Messages in this thread | | | Subject | Re: [PATCH v10 09/12] perf record: implement -z,--compression_level[=<n>] option | From | Alexey Budankov <> | Date | Wed, 15 May 2019 11:43:30 +0300 |
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On 15.05.2019 0:46, Arnaldo Carvalho de Melo wrote: > Em Tue, May 14, 2019 at 05:20:41PM -0300, Arnaldo Carvalho de Melo escreveu: >> Em Mon, Mar 18, 2019 at 08:44:42PM +0300, Alexey Budankov escreveu: >>> >>> Implemented -z,--compression_level[=<n>] option that enables compression >>> of mmaped kernel data buffers content in runtime during perf record >>> mode collection. Default option value is 1 (fastest compression). > > <SNIP> > >> [root@quaco ~]# perf record -z2 >> ^C[ perf record: Woken up 1 times to write data ] >> 0x1746e0 [0x76]: failed to process type: 81 [Invalid argument] >> [ perf record: Captured and wrote 1.568 MB perf.data, compressed (original 0.452 MB, ratio is 3.995) ] >> >> [root@quaco ~]# > > So, its the buildid processing at the end, so we can't do build-id > processing when using PERF_RECORD_COMPRESSED, otherwise we'd have to > uncompress at the end to find the PERF_RECORD_FORK/PERF_RECORD_MMAP, > etc. > > [root@quaco ~]# perf record -z2 --no-buildid sleep 1 > [ perf record: Woken up 1 times to write data ] > [ perf record: Captured and wrote 0.020 MB perf.data, compressed (original 0.001 MB, ratio is 2.153) ] > [root@quaco ~]# perf report -D | grep PERF_RECORD_COMP > 0x4f40 [0x195]: failed to process type: 81 [Invalid argument] > Error: > failed to process sample > 0 0x4f40 [0x195]: PERF_RECORD_COMPRESSED > [root@quaco ~]# > > I'll play with it tomorrow.
Applied the whole patch set on top of the current perf/core and the whole thing functions as expected.
~Alexey
> > - Arnaldo > >> I've pushed what I have to the tmp.perf/core branch, please try to see >> if I made any mistake in fixing up conflicts with BPF_PROG_INFO and >> BPF_BTF header features. I'll continue tomorrow with 10-12/12. >
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