Messages in this thread | | | Subject | Re: [rfc 3/3] perf, x86: P4 PMU -- export ABI part of event config to userspace | From | Peter Zijlstra <> | Date | Wed, 24 Nov 2010 09:32:17 +0100 |
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On Wed, 2010-11-24 at 01:46 +0300, Cyrill Gorcunov wrote: > plain text document attachment (x86-perf-export-abi) > Due to tight 64 bit size of event config field (where we have to track > pretty lot of info during event lifetime) some bits are to be exported > via header into userspace. > > Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> > CC: Lin Ming <ming.m.lin@intel.com> > CC: Stephane Eranian <eranian@google.com> > CC: Peter Zijlstra <peterz@infradead.org> > --- > > Note that I don't like much the idea to export anything into userspace > but it seems there is no other choise. So there is a minimum which should > be exported.
Could you say what exactly is exposed to userspace and why?
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