Messages in this thread | | | Subject | Re: [PATCH v8 00/12] perf: enable compression of record mode trace to save storage space | From | Alexey Budankov <> | Date | Fri, 15 Mar 2019 16:43:27 +0300 |
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On 15.03.2019 15:28, Jiri Olsa wrote: > On Thu, Mar 14, 2019 at 02:26:23PM +0300, Alexey Budankov wrote: >> <SNIP> >> The patch set implements runtime trace compression (-z option) in >> record mode and trace auto decompression in report and inject modes. >> Streaming Zstd API [1] is used for compression and decompression of >> data that come from kernel mmaped data buffers. >> <SNIP> >> $ tools/perf/perf record -z -e cycles -- matrix.gcc >> $ tools/perf/perf record --aio -z -e cycles -- matrix.gcc >> $ tools/perf/perf record -z --mmap-flush 1024 -e cycles -- matrix.gcc >> $ tools/perf/perf record --aio -z --mmap-flush 1K -e cycles -- matrix.gcc > > hi, > I'm getting error with -z: > > [root@krava perf]# ./perf record -z ./perf bench sched messaging -l 10000 > # Running 'sched/messaging' benchmark: > # 20 sender and receiver processes per group > # 10 groups == 400 processes run > > Total time: 18.775 [sec] > [ perf record: Woken up 57 times to write data ] > 0x5228 [0]: failed to process type: 81 > [ perf record: Captured and wrote 6.453 MB perf.data, compressed (original 21.486 MB, ratio is 3.340) ]
Reproduced locally. Investigating right now.
tools/perf/perf record -z tools/perf/perf bench sched messaging -l 10000 # Running 'sched/messaging' benchmark: # 20 sender and receiver processes per group # 10 groups == 400 processes run
Total time: 8.799 [sec] [ perf record: Woken up 35 times to write data ] 0x2e48 [0]: failed to process type: 81 [ perf record: Captured and wrote 3.142 MB perf.data, compressed (original 10.241 MB, ratio is 3.272) ]
However it is not observed in my tests on 8 cores Skylake.
tools/perf/perf record -z ../../matrix/linux/matrix.gcc Addr of buf1 = 0x7f2eca1ab010 Offs of buf1 = 0x7f2eca1ab180 Addr of buf2 = 0x7f2ec81aa010 Offs of buf2 = 0x7f2ec81aa1c0 Addr of buf3 = 0x7f2ec61a9010 Offs of buf3 = 0x7f2ec61a9100 Addr of buf4 = 0x7f2ec41a8010 Offs of buf4 = 0x7f2ec41a8140 Threads #: 8 Pthreads Matrix size: 2048 Using multiply kernel: multiply1 Execution time = 30.075 seconds [ perf record: Woken up 127 times to write data ] [ perf record: Captured and wrote 6.820 MB perf.data (953438 samples), compressed (original 36.372 MB, ratio is 5.344) ]
Thanks, Alexey
> > > jirka >
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