OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
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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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Thu Aug 20, 2026 00:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
132495	2	187	0,5	sleep3	0	-21	swapper/3	19:47:45	3
280126	2	119	0,3	chrt	0	-21	swapper/3	22:17:45	3
220684	2	77	0,5	chrt	0	-21	swapper/2	21:17:45	2
92909	99	74	64,6	cyclictest	382843	-21	turbostat.cron	00:00:00	1
275431	2	71	0,7	chrt	29	1	ktimers/1	22:12:46	1
92909	99	70	62,6	cyclictest	382828	-21	kworker/u8:3+flush-8:0	00:08:04	1
92909	99	66	60,4	cyclictest	119450	-21	kworker/u8:0+flush-8:0	19:45:01	1
148743	2	66	0,5	chrt	0	-21	swapper/1	20:02:48	1
92907	99	62	52,7	cyclictest	298552	-21	latency_hist	22:35:01	0
92907	99	59	53,4	cyclictest	412884	-21	latency_hist	00:30:01	0
92909	99	57	51,3	cyclictest	164253	-21	kworker/u8:2+flush-8:0	20:27:56	1
92909	99	57	47,7	cyclictest	398040	-21	kworker/u8:1+flush-8:0	00:22:50	1
92907	99	57	47,7	cyclictest	248835	-21	latency_hist	21:45:01	0
92909	99	56	45,8	cyclictest	119450	-21	kworker/u8:0+flush-8:0	19:57:51	1
186662	2	56	0,4	sleep1	28	1	rcuc/1	20:42:45	1
92909	99	54	47,5	cyclictest	248798	-21	kworker/u8:0+flush-8:0	21:52:48	1
92909	99	54	44,7	cyclictest	184416	-21	kworker/u8:1+flush-8:0	22:02:53	1
92909	99	54	44,7	cyclictest	184416	-21	kworker/u8:1+flush-8:0	22:02:53	1
92907	99	54	45,6	cyclictest	92757	-21	latency_hist	19:10:01	0
92909	99	53	46,5	cyclictest	372681	-21	kworker/u8:0+flush-8:0	23:52:51	1
92912	99	51	45,4	cyclictest	189751	-21	kworker/u8:2+flush-8:0	21:32:50	2
92909	99	51	42,6	cyclictest	367920	-21	latency_hist	23:45:00	1
92907	99	51	42,7	cyclictest	275	-21	systemd-journal	20:40:01	0
92909	99	50	45,4	cyclictest	128983	-21	kworker/u8:3+events_unbound	19:47:43	1
396524	2	50	0,2	sleep2	0	-21	swapper/2	00:12:49	2
92909	99	49	43,4	cyclictest	189751	-21	kworker/u8:2+events_unbound	21:42:50	1
92909	99	49	43,4	cyclictest	179068	-21	kworker/u8:3+events_unbound	21:00:01	1
92907	99	49	40,6	cyclictest	253764	-21	latency_hist	21:50:01	0
360871	2	48	0,2	sleep3	575	-21	kworker/3:2+events	23:37:43	3
92912	99	47	43,3	cyclictest	372681	-21	kworker/u8:0+events_unbound	00:10:01	2
92912	99	47	42,4	cyclictest	92114	-21	kworker/u8:1+events_unbound	19:30:00	2
92909	99	47	44,2	cyclictest	184416	-21	kworker/u8:1+flush-8:0	22:37:55	1
92909	99	47	42,3	cyclictest	184416	-21	kworker/u8:1+events_unbound	20:52:55	1
92909	99	47	40,5	cyclictest	184416	-21	kworker/u8:1+flush-8:0	22:42:56	1
92909	99	47	40,5	cyclictest	119450	-21	kworker/u8:0+events_unbound	19:37:38	1
92909	99	46	42,3	cyclictest	328203	-21	kworker/u8:2+flush-8:0	00:12:57	1
92909	99	46	41,4	cyclictest	119450	-21	kworker/u8:0+events_unbound	20:12:53	1
92909	99	46	41,4	cyclictest	119450	-21	kworker/u8:0+events_unbound	20:12:53	1
92909	99	46	40,4	cyclictest	248798	-21	kworker/u8:0+events_unbound	22:07:39	1
92909	99	45	40,4	cyclictest	407830	-21	kworker/u8:3+flush-8:0	00:40:00	1
92912	99	43	38,4	cyclictest	362218	-21	kworker/u8:3+flush-8:0	23:37:52	2
92912	99	43	38,4	cyclictest	208805	-21	kworker/u8:0+flush-8:0	21:07:57	2
92909	99	43	38,4	cyclictest	348313	-21	kworker/u8:1+events_unbound	23:32:44	1
92909	99	43	33,8	cyclictest	292841	-21	ntpq	22:27:48	1
92907	99	43	37,4	cyclictest	328203	-21	kworker/u8:2+events_unbound	00:20:01	0
92912	99	42	37,4	cyclictest	144326	-21	kworker/u8:3+flush-8:0	20:02:54	2
92909	99	42	37,3	cyclictest	134834	-21	kworker/u8:1+events_unbound	19:52:45	1
92909	99	42	36,4	cyclictest	119450	-21	kworker/u8:0+events_unbound	20:17:52	1
92909	99	42	35,5	cyclictest	184416	-21	kworker/u8:1+flush-8:0	23:12:49	1
