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 Thu May 14, 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
2356820	2	93	0,0	sleep4	0	-21	swapper/4	21:25:20	4
2075276	2	57	47,7	sleep4	0	-21	swapper/4	19:06:59	4
2075664	99	56	54,2	cyclictest	2515600	-21	kworker/u16:3+events_unbound	00:18:26	5
2075115	2	52	42,7	sleep5	0	-21	swapper/5	19:04:44	5
2075664	99	49	47,2	cyclictest	2515600	-21	kworker/u16:3+flush-8:0	23:28:34	5
2075325	2	44	2,36	sleep7	0	-21	swapper/7	19:07:42	7
2075669	99	40	35,3	cyclictest	2455312	-21	cat	22:08:04	7
2075669	99	37	31,5	cyclictest	2564155	-21	latency_hist	22:53:04	7
2075664	99	37	35,2	cyclictest	2263052	-21	kworker/u16:2+events_unbound	22:14:14	5
2075664	99	36	34,2	cyclictest	2515600	-21	kworker/u16:3+events_unbound	00:08:28	5
2075664	99	35	33,2	cyclictest	2635246	-21	kworker/u16:2+events_unbound	23:42:26	5
2075664	99	35	33,2	cyclictest	2243078	-21	kworker/u16:3+events_unbound	22:07:14	5
2075138	2	35	25,7	sleep6	0	-21	swapper/6	19:05:01	6
2075664	99	34	32,2	cyclictest	2252697	-21	kworker/u16:0+events_unbound	22:46:17	5
2075664	99	34	31,2	cyclictest	2263052	-21	kworker/u16:2+flush-8:0	22:22:41	5
2075664	99	34	30,3	cyclictest	2252697	-21	kworker/u16:0+events_unbound	23:20:25	5
2075664	99	33	31,2	cyclictest	2721968	-21	kworker/u16:4+events_unbound	00:05:14	5
2075664	99	33	31,2	cyclictest	2515600	-21	kworker/u16:3+events_unbound	23:56:25	5
2075664	99	33	31,2	cyclictest	2263052	-21	kworker/u16:2+flush-8:0	21:28:27	5
2075664	99	33	31,2	cyclictest	2252697	-21	kworker/u16:0+events_unbound	21:54:47	5
2075664	99	32	30,2	cyclictest	2767567	-21	kworker/u16:0+events_unbound	00:32:01	5
2075664	99	32	30,2	cyclictest	2721968	-21	kworker/u16:4+events_unbound	00:01:02	5
2075664	99	32	30,2	cyclictest	2695355	-21	kworker/u16:1+events_unbound	00:36:13	5
2075664	99	32	30,2	cyclictest	2552447	-21	kworker/u16:1+flush-8:0	22:54:26	5
2075664	99	32	30,2	cyclictest	2515600	-21	kworker/u16:3+events_unbound	23:16:13	5
2075664	99	32	30,2	cyclictest	2465400	-21	kworker/u16:1+events_unbound	22:12:13	5
2075664	99	32	30,2	cyclictest	2263052	-21	kworker/u16:2+events_unbound	22:41:14	5
2075664	99	31	29,2	cyclictest	2263052	-21	kworker/u16:2+events_unbound	21:38:01	5
2075664	99	30	28,2	cyclictest	2695355	-21	kworker/u16:1+flush-8:0	00:25:13	5
2075664	99	30	28,2	cyclictest	2552447	-21	kworker/u16:1+events_unbound	22:52:46	5
2075657	99	30	28,2	cyclictest	2089300	-21	kworker/u16:0+events_unbound	19:38:29	4
2075666	99	29	26,2	cyclictest	2089300	-21	kworker/u16:0+flush-8:0	20:03:30	6
2075664	99	29	27,2	cyclictest	2515600	-21	kworker/u16:3+events_unbound	23:00:49	5
2075664	99	29	27,2	cyclictest	2465400	-21	kworker/u16:1+events_unbound	22:25:13	5
2075664	99	29	27,2	cyclictest	2263052	-21	kworker/u16:2+flush-8:0	22:31:13	5
2075664	99	29	27,2	cyclictest	2252697	-21	kworker/u16:0+events_unbound	23:10:02	5
2075664	99	29	27,2	cyclictest	2252697	-21	kworker/u16:0+events_unbound	23:10:02	5
2075657	99	29	27,2	cyclictest	2515600	-21	kworker/u16:3+flush-8:0	23:58:25	4
2075669	99	28	26,1	cyclictest	0	-21	swapper/7	22:53:17	7
2075666	99	28	26,2	cyclictest	2552447	-21	kworker/u16:1+flush-8:0	22:48:29	6
2075664	99	28	26,2	cyclictest	2515600	-21	kworker/u16:3+flush-8:0	23:43:49	5
2075664	99	28	26,2	cyclictest	2515600	-21	kworker/u16:3+flush-8:0	22:34:17	5
2075664	99	28	26,2	cyclictest	2252697	-21	kworker/u16:0+flush-8:0	23:07:14	5
2075664	99	28	26,2	cyclictest	2252697	-21	kworker/u16:0+events_unbound	23:28:02	5
2075664	99	28	26,2	cyclictest	2243078	-21	kworker/u16:3+events_unbound	21:45:13	5
2075664	99	28	26,2	cyclictest	2243078	-21	kworker/u16:3+events_unbound	21:45:13	5
2075664	99	28	26,2	cyclictest	2136643	-21	kworker/u16:3+events_unbound	19:58:01	5
2349409	2	27	0,0	chrt	0	-21	swapper/5	21:23:21	5
2075669	99	27	26,0	cyclictest	0	-21	swapper/7	00:01:28	7
