Messages in this thread | | | Date | Wed, 25 Nov 2015 10:27:28 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH] perf record: Add snapshot mode support for perf's regular events |
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On Tue, Nov 24, 2015 at 10:00:31PM +0800, Yunlong Song wrote: > In our patch, we create and maintain a user space ring buffer to store > perf's tracing info, instead of directly writing to perf.data file as > before. In snapshot mode, only a SIGUSR2 signal can trigger perf to dump > the tracing info currently stored in the user space ring buffer to > perf.data file.
I would very much like to first fix the perf overwrite mode: see lkml.kernel.org/r/20151023151205.GW11639@twins.programming.kicks-ass.net
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