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Groups > linux.kernel > #1252874
| From | Andi Kleen <andi@firstfloor.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 1/5] x86, perf: Fix LBR call stack save/restore |
| Date | 2015-10-21 16:40 +0200 |
| Message-ID | <qm2Iz-5OI-31@gated-at.bofh.it> (permalink) |
| References | <qlK8W-3Ji-9@gated-at.bofh.it> <qm1t9-43q-29@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
> Any idea who much more expensive that wrmsr() is compared to the rdmsr() > it replaces? I don't know. > > If its significant we could think about having this behaviour depend on > callstacks. This function is only used for callstacks, otherwise it uses the LBR reset path. -Andi -- ak@linux.intel.com -- Speaking for myself only. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH 1/5] x86, perf: Fix LBR call stack save/restore Andi Kleen <andi@firstfloor.org> - 2015-10-20 20:50 +0200
[PATCH 5/5] x86, perf: Avoid context switching LBR_INFO when not needed Andi Kleen <andi@firstfloor.org> - 2015-10-20 20:50 +0200
Re: [PATCH 5/5] x86, perf: Avoid context switching LBR_INFO when not needed Peter Zijlstra <peterz@infradead.org> - 2015-10-21 15:50 +0200
[PATCH 3/5] perf, tools: Disable branch flags/cycles for --callgraph lbr Andi Kleen <andi@firstfloor.org> - 2015-10-20 21:00 +0200
Re: [PATCH 3/5] perf, tools: Disable branch flags/cycles for --callgraph lbr Peter Zijlstra <peterz@infradead.org> - 2015-10-21 15:30 +0200
Re: [PATCH 3/5] perf, tools: Disable branch flags/cycles for --callgraph lbr Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-10-21 20:10 +0200
Re: [PATCH 1/5] x86, perf: Fix LBR call stack save/restore Peter Zijlstra <peterz@infradead.org> - 2015-10-21 15:20 +0200
Re: [PATCH 1/5] x86, perf: Fix LBR call stack save/restore Andi Kleen <andi@firstfloor.org> - 2015-10-21 16:40 +0200
Re: [PATCH 1/5] x86, perf: Fix LBR call stack save/restore Ingo Molnar <mingo@kernel.org> - 2015-10-21 18:30 +0200
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