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| author | Peter Zijlstra <[email protected]> | 2009-09-02 13:49:18 +0200 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2009-09-15 16:51:27 +0200 |
| commit | 47fe38fcff0517e67d395c039d2e26d2de688a60 (patch) | |
| tree | ada38f4e1aa644354b9de4c2cb128719e9e64a9e /tools/perf/scripts/python/check-perf-trace.py | |
| parent | 5cbc19a983141729d716be17197028434127b376 (diff) | |
x86: sched: Provide arch implementations using aperf/mperf
APERF/MPERF support for cpu_power.
APERF/MPERF is arch defined to be a relative scale of work capacity
per logical cpu, this is assumed to include SMT and Turbo mode.
APERF/MPERF are specified to both reset to 0 when either counter
wraps, which is highly inconvenient, since that'll give a blimp
when that happens. The manual specifies writing 0 to the counters
after each read, but that's 1) too expensive, and 2) destroys the
possibility of sharing these counters with other users, so we live
with the blimp - the other existing user does too.
Signed-off-by: Peter Zijlstra <[email protected]>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/check-perf-trace.py')
0 files changed, 0 insertions, 0 deletions