[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <1466586531-89751-4-git-send-email-wangnan0@huawei.com>
Date: Wed, 22 Jun 2016 09:08:46 +0000
From: Wang Nan <wangnan0@...wei.com>
To: <acme@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <pi3orama@....com>,
Wang Nan <wangnan0@...wei.com>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Jiri Olsa <jolsa@...nel.org>,
Masami Hiramatsu <mhiramat@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Zefan Li <lizefan@...wei.com>, He Kuang <hekuang@...wei.com>
Subject: [PATCH v9 3/8] perf record: Extract perf_evlist__mmap_ex() processing to a new function
Create record__mmap() and record__mmap_evlist() to wrap
perf_evlist__mmap_ex() and its error processing.
Following commits will introdule multiple evlists for 'perf record'.
record__mmap() and record__mmap_evlist() will be improvemented to
create mmap for each evlist.
Signed-off-by: Wang Nan <wangnan0@...wei.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Zefan Li <lizefan@...wei.com>
Cc: He Kuang <hekuang@...wei.com>
---
tools/perf/builtin-record.c | 56 +++++++++++++++++++++++++++++----------------
1 file changed, 36 insertions(+), 20 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index b1304eb..7998ec3 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -341,6 +341,40 @@ int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused)
#endif
+static int record__mmap_evlist(struct record *rec,
+ struct perf_evlist *evlist)
+{
+ struct record_opts *opts = &rec->opts;
+ char msg[512];
+
+ if (perf_evlist__mmap_ex(evlist, opts->mmap_pages, false,
+ opts->auxtrace_mmap_pages,
+ opts->auxtrace_snapshot_mode) < 0) {
+ if (errno == EPERM) {
+ pr_err("Permission error mapping pages.\n"
+ "Consider increasing "
+ "/proc/sys/kernel/perf_event_mlock_kb,\n"
+ "or try again with a smaller value of -m/--mmap_pages.\n"
+ "(current value: %u,%u)\n",
+ opts->mmap_pages, opts->auxtrace_mmap_pages);
+ return -errno;
+ } else {
+ pr_err("failed to mmap with %d (%s)\n", errno,
+ strerror_r(errno, msg, sizeof(msg)));
+ if (errno)
+ return -errno;
+ else
+ return -EINVAL;
+ }
+ }
+ return 0;
+}
+
+static int record__mmap(struct record *rec)
+{
+ return record__mmap_evlist(rec, rec->evlist);
+}
+
static int record__open(struct record *rec)
{
char msg[512];
@@ -377,27 +411,9 @@ try_again:
goto out;
}
- if (perf_evlist__mmap_ex(evlist, opts->mmap_pages, false,
- opts->auxtrace_mmap_pages,
- opts->auxtrace_snapshot_mode) < 0) {
- if (errno == EPERM) {
- pr_err("Permission error mapping pages.\n"
- "Consider increasing "
- "/proc/sys/kernel/perf_event_mlock_kb,\n"
- "or try again with a smaller value of -m/--mmap_pages.\n"
- "(current value: %u,%u)\n",
- opts->mmap_pages, opts->auxtrace_mmap_pages);
- rc = -errno;
- } else {
- pr_err("failed to mmap with %d (%s)\n", errno,
- strerror_r(errno, msg, sizeof(msg)));
- if (errno)
- rc = -errno;
- else
- rc = -EINVAL;
- }
+ rc = record__mmap(rec);
+ if (rc)
goto out;
- }
session->evlist = evlist;
perf_session__set_id_hdr_size(session);
--
1.8.3.4
Powered by blists - more mailing lists