Ingo Molnar wrote on Friday, July 29, 2005 4:26 AM > * Chen, Kenneth W <[EMAIL PROTECTED]> wrote: > > To demonstrate the problem, we turned off these two flags in the cpu > > sd domain and measured a stunning 2.15% performance gain! And > > deleting all the code in the try_to_wake_up() pertain to load > > balancing gives us another 0.2% gain. > > another thing: do you have a HT-capable ia64 CPU, and do you have > CONFIG_SCHED_SMT turned on? If yes then could you try to turn off > SD_WAKE_IDLE too, i found it to bring further performance improvements > in certain workloads.
The scheduler experiments done so far are on non-SMT CPU (Madison processor). We have another db setup with multi-thread capable ia64 cpu (montecito, and to be precise, it is SOEMT capable). We are just about to do scheduler experiments on that setup. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
