Messages in this thread | | | Date | Thu, 18 Jun 2015 16:25:17 +0200 | From | Imre Palik <> | Subject | Re: [PATCH v3] perf: honoring the architectural performance monitoring version |
| |
On 06/16/15 11:21, Peter Zijlstra wrote: > On Mon, Jun 15, 2015 at 04:22:32PM +0200, Imre Palik wrote: >> From: "Palik, Imre" <imrep@amazon.de> >> >> Architectural performance monitoring version 1 doesn't support fixed >> counters. Currently, even if a hypervisor advertises support for >> architectural performance monitoring version 1, perf may still tries to use >> the fixed counters, as the constraints are set up based on the CPU model. >> >> This patch ensures that perf honors the architectural performance >> monitoring version returned by CPUID, and it only uses the fixed counters >> for version two and above. >> >> Some of the ideas in this patch are coming from Peter Zijlstra. > > What's the difference from -v2? I'm not really seeing it. >
I made the mistake of sending two different versions as v2. v3 is the same as the second v2.
I sent this to clear up possible confusion. Sorry if it caused more of it.
| |