Messages in this thread | | | From | Stephane Eranian <> | Date | Mon, 12 Mar 2018 18:06:54 -0700 | Subject | [BUG] perf record: GROUP_DESC not supported in pipe mode |
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Hi,
I ran into a problem trying to group events in perf record while in pipe mode. If I do:
$ perf record --group -e '{cycles, instructions}' -o - | perf report -i - --group
I do not get the profiles grouped together. Instead I get two profiles.
Looking at the code in util/header.c I see that a bunch of features and not supported in pipe mode (synthesized method). It is not clear to me why. Clearly grouping should be supported. This is a very commonly used mode.
Am I missing something? Thanks.
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