Allows capture of raw_syscall:* events and analyzed at a later
time.
Signed-off-by: David Ahern <dsah...@gmail.com>
Cc: Adrian Hunter <adrian.hun...@intel.com>
Cc: Frederic Weisbecker <fweis...@gmail.com>
Cc: Mike Galbraith <efa...@gmx.de>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Stephane Eranian <eran...@google.com>
---
tools/perf/Documentation/perf-trace.txt | 4 ++
tools/perf/builtin-trace.c | 92 ++++++++++++++++++++++++++++++-
2 files changed, 95 insertions(+), 1 deletion(-)
diff --git a/tools/perf/Documentation/perf-trace.txt
b/tools/perf/Documentation/perf-trace.txt
index fe19811..34c459b 100644
--- a/tools/perf/Documentation/perf-trace.txt
+++ b/tools/perf/Documentation/perf-trace.txt
@@ -74,6 +74,10 @@ the thread executes on the designated CPUs. Default is to
monitor all CPUs.
--sched:
Accrue thread runtime and provide a summary at the end of the session.
+-r
+--replay
+ Process events from a given perf data file.
+
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-script[1]
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index b72afc7..a0a1540 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -4,6 +4,7 @@
#include "util/debug.h"
#include "util/evlist.h"
#include "util/machine.h"
+#include "util/session.h"
#include "util/thread.h"
#include "util/parse-options.h"
#include "util/strlist.h"
@@ -648,6 +649,36 @@ out_dump:
return 0;
}
+static int trace__process_sample(struct perf_tool *tool,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct machine *machine __maybe_unused)
+{
+ struct trace *trace = container_of(tool, struct trace, tool);
+ int err = 0;
+
+ tracepoint_handler handler = evsel->handler.func;
+
+ if (trace->base_time == 0)
+ trace->base_time = sample->time;
+
+ if (handler)
+ handler(trace, evsel, sample);
+
+ return err;
+}
+
+static bool
+perf_session__has_tp(struct perf_session *session, const char *name)
+{
+ struct perf_evsel *evsel;
+
+ evsel = perf_evlist__find_tracepoint_by_name(session->evlist, name);
+
+ return evsel != NULL;
+}
+
static int trace__run(struct trace *trace, int argc, const char **argv)
{
struct perf_evlist *evlist = perf_evlist__new();
@@ -787,6 +818,61 @@ out:
return err;
}
+static int trace__replay(struct trace *trace)
+{
+ const struct perf_evsel_str_handler handlers[] = {
+ { "raw_syscalls:sys_enter", trace__sys_enter, },
+ { "raw_syscalls:sys_exit", trace__sys_exit, },
+ };
+
+ struct perf_session *session;
+ int err = -1;
+
+ trace->tool.sample = trace__process_sample;
+ trace->tool.mmap = perf_event__process_mmap;
+ trace->tool.comm = perf_event__process_comm;
+ trace->tool.exit = perf_event__process_exit;
+ trace->tool.fork = perf_event__process_fork;
+ trace->tool.attr = perf_event__process_attr;
+ trace->tool.tracing_data = perf_event__process_tracing_data;
+ trace->tool.build_id = perf_event__process_build_id;
+
+ trace->tool.ordered_samples = true;
+ trace->tool.ordering_requires_timestamps = true;
+
+ if (symbol__init() < 0)
+ return -1;
+
+ session = perf_session__new(input_name, O_RDONLY, 0, false,
&trace->tool);
+ if (session == NULL)
+ return -ENOMEM;
+
+ err = perf_session__set_tracepoints_handlers(session, handlers);
+ if (err)
+ goto out;
+
+ if (!perf_session__has_tp(session, "raw_syscalls:sys_enter")) {
+ pr_err("Data file does not have raw_syscalls:sys_enter
events\n");
+ goto out;
+ }
+
+ if (!perf_session__has_tp(session, "raw_syscalls:sys_exit")) {
+ pr_err("Data file does not have raw_syscalls:sys_exit
events\n");
+ goto out;
+ }
+
+ setup_pager();
+
+ err = perf_session__process_events(session, &trace->tool);
+ if (err)
+ pr_err("Failed to process events, error %d", err);
+
+out:
+ perf_session__delete(session);
+
+ return err;
+}
+
static size_t trace__fprintf_threads_header(FILE *fp)
{
size_t printed;
@@ -888,6 +974,7 @@ int cmd_trace(int argc, const char **argv, const char
*prefix __maybe_unused)
OPT_STRING('e', "expr", &ev_qualifier_str, "expr",
"list of events to trace"),
OPT_STRING('o', "output", &output_name, "file", "output file name"),
+ OPT_STRING('r', "replay", &input_name, "file", "Analyze events in
file"),
OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
"trace events on existing process id"),
OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
@@ -954,7 +1041,10 @@ int cmd_trace(int argc, const char **argv, const char
*prefix __maybe_unused)
if (!argc && perf_target__none(&trace.opts.target))
trace.opts.target.system_wide = true;
- err = trace__run(&trace, argc, argv);
+ if (input_name)
+ err = trace__replay(&trace);
+ else
+ err = trace__run(&trace, argc, argv);
if (trace.sched && !err)
trace__fprintf_thread_summary(&trace, trace.output);
--
1.7.10.1
--
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