Hello,
I collected lockstat statistics when CPU idle is less 10, see below:
Profiling interrupt: 120600 events in 5.038 seconds (23940 events/sec)
Count indv cuml rcnt nsec CPU+PIL Caller
-------------------------------------------------------------------------------
3430 3% 3% 0.00 1225 cpu[3]+11 disp_getwork
3378 3% 6% 0.00 1429 cpu[512]+11 disp_getwork
3319 3% 8% 0.00 1254 cpu[515]+11 disp_getwork
........
1407 1% 61% 0.00 1238 cpu[11] (usermode)
972 1% 62% 0.00 2664 cpu[18] (usermode)
953 1% 63% 0.00 833 cpu[528] (usermode)
question:
1. what is disp_getwork ? I guess this function comes from "shced"
? if trace "sched" procss functions,
say 5 seconds, what is overhead of performance?
2. caller = (usermode), what is usermode mean here ? why did it not
trace out the functions ?
Thanks,
James Yang
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