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 Wed Sep 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
2768397	2	59	48,7	sleep5	0	-21	swapper/5	19:05:40	5
2768973	99	42	37,4	cyclictest	3103789	-21	latency_hist	21:49:35	7
2768962	99	42	40,2	cyclictest	3384657	-21	kworker/u16:1+events_unbound	00:30:08	4
2768962	99	41	39,2	cyclictest	3162408	-21	kworker/u16:0+events_unbound	23:04:36	4
2768610	2	40	5,30	sleep7	0	-21	swapper/7	19:08:39	7
2768962	99	39	36,2	cyclictest	2985720	-21	kworker/u16:3+events_unbound	21:19:37	4
2768962	99	39	36,2	cyclictest	2985720	-21	kworker/u16:3+events_unbound	21:19:37	4
2768973	99	37	36,0	cyclictest	0	-21	swapper/7	22:29:37	7
2768973	99	37	34,2	cyclictest	3513071	-21	cut	00:34:57	7
2768973	99	37	32,3	cyclictest	5701	-21	gnome-shell	21:58:33	7
2768962	99	37	34,2	cyclictest	3308972	-21	kworker/u16:3+events_unbound	00:14:51	4
2768962	99	37	34,2	cyclictest	3140364	-21	kworker/u16:4+events_unbound	22:19:37	4
2768962	99	36	34,2	cyclictest	3396802	-21	kworker/u16:5+events_unbound	00:25:44	4
2768962	99	36	34,2	cyclictest	3396802	-21	kworker/u16:5+events_unbound	00:01:44	4
2768962	99	36	33,2	cyclictest	2839858	-21	kworker/u16:2+events_unbound	20:49:37	4
2768483	2	36	25,8	sleep4	0	-21	swapper/4	19:06:51	4
2768973	99	35	33,1	cyclictest	3250682	-21	ssh	22:49:37	7
2768973	99	35	32,2	cyclictest	3370794	-21	ssh	23:36:45	7
2768457	2	35	25,7	sleep6	0	-21	swapper/6	19:06:29	6
2768962	99	34	32,2	cyclictest	3297553	-21	kworker/u16:1+events_unbound	23:22:21	4
2768962	99	34	32,2	cyclictest	2985720	-21	kworker/u16:3+events_unbound	21:52:17	4
2768962	99	34	32,2	cyclictest	2976584	-21	kworker/u16:0+events_unbound	21:47:18	4
2768962	99	34	31,2	cyclictest	3284030	-21	kworker/u16:2+events_unbound	23:13:45	4
2768973	99	33	32,0	cyclictest	0	-21	swapper/7	22:46:45	7
2768968	99	33	30,2	cyclictest	3333946	-21	kworker/u16:0+flush-8:0	23:44:34	6
2768962	99	33	31,2	cyclictest	3308972	-21	kworker/u16:3+events_unbound	23:50:45	4
2768962	99	33	31,2	cyclictest	3162408	-21	kworker/u16:0+events_unbound	22:36:16	4
2768973	99	32	31,0	cyclictest	0	-21	swapper/7	00:17:49	7
2768973	99	32	30,1	cyclictest	3455834	-21	ssh	00:11:01	7
2768973	99	32	30,1	cyclictest	3275151	-21	ssh	22:59:37	7
2768973	99	32	30,1	cyclictest	0	-21	swapper/7	21:35:21	7
2768968	99	32	28,3	cyclictest	2839858	-21	kworker/u16:2+flush-8:0	20:59:35	6
2768962	99	32	30,2	cyclictest	3077014	-21	kworker/u16:1+events_unbound	22:30:53	4
2768962	99	32	30,2	cyclictest	3077014	-21	kworker/u16:1+events_unbound	22:06:49	4
2768973	99	31	30,0	cyclictest	0	-21	swapper/7	21:50:44	7
2768973	99	31	28,2	cyclictest	2800861	-21	ntpq	19:20:00	7
2768973	99	31	27,3	cyclictest	3066915	-21	ssh	21:34:05	7
2768964	99	31	29,2	cyclictest	2985720	-21	kworker/u16:3+flush-8:0	21:50:23	5
2768962	99	31	29,2	cyclictest	3396802	-21	kworker/u16:5+events_unbound	00:36:25	4
2768962	99	31	29,2	cyclictest	3384657	-21	kworker/u16:1+events_unbound	23:59:17	4
2768962	99	31	29,2	cyclictest	3308972	-21	kworker/u16:3+events_unbound	00:12:05	4
2768962	99	31	29,2	cyclictest	3284030	-21	kworker/u16:2+events_unbound	23:43:29	4
2768962	99	31	29,2	cyclictest	3077014	-21	kworker/u16:1+events_unbound	22:41:32	4
2768962	99	31	29,2	cyclictest	3005049	-21	kworker/u16:1+events_unbound	21:16:45	4
2768973	99	30	29,0	cyclictest	0	-21	swapper/7	23:45:46	7
2768968	99	30	27,2	cyclictest	2937118	-21	kworker/u16:1+flush-8:0	20:44:34	6
2768962	99	30	28,2	cyclictest	3284030	-21	kworker/u16:2+events_unbound	23:46:45	4
2768962	99	30	28,2	cyclictest	3235790	-21	kworker/u16:4+flush-8:0	22:49:44	4
2768962	99	30	28,2	cyclictest	3224094	-21	kworker/u16:2+events_unbound	22:47:53	4
2768962	99	30	28,2	cyclictest	3112722	-21	kworker/u16:2+events_unbound	22:16:20	4
