OSADL QA Farm on Real-time of Mainline Linux

About - Hardware - CPUs - Benchmarks - Graphics - Benchmarks - Kernels - Boards/Distros - Latency monitoring - Latency plots - System data - Profiles - Compare - Awards

Default latency plot of system in rack #0, slot #2

Click here to display the system's profile data or here to proceed to next system.

Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 rack0slot2.osadl.org (updated Sun Aug 16, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1254304	2	95	0,1	sleep7	1254305	-21	ssh	11:32:16	7
662512	2	55	20,30	sleep7	0	-21	swapper/7	07:05:48	7
662643	2	51	41,7	sleep4	0	-21	swapper/4	07:07:38	4
662955	99	47	0,45	cyclictest	1340190	-21	latency_hist	12:07:50	7
662615	2	47	36,7	sleep5	0	-21	swapper/5	07:07:15	5
662955	99	46	40,5	cyclictest	1168943	-21	latency_hist	10:57:49	7
662946	99	45	42,2	cyclictest	1288892	-21	kworker/u16:4+events_unbound	11:48:22	5
662942	99	40	37,2	cyclictest	773799	-21	kworker/u16:3+flush-8:0	09:07:50	4
662942	99	40	37,2	cyclictest	773799	-21	kworker/u16:3+flush-8:0	09:07:50	4
662955	99	38	33,4	cyclictest	973318	-21	latency_hist	09:37:49	7
662951	99	37	34,2	cyclictest	1120453	-21	kworker/u16:2+flush-8:0	10:42:52	6
662946	99	37	35,2	cyclictest	1303535	-21	kworker/u16:0+events_unbound	12:19:21	5
662946	99	37	35,2	cyclictest	1303535	-21	kworker/u16:0+events_unbound	12:19:21	5
662946	99	37	34,2	cyclictest	830896	-21	kworker/u16:2+flush-8:0	09:17:52	5
662951	99	36	33,2	cyclictest	598673	-21	kworker/u16:3+flush-8:0	07:17:50	6
662946	99	36	34,2	cyclictest	1057149	-21	kworker/u16:1+events_unbound	10:21:26	5
662946	99	36	34,2	cyclictest	1023586	-21	kworker/u16:3+events_unbound	10:36:37	5
662951	99	35	33,2	cyclictest	1023586	-21	kworker/u16:3+flush-8:0	10:34:52	6
662946	99	35	33,2	cyclictest	1303535	-21	kworker/u16:0+flush-8:0	12:26:29	5
662946	99	35	33,2	cyclictest	1229246	-21	kworker/u16:1+events_unbound	11:26:17	5
662946	99	35	33,2	cyclictest	1057149	-21	kworker/u16:1+flush-8:0	10:09:36	5
662946	99	35	33,2	cyclictest	1023586	-21	kworker/u16:3+flush-8:0	10:32:17	5
662946	99	35	33,2	cyclictest	1023586	-21	kworker/u16:3+flush-8:0	10:16:27	5
662951	99	34	32,2	cyclictest	900250	-21	kworker/u16:0+flush-8:0	09:41:17	6
662951	99	34	32,2	cyclictest	764312	-21	kworker/u16:1+events_unbound	09:45:46	6
662951	99	34	32,2	cyclictest	764312	-21	kworker/u16:1+events_unbound	09:45:46	6
662951	99	34	32,2	cyclictest	1303535	-21	kworker/u16:0+events_unbound	12:36:48	6
662951	99	34	32,2	cyclictest	1288892	-21	kworker/u16:4+events_unbound	12:00:04	6
662951	99	34	32,2	cyclictest	1057149	-21	kworker/u16:1+flush-8:0	10:23:57	6
662951	99	34	32,2	cyclictest	1057149	-21	kworker/u16:1+events_unbound	10:29:17	6
662946	99	34	32,2	cyclictest	764312	-21	kworker/u16:1+flush-8:0	09:52:13	5
662946	99	34	32,2	cyclictest	1303535	-21	kworker/u16:0+events_unbound	11:56:09	5
662946	99	34	32,2	cyclictest	1265039	-21	kworker/u16:2+flush-8:0	11:44:20	5
662946	99	34	32,2	cyclictest	1265039	-21	kworker/u16:2+flush-8:0	11:36:49	5
662946	99	34	32,2	cyclictest	1142850	-21	kworker/u16:3+events_unbound	10:59:29	5
662942	99	34	31,2	cyclictest	830896	-21	kworker/u16:2+flush-8:0	09:32:50	4
662951	99	33	31,2	cyclictest	900250	-21	kworker/u16:0+flush-8:0	09:58:33	6
662951	99	33	31,2	cyclictest	830896	-21	kworker/u16:2+flush-8:0	09:25:33	6
662951	99	33	31,2	cyclictest	1155350	-21	kworker/u16:2+flush-8:0	11:02:29	6
662951	99	33	31,2	cyclictest	1155350	-21	kworker/u16:2+flush-8:0	10:56:12	6
662951	99	33	31,2	cyclictest	1142850	-21	kworker/u16:3+events_unbound	11:25:56	6
662951	99	33	31,2	cyclictest	1023586	-21	kworker/u16:3+flush-8:0	10:21:13	6
662946	99	33	31,2	cyclictest	764312	-21	kworker/u16:1+flush-8:0	09:41:25	5
662946	99	33	31,2	cyclictest	598673	-21	kworker/u16:3+events_unbound	07:21:54	5
662946	99	33	31,2	cyclictest	1303535	-21	kworker/u16:0+flush-8:0	12:33:49	5
662946	99	33	31,2	cyclictest	1288892	-21	kworker/u16:4+events_unbound	12:31:32	5
662946	99	33	31,2	cyclictest	1180377	-21	kworker/u16:0+flush-8:0	11:04:32	5
662946	99	33	31,2	cyclictest	1155350	-21	kworker/u16:2+flush-8:0	11:11:01	5
662951	99	32	30,2	cyclictest	764312	-21	kworker/u16:1+events_unbound	09:09:25	6
662951	99	32	30,2	cyclictest	1376878	-21	kworker/u16:2+flush-8:0	12:27:20	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


Access: public		Short link to this page
This page was last modified on 2019-05-28 - 00:17