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authorCyrill Gorcunov <gorcunov@openvz.org>2010-05-12 21:42:42 +0400
committerIngo Molnar <mingo@elte.hu>2010-05-13 08:51:13 +0200
commit720019908fd5a1bb442bb0a35a6027ba21864d25 (patch)
treeb6a637a752f67061403664ec28c5c587c544b01c /tools
parent975fc2d5f20b071576e7c9920c4f1a1eae80f88d (diff)
downloadop-kernel-dev-720019908fd5a1bb442bb0a35a6027ba21864d25.zip
op-kernel-dev-720019908fd5a1bb442bb0a35a6027ba21864d25.tar.gz
x86, perf: P4 PMU -- use hash for p4_get_escr_idx()
Linear search over all p4 MSRs should be fine if only we would not use it in events scheduling routine which is pretty time critical. Lets use hashes. It should speed scheduling up significantly. v2: Steven proposed to use more gentle approach than issue BUG on error, so we use WARN_ONCE now Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> LKML-Reference: <20100512174242.GA5190@lenovo> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools')
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