2768962	99	30	28,2	cyclictest	3015452	-21	kworker/u16:5+events_unbound	22:01:38	4
2768962	99	30	28,2	cyclictest	3015452	-21	kworker/u16:5+events_unbound	22:01:38	4
2768962	99	30	28,2	cyclictest	3005049	-21	kworker/u16:1+events_unbound	21:13:20	4
2768962	99	30	28,2	cyclictest	2976584	-21	kworker/u16:0+events_unbound	21:38:41	4
2768973	99	29	28,0	cyclictest	0	-21	swapper/7	22:18:01	7
2768973	99	29	28,0	cyclictest	0	-21	swapper/7	21:24:44	7
2768973	99	29	26,2	cyclictest	3006194	-21	diskmemload	00:23:25	7
2768973	99	29	25,3	cyclictest	3151000	-21	ssh	22:06:37	7
2768973	99	29	24,4	cyclictest	3140329	-21	latency_hist	22:04:34	7
2768973	99	29	24,4	cyclictest	3140329	-21	latency_hist	22:04:34	7
2768964	99	29	26,3	cyclictest	3336263	-21	kworker/u16:4+events_unbound	23:34:48	5
2768962	99	29	27,2	cyclictest	3308972	-21	kworker/u16:3+events_unbound	23:19:08	4
2768962	99	29	27,2	cyclictest	3308972	-21	kworker/u16:3+events_unbound	00:23:04	4
2768962	99	29	27,2	cyclictest	3162408	-21	kworker/u16:0+events_unbound	22:24:56	4
2768973	99	28	27,0	cyclictest	0	-21	swapper/7	23:27:40	7
2768973	99	28	26,1	cyclictest	0	-21	swapper/7	19:24:54	7
2768973	99	28	18,1	cyclictest	0	-21	swapper/7	23:49:58	7
2768962	99	28	26,2	cyclictest	3384657	-21	kworker/u16:1+events_unbound	00:07:28	4
2768962	99	28	26,2	cyclictest	3284030	-21	kworker/u16:2+events_unbound	23:36:41	4
2768962	99	28	26,2	cyclictest	3284030	-21	kworker/u16:2+events_unbound	23:01:28	4
2768962	99	28	26,2	cyclictest	3077014	-21	kworker/u16:1+events_unbound	22:11:21	4
2768962	99	28	26,2	cyclictest	2985720	-21	kworker/u16:3+events_unbound	21:56:08	4
2768962	99	28	26,2	cyclictest	2976584	-21	kworker/u16:0+events_unbound	21:27:40	4
2768962	99	28	26,2	cyclictest	2868914	-21	kworker/u16:5+events_unbound	20:36:45	4
2768973	99	27	26,0	cyclictest	0	-21	swapper/7	22:42:21	7
2768973	99	27	26,0	cyclictest	0	-21	swapper/7	22:13:41	7
2768973	99	27	26,0	cyclictest	0	-21	swapper/7	19:56:44	7
2768973	99	27	26,0	cyclictest	0	-21	swapper/7	19:56:44	7
2768973	99	27	26,0	cyclictest	0	-21	swapper/7	19:49:36	7
2768973	99	27	26,0	cyclictest	0	-21	swapper/7	19:34:46	7
2768964	99	27	25,2	cyclictest	3015452	-21	kworker/u16:5+events_unbound	22:04:48	5
2768964	99	27	25,2	cyclictest	2976584	-21	kworker/u16:0+flush-8:0	21:49:30	5
2768962	99	27	25,2	cyclictest	3308972	-21	kworker/u16:3+events_unbound	23:34:05	4
2768962	99	27	25,2	cyclictest	3284030	-21	kworker/u16:2+events_unbound	23:26:25	4
2768962	99	27	25,2	cyclictest	3077014	-21	kworker/u16:1+events_unbound	22:56:57	4
2768962	99	27	25,2	cyclictest	3042885	-21	kworker/u16:2+events_unbound	21:32:04	4
2768962	99	27	25,2	cyclictest	2976584	-21	kworker/u16:0+events_unbound	21:41:01	4
2768962	99	27	24,2	cyclictest	2860535	-21	kworker/u16:0+flush-8:0	19:54:45	4
2768962	99	27	24,2	cyclictest	2860535	-21	kworker/u16:0+flush-8:0	19:54:45	4
2768973	99	26	25,0	cyclictest	0	-21	swapper/7	22:25:13	7
2768973	99	26	25,0	cyclictest	0	-21	swapper/7	21:44:34	7
2768973	99	26	25,0	cyclictest	0	-21	swapper/7	19:14:55	7
2768973	99	26	24,1	cyclictest	0	-21	swapper/7	20:06:44	7
2768973	99	26	23,2	cyclictest	3432573	-21	ssh	00:03:08	7
2768973	99	26	23,2	cyclictest	3039675	-21	ssh	21:19:59	7
2768973	99	26	23,2	cyclictest	3039675	-21	ssh	21:19:59	7
2768973	99	26	20,5	cyclictest	2957471	-21	latency_hist	20:44:34	7
2768964	99	26	24,2	cyclictest	3336263	-21	kworker/u16:4+events_unbound	23:54:49	5
2768964	99	26	24,2	cyclictest	3308972	-21	kworker/u16:3+events_unbound	00:39:33	5
2768962	99	26	24,2	cyclictest	2714579	-21	kworker/u16:0+events_unbound	19:31:45	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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