From: Arnaldo Carvalho de Melo <acme@redhat.com>
To: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@kernel.org>,
Brendan Gregg <brendan.d.gregg@gmail.com>,
Daniel Borkmann <daniel@iogearbox.net>,
"David S. Miller" <davem@davemloft.net>,
He Kuang <hekuang@huawei.com>, Jiri Olsa <jolsa@kernel.org>,
Li Zefan <lizefan@huawei.com>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Namhyung Kim <namhyung@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
pi3orama@163.com, Will Deacon <will.deacon@arm.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 28/54] perf record: Extract synthesize code to record__synthesize()
Date: Fri, 29 Jan 2016 18:37:43 -0200 [thread overview]
Message-ID: <20160129203743.GA4941@redhat.com> (raw)
In-Reply-To: <1453715801-7732-29-git-send-email-wangnan0@huawei.com>
Em Mon, Jan 25, 2016 at 09:56:15AM +0000, Wang Nan escreveu:
> diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
>
> +static int record__synthesize(struct record *rec)
> +{
> + struct perf_session *session = rec->session;
> + struct machine *machine = &session->machines.host;
> + struct perf_data_file *file = &rec->file;
> + struct record_opts *opts = &rec->opts;
> + struct perf_tool *tool = &rec->tool;
> + int fd = perf_data_file__fd(file);
> + int err = 0;
> + static bool warned_kmaps = false, warned_modules = false;
snip
> + err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
> + machine);
> + if (err < 0 && !warned_kmaps) {
Please use WARN_ONCE, there are lots of examples in tools/perf and in
the kernel proper, from where this idiom was adopted, this way these
static variables will be auto-created.
- Arnaldo
> + warned_kmaps = true;
> + pr_err("Couldn't record kernel reference relocation symbol\n"
> + "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
> + "Check /proc/kallsyms permission or run as root.\n");
> + }
> +
> + err = perf_event__synthesize_modules(tool, process_synthesized_event,
> + machine);
> + if (err < 0 && !warned_modules) {
> + warned_modules = true;
> + pr_err("Couldn't record kernel module information.\n"
> + "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
> + "Check /proc/modules permission or run as root.\n");
next prev parent reply other threads:[~2016-01-29 20:37 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-25 9:55 [GIT PULL 00/54] perf tools: Bugfix, BPF improvements and overwrite ring buffer support Wang Nan
2016-01-25 9:55 ` [PATCH 01/54] perf test: Add libbpf relocation checker Wang Nan
2016-01-26 14:58 ` Arnaldo Carvalho de Melo
2016-01-26 15:07 ` Arnaldo Carvalho de Melo
2016-02-03 10:13 ` [tip:perf/core] " tip-bot for Wang Nan
2016-01-25 9:55 ` [PATCH 02/54] perf bpf: Check relocation target section Wang Nan
2016-02-03 10:14 ` [tip:perf/core] " tip-bot for Wang Nan
2016-01-25 9:55 ` [PATCH 03/54] tools build: Allow subprojects select all feature checkers Wang Nan
2016-02-03 10:14 ` [tip:perf/core] " tip-bot for Wang Nan
2016-01-25 9:55 ` [PATCH 04/54] perf build: Select all feature checkers for feature-dump Wang Nan
2016-02-03 10:14 ` [tip:perf/core] " tip-bot for Wang Nan
2016-01-25 9:55 ` [PATCH 05/54] perf build: Use feature dump file for build-test Wang Nan
2016-01-26 16:59 ` Arnaldo Carvalho de Melo
2016-01-27 2:36 ` Wangnan (F)
2016-01-27 13:54 ` Arnaldo Carvalho de Melo
2016-01-27 11:22 ` [PATCH] tools build: Check basic headers for test-compile feature checker Wang Nan
2016-01-27 13:23 ` Jiri Olsa
2016-01-27 13:55 ` Arnaldo Carvalho de Melo
2016-02-03 10:15 ` [tip:perf/core] " tip-bot for Wang Nan
2016-01-25 9:55 ` [PATCH 06/54] perf test: Check environment before start real BPF test Wang Nan
2016-02-03 10:18 ` [tip:perf/core] " tip-bot for Wang Nan
2016-01-25 9:55 ` [PATCH 07/54] perf tools: Fix symbols searching for offline module in buildid-cache Wang Nan
2016-01-25 9:55 ` [PATCH 08/54] perf test: Improve bp_signal Wang Nan
2016-02-03 10:18 ` [tip:perf/core] " tip-bot for Wang Nan
2016-01-25 9:55 ` [PATCH 09/54] perf tools: Add API to config maps in bpf object Wang Nan
2016-02-03 23:29 ` Arnaldo Carvalho de Melo
2016-02-04 12:59 ` Wangnan (F)
2016-01-25 9:55 ` [PATCH 10/54] perf tools: Enable BPF object configure syntax Wang Nan
2016-01-25 9:55 ` [PATCH 11/54] perf record: Apply config to BPF objects before recording Wang Nan
2016-01-25 9:55 ` [PATCH 12/54] perf tools: Enable passing event to BPF object Wang Nan
2016-01-25 9:56 ` [PATCH 13/54] perf tools: Support perf event alias name Wang Nan
2016-02-03 23:35 ` Arnaldo Carvalho de Melo
