Messages in this thread | | | Date | Wed, 21 Nov 2018 14:11:47 -0800 | From | Alexei Starovoitov <> | Subject | Re: [PATCH perf,bpf 5/5] perf util: generate bpf_prog_info_event for short living bpf programs |
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On Wed, Nov 21, 2018 at 11:55:02AM -0800, Song Liu wrote: > This patch enables perf-record to listen to bpf_event and generate > bpf_prog_info_event for bpf programs loaded and unloaded during > perf-record run. > > To minimize latency between bpf_event and following bpf calls, separate > mmap with watermark of 1 is created to process these vip events. Then > a separate dummy event is attached to the special mmap. A separate thread > is used to only poll bpf events. > > By default, perf-record will listen to bpf_event. Option no-bpf-event is > added in case the user would opt out.
I think only default perf-record for sampling should include it. perf record -e for tracepoints, kprobes and anything else should imply no-bpf-event.
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