From: Jiri Olsa <jolsa@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: lkml <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
David Ahern <dsahern@gmail.com>, Andi Kleen <ak@linux.intel.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: [PATCH 43/49] perf record: Add record_thread start/stop/process functions
Date: Tue, 9 Jan 2018 16:35:16 +0100 [thread overview]
Message-ID: <20180109153522.14116-44-jolsa@kernel.org> (raw)
In-Reply-To: <20180109153522.14116-1-jolsa@kernel.org>
Adding thread process and API to start/stop it.
Link: http://lkml.kernel.org/n/tip-bwa3w7lt63ffe78w4ggjc9dw@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/builtin-record.c | 83 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 83 insertions(+)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index fb15d4457cfa..5457eacf8821 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -64,6 +64,11 @@ struct switch_output {
bool set;
};
+enum {
+ RECORD_THREAD__RUNNING = 0,
+ RECORD_THREAD__STOP = 1,
+};
+
struct record_thread {
struct perf_mmap **mmap;
int mmap_nr;
@@ -73,6 +78,8 @@ struct record_thread {
struct record *rec;
unsigned long long samples;
u64 bytes_written;
+ pthread_t pt;
+ int state;
};
struct record {
@@ -1114,6 +1121,75 @@ record__threads_config(struct record *rec)
return ret;
}
+static void*
+record_thread__process(struct record *rec)
+{
+ while (thread->state != RECORD_THREAD__STOP) {
+ unsigned long long hits = thread->samples;
+ int err;
+
+ if (record__mmap_read_all(thread->rec) < 0)
+ break;
+
+ if (hits == thread->samples) {
+ err = fdarray__poll(&thread->pollfd, 500);
+ /*
+ * Propagate error, only if there's any. Ignore positive
+ * number of returned events and interrupt error.
+ */
+ if (err > 0 || (err < 0 && errno == EINTR))
+ err = 0;
+ rec->waking++;
+
+ if (fdarray__filter(&thread->pollfd, POLLERR|POLLHUP,
+ perf_mmap__put_filtered, NULL) == 0)
+ break;
+ }
+ }
+
+ return NULL;
+}
+
+static void *worker(void *arg)
+{
+ struct record_thread *th = arg;
+ struct record *rec = th->rec;
+
+ thread = th;
+ thread->state = RECORD_THREAD__RUNNING;
+
+ return record_thread__process(rec);
+}
+
+static int record__threads_start(struct record *rec)
+{
+ struct record_thread *threads = rec->threads;
+ int i, err = 0;
+
+ for (i = 1; !err && i < rec->threads_cnt; i++) {
+ struct record_thread *th = threads + i;
+
+ err = pthread_create(&th->pt, NULL, worker, th);
+ }
+
+ return err;
+}
+
+static int record__threads_stop(struct record *rec)
+{
+ struct record_thread *threads = rec->threads;
+ int i, err = 0;
+
+ for (i = 1; !err && i < rec->threads_cnt; i++) {
+ struct record_thread *th = threads + i;
+
+ th->state = RECORD_THREAD__STOP;
+ err = pthread_join(th->pt, NULL);
+ }
+
+ return err;
+}
+
static int __cmd_record(struct record *rec, int argc, const char **argv)
{
int err;
@@ -1250,6 +1326,10 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
}
}
+ err = record__threads_start(rec);
+ if (err < 0)
+ goto out_child;
+
/*
* When perf is starting the traced process, all the events
* (apart from group members) have enable_on_exec=1 set,
@@ -1414,6 +1494,9 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
trigger_off(&auxtrace_snapshot_trigger);
trigger_off(&switch_output_trigger);
+ if (record__threads_stop(rec))
+ pr_err("failed to stop threads\n");
+
if (forks && workload_exec_errno) {
char msg[STRERR_BUFSIZE];
const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
--
2.13.6
next prev parent reply other threads:[~2018-01-09 15:37 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-09 15:34 [RFC 00/49] perf tools: Add threads to record command Jiri Olsa
2018-01-09 15:34 ` [PATCH 01/49] perf tools: Remove perf_tool from event_op2 Jiri Olsa
2018-01-09 15:34 ` [PATCH 02/49] perf tools: Remove perf_tool from event_op3 Jiri Olsa
2018-01-09 15:34 ` [PATCH 03/49] perf tools: Pass struct perf_mmap into auxtrace_mmap__read* functions Jiri Olsa
2018-01-09 15:34 ` [PATCH 04/49] perf tools: Add struct perf_mmap arg into record__write Jiri Olsa
2018-01-09 15:34 ` [PATCH 05/49] perf tools: Use a software dummy event to track task/mmap events Jiri Olsa