2016-01-25 9:56 ` [PATCH 14/54] perf tools: Support setting different slots in a BPF map separately Wang Nan
2016-01-25 9:56 ` [PATCH 15/54] perf tools: Enable indices setting syntax for BPF maps Wang Nan
2016-01-25 9:56 ` [PATCH 16/54] perf tools: Introduce bpf-output event Wang Nan
2016-01-25 9:56 ` [PATCH 17/54] perf data: Support converting data from bpf_perf_event_output() Wang Nan
2016-01-25 9:56 ` [PATCH 18/54] perf core: Introduce new ioctl options to pause and resume ring buffer Wang Nan
2016-01-25 9:56 ` [PATCH 19/54] perf core: Set event's default overflow_handler Wang Nan
2016-01-25 9:56 ` [PATCH 20/54] perf core: Prepare writing into ring buffer from end Wang Nan
2016-01-25 9:56 ` [PATCH 21/54] perf core: Add backward attribute to perf event Wang Nan
2016-01-25 9:56 ` [PATCH 22/54] perf core: Reduce perf event output overhead by new overflow handler Wang Nan
2016-01-25 9:56 ` [PATCH 23/54] perf tools: Introduce API to pause ring buffer Wang Nan
2016-01-25 9:56 ` [PATCH 24/54] perf tools: Only validate is_pos for tracking evsels Wang Nan
2016-01-25 9:56 ` [PATCH 25/54] perf tools: Print write_backward value in perf_event_attr__fprintf Wang Nan
2016-01-25 9:56 ` [PATCH 26/54] perf tools: Move timestamp creation to util Wang Nan
2016-02-03 10:18 ` [tip:perf/core] " tip-bot for Wang Nan
2016-01-25 9:56 ` [PATCH 27/54] perf tools: Make ordered_events reusable Wang Nan
2016-01-25 9:56 ` [PATCH 28/54] perf record: Extract synthesize code to record__synthesize() Wang Nan
2016-01-29 20:37 ` Arnaldo Carvalho de Melo [this message]
2016-01-25 9:56 ` [PATCH 29/54] perf tools: Add perf_data_file__switch() helper Wang Nan
2016-01-25 9:56 ` [PATCH 30/54] perf record: Turns auxtrace_snapshot_enable into 3 states Wang Nan
2016-01-25 9:56 ` [PATCH 31/54] perf record: Introduce record__finish_output() to finish a perf.data Wang Nan
2016-01-25 9:56 ` [PATCH 32/54] perf record: Use OPT_BOOLEAN_SET for buildid cache related options Wang Nan
2016-02-03 10:19 ` [tip:perf/core] " tip-bot for Wang Nan
2016-01-25 9:56 ` [PATCH 33/54] perf record: Add '--timestamp-filename' option to append timestamp to output filename Wang Nan
2016-01-25 9:56 ` [PATCH 34/54] perf record: Split output into multiple files via '--switch-output' Wang Nan
2016-01-25 9:56 ` [PATCH 35/54] perf record: Force enable --timestamp-filename when --switch-output is provided Wang Nan
2016-01-25 9:56 ` [PATCH 36/54] perf record: Disable buildid cache options by default in switch output mode Wang Nan
2016-01-25 9:56 ` [PATCH 37/54] perf record: Re-synthesize tracking events after output switching Wang Nan
2016-01-25 9:56 ` [PATCH 38/54] perf record: Generate tracking events for process forked by perf Wang Nan
2016-01-25 9:56 ` [PATCH 39/54] perf record: Ensure return non-zero rc when mmap fail Wang Nan
2016-01-25 9:56 ` [PATCH 40/54] perf record: Prevent reading invalid data in record__mmap_read Wang Nan
2016-01-25 9:56 ` [PATCH 41/54] perf tools: Add evlist channel helpers Wang Nan
2016-01-25 9:56 ` [PATCH 42/54] perf tools: Automatically add new channel according to evlist Wang Nan
2016-01-25 9:56 ` [PATCH 43/54] perf tools: Operate multiple channels Wang Nan
2016-01-25 9:56 ` [PATCH 44/54] perf tools: Squash overwrite setting into channel Wang Nan
2016-01-25 9:56 ` [PATCH 45/54] perf record: Don't read from and poll overwrite channel Wang Nan
2016-01-25 9:56 ` [PATCH 46/54] perf record: Don't poll on " Wang Nan
2016-01-25 9:56 ` [PATCH 47/54] perf tools: Detect avalibility of write_backward Wang Nan
2016-01-25 9:56 ` [PATCH 48/54] perf tools: Enable overwrite settings Wang Nan
2016-01-25 9:56 ` [PATCH 49/54] perf tools: Set write_backward attribut bit for overwrite events Wang Nan
2016-01-25 9:56 ` [PATCH 50/54] perf record: Toggle overwrite ring buffer for reading Wang Nan
2016-01-26 8:25 ` Wangnan (F)
2016-01-25 9:56 ` [PATCH 51/54] perf record: Rename variable to make code clear Wang Nan
2016-01-25 9:56 ` [PATCH 52/54] perf record: Read from backward ring buffer Wang Nan
2016-01-25 9:56 ` [PATCH 53/54] perf record: Allow generate tracking events at the end of output Wang Nan
2016-01-25 9:56 ` [PATCH 54/54] perf tools: Don't warn about out of order event if write_backward is used Wang Nan
2016-01-26 9:11 ` [offlist] Re: [GIT PULL 00/54] perf tools: Bugfix, BPF improvements and overwrite ring buffer support Wangnan (F)
2016-01-26 14:11 ` Arnaldo Carvalho de Melo
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