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2022-06-27 - 17:01

x86 Intel Core i7-2600K @3400 MHz, Linux 5.15.7-rt23 (Profile)

Latency plot of system in rack #4, slot #6
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h200 -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack4slot6.osadl.org (updated Fri Dec 24, 2021 02:27:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8059521280,0pltrace0-21swapper/322:56:463
3152921260,0sleep10-21swapper/122:10:241
2927221220,0sleep30-21swapper/323:20:203
30866521200,110pltrace0-21swapper/319:05:143
1265521030,94pltrace0-21swapper/519:10:015
3086652980,88pltrace0-21swapper/719:05:217
126552900,86pltrace0-21swapper/119:06:481
119328368,10sleep20-21swapper/219:05:592
128727661,10sleep40-21swapper/419:06:574
3178352730,1pltrace44-21ksoftirqd/420:56:454
1390752730,0pltrace0-21swapper/321:16:453
787852720,0pltrace0-21swapper/500:06:465
979752700,2pltrace9802-21pltrace-run21:46:462
122726954,10sleep00-21swapper/019:06:290
121526956,9sleep60-21swapper/619:06:206
325652680,0pltrace0-21swapper/300:01:463
156472680,1sleep40-21swapper/422:30:224
263412670,0sleep20-21swapper/221:30:192
177672660,0sleep40-21swapper/421:55:204
204162640,0sleep40-21swapper/422:35:184
2647152630,0pltrace0-21swapper/123:51:471
127072630,0sleep20-21swapper/219:25:212
216102620,1sleep00-21swapper/022:00:210
69952610,0sleep00-21swapper/022:55:330
128232610,1sleep30-21swapper/300:12:283
32942600,0sleep30-21swapper/322:52:003
144402600,0sleep00-21swapper/021:51:480
317582590,0sleep00-21swapper/023:24:580
103572590,0sleep40-21swapper/421:14:424
2897052580,0pltrace0-21swapper/020:51:450
1770352580,1pltrace0-21swapper/220:31:452
769752570,0pltrace0-21swapper/223:31:462
2177352560,1pltrace0-21swapper/100:21:461
215922550,0sleep40-21swapper/421:25:164
10752550,0sleep10-21swapper/122:50:221
52652540,0sleep40-21swapper/421:42:064
2327952540,1pltrace0-21swapper/522:01:465
73552530,1pltrace740-21pltrace-run20:01:454
286212510,1sleep444-21ksoftirqd/420:50:314
14692500,0sleep10-21swapper/100:00:161
93032490,0sleep5501rcuc/521:12:515
166312490,0sleep20-21swapper/200:15:392
417252480,0pltrace0-21swapper/619:11:456
805952430,0pltrace65-21ksoftirqd/722:59:107
279862400,1sleep40-21swapper/422:45:124
805952350,0pltrace0-21swapper/723:01:127
36552270,1pltrace368-21grep21:36:465
1669992624,1cyclictest0-21swapper/520:39:415
3232250,0sleep60-21swapper/620:00:346
283882240,0sleep00-21swapper/000:30:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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