OSADL QA Farm on Real-time of Mainline Linux

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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 100 highest latencies:

System rack0slot2.osadl.org (updated Sun May 24, 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
1216945	2	59	48,7	sleep4	0	-21	swapper/4	07:02:25	4
1226437	99	46	44,2	cyclictest	1785101	-21	kworker/u16:0+events_unbound	11:37:52	4
1226437	99	42	39,2	cyclictest	1873036	-21	kworker/u16:4+events_unbound	12:17:24	4
1226437	99	41	39,2	cyclictest	1277164	-21	kworker/u16:0+flush-8:0	08:17:22	4
1225975	2	41	1,35	sleep7	0	-21	swapper/7	07:05:01	7
1225852	2	41	30,8	sleep5	0	-21	swapper/5	07:03:15	5
1226437	99	40	37,3	cyclictest	1931920	-21	kworker/u16:0+flush-8:0	12:32:22	4
1226437	99	39	37,2	cyclictest	1506264	-21	kworker/u16:3+events_unbound	10:17:05	4
1226437	99	38	35,2	cyclictest	1785101	-21	kworker/u16:0+events_unbound	11:49:04	4
1226449	99	37	35,2	cyclictest	1664145	-21	kworker/u16:0+events_unbound	10:30:56	6
1226449	99	37	35,2	cyclictest	1422656	-21	kworker/u16:3+events_unbound	09:10:44	6
1226437	99	37	35,2	cyclictest	1664145	-21	kworker/u16:0+events_unbound	10:46:28	4
1226449	99	36	34,2	cyclictest	1848044	-21	kworker/u16:1+events_unbound	11:58:44	6
1226449	99	36	34,2	cyclictest	1519087	-21	kworker/u16:0+events_unbound	09:43:56	6
1226449	99	36	34,2	cyclictest	1506264	-21	kworker/u16:3+events_unbound	10:36:40	6
1226449	99	36	34,2	cyclictest	1451073	-21	kworker/u16:1+flush-8:0	09:24:03	6
1226449	99	36	34,2	cyclictest	1354771	-21	kworker/u16:2+flush-8:0	09:18:15	6
1226449	99	35	33,2	cyclictest	1931920	-21	kworker/u16:0+events_unbound	12:32:23	6
1226449	99	35	33,2	cyclictest	1737918	-21	kworker/u16:5+events_unbound	11:37:46	6
1226449	99	35	33,2	cyclictest	1737918	-21	kworker/u16:5+events_unbound	11:22:00	6
1226449	99	35	33,2	cyclictest	1715920	-21	kworker/u16:2+events_unbound	10:53:36	6
1226449	99	35	33,2	cyclictest	1664145	-21	kworker/u16:0+events_unbound	11:10:07	6
1226449	99	35	33,2	cyclictest	1506264	-21	kworker/u16:3+events_unbound	09:55:45	6
1226449	99	35	33,2	cyclictest	1473030	-21	kworker/u16:4+events_unbound	09:33:40	6
1226437	99	35	33,2	cyclictest	1848628	-21	kworker/u16:2+flush-8:0	12:02:43	4
1226449	99	34	32,2	cyclictest	1931920	-21	kworker/u16:0+events_unbound	12:20:59	6
1226449	99	34	32,2	cyclictest	1567625	-21	kworker/u16:1+flush-8:0	09:48:07	6
1226437	99	34	32,2	cyclictest	1664145	-21	kworker/u16:0+events_unbound	10:58:56	4
1226450	99	33	31,1	cyclictest	1461015	-21	diskmemload	10:08:27	7
1226450	99	33	31,1	cyclictest	1461015	-21	diskmemload	10:08:27	7
