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 Mon Jan 12, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1137637	2	74	63,8	sleep4	0	-21	swapper/4	19:03:39	4
1136523	2	56	2,48	sleep7	0	-21	swapper/7	19:03:26	7
1138244	99	45	40,4	cyclictest	1863162	-21	latency_hist	00:27:59	7
1137898	2	42	32,7	sleep6	0	-21	swapper/6	19:07:18	6
1842964	2	41	0,1	sleep6	0	-21	swapper/6	00:18:18	6
1138244	99	40	34,5	cyclictest	1789910	-21	latency_hist	23:57:58	7
1138240	99	39	36,2	cyclictest	1545894	-21	kworker/u16:2+flush-8:0	23:48:23	6
1138244	99	35	29,5	cyclictest	650	-21	systemd-journal	23:52:58	7
1138235	99	35	33,2	cyclictest	1545894	-21	kworker/u16:2+events_unbound	00:13:27	5
1138235	99	35	33,2	cyclictest	1545894	-21	kworker/u16:2+events_unbound	00:13:27	5
1137821	2	35	25,7	sleep5	0	-21	swapper/5	19:06:13	5
1138235	99	34	32,2	cyclictest	1589900	-21	kworker/u16:3+flush-8:0	00:33:24	5
1138235	99	34	32,2	cyclictest	1319773	-21	kworker/u16:2+events_unbound	21:12:35	5
1790368	2	33	0,1	chrt	1790370	-21	sh	23:58:07	7
1138244	99	33	28,4	cyclictest	1306790	-21	latency_hist	20:32:59	7
1138235	99	33	31,2	cyclictest	1589900	-21	kworker/u16:3+events_unbound	23:26:10	5
1138235	99	33	31,2	cyclictest	1544113	-21	kworker/u16:1+events_unbound	23:13:06	5
1138235	99	33	31,2	cyclictest	1411416	-21	kworker/u16:3+events_unbound	22:11:30	5
1138235	99	33	31,2	cyclictest	1119860	-21	kworker/u16:2+events_unbound	19:14:09	5
1138235	99	32	30,2	cyclictest	1544113	-21	kworker/u16:1+flush-8:0	23:30:19	5
1138235	99	32	30,2	cyclictest	1460629	-21	kworker/u16:0+events_unbound	22:23:26	5
1138235	99	31	30,1	cyclictest	1411416	-21	kworker/u16:3+events_unbound	21:56:02	5
1138235	99	31	29,2	cyclictest	1589900	-21	kworker/u16:3+flush-8:0	00:28:15	5
1138235	99	31	29,2	cyclictest	1589900	-21	kworker/u16:3+events_unbound	00:20:23	5
1138235	99	31	28,2	cyclictest	1161360	-21	kworker/u16:4+events_unbound	19:18:14	5
1138235	99	30	28,2	cyclictest	1589900	-21	kworker/u16:3+events_unbound	23:36:06	5
1138235	99	30	28,2	cyclictest	1589900	-21	kworker/u16:3+events_unbound	23:36:06	5
1138235	99	30	28,2	cyclictest	1589900	-21	kworker/u16:3+events_unbound	23:00:30	5
1138235	99	30	28,2	cyclictest	1545894	-21	kworker/u16:2+events_unbound	23:40:31	5
1138235	99	30	28,2	cyclictest	1545894	-21	kworker/u16:2+events_unbound	22:50:35	5
1138235	99	30	28,2	cyclictest	1545894	-21	kworker/u16:2+events_unbound	00:26:29	5
1138235	99	30	28,2	cyclictest	1319773	-21	kworker/u16:2+flush-8:0	21:43:42	5
1138235	99	30	28,2	cyclictest	1319773	-21	kworker/u16:2+events_unbound	20:46:20	5
1138235	99	30	28,2	cyclictest	1319773	-21	kworker/u16:2+events_unbound	20:40:28	5
1138235	99	30	28,2	cyclictest	1248896	-21	kworker/u16:1+events_unbound	20:16:32	5
1138235	99	30	28,2	cyclictest	1219593	-21	kworker/u16:4+events_unbound	20:03:20	5
1138235	99	30	28,2	cyclictest	1219593	-21	kworker/u16:4+events_unbound	19:55:53	5
1278173	2	29	0,1	chrt	1278175	-21	cpuspeed_turbos	20:18:09	7
1138235	99	29	27,2	cyclictest	3817920	-21	kworker/u16:1+events_unbound	19:40:48	5
1138235	99	29	27,2	cyclictest	3817920	-21	kworker/u16:1+events_unbound	19:24:21	5
1138235	99	29	27,2	cyclictest	1799158	-21	kworker/u16:4+events_unbound	00:01:55	5
1138235	99	29	27,2	cyclictest	1589900	-21	kworker/u16:3+flush-8:0	23:10:31	5
1138235	99	29	27,2	cyclictest	1589900	-21	kworker/u16:3+events_unbound	23:51:10	5
1138235	99	29	27,2	cyclictest	1589900	-21	kworker/u16:3+events_unbound	00:05:50	5
1138235	99	29	27,2	cyclictest	1545894	-21	kworker/u16:2+events_unbound	22:47:30	5
1138235	99	29	27,2	cyclictest	1545894	-21	kworker/u16:2+events_unbound	22:39:06	5
1138235	99	29	27,2	cyclictest	1411416	-21	kworker/u16:3+flush-8:0	22:16:15	5
1138235	99	29	27,2	cyclictest	1355329	-21	kworker/u16:1+flush-8:0	21:13:27	5
1138235	99	29	27,2	cyclictest	1277788	-21	kworker/u16:3+events_unbound	20:26:53	5
