linux-kernel - Re: [PATCH v4 11/12] perf session: load data directory files for analysis

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Date:   Thu, 8 Apr 2021 23:52:52 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     "Bayduraev, Alexey V" <alexey.v.bayduraev@...ux.intel.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Alexei Budankov <abudankov@...wei.com>,
        Alexander Antonov <alexander.antonov@...ux.intel.com>
Subject: Re: [PATCH v4 11/12] perf session: load data directory files for
 analysis

On Tue, Apr 06, 2021 at 11:52:32AM +0300, Bayduraev, Alexey V wrote:
> 
> Introduce decompressor into trace reader object so that decompression
> could be executed on per data file basis separately for every data
> file located in data directory.
> 
> Load data directory files and provide basic raw dump and aggregated
> analysis support of data directories in report mode, still with no
> memory consumption optimizations.
> 
> Design and implementation are based on the prototype [1], [2].
> 
> [1] git clone https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git -b perf/record_threads
> [2] https://lore.kernel.org/lkml/20180913125450.21342-1-jolsa@kernel.org/
> 
> Suggested-by: Jiri Olsa <jolsa@...nel.org>
> Signed-off-by: Alexey Bayduraev <alexey.v.bayduraev@...ux.intel.com>

hi,
this and following patch seem to squash several changes from
perf/record_threads:

	21289ea28f2f perf session: Add reader return codes
	44d19279d0e9 perf session: Add eof flag to reader state
	490cece1ff49 perf session: Add reader__read_event function
	ff9d91751367 perf session: Move head/file_offset computation into reader__mmap function
	75a6af52ecae perf session: Move unmap into reader__mmap function
	e1fc76225518 perf session: Add reader__mmap function
	f7f0473104cd perf session: Add reader__init function
	262c08cb7332 perf session: Move head in reader_state
	fd91847190f0 perf session: Move data_size in reader_state
	dcb49769bdde perf session: Move file_offset in reader_state
	69c7f9557e83 perf session: Move file_pos in reader_state
	c5c5c03f09f9 perf session: Add mmap_cur to reader_state
	faf7b7176f2a perf session: Move mmap_idx in reader_state
	42504d97a18f perf session: Move mmap_size in reader_state
	7bf7ccdabc84 perf session: Move mmaps in reader_state
	fc1eb45de565 perf session: Add path to reader object

making this a really big change of important code, which can't
be easily reviewed.. that's why I split it in the first place ;-)

I think we need to bring this code first with incremental changes

jirka