Messages in this thread | | | Subject | Re: [PATCH 11/16] perf intel-pt: Add support for synthesizing callchains for regular events | From | Adrian Hunter <> | Date | Fri, 17 Apr 2020 16:50:00 +0300 |
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On 16/04/20 6:14 pm, Arnaldo Carvalho de Melo wrote: > Em Wed, Apr 01, 2020 at 01:16:08PM +0300, Adrian Hunter escreveu: >> Currently, callchains can be synthesized only for synthesized events. >> Support also synthesizing callchains for regular events. > > This is super cool, I wonder if we shouldn't do it automatically or just > adding a new type of callchains, i.e.: > > perf record --call-graph pt uname > > Should take care of all the details, i.e. do the extra steps below > behind the scenes. > > Possibly even find out that the workload specified was built with > -fomit-frame-pointers, that the hardware has Intel PT and do all behind > the scenes for: > > perf record -g uname > > Alternatively we could take some less seemingly far fetched approach and > make this configurable via: > > perf config call-graph.record-mode=pt > > What do you think?
Adding a --call-graph option sounds reasonable, and config to define default callgraph options. But this was done at Andi Kleen's request, so he may want to comment.
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