From: Alexey Budankov <alexey.budankov@linux.intel.com>
To: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
Jiri Olsa <jolsa@redhat.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Andi Kleen <ak@linux.intel.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v1 08/15] perf record: write trace data into mmap trace files
Date: Wed, 14 Oct 2020 15:09:00 +0300 [thread overview]
Message-ID: <81ffefab-ac4e-c51c-809a-b9ba96d6d867@linux.intel.com> (raw)
In-Reply-To: <CAM9d7cgrXsiPWuAYjg1og0N=03-mfx075-n7KUrvYyAMLZ8_7A@mail.gmail.com>
Hi,
On 14.10.2020 13:52, Namhyung Kim wrote:
> Hi,
>
> On Mon, Oct 12, 2020 at 6:01 PM Alexey Budankov
> <alexey.budankov@linux.intel.com> wrote:
>>
>>
>> Write trace data into per mmap trace files located
>> at data directory. Streaming thread adjusts its affinity
>> according to mask of the buffer being processed.
>>
>> Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
>> ---
> [SNIP]
>> @@ -1184,8 +1203,12 @@ static int record__mmap_read_evlist(struct record *rec, struct evlist *evlist,
>> /*
>> * Mark the round finished in case we wrote
>> * at least one event.
>> + *
>> + * No need for round events in directory mode,
>> + * because per-cpu maps and files have data
>> + * sorted by kernel.
>> */
>> - if (bytes_written != rec->bytes_written)
>> + if (!record__threads_enabled(rec) && bytes_written != rec->bytes_written)
>> rc = record__write(rec, NULL, &finished_round_event, sizeof(finished_round_event));
>
> This means it needs to keep all events in the ordered events queue
> when perf report processes the data, right?
Looks so.
Alexei
next prev parent reply other threads:[~2020-10-14 12:09 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-12 8:50 [PATCH v1 00/15] Introduce threaded trace streaming for basic perf record operation Alexey Budankov
2020-10-12 8:53 ` [PATCH v1 01/15] perf session: introduce trace file path to be shown in raw trace dump Alexey Budankov
2020-10-12 8:54 ` [PATCH v1 02/15] perf report: output trace file name " Alexey Budankov
2020-10-12 16:01 ` Andi Kleen
2020-10-12 17:06 ` Alexey Budankov
2020-10-20 16:31 ` Alexey Budankov
2020-10-20 17:10 ` Alexey Budankov
2020-10-20 20:29 ` Andi Kleen
2020-10-13 19:54 ` Jiri Olsa
2020-10-13 21:23 ` Alexey Budankov
2020-10-12 8:55 ` [PATCH v1 03/15] perf data: open data directory in read access mode Alexey Budankov
2020-10-12 16:03 ` Andi Kleen
2020-10-12 16:52 ` Alexey Budankov
2020-10-13 16:22 ` Arnaldo Carvalho de Melo
2020-10-14 10:39 ` Alexey Budankov
2020-10-12 8:56 ` [PATCH v1 04/15] perf session: move reader object definition to header file Alexey Budankov
2020-10-12 8:57 ` [PATCH v1 05/15] perf session: introduce decompressor into trace reader object Alexey Budankov
2020-10-12 16:05 ` Andi Kleen
2020-10-12 16:50 ` Alexey Budankov
2020-10-12 8:58 ` [PATCH v1 06/15] perf session: load data directory into tool process memory Alexey Budankov
2020-10-12 16:09 ` Andi Kleen
2020-10-12 16:49 ` Alexey Budankov
2020-10-13 11:30 ` Alexey Budankov
2020-10-21 6:54 ` Namhyung Kim
2020-10-21 10:25 ` Alexey Budankov
2020-10-21 10:57 ` Namhyung Kim
2020-10-21 13:01 ` Alexey Budankov
2020-10-12 8:59 ` [PATCH v1 07/15] perf record: introduce trace file, compressor and stats in mmap object Alexey Budankov
2020-10-12 9:01 ` [PATCH v1 08/15] perf record: write trace data into mmap trace files Alexey Budankov
2020-10-14 10:52 ` Namhyung Kim
2020-10-14 12:09 ` Alexey Budankov [this message]
2020-10-21 7:34 ` Namhyung Kim
2020-10-21 10:24 ` Alexey Budankov
2020-10-21 10:51 ` Namhyung Kim
2020-10-12 9:02 ` [PATCH v1 09/15] perf record: introduce thread specific objects for trace streaming Alexey Budankov
2020-10-12 9:03 ` [PATCH v1 10/15] perf record: manage thread specific data array Alexey Budankov
2020-10-12 9:05 ` [PATCH v1 11/15] perf evlist: introduce evlist__ctlfd_update() to update ctl fd status Alexey Budankov
2020-10-12 9:05 ` [PATCH v1 12/15] perf record: introduce thread local variable for trace streaming Alexey Budankov
2020-10-12 9:10 ` [PATCH v1 13/15] perf record: stop threads in the end of " Alexey Budankov
2020-10-12 9:11 ` [PATCH v1 14/15] perf record: start threads in the beginning " Alexey Budankov
2020-10-12 9:13 ` [PATCH v1 15/15] perf record: introduce --threads command line option Alexey Budankov
2020-10-13 16:20 ` [PATCH v1 00/15] Introduce threaded trace streaming for basic perf record operation Arnaldo Carvalho de Melo
2020-10-14 12:15 ` Alexey Budankov
2020-10-14 17:27 ` Ingo Molnar
2020-10-15 10:35 ` Alexey Budankov
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