Messages in this thread | | | Date | Fri, 08 Jun 2012 11:13:27 -0600 | From | David Ahern <> | Subject | Re: Does perf inject preserve call chain data? |
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On 6/8/12 10:44 AM, Tim Chen wrote: > On Fri, 2012-06-08 at 11:38 -0300, Arnaldo Carvalho de Melo wrote: >> Em Tue, May 22, 2012 at 03:58:40PM -0600, David Ahern escreveu: >>> On 5/22/12 12:49 PM, Tim Chen wrote: >>>> Arnaldo, >>>> >>>> Wonder if perf inject munged the call chain data from perf record? >>>> >>>> When I do >>>> perf record -a -g -o - sleep 5 |perf inject -v -b | perf report -g -i - >>>> I get a complain from perf report >>>> >>>> Warning: >>>> Selected -g but no callchain data. Did you call 'perf record' without -g? >>>> >>> >>> I believe the root cause is that the event list is not written to >>> the pipe. Using Arnaldo's git repo as of today (has fixes from >>> Stephane) this hack shows the info is there and can be processed. >> >> How things stand here? Tim, did this fix things for you? If so, David, >> please resend with a proper subject line and a Tested-by: Tim, ok? >> >> Thanks, >> >> - Arnaldo >> > > It didn't fix things for me when I was testing on a westmere-ex machine. > I got > > # ./perf record -a -g -o - sleep 5 |perf inject -v -b | perf report -g -i - > incompatible file format > incompatible file formatincompatible file formatselected -g but no callchain data. Did you call perf record without -g? > > Testing was done on 3.5.0-rc1.
Is ./ needed in front of the second and third invocations are do you have ./ in the PATH?
David
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