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2021-01-26 - 06:55

(undisclosed), Linux 4.9.20-rt16 (Profile)

Latency plot of system in rack #7, slot #1
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 -h400 -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 50 highest latencies:
System rack7slot1.osadl.org (updated Tue Jan 26, 2021 00:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18826212158,23sleep10-21swapper/119:06:581
18705211048,56sleep30-21swapper/319:05:283
71142930,1sleep23676-21stress22:38:482
71142930,1sleep23676-21stress22:38:472
1901928355,23sleep00-21swapper/019:09:290
1819727952,21sleep20-21swapper/219:05:142
1914799475,31cyclictest3674-21stress00:13:151
1914799475,31cyclictest3674-21stress00:13:141
1916199466,26cyclictest0-21swapper/321:17:133
1914799463,35cyclictest3674-21stress00:35:171
1914799463,32cyclictest0-21swapper/123:35:031
1914799463,32cyclictest0-21swapper/123:35:031
1914799463,29cyclictest31376-21sort19:35:131
1914799463,29cyclictest31376-21sort19:35:121
1914799463,29cyclictest30388-21date19:35:011
1914799463,28cyclictest21654-21apt-get20:35:041
1914799454,36cyclictest30011-21apt-get20:55:021
1914799453,27cyclictest3676-21stress22:50:271
1914799453,27cyclictest3676-21stress22:26:071
1914799453,27cyclictest3676-21stress00:06:521
1914799453,27cyclictest3674-21stress23:05:201
1914799453,27cyclictest3674-21stress21:23:471
1914799443,31cyclictest3676-21stress23:29:221
1914799443,28cyclictest1160-21proc_pri19:40:161
1914799443,27cyclictest7953-21find00:00:251
1914799443,27cyclictest6786-21memory21:15:241
1914799443,27cyclictest3674-21stress00:25:001
1914799443,26cyclictest3676-21stress22:44:231
1914799443,26cyclictest3674-21stress21:30:301
1914799442,27cyclictest3674-21stress23:39:131
1914799442,27cyclictest3674-21stress23:39:131
1914799433,36cyclictest4339-21apt-get19:50:031
1914799433,35cyclictest9137-21apt-get20:05:041
1914799433,32cyclictest2843-21cat19:45:101
1914799433,26cyclictest3676-21stress23:15:281
1914799433,26cyclictest13902-21if_err_eth120:15:131
1914799433,25cyclictest3676-21stress23:22:101
1914799433,25cyclictest3676-21stress21:41:231
1914799433,25cyclictest3676-21stress21:41:231
1914799433,25cyclictest3676-21stress00:31:431
1914799433,25cyclictest3676-21stress00:17:451
1914799433,25cyclictest3676-21stress00:17:441
1914799433,25cyclictest3674-21stress22:07:201
1914799432,26cyclictest3676-21stress22:55:201
1914799432,26cyclictest3674-21stress21:25:201
1914799432,26cyclictest3674-21stress21:25:191
19147994314,20cyclictest0-21swapper/123:10:021
1914799423,31cyclictest26427-21aten2_r7power_p19:25:041
1914799423,26cyclictest5355-21apt-get22:35:041
1914799423,26cyclictest5355-21apt-get22:35:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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