Messages in this thread | | | Date | Fri, 14 Mar 2014 14:20:43 +0800 | From | Fengguang Wu <> | Subject | [sched] 373e9ec30ad: -11.2% qperf.udp_bw.send_bw.MB_sec |
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Alex, we noticed the below changes on
https://github.com/alexshi/power-scheduling.git single-balance commit 373e9ec30ad1efee2c4ba6b58fc317626e6482d0 ("sched: only do load balance on tick_do_timer_cpu")
test case: lkp-a06/micro/qperf/600s
v3.14-rc6 373e9ec30ad1efee2c4ba6b58 --------------- ------------------------- 273 ~ 0% -11.2% 242 ~ 1% TOTAL qperf.udp_bw.send_bw.MB_sec 268 ~ 0% -9.8% 242 ~ 0% TOTAL qperf.tcp_bw.bw.MB_sec 266 ~ 0% -9.8% 240 ~ 1% TOTAL qperf.udp_bw.recv_bw.MB_sec 48281 ~ 2% -81.3% 9035 ~ 1% TOTAL softirqs.SCHED 1359067 ~ 4% -30.7% 942510 ~ 2% TOTAL interrupts.RES 10201776 ~14% -30.1% 7133067 ~10% TOTAL cpuidle.C3.time 52277488 ~ 4% -26.6% 38366608 ~ 6% TOTAL cpuidle.C2.time 28 ~14% -25.3% 21 ~18% TOTAL cpuidle.POLL.usage 1516 ~16% -27.0% 1107 ~22% TOTAL cpuidle.POLL.time 3955 ~ 7% -24.8% 2972 ~14% TOTAL cpuidle.C3.usage 1.10 ~ 9% -17.0% 0.91 ~16% TOTAL perf-profile.cpu-cycles.menu_select.cpuidle_idle_call.arch_cpu_idle.cpu_startup_entry.start_secondary 9066611 ~ 0% -8.3% 8313872 ~ 1% TOTAL proc-vmstat.pgalloc_dma32 24350865 ~ 0% -8.3% 22328921 ~ 1% TOTAL proc-vmstat.pgfree 15285179 ~ 0% -8.3% 14016032 ~ 1% TOTAL proc-vmstat.pgalloc_normal 2961 ~ 3% -19.7% 2378 ~ 3% TOTAL vmstat.system.in 3887389 ~20% +9.7% 4262549 ~ 0% TOTAL time.voluntary_context_switches 14152 ~ 1% +2.2% 14464 ~ 0% TOTAL vmstat.system.cs
Legend: ~XX% - stddev percent [+-]XX% - change percent
qperf.udp_bw.send_bw.MB_sec
280 ++-------------------------------------------------------------------+ | .*..... | 275 *+...*.....*.... ...*....*.... .. * | 270 ++ *....*.. *. | | | 265 ++ | 260 ++ | | | 255 ++ | 250 ++ O | | | 245 ++ O | 240 O+ O O O O O O O | O O O | 235 ++----------------------------------------O--------------------------+
[*] bisect-good sample [O] bisect-bad sample
Thanks, Fengguang ./qperf ./qperf 127.0.0.1 --time 100 tcp_bw tcp_lat udp_bw udp_lat sctp_bw sctp_lat quit
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