From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wang Nan Subject: [PATCH 44/53] perf tools: Automatically add new channel according to evlist Date: Mon, 11 Jan 2016 13:48:35 +0000 Message-ID: <1452520124-2073-45-git-send-email-wangnan0@huawei.com> References: <1452520124-2073-1-git-send-email-wangnan0@huawei.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , , , , , Wang Nan , He Kuang , "Arnaldo Carvalho de Melo" , Jiri Olsa , Masami Hiramatsu , Namhyung Kim To: Return-path: In-Reply-To: <1452520124-2073-1-git-send-email-wangnan0@huawei.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org 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 Signed-off-by: He Kuang Cc: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Zefan Li 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 21da64d..1f9fb6e 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -356,11 +356,6 @@ 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 ff1beac..5a898be 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -943,6 +943,43 @@ 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) @@ -1162,6 +1199,7 @@ 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; @@ -1169,6 +1207,10 @@ 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; @@ -1199,12 +1241,7 @@ 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