Messages in this thread Patch in this message | | | Date | Fri, 28 Jul 2017 11:25:50 +0200 | From | Jiri Olsa <> | Subject | Re: [PATCH 1/3] perf tools: Add callchain to ctf conversion |
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On Thu, Jul 27, 2017 at 02:12:03PM -0400, Geneviève Bastien wrote: > The field perf_callchain, if available, is added to the sampling > events during the CTF conversion. It is an array of u64 values. > The perf_callchain_size field contains the size of the array. > > It will allow the analysis of sampling data in trace visualization tools > like Trace Compass. Possible analyses with those data: dynamic > flamegraphs, correlation with other tracing data like a userspace trace. > > Here follows a babeltrace CTF output of a trace with callchain: > > $ babeltrace ./myctftrace > [17:38:45.672760285] (+?.?????????) cycles:ppp: { cpu_id = 0 }, { perf_ip = 0xFFFFFFFF81063EE4, perf_tid = 25841, perf_pid = 25774, perf_period = 1, perf_callchain_size = 7, perf_callchain = [ [0] = 0xFFFFFFFFFFFFFF80, [1] = 0xFFFFFFFF81063EE4, [2] = 0xFFFFFFFF8100C770, [3] = 0xFFFFFFFF81006EC6, [4] = 0xFFFFFFFF8118245E, [5] = 0xFFFFFFFF810A9224, [6] = 0xFFFFFFFF8164A4C6 ] } > [17:38:45.672777672] (+0.000017387) cycles:ppp: { cpu_id = 0 }, { perf_ip = 0xFFFFFFFF81063EE4, perf_tid = 25841, perf_pid = 25774, perf_period = 1, perf_callchain_size = 8, perf_callchain = [ [0] = 0xFFFFFFFFFFFFFF80, [1] = 0xFFFFFFFF81063EE4, [2] = 0xFFFFFFFF8100C770, [3] = 0xFFFFFFFF81006EC6, [4] = 0xFFFFFFFF8118245E, [5] = 0xFFFFFFFF810A9224, [6] = 0xFFFFFFFF8164A4C6, [7] = 0xFFFFFFFF8164ABAD ] } > [17:38:45.672786700] (+0.000009028) cycles:ppp: { cpu_id = 0 }, { perf_ip = 0xFFFFFFFF81063EE4, perf_tid = 25841, perf_pid = 25774, perf_period = 70, perf_callchain_size = 3, perf_callchain = [ [0] = 0xFFFFFFFFFFFFFF80, [1] = 0xFFFFFFFF81063EE4, [2] = 0xFFFFFFFF8100C770 ] }
missing one more hunk (attached) ;-)
I guess there's no need to resend, Arnaldo could remove it, anyway for patchset:
Acked-by: Jiri Olsa <jolsa@kernel.org>
Is there already tracecompas change to display callchains and mmaps?
thanks, jirka
--- diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c index c47b0943ef88..2346cecb8ea2 100644 --- a/tools/perf/util/data-convert-bt.c +++ b/tools/perf/util/data-convert-bt.c @@ -596,7 +596,6 @@ static int add_generic_values(struct ctf_writer *cw, * PERF_SAMPLE_TIME - not needed as we have it in * ctf event header * PERF_SAMPLE_READ - TODO - * PERF_SAMPLE_CALLCHAIN - TODO * PERF_SAMPLE_RAW - tracepoint fields are handled separately * PERF_SAMPLE_BRANCH_STACK - TODO * PERF_SAMPLE_REGS_USER - TODO
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