Hi all, Recently, I used PowerTop to tune an workload power behavior, but found a new interrupt(TLB shootdowns) from its wakeups list as follows:
Top causes for wakeups: 66.2% (1806.2) [ 0] [kernel scheduler] Load balancing tick 16.5% (451.1) [ ] [TLB shootdowns] <kernel IPI> 9.8% (267.7)D [ ] chrome 4.5% (121.5) [ ] [Rescheduling interrupts] <kernel IPI> 1.7% ( 46.9) [ ] [hda_intel] <interrupt> 0.8% ( 23.2) [ ] [i915] <interrupt> 0.0% ( 0.1)D [ 78] btrfs-transacti 0.2% ( 4.9) [ 737] syndaemon 0.1% ( 1.9) [ ] [ahci] <interrupt> There is about 450 TLB shootdowns interrupt per second, so high. .. I searched google for help, but only found what is TLB shootdowns: "A TLB Shootdown occurs when a process restricts access to a page in shared memory and must interrupt processes using that memory space on other processors so they flush their TLB tables" I have no idea whether "TLB shootdowns" interrupt has any impact on power, or even workload's performance. Do anyone have some idea about that? Thanks a lot~~ _______________________________________________ Power mailing list [email protected] http://www.bughost.org/mailman/listinfo/power