92909	99	41	35,5	cyclictest	78462	-21	kworker/u8:3+events_unbound	19:15:05	1
92909	99	41	35,4	cyclictest	362218	-21	kworker/u8:3+events_unbound	23:47:52	1
92909	99	41	35,4	cyclictest	362218	-21	kworker/u8:3+events_unbound	23:47:52	1
92909	99	41	34,5	cyclictest	92114	-21	kworker/u8:1+flush-8:0	19:22:55	1
92909	99	41	34,5	cyclictest	298306	-21	kworker/u8:3+events_unbound	23:02:48	1
92909	99	41	34,5	cyclictest	169295	-21	kworker/u8:0+flush-8:0	20:32:42	1
92912	99	40	35,4	cyclictest	278376	-21	kworker/u8:0+flush-8:0	22:23:15	2
92909	99	40	34,4	cyclictest	78462	-21	kworker/u8:3+events_unbound	19:13:07	1
92909	99	40	34,4	cyclictest	278376	-21	kworker/u8:0+flush-8:0	22:57:57	1
92909	99	40	34,4	cyclictest	179068	-21	kworker/u8:3+flush-8:0	20:37:50	1
92909	99	40	32,6	cyclictest	308868	-21	kworker/u8:2+flush-8:0	22:47:48	1
92909	99	40	31,6	cyclictest	348087	-21	latency_hist	23:25:01	1
92907	99	40	31,7	cyclictest	278504	-21	latency_hist	22:15:01	0
92907	99	40	31,7	cyclictest	275	-21	systemd-journal	20:00:00	0
92907	99	40	1,37	cyclictest	372871	-21	unin-run	23:50:00	0
92907	99	40	1,37	cyclictest	372871	-21	unin-run	23:50:00	0
310559	2	40	0,5	sleep3	45	1	irq_work/3	22:47:43	3
92909	99	39	34,4	cyclictest	278376	-21	kworker/u8:0+events_unbound	22:17:53	1
92909	99	39	34,3	cyclictest	92114	-21	kworker/u8:1+flush-8:0	19:32:47	1
92909	99	39	33,4	cyclictest	372681	-21	kworker/u8:0+events_unbound	00:02:41	1
92909	99	39	32,5	cyclictest	328203	-21	kworker/u8:2+flush-8:0	00:17:56	1
92907	99	39	29,8	cyclictest	275	-21	systemd-journal	20:30:00	0
92907	99	39	29,8	cyclictest	224788	-21	diskstats	21:22:40	0
261099	2	39	0,7	sleep3	45	1	irq_work/3	21:57:47	3
92909	99	38	33,4	cyclictest	248798	-21	kworker/u8:0+events_unbound	21:47:45	1
92909	99	38	33,4	cyclictest	219496	-21	kworker/u8:0+flush-8:0	21:22:48	1
92909	99	38	32,4	cyclictest	288523	-21	kworker/u8:2+flush-8:0	22:32:43	1
92909	99	38	31,5	cyclictest	372681	-21	kworker/u8:0+events_unbound	00:32:49	1
92909	99	38	31,5	cyclictest	224083	-21	latency_hist	21:20:01	1
92909	99	38	31,5	cyclictest	184416	-21	kworker/u8:1+flush-8:0	22:00:00	1
92912	99	37	33,3	cyclictest	342942	-21	kworker/u8:3+flush-8:0	23:22:52	2
92912	99	37	26,8	cyclictest	275	-21	systemd-journal	19:57:48	2
92909	99	37	32,4	cyclictest	348313	-21	kworker/u8:1+flush-8:0	23:37:41	1
92909	99	37	31,4	cyclictest	110856	-21	irqrtprio	19:27:44	1
92907	99	37	31,4	cyclictest	184416	-21	kworker/u8:1+flush-8:0	22:17:42	0
92907	99	37	25,9	cyclictest	407955	-21	latency_hist	00:25:01	0
92912	99	36	31,4	cyclictest	271101	-21	kworker/u8:2+flush-8:0	22:07:50	2
92909	99	36	30,5	cyclictest	189751	-21	kworker/u8:2+flush-8:0	21:12:51	1
92907	99	36	27,7	cyclictest	254180	-21	/usr/sbin/munin	21:52:49	0
92912	99	35	30,3	cyclictest	119450	-21	kworker/u8:0+flush-8:0	19:52:53	2
92909	99	35	30,4	cyclictest	348313	-21	kworker/u8:1+flush-8:0	23:27:40	1
92909	99	35	30,4	cyclictest	184416	-21	kworker/u8:1+flush-8:0	20:47:44	1
92909	99	35	30,3	cyclictest	184416	-21	kworker/u8:1+flush-8:0	21:02:45	1
92909	99	35	28,5	cyclictest	213916	-21	latency_hist	21:10:01	1
92907	99	35	30,4	cyclictest	179068	-21	kworker/u8:3+flush-8:0	20:52:43	0
92907	99	35	26,7	cyclictest	194114	-21	latency_hist	20:50:01	0
92909	99	34	28,4	cyclictest	228867	-21	kworker/u8:3+flush-8:0	21:37:46	1
92907	99	34	30,3	cyclictest	169295	-21	kworker/u8:0+flush-8:0	20:34:34	0
92907	99	34	24,8	cyclictest	118837	-21	ntpq	19:32:51	0
92912	99	33	28,4	cyclictest	412827	-21	kworker/u8:1+events_unbound	00:37:57	2
92912	99	33	28,4	cyclictest	348313	-21	kworker/u8:1+events_unbound	23:32:46	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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