Messages in this thread | | | Date | Sat, 11 Jan 2014 18:19:58 +0800 | From | Fengguang Wu <> | Subject | [sched] 73628fba4: +69% context switches |
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Alex,
FYI, we find much increased interrupts and context switches introduced by commit 73628fba4 ("sched: unify imbalance bias for target group") in your noload branch:
7bea8c18805a5f1 73628fba451ae72221b155696 --------------- ------------------------- 14979 ~ 4% +1304.8% 210434 ~ 1% lkp-ne04/micro/aim7/shell_rtns_1 2748 ~ 5% +977.4% 29607 ~ 0% nhm-white/micro/aim7/shared 17727 +1254.1% 240041 TOTAL interrupts.RES
7bea8c18805a5f1 73628fba451ae72221b155696 --------------- ------------------------- 3617 ~ 0% +69.2% 6118 ~ 0% lkp-ne04/micro/aim7/shell_rtns_1 3617 +69.2% 6118 TOTAL vmstat.system.in
7bea8c18805a5f1 73628fba451ae72221b155696 --------------- ------------------------- 132746 ~ 0% +69.0% 224346 ~ 1% lkp-ne04/micro/aim7/shell_rtns_1 220038 ~ 0% +6.0% 233218 ~ 0% nhm-white/micro/aim7/shared 352785 +29.7% 457564 TOTAL time.involuntary_context_switches
7bea8c18805a5f1 73628fba451ae72221b155696 --------------- ------------------------- 1424581 ~ 0% +8.6% 1546786 ~ 0% lkp-ne04/micro/aim7/shell_rtns_1 1424581 +8.6% 1546786 TOTAL time.voluntary_context_switches
7bea8c18805a5f1 73628fba451ae72221b155696 --------------- ------------------------- 20982 ~ 0% +12.5% 23599 ~ 0% lkp-ne04/micro/aim7/shell_rtns_1 6005 ~ 0% +4.2% 6256 ~ 0% nhm-white/micro/aim7/shared 26988 +10.6% 29856 TOTAL vmstat.system.cs
vmstat.system.cs
24000 ++-------------------------O---------------------------------------+ O O O O O | 23500 ++ O O O O O O O O | | O O O O O O O | 23000 ++ O | | | 22500 ++ | | | 22000 ++ | | | 21500 ++ | | .*.. .*...*..*..*..*..*.. | 21000 *+. .*..*..*. *..*.. .*. *..*..*..*..*..*..* | *. *. | 20500 ++-----------------------------------------------------------------+
time.voluntary_context_switches
1.56e+06 ++----------O-------------O-----------------O-------O-----------+ O O O O O O O O O | 1.54e+06 ++ O O O O O | 1.52e+06 ++ O O O O | | | 1.5e+06 ++ | | | 1.48e+06 ++ | | | 1.46e+06 ++ | 1.44e+06 ++ | | .*. .*.. .*.. | 1.42e+06 *+.*..*..*..*. *..*..*. *..*. *..*..*..*.*..*..*..*..*..* | | 1.4e+06 ++--------------------------------------------------------------+
time.involuntary_context_switches
240000 ++----------------------------------------------------------------+ 230000 ++ O O | O O O O O O O O O O O O | 220000 ++ O O O O O | 210000 ++ O O O | 200000 ++ | 190000 ++ | | | 180000 ++ | 170000 ++ | 160000 ++ | 150000 ++ | | | 140000 ++ .*.. .*..*..*.. .*.. | 130000 *+-*--*--*--*-----*--*--*--*--*--*--*-----------*--*--*-----*--*--*
vmstat.system.in
6500 ++------------------------------------------------------------------+ | O | 6000 O+ O O O O O O O O O O | | O O O O O O O O O O | | | 5500 ++ | | | 5000 ++ | | | 4500 ++ | | | | | 4000 ++ | | ..*.. .*..*..*..| 3500 *+-*--*--*--*--*---*--*--*--*--*--*--*--*--*--*--*------*-----------*
Thanks, Fengguang
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