On Mon, Feb 11, 2019 at 11:23:40PM +0300, Alexey Budankov wrote: > > Compression is implemented using simple Zstd API and employs AIO data > buffer as the memory to operate on. If the API call fails for some > reason compression falls back to memcpy(). > > Data chunks are split and packed into PERF_RECORD_COMPRESSED records > by 64KB at max. mmap-flush option value can be used to avoid compression > of every single byte of data and increase compression ratio. > > Signed-off-by: Alexey Budankov <alexey.budan...@linux.intel.com> > --- > Changes in v2: > - enabled trace compression for serial trace streaming > - moved compression/decompression code to session layer > > --- > tools/perf/builtin-record.c | 67 +++++++++----- > tools/perf/util/mmap.c | 173 +++++++++++++++++++++--------------- > tools/perf/util/mmap.h | 24 +++-- > tools/perf/util/session.c | 106 ++++++++++++++++++++++ > tools/perf/util/session.h | 13 +++ > 5 files changed, 280 insertions(+), 103 deletions(-) > > diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c > index 227dbbd47d3f..435ff88dfc5e 100644 > --- a/tools/perf/builtin-record.c > +++ b/tools/perf/builtin-record.c > @@ -112,8 +112,7 @@ static bool switch_output_time(struct record *rec) > trigger_is_ready(&switch_output_trigger); > } > > -static int record__write(struct record *rec, struct perf_mmap *map > __maybe_unused, > - void *bf, size_t size) > +static int record__write(struct record *rec, void *bf, size_t size)
please keep the 'struct perf_mmap *map' in, I'm using it in the multiple file storage, where each map holds pointer to its data file thanks, jirka
