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 Aug 02, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1202729	2	57	46,8	sleep4	0	-21	swapper/4	19:08:14	4
1202648	2	57	22,30	sleep7	0	-21	swapper/7	19:07:04	7
1203065	99	43	41,2	cyclictest	1440051	-21	kworker/u16:1+flush-8:0	21:09:15	5
1202692	2	42	31,8	sleep5	0	-21	swapper/5	19:07:43	5
1203073	99	41	36,4	cyclictest	1488497	-21	latency_hist	21:28:46	7
1395989	2	39	0,0	sleep7	1395990	-21	grep	20:44:06	7
1203065	99	37	35,2	cyclictest	1485649	-21	kworker/u16:3+flush-8:0	21:28:58	5
1203065	99	36	34,2	cyclictest	1884244	-21	kworker/u16:4+flush-8:0	00:09:11	5
1203073	99	34	31,2	cyclictest	125	-21	kswapd0	00:07:27	7
1203065	99	34	32,2	cyclictest	1618382	-21	kworker/u16:1+events_unbound	23:08:59	5
1203065	99	33	31,2	cyclictest	1618382	-21	kworker/u16:1+flush-8:0	22:34:02	5
1202600	2	33	23,7	sleep6	0	-21	swapper/6	19:06:23	6
1203065	99	32	30,2	cyclictest	1511728	-21	kworker/u16:1+flush-8:0	21:44:02	5
1203065	99	31	29,2	cyclictest	1884244	-21	kworker/u16:4+flush-8:0	00:34:03	5
1203073	99	30	24,5	cyclictest	1362512	-21	latency_hist	20:28:46	7
1203065	99	30	28,2	cyclictest	1755545	-21	kworker/u16:0+flush-8:0	23:23:59	5
1203073	99	29	22,6	cyclictest	1633529	-21	latency_hist	22:28:45	7
1203065	99	29	27,2	cyclictest	1183337	-21	kworker/u16:0+flush-8:0	19:54:00	5
1203065	99	28	26,2	cyclictest	1557920	-21	kworker/u16:4+flush-8:0	22:09:01	5
1203065	99	26	24,2	cyclictest	1304074	-21	kworker/u16:2+flush-8:0	20:04:01	5
1203065	99	26	24,2	cyclictest	1129118	-21	kworker/u16:2+events_unbound	19:24:00	5
1203065	99	26	23,2	cyclictest	1618382	-21	kworker/u16:1+flush-8:0	22:53:52	5
1203073	99	25	20,4	cyclictest	1536801	-21	latency_hist	21:48:45	7
1203073	99	25	18,6	cyclictest	1294471	-21	latency_hist	19:53:46	7
1203069	99	24	22,2	cyclictest	1352672	-21	kworker/u16:3+flush-8:0	20:29:11	6
1203065	99	24	22,2	cyclictest	1742643	-21	kworker/u16:2+events_unbound	23:14:09	5
1203065	99	24	22,2	cyclictest	1618382	-21	kworker/u16:1+flush-8:0	22:24:10	5
1203065	99	24	22,2	cyclictest	1618382	-21	kworker/u16:1+flush-8:0	22:19:13	5
1203065	99	24	22,2	cyclictest	1284659	-21	kworker/u16:1+flush-8:0	20:29:01	5
1203065	99	24	22,2	cyclictest	1202767	-21	kworker/u16:3+flush-8:0	19:13:51	5
1203065	99	23	21,2	cyclictest	1823966	-21	kworker/u16:0+events_unbound	00:04:05	5
1203073	99	22	17,4	cyclictest	1323639	-21	latency_hist	20:08:46	7
1203065	99	22	20,2	cyclictest	1884244	-21	kworker/u16:4+flush-8:0	00:22:47	5
1203065	99	22	20,2	cyclictest	1823966	-21	kworker/u16:0+flush-8:0	23:59:11	5
1203065	99	22	20,2	cyclictest	1618382	-21	kworker/u16:1+events_unbound	23:04:15	5
1203065	99	22	20,2	cyclictest	1304074	-21	kworker/u16:2+flush-8:0	21:22:03	5
1203065	99	21	19,2	cyclictest	1823966	-21	kworker/u16:0+events_unbound	23:44:15	5
1203065	99	21	19,2	cyclictest	1618382	-21	kworker/u16:1+flush-8:0	23:03:41	5
1203065	99	21	19,2	cyclictest	1557920	-21	kworker/u16:4+flush-8:0	21:58:41	5
1203065	99	21	19,2	cyclictest	1372190	-21	kworker/u16:0+events_unbound	21:14:00	5
1203065	99	21	19,2	cyclictest	1183337	-21	kworker/u16:0+events_unbound	19:34:04	5
1203065	99	21	18,2	cyclictest	1557920	-21	kworker/u16:4+flush-8:0	21:58:51	5
1203060	99	21	17,1	cyclictest	0	-21	swapper/4	00:34:14	4
1203065	99	20	18,2	cyclictest	1884244	-21	kworker/u16:4+flush-8:0	00:29:11	5
1203065	99	20	18,2	cyclictest	1884244	-21	kworker/u16:4+flush-8:0	00:29:11	5
1203065	99	20	18,2	cyclictest	1836917	-21	kworker/u16:1+flush-8:0	23:58:40	5
1203065	99	20	18,2	cyclictest	1631241	-21	kworker/u16:0+flush-8:0	22:29:01	5
1203065	99	20	18,2	cyclictest	1631241	-21	kworker/u16:0+flush-8:0	22:29:01	5
1203065	99	20	18,2	cyclictest	1557920	-21	kworker/u16:4+flush-8:0	22:04:16	5