1226449	99	33	31,2	cyclictest	1931920	-21	kworker/u16:0+flush-8:0	12:29:43	6
1226449	99	33	31,2	cyclictest	1690450	-21	kworker/u16:1+flush-8:0	10:45:28	6
1226449	99	33	31,2	cyclictest	1306782	-21	kworker/u16:1+flush-8:0	08:07:00	6
1226450	99	32	0,30	cyclictest	1727568	-21	latency_hist	10:57:22	7
1226449	99	32	30,2	cyclictest	1751986	-21	kworker/u16:2+events_unbound	11:34:11	6
1226449	99	32	30,2	cyclictest	1642188	-21	kworker/u16:4+events_unbound	11:03:42	6
1226445	99	32	29,3	cyclictest	1259332	-21	kworker/u16:3+events_unbound	07:27:45	5
1226437	99	32	30,2	cyclictest	1785101	-21	kworker/u16:0+events_unbound	11:27:50	4
1226437	99	32	30,2	cyclictest	1785101	-21	kworker/u16:0+events_unbound	11:27:50	4
1226450	99	31	29,1	cyclictest	0	-21	swapper/7	12:12:58	7
1226449	99	31	29,2	cyclictest	1873036	-21	kworker/u16:4+events_unbound	12:26:55	6
1226449	99	31	29,2	cyclictest	1737918	-21	kworker/u16:5+events_unbound	11:12:59	6
1226449	99	31	29,2	cyclictest	1519087	-21	kworker/u16:0+events_unbound	09:38:43	6
1226449	99	31	29,2	cyclictest	1307392	-21	kworker/u16:5+flush-8:0	07:48:40	6
1226437	99	31	29,2	cyclictest	1751986	-21	kworker/u16:2+events_unbound	11:17:03	4
1226437	99	31	29,2	cyclictest	1737918	-21	kworker/u16:5+events_unbound	11:35:08	4
1226050	2	31	8,7	sleep6	0	-21	swapper/6	07:06:04	6
1226449	99	30	28,2	cyclictest	1848044	-21	kworker/u16:1+events_unbound	12:14:50	6
1226449	99	30	28,2	cyclictest	1737918	-21	kworker/u16:5+events_unbound	11:24:48	6
1226449	99	30	28,2	cyclictest	1594732	-21	kworker/u16:2+flush-8:0	10:09:48	6
1226449	99	30	28,2	cyclictest	1594732	-21	kworker/u16:2+flush-8:0	10:09:48	6
1226449	99	30	28,2	cyclictest	1592121	-21	kworker/u16:1+events_unbound	09:58:35	6
1226449	99	30	28,2	cyclictest	1402913	-21	kworker/u16:4+events_unbound	08:49:40	6
1226449	99	30	28,2	cyclictest	1259332	-21	kworker/u16:3+events_unbound	07:25:53	6
1226450	99	29	28,0	cyclictest	0	-21	swapper/7	12:23:30	7
1226450	99	29	26,2	cyclictest	1581614	-21	ssh	09:56:19	7
1226449	99	29	27,2	cyclictest	1848044	-21	kworker/u16:1+events_unbound	12:03:12	6
1226449	99	29	27,2	cyclictest	1592121	-21	kworker/u16:1+events_unbound	10:15:47	6
1226449	99	29	27,2	cyclictest	1506264	-21	kworker/u16:3+flush-8:0	10:50:59	6
1226449	99	29	27,2	cyclictest	1506264	-21	kworker/u16:3+flush-8:0	10:50:59	6
1226449	99	29	27,2	cyclictest	1277164	-21	kworker/u16:0+events_unbound	08:09:52	6
1226449	99	29	27,2	cyclictest	1259332	-21	kworker/u16:3+flush-8:0	08:13:40	6
1226449	99	29	27,2	cyclictest	1187542	-21	kworker/u16:0+events_unbound	07:09:40	6
1226445	99	29	27,2	cyclictest	1751986	-21	kworker/u16:2+events_unbound	11:32:37	5
