Messages in this thread | | | Subject | Re: sched: Avoid SMT siblings in select_idle_sibling() if possible | From | Mike Galbraith <> | Date | Thu, 23 Feb 2012 12:21:04 +0100 |
| |
On Thu, 2012-02-23 at 16:19 +0530, Srivatsa Vaddagiri wrote:
> I am seeing 2.6% _improvement_ in volanomark score by enabling SD_BALANCE_WAKE > at SMT/MC domains.
That's an unexpected (but welcome) result.
> Machine : 2 Quad-core Intel X5570 CPU (H/T enabled) > Kernel : tip (HEAD at 6241cc8) > Java : OpenJDK 1.6.0_20 > Volano : 2_9_0 > > Volano benchmark was run 4 times with and w/o SD_BALANCE_WAKE enabled in > SMT/MC domains. > > Average score std. dev > > SD_BALANCE_WAKE disabled 369459.750 4825.046 > SD_BALANCE_WAKE enabled 379070.500 379070.5 > > I am going to try pipe benchmark next. Do you have suggestions for any other > benchmarks I should try to see the effect of SD_BALANCE_WAKE turned on in > SMT/MC domains?
Unpinned netperf TCP_RR and/or tbench pairs? Anything that's wakeup heavy should tell the tail.
-Mike
| |