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Groups > linux.kernel > #1400603
| From | Wang Nan <wangnan0@huawei.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 03/17] perf tools: Automatically add new channel according to evlist |
| Date | 2016-05-13 10:20 +0200 |
| Message-ID | <ryguf-822-19@gated-at.bofh.it> (permalink) |
| References | <rygaR-7tc-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
perf_evlist__channel_find() can be used to find a proper channel based
on propreties of a evsel. If the channel doesn't exist, it can create
new one for it. After this patch there's no need to create default
channel explicitly.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Signed-off-by: He Kuang <hekuang@huawei.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
---
tools/perf/builtin-record.c | 5 -----
tools/perf/util/evlist.c | 47 ++++++++++++++++++++++++++++++++++++++++-----
2 files changed, 42 insertions(+), 10 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 6e44834..3140378 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -317,11 +317,6 @@ try_again:
}
perf_evlist__channel_reset(evlist);
- rc = perf_evlist__channel_add(evlist, 0, true);
- if (rc < 0)
- goto out;
- rc = 0;
-
if (perf_evlist__mmap_ex(evlist, opts->mmap_pages, false,
opts->auxtrace_mmap_pages,
opts->auxtrace_snapshot_mode) < 0) {
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 6c11b9e..47a8f1f 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1017,6 +1017,43 @@ static int __perf_evlist__mmap(struct perf_evlist *evlist, int idx,
return 0;
}
+static unsigned long
+perf_evlist__channel_for_evsel(struct perf_evsel *evsel __maybe_unused)
+{
+ return 0;
+}
+
+static int
+perf_evlist__channel_find(struct perf_evlist *evlist,
+ struct perf_evsel *evsel,
+ bool add_new)
+{
+ unsigned long flag = perf_evlist__channel_for_evsel(evsel);
+ int i;
+
+ flag |= PERF_EVLIST__CHANNEL_ENABLED;
+ for (i = 0; i < perf_evlist__channel_nr(evlist); i++)
+ if (evlist->channel_flags[i] == flag)
+ return i;
+ if (add_new)
+ return perf_evlist__channel_add(evlist, flag, false);
+ return -ENOENT;
+}
+
+static int
+perf_evlist__channel_complete(struct perf_evlist *evlist)
+{
+ struct perf_evsel *evsel;
+ int err;
+
+ evlist__for_each(evlist, evsel) {
+ err = perf_evlist__channel_find(evlist, evsel, true);
+ if (err < 0)
+ return err;
+ }
+ return 0;
+}
+
static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx,
struct mmap_params *mp, int cpu,
int thread, int *output)
@@ -1244,6 +1281,7 @@ int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages,
bool overwrite, unsigned int auxtrace_pages,
bool auxtrace_overwrite)
{
+ int err;
struct perf_evsel *evsel;
const struct cpu_map *cpus = evlist->cpus;
const struct thread_map *threads = evlist->threads;
@@ -1251,6 +1289,10 @@ int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages,
.prot = PROT_READ | (overwrite ? 0 : PROT_WRITE),
};
+ err = perf_evlist__channel_complete(evlist);
+ if (err)
+ return err;
+
if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0)
return -ENOMEM;
@@ -1281,12 +1323,7 @@ int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages,
int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages,
bool overwrite)
{
- int err;
-
perf_evlist__channel_reset(evlist);
- err = perf_evlist__channel_add(evlist, 0, true);
- if (err < 0)
- return err;
return perf_evlist__mmap_ex(evlist, pages, overwrite, 0, false);
}
--
1.8.3.4
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[PATCH 00/17] perf tools: Support overwritable ring buffer Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:00 +0200
[PATCH 15/17] perf record: Read from backward ring buffer Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:00 +0200
[PATCH 01/17] perf tools: Extract __perf_evlist__mmap_read() Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:00 +0200
Re: [PATCH 01/17] perf tools: Extract __perf_evlist__mmap_read() Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-05-13 15:10 +0200
[PATCH 09/17] perf tools: Detect avalibility of write_backward Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:00 +0200
Re: [PATCH 09/17] perf tools: Detect avalibility of write_backward Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-05-13 15:10 +0200
Re: [PATCH 09/17] perf tools: Detect avalibility of write_backward "Wangnan (F)" <wangnan0@huawei.com> - 2016-05-20 17:40 +0200
Re: [PATCH 09/17] perf tools: Detect avalibility of write_backward Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-05-20 17:40 +0200
[PATCH 05/17] perf record: Prevent reading invalid data in record__mmap_read Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:00 +0200
[PATCH 17/17] perf tools: Don't warn about out of order event if write_backward is used Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:00 +0200
[PATCH 11/17] perf tools: Set write_backward attribut bit for overwrite events Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:00 +0200
[PATCH 04/17] perf tools: Operate multiple channels Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:00 +0200
[PATCH 08/17] perf record: Don't poll on overwrite channel Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:00 +0200
Re: [PATCH 08/17] perf record: Don't poll on overwrite channel Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-05-13 15:20 +0200
Re: [PATCH 08/17] perf record: Don't poll on overwrite channel "Wangnan (F)" <wangnan0@huawei.com> - 2016-05-16 05:20 +0200
[PATCH 16/17] perf record: Toggle overwrite ring buffer for reading Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:00 +0200
[PATCH 10/17] perf tools: Enable overwrite settings Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:00 +0200
Re: [PATCH 10/17] perf tools: Enable overwrite settings Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-05-16 15:40 +0200
[PATCH 07/17] perf record: Don't read from and poll overwrite channel Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:00 +0200
[PATCH 12/17] perf tools: Record fd into perf_mmap Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:00 +0200
[PATCH 13/17] perf tools: Add API to pause a channel Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:00 +0200
[PATCH 14/17] perf record: Rename variable to make code clear Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:10 +0200
[PATCH 02/17] perf tools: Add evlist channel helpers Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:10 +0200
Re: [PATCH 02/17] perf tools: Add evlist channel helpers Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-05-13 15:10 +0200
Re: [PATCH 02/17] perf tools: Add evlist channel helpers "Wangnan (F)" <wangnan0@huawei.com> - 2016-05-18 05:40 +0200
Re: [PATCH 02/17] perf tools: Add evlist channel helpers Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com> - 2016-05-18 15:30 +0200
[PATCH 03/17] perf tools: Automatically add new channel according to evlist Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:20 +0200
[PATCH 06/17] perf tools: Squash overwrite setting into channel Wang Nan <wangnan0@huawei.com> - 2016-05-13 10:20 +0200
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