1203065	99	20	18,2	cyclictest	1525117	-21	kworker/u16:2+events_unbound	22:14:19	5
1203065	99	20	18,2	cyclictest	1372190	-21	kworker/u16:0+events_unbound	20:44:16	5
1203073	99	19	14,4	cyclictest	0	-21	swapper/7	22:58:46	7
1203065	99	19	17,2	cyclictest	1836917	-21	kworker/u16:1+flush-8:0	00:16:18	5
1203065	99	19	17,2	cyclictest	1655845	-21	kworker/u16:2+events_unbound	22:44:02	5
1203065	99	19	16,2	cyclictest	1742643	-21	kworker/u16:2+events_unbound	23:28:55	5
1203073	99	18	0,16	cyclictest	0	-21	swapper/7	22:04:11	7
1203065	99	18	16,2	cyclictest	1823966	-21	kworker/u16:0+flush-8:0	23:50:11	5
1203065	99	18	16,2	cyclictest	1823966	-21	kworker/u16:0+flush-8:0	23:50:11	5
1203065	99	18	16,2	cyclictest	1742643	-21	kworker/u16:2+flush-8:0	23:34:09	5
1203065	99	18	16,2	cyclictest	1304074	-21	kworker/u16:2+events_unbound	20:51:06	5
1203065	99	18	16,2	cyclictest	1284659	-21	kworker/u16:1+events_unbound	20:59:13	5
1203065	99	18	16,2	cyclictest	1284659	-21	kworker/u16:1+events_unbound	20:23:27	5
1203065	99	18	15,2	cyclictest	1681848	-21	kworker/u16:3+flush-8:0	22:48:55	5
1203073	99	17	13,3	cyclictest	1302	-21	snmpd	19:54:18	7
1203065	99	17	15,2	cyclictest	1742643	-21	kworker/u16:2+flush-8:0	23:19:36	5
1203065	99	17	15,2	cyclictest	1657741	-21	kworker/u16:4+events_unbound	23:39:04	5
1203065	99	17	15,2	cyclictest	1618382	-21	kworker/u16:1+flush-8:0	22:39:01	5
1203065	99	17	15,2	cyclictest	1304074	-21	kworker/u16:2+flush-8:0	21:24:14	5
1203065	99	17	15,2	cyclictest	1304074	-21	kworker/u16:2+flush-8:0	21:04:08	5
1203065	99	17	15,2	cyclictest	1284659	-21	kworker/u16:1+events_unbound	20:39:11	5
1203065	99	17	15,2	cyclictest	1183337	-21	kworker/u16:0+flush-8:0	19:09:16	5
1203065	99	17	15,2	cyclictest	1183337	-21	kworker/u16:0+events_unbound	19:19:15	5
1203073	99	16	9,6	cyclictest	1609361	-21	latency_hist	22:18:46	7
1203073	99	16	6,8	cyclictest	6530	-21	gmain	23:53:43	7
1203073	99	16	6,8	cyclictest	6530	-21	gmain	23:53:43	7
1203073	99	16	11,4	cyclictest	1850901	-21	latency_hist	23:58:45	7
1203073	99	16	0,14	cyclictest	1776215	-21	ssh	23:24:28	7
1203073	99	16	0,14	cyclictest	1740059	-21	ssh	23:09:35	7
1203073	99	16	0,14	cyclictest	1558000	-21	ssh	21:54:13	7
1203073	99	16	0,14	cyclictest	0	-21	swapper/7	20:09:02	7
1203065	99	16	14,2	cyclictest	1485649	-21	kworker/u16:3+events_unbound	21:49:26	5
1203065	99	16	14,2	cyclictest	1324024	-21	kworker/u16:3+events_unbound	20:13:02	5
1203065	99	16	14,2	cyclictest	1265093	-21	kworker/u16:3+events_unbound	19:46:15	5
1203065	99	16	13,2	cyclictest	1485649	-21	kworker/u16:3+flush-8:0	21:39:01	5
1203060	99	16	14,2	cyclictest	1557920	-21	kworker/u16:4+flush-8:0	21:54:45	4
1203073	99	15	7,7	cyclictest	6050	-21	gmain	23:08:23	7
1203073	99	15	12,2	cyclictest	0	-21	swapper/7	21:58:46	7
1203073	99	15	0,7	cyclictest	1642388	-21	ssh	22:29:09	7
1203073	99	15	0,7	cyclictest	1642388	-21	ssh	22:29:09	7
1203073	99	15	0,3	cyclictest	1885453	-21	sh	00:10:18	7
1203073	99	15	0,14	cyclictest	0	-21	swapper/7	19:39:12	7
1203073	99	15	0,13	cyclictest	0	-21	swapper/7	21:19:10	7
1203073	99	15	0,13	cyclictest	0	-21	swapper/7	19:29:07	7
1203069	99	15	14,1	cyclictest	1421205	-21	cpuspeed	20:58:56	6
1203069	99	15	0,14	cyclictest	0	-21	swapper/6	23:59:12	6
1203065	99	15	13,2	cyclictest	1265093	-21	kworker/u16:3+events_unbound	20:00:02	5
1203065	99	15	13,2	cyclictest	1183337	-21	kworker/u16:0+flush-8:0	19:48:57	5
1203060	99	15	0,1	cyclictest	0	-21	swapper/4	20:44:12	4
1203073	99	14	8,5	cyclictest	1381893	-21	latency_hist	20:38:46	7
1203073	99	14	8,5	cyclictest	1302	-21	snmpd	23:48:09	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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