2018-01-09 15:34 ` [PATCH 06/49] perf tools: Create separate mmap for dummy tracking event Jiri Olsa
2018-01-09 15:34 ` [PATCH 07/49] perf tools: Extend perf_evlist__mmap_ex() to use track mmap Jiri Olsa
2018-01-09 15:34 ` [PATCH 08/49] perf report: Skip dummy tracking event Jiri Olsa
2018-01-09 15:34 ` [PATCH 09/49] perf tools: Make copyfile_offset global Jiri Olsa
2018-01-09 15:34 ` [PATCH 10/49] perf tools: Add HEADER_DATA_INDEX feature Jiri Olsa
2018-01-09 15:34 ` [PATCH 11/49] perf tools: Handle indexed data file properly Jiri Olsa
2018-01-09 15:34 ` [PATCH 12/49] perf tools: Add perf_data__create_index function Jiri Olsa
2018-01-09 15:34 ` [PATCH 13/49] perf record: Add --index option for building index table Jiri Olsa
2018-01-09 15:34 ` [PATCH 14/49] perf tools: Introduce thread__comm(_str)_by_time() helpers Jiri Olsa
2018-01-09 15:34 ` [PATCH 15/49] perf tools: Add a test case for thread comm handling Jiri Olsa
2018-01-09 15:34 ` [PATCH 16/49] perf tools: Use thread__comm_by_time() when adding hist entries Jiri Olsa
2018-01-09 15:34 ` [PATCH 17/49] perf tools: Convert dead thread list into rbtree Jiri Olsa
2018-01-09 15:34 ` [PATCH 18/49] perf tools: Introduce machine__find*_thread_by_time() Jiri Olsa
2018-01-09 15:34 ` [PATCH 19/49] perf tools: Add thread::exited flag Jiri Olsa
2018-01-09 15:34 ` [PATCH 20/49] perf tools: Add a test case for timed thread handling Jiri Olsa
2018-01-09 15:34 ` [PATCH 21/49] perf tools: Maintain map groups list in a leader thread Jiri Olsa
2018-01-09 15:34 ` [PATCH 22/49] perf tools: Introduce thread__find_addr_location_by_time() and friends Jiri Olsa
2018-01-09 15:34 ` [PATCH 23/49] perf callchain: Use " Jiri Olsa
2018-01-09 15:34 ` [PATCH 24/49] perf tools: Add a test case for timed map groups handling Jiri Olsa
2018-01-09 15:34 ` [PATCH 25/49] perf tools: Save timestamp of a map creation Jiri Olsa
2018-01-09 15:34 ` [PATCH 26/49] perf tools: Introduce map_groups__{insert,find}_by_time() Jiri Olsa
2018-01-09 15:35 ` [PATCH 27/49] perf tools: Use map_groups__find_addr_by_time() Jiri Olsa
2018-01-09 15:35 ` [PATCH 28/49] perf tools: Add testcase for managing maps with time Jiri Olsa
2018-01-09 15:35 ` [PATCH 29/49] perf callchain: Maintain libunwind's address space in map_groups Jiri Olsa
2018-01-09 15:35 ` [PATCH 30/49] perf tools: Rename perf_evlist__munmap_filtered to perf_mmap__put_filtered Jiri Olsa
2018-01-09 15:35 ` [PATCH 31/49] tools lib fd array: Introduce fdarray__add_clone function Jiri Olsa
2018-01-09 15:35 ` [PATCH 32/49] tools lib subcmd: Add OPT_INTEGER_OPTARG|_SET options Jiri Olsa
2018-01-09 15:35 ` [PATCH 33/49] perf tools: Move __perf_session__process_events args into struct Jiri Olsa
2018-01-09 15:35 ` [PATCH 34/49] perf ui progress: Fix index progress display Jiri Olsa
2018-01-09 15:35 ` [PATCH 35/49] perf tools: Add threads debug variable Jiri Olsa
2018-01-09 15:35 ` [PATCH 36/49] perf tools: Add cpu into struct perf_mmap Jiri Olsa
2018-01-09 15:35 ` [PATCH 37/49] perf tools: Add perf_mmap__read_tail function Jiri Olsa
2018-01-09 15:35 ` [PATCH 38/49] perf record: Introduce struct record_thread Jiri Olsa
2018-01-09 15:35 ` [PATCH 39/49] perf record: Read record thread's mmaps Jiri Olsa
2018-01-09 15:35 ` [PATCH 40/49] perf record: Move waking into struct record Jiri Olsa
2018-01-09 15:35 ` [PATCH 41/49] perf record: Move samples into struct record_thread Jiri Olsa
2018-01-09 15:35 ` [PATCH 42/49] perf record: Move bytes_written " Jiri Olsa
2018-01-09 15:35 ` Jiri Olsa [this message]
2018-01-09 15:35 ` [PATCH 44/49] perf record: Wait for all threads being started Jiri Olsa
2018-01-09 15:35 ` [PATCH 45/49] perf record: Add --threads option Jiri Olsa
2018-01-09 15:35 ` [PATCH 46/49] perf record: Add --thread-stats option support Jiri Olsa
2018-01-09 15:35 ` [PATCH 47/49] perf record: Add maps to --thread-stats output Jiri Olsa
2018-01-09 15:35 ` [PATCH 48/49] perf record: Spread maps for --threads option Jiri Olsa
2018-01-09 15:35 ` [PATCH 49/49] perf record: Spread maps for --threads=X option Jiri Olsa
2018-03-07 14:10 ` [RFC 00/49] perf tools: Add threads to record command Jiri Olsa
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