const char *event_name,
+ const struct repository *repo,
+ uint64_t *p_us_elapsed_absolute,
+ uint64_t *p_us_elapsed_relative,
+ const char *category,
+ const struct strbuf *buf_payload)
+{
+ struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
+ struct strbuf buf_line = STRBUF_INIT;
+
+ perf_fmt_prepare(event_name, ctx, file, line, repo,
+ p_us_elapsed_absolute, p_us_elapsed_relative, category,
+ &buf_line);
+ strbuf_addbuf(&buf_line, buf_payload);
+ tr2_dst_write_line(&tr2dst_perf, &buf_line);
+ strbuf_release(&buf_line);
+}
+
+static void fn_version_fl(const char *file, int line)
+{
+ const char *event_name = "version";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ strbuf_addstr(&buf_payload, git_version_string);
+
+ perf_io_write_fl(file, line, event_name, NULL, NULL, NULL, NULL,
+ &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_start_fl(const char *file, int line, const char **argv)
+{
+ const char *event_name = "start";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ sq_quote_argv_pretty(&buf_payload, argv);
+
+ perf_io_write_fl(file, line, event_name, NULL, NULL, NULL, NULL,
+ &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_exit_fl(const char *file, int line, uint64_t us_elapsed_absolute,
+ int code)
+{
+ const char *event_name = "exit";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ strbuf_addf(&buf_payload, "code:%d", code);
+
+ perf_io_write_fl(file, line, event_name, NULL, &us_elapsed_absolute,
+ NULL, NULL, &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_signal(uint64_t us_elapsed_absolute, int signo)
+{
+ const char *event_name = "signal";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ strbuf_addf(&buf_payload, "signo:%d", signo);
+
+ perf_io_write_fl(__FILE__, __LINE__, event_name, NULL,
+ &us_elapsed_absolute, NULL, NULL, &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_atexit(uint64_t us_elapsed_absolute, int code)
+{
+ const char *event_name = "atexit";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ strbuf_addf(&buf_payload, "code:%d", code);
+
+ perf_io_write_fl(__FILE__, __LINE__, event_name, NULL,
+ &us_elapsed_absolute, NULL, NULL, &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void maybe_append_string_va(struct strbuf *buf, const char *fmt,
+ va_list ap)
+{
+ if (fmt && *fmt && ap) {
+ va_list copy_ap;
+
+ va_copy(copy_ap, ap);
+ strbuf_vaddf(buf, fmt, copy_ap);
+ va_end(copy_ap);
+ return;
+ }
+
+ if (fmt && *fmt) {
+ strbuf_addstr(buf, fmt);
+ return;
+ }
+}
+
+static void fn_error_va_fl(const char *file, int line, const char *fmt,
+ va_list ap)
+{
+ const char *event_name = "error";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ maybe_append_string_va(&buf_payload, fmt, ap);
+
+ perf_io_write_fl(file, line, event_name, NULL, NULL, NULL, NULL,
+ &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_command_path_fl(const char *file, int line, const char *pathname)
+{
+ const char *event_name = "cmd_path";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ strbuf_addstr(&buf_payload, pathname);
+
+ perf_io_write_fl(file, line, event_name, NULL, NULL, NULL, NULL,
+ &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_command_name_fl(const char *file, int line, const char *name,
+ const char *hierarchy)
+{
+ const char *event_name = "cmd_name";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ strbuf_addstr(&buf_payload, name);
+ if (hierarchy && *hierarchy)
+ strbuf_addf(&buf_payload, " (%s)", hierarchy);
+
+ perf_io_write_fl(file, line, event_name, NULL, NULL, NULL, NULL,
+ &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_command_mode_fl(const char *file, int line, const char *mode)
+{
+ const char *event_name = "cmd_mode";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ strbuf_addstr(&buf_payload, mode);
+
+ perf_io_write_fl(file, line, event_name, NULL, NULL, NULL, NULL,
+ &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_alias_fl(const char *file, int line, const char *alias,
+ const char **argv)
+{
+ const char *event_name = "alias";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ strbuf_addf(&buf_payload, "alias:%s argv:", alias);
+ sq_quote_argv_pretty(&buf_payload, argv);
+
+ perf_io_write_fl(file, line, event_name, NULL, NULL, NULL, NULL,
+ &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_child_start_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute,
+ const struct child_process *cmd)
+{
+ const char *event_name = "child_start";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ if (cmd->trace2_hook_name) {
+ strbuf_addf(&buf_payload, "[ch%d] class:hook hook:%s",
+ cmd->trace2_child_id, cmd->trace2_hook_name);
+ } else {
+ const char *child_class =
+ cmd->trace2_child_class ? cmd->trace2_child_class : "?";
+ strbuf_addf(&buf_payload, "[ch%d] class:%s",
+ cmd->trace2_child_id, child_class);
+ }
+
+ if (cmd->dir) {
+ strbuf_addstr(&buf_payload, " cd:");
+ sq_quote_buf_pretty(&buf_payload, cmd->dir);
+ }
+
+ strbuf_addstr(&buf_payload, " argv:");
+ if (cmd->git_cmd)
+ strbuf_addstr(&buf_payload, " git");
+ sq_quote_argv_pretty(&buf_payload, cmd->argv);
+
+ perf_io_write_fl(file, line, event_name, NULL, &us_elapsed_absolute,
+ NULL, NULL, &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_child_exit_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, int cid, int pid,
+ int code, uint64_t us_elapsed_child)
+{
+ const char *event_name = "child_exit";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ strbuf_addf(&buf_payload, "[ch%d] pid:%d code:%d", cid, pid, code);
+
