Messages in this thread |  | | | From | Andi Kleen <> | | Subject | Re: [PATCH 3/4] perf, x86: Use ALTERNATIVE() to check for X86_FEATURE_PERFCTR_CORE | | Date | Mon, 18 Apr 2011 13:00:57 -0700 |
| |
Robert Richter <robert.richter@amd.com> writes:
> Using ALTERNATIVE() when checking for X86_FEATURE_PERFCTR_CORE avoids > an extra pointer chase and data cache hit.
Is that really a performance critical path?
Seems more like unnecessary obfuscation to me.
-Andi
-- ak@linux.intel.com -- Speaking for myself only
|  |