1226445	99	29	26,2	cyclictest	1751986	-21	kworker/u16:2+flush-8:0	11:17:39	5
1226450	99	28	27,0	cyclictest	0	-21	swapper/7	12:28:15	7
1226450	99	28	27,0	cyclictest	0	-21	swapper/7	11:03:01	7
1226450	99	28	27,0	cyclictest	0	-21	swapper/7	11:00:38	7
1226450	99	28	27,0	cyclictest	0	-21	swapper/7	09:03:52	7
1226449	99	28	26,2	cyclictest	1785101	-21	kworker/u16:0+events_unbound	11:50:24	6
1226449	99	28	26,2	cyclictest	1594732	-21	kworker/u16:2+flush-8:0	10:22:27	6
1226449	99	28	26,2	cyclictest	1393340	-21	kworker/u16:1+events_unbound	08:45:32	6
1226449	99	28	26,2	cyclictest	1277164	-21	kworker/u16:0+events_unbound	09:15:35	6
1226449	99	28	26,2	cyclictest	1259332	-21	kworker/u16:3+flush-8:0	07:53:52	6
1226445	99	28	26,2	cyclictest	1826736	-21	kworker/u16:3+flush-8:0	11:47:47	5
1226445	99	28	26,2	cyclictest	1826736	-21	kworker/u16:3+events_unbound	11:42:51	5
1226437	99	28	26,2	cyclictest	1354771	-21	kworker/u16:2+events_unbound	09:08:55	4
1226437	99	28	25,2	cyclictest	1519087	-21	kworker/u16:0+flush-8:0	09:32:32	4
1226450	99	27	25,1	cyclictest	1629310	-21	ssh	10:14:45	7
1226450	99	27	25,1	cyclictest	0	-21	swapper/7	09:36:38	7
1226449	99	27	25,2	cyclictest	1848628	-21	kworker/u16:2+events_unbound	11:56:41	6
1226449	99	27	25,2	cyclictest	1751986	-21	kworker/u16:2+events_unbound	11:27:52	6
1226449	99	27	25,2	cyclictest	1751986	-21	kworker/u16:2+events_unbound	11:27:52	6
1226449	99	27	25,2	cyclictest	1506264	-21	kworker/u16:3+events_unbound	10:19:49	6
1226449	99	27	25,2	cyclictest	1451073	-21	kworker/u16:1+events_unbound	09:29:59	6
1226445	99	27	26,1	cyclictest	1402913	-21	kworker/u16:4+flush-8:0	08:47:22	5
1226445	99	27	21,5	cyclictest	1751986	-21	kworker/u16:2+events_unbound	11:12:39	5
1226437	99	27	25,2	cyclictest	1945524	-21	kworker/u16:3+events_unbound	12:37:22	4
1226450	99	26	25,0	cyclictest	0	-21	swapper/7	12:04:50	7
1226450	99	26	25,0	cyclictest	0	-21	swapper/7	10:38:21	7
1226450	99	26	25,0	cyclictest	0	-21	swapper/7	09:22:01	7
1226450	99	26	25,0	cyclictest	0	-21	swapper/7	08:59:39	7
1226450	99	26	25,0	cyclictest	0	-21	swapper/7	08:18:49	7
1226450	99	26	25,0	cyclictest	0	-21	swapper/7	08:16:52	7
1226450	99	26	25,0	cyclictest	0	-21	swapper/7	08:09:44	7
1226449	99	26	24,2	cyclictest	1848628	-21	kworker/u16:2+events_unbound	12:09:29	6
1226449	99	26	24,2	cyclictest	1848628	-21	kworker/u16:2+events_unbound	12:09:29	6
1226449	99	26	24,2	cyclictest	1432248	-21	kworker/u16:5+events_unbound	08:52:55	6
1226449	99	26	24,2	cyclictest	1432248	-21	kworker/u16:5+events_unbound	08:52:55	6
1226449	99	26	24,2	cyclictest	1354771	-21	kworker/u16:2+events_unbound	08:28:12	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17