From: Jiri Olsa <jolsa@redhat.com>
To: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>, Andi Kleen <ak@linux.intel.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v5 08/10] perf report: implement record trace decompression
Date: Tue, 5 Mar 2019 13:25:29 +0100 [thread overview]
Message-ID: <20190305122529.GA16615@krava> (raw)
In-Reply-To: <16550dfe-d4bf-2445-08df-faf0af0ab1e1@linux.intel.com>
On Fri, Mar 01, 2019 at 07:06:23PM +0300, Alexey Budankov wrote:
SNIP
> +static int __perf_session__process_decomp_events(struct perf_session *session)
> +{
> + s64 skip;
> + u64 size, file_pos = 0;
> + union perf_event *event;
> + struct decomp *decomp = session->decomp_last;
> +
> + if (!decomp)
> + return 0;
> +
> + while (decomp->head < decomp->size && !session_done()) {
> + event = fetch_mmaped_event(session, decomp->head, decomp->size, decomp->data);
> + if (!event)
> + break;
> +
> + size = event->header.size;
> + if (size < sizeof(struct perf_event_header) ||
> + (skip = perf_session__process_event(session, event, file_pos)) < 0) {
> + pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
> + decomp->file_pos + decomp->head, event->header.size, event->header.type);
> + return -EINVAL;
> + }
> +
> + if (skip)
> + size += skip;
> +
> + decomp->head += size;
> + }
> +
> + return 0;
> +}
> +
> /*
> * On 64bit we can mmap the data file in one go. No need for tiny mmap
> * slices. On 32bit we use 32MB.
> @@ -1933,6 +2051,10 @@ reader__process_events(struct reader *rd, struct perf_session *session,
> head += size;
> file_pos += size;
>
> + err = __perf_session__process_decomp_events(session);
> + if (err)
> + goto out;
why don't we process decompressed events directly from the
perf_session__process_compressed_event callback?
there would be no need for 'struct decomp' list logic
jirka
next prev parent reply other threads:[~2019-03-05 12:25 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-01 15:27 [PATCH v5 00/10] perf: enable compression of record mode trace to save storage space Alexey Budankov
2019-03-01 15:41 ` [PATCH v5 02/10] perf record: implement -f,--mmap-flush=<threshold> option Alexey Budankov
2019-03-05 12:25 ` Jiri Olsa
2019-03-07 8:28 ` Alexey Budankov
2019-03-05 12:25 ` Jiri Olsa
2019-03-07 8:28 ` Alexey Budankov
2019-03-05 12:26 ` Jiri Olsa
2019-03-07 8:42 ` Alexey Budankov
2019-03-07 8:54 ` Alexey Budankov
2019-03-01 15:43 ` [PATCH v5 03/10] perf session: define bytes_transferred and bytes_compressed metrics Alexey Budankov
2019-03-05 12:26 ` Jiri Olsa
2019-03-07 8:29 ` Alexey Budankov
2019-03-11 8:19 ` Alexey Budankov
2019-03-11 12:33 ` Jiri Olsa
2019-03-11 13:41 ` Alexey Budankov
2019-03-01 15:46 ` [PATCH v5 04/10] perf record: implement COMPRESSED event record and its attributes Alexey Budankov
2019-03-01 15:52 ` [PATCH v5 06/10] perf util: introduce Zstd based streaming compression API Alexey Budankov
2019-03-05 12:26 ` Jiri Olsa
2019-03-07 8:29 ` Alexey Budankov
2019-03-01 15:58 ` [PATCH v5 07/10] perf record: implement -z,--compression_level=n option and compression Alexey Budankov
2019-03-05 0:01 ` Andi Kleen
2019-03-05 9:19 ` Alexey Budankov
2019-03-05 12:25 ` Jiri Olsa
2019-03-07 8:39 ` Alexey Budankov
2019-03-07 12:14 ` Jiri Olsa
2019-03-07 15:26 ` Alexey Budankov
2019-03-07 15:56 ` Alexey Budankov
2019-03-08 10:46 ` Jiri Olsa
2019-03-10 15:55 ` Alexey Budankov
2019-03-10 16:17 ` Alexey Budankov
2019-03-11 10:56 ` Jiri Olsa
2019-03-05 12:25 ` Jiri Olsa
2019-03-07 8:26 ` Alexey Budankov
2019-03-05 12:26 ` Jiri Olsa
2019-03-07 8:26 ` Alexey Budankov
2019-03-07 11:59 ` Jiri Olsa
2019-03-07 14:51 ` Alexey Budankov
2019-03-05 12:26 ` Jiri Olsa
2019-03-07 8:26 ` Alexey Budankov
2019-03-05 12:26 ` Jiri Olsa
2019-03-07 8:26 ` Alexey Budankov
2019-03-01 16:06 ` [PATCH v5 08/10] perf report: implement record trace decompression Alexey Budankov
2019-03-05 12:25 ` Jiri Olsa [this message]
2019-03-07 8:27 ` Alexey Budankov
2019-03-01 16:07 ` [PATCH v5 09/10] perf inject: enable COMPRESSED records decompression Alexey Budankov
2019-03-05 12:26 ` Jiri Olsa
2019-03-07 8:28 ` Alexey Budankov
2019-03-01 16:09 ` [PATCH v5 10/10] perf tests: implement Zstd comp/decomp integration test Alexey Budankov
2019-03-05 12:25 ` Jiri Olsa
2019-03-07 8:29 ` Alexey Budankov
2019-03-01 16:37 ` [PATCH v5 05/10] perf mmap: implement dedicated memory buffer for data compression Alexey Budankov
2019-03-01 16:38 ` [PATCH v5 01/10] feature: implement libzstd check, LIBZSTD_DIR and NO_LIBZSTD defines Alexey Budankov
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