1138235	99	29	27,2	cyclictest	1258602	-21	kworker/u16:2+events_unbound	20:12:33	5
1138235	99	29	27,2	cyclictest	1248896	-21	kworker/u16:1+events_unbound	20:21:17	5
1138235	99	29	27,2	cyclictest	1199086	-21	kworker/u16:0+flush-8:0	19:48:32	5
1138235	99	28	26,2	cyclictest	1544113	-21	kworker/u16:1+events_unbound	23:20:18	5
1138235	99	28	26,2	cyclictest	1544113	-21	kworker/u16:1+events_unbound	22:36:14	5
1138235	99	28	26,2	cyclictest	1460629	-21	kworker/u16:0+events_unbound	22:31:17	5
1138235	99	28	26,2	cyclictest	1355329	-21	kworker/u16:1+events_unbound	21:35:11	5
1138235	99	28	26,2	cyclictest	1355329	-21	kworker/u16:1+events_unbound	21:35:11	5
1138235	99	28	26,2	cyclictest	1291812	-21	kworker/u16:4+events_unbound	20:34:27	5
1138235	99	28	26,2	cyclictest	1199086	-21	kworker/u16:0+events_unbound	21:04:48	5
1138235	99	27	25,2	cyclictest	1545894	-21	kworker/u16:2+events_unbound	22:22:23	5
1138235	99	27	25,2	cyclictest	1544113	-21	kworker/u16:1+events_unbound	22:55:21	5
1138235	99	27	25,2	cyclictest	1544113	-21	kworker/u16:1+events_unbound	22:55:21	5
1138235	99	27	25,2	cyclictest	1460629	-21	kworker/u16:0+events_unbound	22:03:39	5
1138235	99	27	25,2	cyclictest	1319773	-21	kworker/u16:2+events_unbound	21:30:38	5
1138235	99	27	25,2	cyclictest	1319773	-21	kworker/u16:2+events_unbound	20:50:48	5
1138235	99	27	25,2	cyclictest	1219593	-21	kworker/u16:4+events_unbound	20:01:29	5
1138235	99	27	25,2	cyclictest	1199086	-21	kworker/u16:0+events_unbound	19:44:33	5
1138235	99	27	24,2	cyclictest	1460629	-21	kworker/u16:0+events_unbound	21:58:11	5
1138244	99	26	20,5	cyclictest	1435741	-21	latency_hist	21:32:58	7
1138235	99	26	24,2	cyclictest	1813489	-21	kworker/u16:0+flush-8:0	00:08:50	5
1138235	99	26	24,2	cyclictest	1411416	-21	kworker/u16:3+events_unbound	21:49:19	5
1138235	99	26	24,2	cyclictest	1291812	-21	kworker/u16:4+events_unbound	20:54:23	5
1138235	99	26	24,2	cyclictest	1291812	-21	kworker/u16:4+events_unbound	20:54:23	5
1138235	99	26	24,2	cyclictest	1277788	-21	kworker/u16:3+events_unbound	20:31:21	5
1138230	99	26	23,2	cyclictest	1291812	-21	kworker/u16:4+flush-8:0	21:13:52	4
1743964	2	25	0,1	sleep4	0	-21	swapper/4	23:38:17	4
1138235	99	25	23,2	cyclictest	1319773	-21	kworker/u16:2+events_unbound	21:01:05	5
1138235	99	25	23,2	cyclictest	1199086	-21	kworker/u16:0+events_unbound	19:34:29	5
1138235	99	25	22,2	cyclictest	3817920	-21	kworker/u16:1+flush-8:0	19:28:24	5
1138235	99	24	22,2	cyclictest	1544113	-21	kworker/u16:1+flush-8:0	23:46:01	5
1138235	99	24	22,2	cyclictest	1109076	-21	kworker/u16:3+events_unbound	19:09:28	5
1138244	99	23	18,4	cyclictest	1716724	-21	latency_hist	23:27:58	7
1138235	99	21	19,2	cyclictest	1355329	-21	kworker/u16:1+events_unbound	21:38:17	5
1138244	99	19	19,0	cyclictest	0	-21	swapper/7	00:13:28	7
1138244	99	19	19,0	cyclictest	0	-21	swapper/7	00:13:28	7
1138244	99	19	14,4	cyclictest	1267	-21	snmpd	19:54:03	7
1138244	99	19	13,5	cyclictest	1258219	-21	latency_hist	20:07:58	7
1138244	99	18	0,10	cyclictest	1447975	-21	ssh	21:37:58	7
1138244	99	18	0,10	cyclictest	1447975	-21	ssh	21:37:58	7
1138244	99	17	2,14	cyclictest	0	-21	swapper/7	00:09:15	7
1138244	99	17	13,3	cyclictest	1374708	-21	diskmemload	22:36:51	7
1138244	99	17	12,4	cyclictest	1753317	-21	latency_hist	23:42:58	7
1138230	99	17	14,3	cyclictest	0	-21	swapper/4	00:14:12	4
1138230	99	17	14,3	cyclictest	0	-21	swapper/4	00:14:12	4
1138230	99	17	0,15	cyclictest	0	-21	swapper/4	20:38:22	4
1138244	99	16	4,11	cyclictest	0	-21	swapper/7	21:18:48	7
1138244	99	16	13,2	cyclictest	1267	-21	snmpd	21:44:26	7
1138244	99	16	12,3	cyclictest	1267	-21	snmpd	20:26:51	7
1138244	99	16	11,4	cyclictest	1522643	-21	cat	22:08:14	7
1138244	99	16	0,15	cyclictest	1521340	-21	latency_hist	22:07:58	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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