+ perf_io_write_fl(file, line, event_name, NULL, &us_elapsed_absolute,
+ &us_elapsed_child, NULL, &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_thread_start_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute)
+{
+ const char *event_name = "thread_start";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ perf_io_write_fl(file, line, event_name, NULL, &us_elapsed_absolute,
+ NULL, NULL, &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_thread_exit_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute,
+ uint64_t us_elapsed_thread)
+{
+ const char *event_name = "thread_exit";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ perf_io_write_fl(file, line, event_name, NULL, &us_elapsed_absolute,
+ &us_elapsed_thread, NULL, &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_exec_fl(const char *file, int line, uint64_t us_elapsed_absolute,
+ int exec_id, const char *exe, const char **argv)
+{
+ const char *event_name = "exec";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ strbuf_addf(&buf_payload, "id:%d ", exec_id);
+ strbuf_addstr(&buf_payload, "argv:");
+ if (exe)
+ strbuf_addf(&buf_payload, " %s", exe);
+ sq_quote_argv_pretty(&buf_payload, argv);
+
+ perf_io_write_fl(file, line, event_name, NULL, &us_elapsed_absolute,
+ NULL, NULL, &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_exec_result_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, int exec_id,
+ int code)
+{
+ const char *event_name = "exec_result";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ strbuf_addf(&buf_payload, "id:%d code:%d", exec_id, code);
+ if (code > 0)
+ strbuf_addf(&buf_payload, " err:%s", strerror(code));
+
+ perf_io_write_fl(file, line, event_name, NULL, &us_elapsed_absolute,
+ NULL, NULL, &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_param_fl(const char *file, int line, const char *param,
+ const char *value)
+{
+ const char *event_name = "def_param";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ strbuf_addf(&buf_payload, "%s:%s", param, value);
+
+ perf_io_write_fl(file, line, event_name, NULL, NULL, NULL, NULL,
+ &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_repo_fl(const char *file, int line,
+ const struct repository *repo)
+{
+ const char *event_name = "def_repo";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ strbuf_addstr(&buf_payload, "worktree:");
+ sq_quote_buf_pretty(&buf_payload, repo->worktree);
+
+ perf_io_write_fl(file, line, event_name, repo, NULL, NULL, NULL,
+ &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_region_enter_printf_va_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute,
+ const char *category,
+ const char *label,
+ const struct repository *repo,
+ const char *fmt, va_list ap)
+{
+ const char *event_name = "region_enter";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ if (label)
+ strbuf_addf(&buf_payload, "label:%s ", label);
+ maybe_append_string_va(&buf_payload, fmt, ap);
+
+ perf_io_write_fl(file, line, event_name, repo, &us_elapsed_absolute,
+ NULL, category, &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_region_leave_printf_va_fl(
+ const char *file, int line, uint64_t us_elapsed_absolute,
+ uint64_t us_elapsed_region, const char *category, const char *label,
+ const struct repository *repo, const char *fmt, va_list ap)
+{
+ const char *event_name = "region_leave";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ if (label)
+ strbuf_addf(&buf_payload, "label:%s ", label);
+ maybe_append_string_va(&buf_payload, fmt, ap);
+
+ perf_io_write_fl(file, line, event_name, repo, &us_elapsed_absolute,
+ &us_elapsed_region, category, &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_data_fl(const char *file, int line, uint64_t us_elapsed_absolute,
+ uint64_t us_elapsed_region, const char *category,
+ const struct repository *repo, const char *key,
+ const char *value)
+{
+ const char *event_name = "data";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ strbuf_addf(&buf_payload, "%s:%s", key, value);
+
+ perf_io_write_fl(file, line, event_name, repo, &us_elapsed_absolute,
+ &us_elapsed_region, category, &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_data_json_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute,
+ uint64_t us_elapsed_region, const char *category,
+ const struct repository *repo, const char *key,
+ const struct json_writer *value)
+{
+ const char *event_name = "data_json";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ strbuf_addf(&buf_payload, "%s:%s", key, value->json.buf);
+
+ perf_io_write_fl(file, line, event_name, repo, &us_elapsed_absolute,
+ &us_elapsed_region, category, &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+static void fn_printf_va_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, const char *fmt,
+ va_list ap)
+{
+ const char *event_name = "printf";
+ struct strbuf buf_payload = STRBUF_INIT;
+
+ maybe_append_string_va(&buf_payload, fmt, ap);
+
+ perf_io_write_fl(file, line, event_name, NULL, &us_elapsed_absolute,
+ NULL, NULL, &buf_payload);
+ strbuf_release(&buf_payload);
+}
+
+struct tr2_tgt tr2_tgt_perf = {
+ &tr2dst_perf,
+
+ fn_init,
+ fn_term,
+
+ fn_version_fl,
+ fn_start_fl,
+ fn_exit_fl,
+ fn_signal,
+ fn_atexit,
+ fn_error_va_fl,
+ fn_command_path_fl,
+ fn_command_name_fl,
+ fn_command_mode_fl,
+ fn_alias_fl,
+ fn_child_start_fl,
+ fn_child_exit_fl,
+ fn_thread_start_fl,
+ fn_thread_exit_fl,
+ fn_exec_fl,
+ fn_exec_result_fl,
+ fn_param_fl,
+ fn_repo_fl,
+ fn_region_enter_printf_va_fl,
+ fn_region_leave_printf_va_fl,
+ fn_data_fl,
+ fn_data_json_fl,
+ fn_printf_va_fl,
+};