2075664	99	27	25,2	cyclictest	2252697	-21	kworker/u16:0+events_unbound	21:52:13	5
2075664	99	27	25,2	cyclictest	2252697	-21	kworker/u16:0+events_unbound	21:15:13	5
2075664	99	27	24,2	cyclictest	2089300	-21	kworker/u16:0+flush-8:0	20:08:05	5
2075657	99	27	25,2	cyclictest	2767567	-21	kworker/u16:0+flush-8:0	00:28:32	4
2075669	99	26	23,2	cyclictest	2525357	-21	ssh	22:33:33	7
2075664	99	26	24,2	cyclictest	2515600	-21	kworker/u16:3+events_unbound	23:34:24	5
2075664	99	26	24,2	cyclictest	2263052	-21	kworker/u16:2+events_unbound	21:09:02	5
2075657	99	26	22,3	cyclictest	2695355	-21	kworker/u16:1+flush-8:0	23:48:21	4
2075664	99	25	23,2	cyclictest	2263052	-21	kworker/u16:2+events_unbound	21:40:06	5
2075664	99	25	23,2	cyclictest	2243078	-21	kworker/u16:3+events_unbound	21:59:05	5
2075664	99	25	23,2	cyclictest	2243078	-21	kworker/u16:3+events_unbound	21:22:42	5
2075657	99	25	22,2	cyclictest	2089300	-21	kworker/u16:0+flush-8:0	19:43:19	4
2075664	99	24	22,2	cyclictest	2635246	-21	kworker/u16:2+events_unbound	23:51:10	5
2075664	99	24	22,2	cyclictest	2075406	-21	kworker/u16:1+events_unbound	19:33:26	5
2075664	99	24	21,2	cyclictest	2515600	-21	kworker/u16:3+events_unbound	00:15:38	5
2075669	99	23	22,0	cyclictest	0	-21	swapper/7	21:08:44	7
2075669	99	23	0,21	cyclictest	2491486	-21	latency_hist	22:23:03	7
2075664	99	23	21,2	cyclictest	2089300	-21	kworker/u16:0+events_unbound	19:13:14	5
2075657	99	23	21,2	cyclictest	1992173	-21	kworker/u16:2+events_unbound	19:28:29	4
2075664	99	22	20,2	cyclictest	2252697	-21	kworker/u16:0+events_unbound	20:43:24	5
2075657	99	22	20,2	cyclictest	2252697	-21	kworker/u16:0+flush-8:0	20:56:30	4
2075669	99	21	15,5	cyclictest	635	-21	systemd-journal	23:51:25	7
2075669	99	21	14,5	cyclictest	635	-21	systemd-journal	00:38:03	7
2075664	99	21	19,2	cyclictest	2089300	-21	kworker/u16:0+events_unbound	19:52:15	5
2075664	99	21	18,2	cyclictest	1992173	-21	kworker/u16:2+events_unbound	19:08:07	5
2075657	99	21	19,2	cyclictest	2263052	-21	kworker/u16:2+events_unbound	21:03:18	4
2075657	99	21	19,2	cyclictest	2263052	-21	kworker/u16:2+events_unbound	21:03:18	4
2075657	99	21	19,2	cyclictest	2252697	-21	kworker/u16:0+flush-8:0	21:33:30	4
2075657	99	21	19,2	cyclictest	2089300	-21	kworker/u16:0+events_unbound	19:18:17	4
2075666	99	20	16,4	cyclictest	2515600	-21	kworker/u16:3+flush-8:0	23:28:34	6
2075657	99	20	18,2	cyclictest	2515600	-21	kworker/u16:3+events_unbound	22:43:27	4
2075669	99	19	0,17	cyclictest	827	-21	dbus-daemon	00:08:03	7
2075664	99	19	17,2	cyclictest	2185242	-21	kworker/u16:1+events_unbound	20:29:15	5
2075669	99	18	17,0	cyclictest	0	-21	swapper/7	20:28:25	7
2075669	99	18	16,1	cyclictest	0	-21	swapper/7	00:23:20	7
2075669	99	18	0,17	cyclictest	0	-21	swapper/7	21:18:28	7
2075664	99	18	17,1	cyclictest	2136643	-21	kworker/u16:3+events_unbound	19:38:19	5
2075657	99	18	16,2	cyclictest	2252697	-21	kworker/u16:0+flush-8:0	22:53:29	4
2075657	99	18	16,2	cyclictest	2089300	-21	kworker/u16:0+flush-8:0	20:18:19	4
2075669	99	17	16,0	cyclictest	0	-21	swapper/7	23:13:17	7
2075669	99	17	14,2	cyclictest	1234	-21	snmpd	21:33:29	7
2075669	99	17	14,2	cyclictest	0	-21	swapper/7	20:43:05	7
2075669	99	17	13,3	cyclictest	1234	-21	snmpd	19:16:19	7
2075664	99	17	15,2	cyclictest	2185242	-21	kworker/u16:1+events_unbound	20:05:15	5
2075664	99	17	15,2	cyclictest	2136643	-21	kworker/u16:3+flush-8:0	19:59:04	5
2075657	99	17	14,2	cyclictest	2136643	-21	kworker/u16:3+flush-8:0	20:13:20	4
2075669	99	16	8,7	cyclictest	6895	-21	gmain	20:13:25	7
2075669	99	16	15,0	cyclictest	0	-21	swapper/7	21:43:31	7
2075669	99	16	15,0	cyclictest	0	-21	swapper/7	21:43:31	7
2075669	99	16	14,1	cyclictest	0	-21	swapper/7	21:28:19	7
2075669	99	16	13,2	cyclictest	0	-21	swapper/7	23:08:04	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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