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Date: Wed, 29 Aug 2018 22:01:17 -0700 From: Stephane Eranian <eranian@...gle.com> To: Namhyung Kim <namhyung@...nel.org> Cc: Arnaldo Carvalho de Melo <acme@...nel.org>, LKML <linux-kernel@...r.kernel.org>, Jiri Olsa <jolsa@...nel.org>, Peter Zijlstra <peterz@...radead.org>, kernel-team@....com Subject: Re: [RFC] perf script: callchain handling is not useful On Wed, Aug 29, 2018 at 5:33 PM Namhyung Kim <namhyung@...nel.org> wrote: > > Hi, > > On Wed, Aug 29, 2018 at 08:14:12AM -0700, Stephane Eranian wrote: > > On Wed, Aug 29, 2018 at 6:54 AM Arnaldo Carvalho de Melo > > <acme@...nel.org> wrote: > > > > > > Em Tue, Aug 28, 2018 at 07:41:31PM -0700, Stephane Eranian escreveu: > > > > Hi, > > > > > > > > I am doing the following simple collection with callchain and load profiling: > > > > > > > > $ perf record -g -d -e cpu/event=0xd0,umask=0x81/pp my_test_program > > > > > > > > But when I type: > > > > $ perf script -F ip,addr > > > > ffff9d4821346878 > > > > ffffffff9d58df25 > > > > ffffffff9d58e054 > > > > ffffffff9d5965bb > > > > ffffffff9d640650 > > > > ffffffff9d697d06 > > > > ffffffff9d63ec60 > > > > ffffffff9d640322 > > > > ffffffff9d64070c > > > > ffffffff9d455a60 > > > > 7030c7 > > > > > > > > ffff9d4638ba84a0 > > > > ffffffff9d5df447 > > > > ffffffff9d5eaf4a > > > > ffffffff9d63e165 > > > > ffffffff9d63e439 > > > > ffffffff9d697d98 > > > > ffffffff9d63ec60 > > > > ffffffff9d640322 > > > > ffffffff9d64070c > > > > ffffffff9d455a60 > > > > 7030c7 > > > > I also see the callchain and it is not clear which is the IP. Further > > > > more parsing becomes more difficult because of multiple lines per > > > > sample. I understand that multiline is likely because of > > > > symbolization. But if I don't want symbolization, it should be > > > > possible to print all in one line. > > > > > > Humm, to have this not break possibly existing scripts, perhaps we can > > > have something like: > > > > > > $ perf script -F ip,-callchain,addr > > > > > > ? > > > > > > And if asked explicitely for the callchain, then it gets added in the > > > same line? > > > > > Yeah, that should do it. > > Thanks. > > I found this: > > $ perf script -h |& grep -A1 hide > -G, --hide-call-graph > When printing symbols do not display call chain > Yes, I had found it too. But my problem is twofold: - ip should not include the callchain - callchain should be printed in a single line That would make things easier to parse. > Thanks, > Namhyung
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