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 Sep 03, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2964817	2	102	0,1	sleep7	2964794	-21	ssh	09:29:54	7
3336179	2	59	0,0	sleep4	0	-21	swapper/4	12:00:01	4
2668666	2	53	18,30	sleep7	0	-21	swapper/7	07:05:40	7
2668873	2	52	42,7	sleep5	0	-21	swapper/5	07:08:34	5
2668881	2	48	37,8	sleep4	0	-21	swapper/4	07:08:41	4
2669245	99	43	40,2	cyclictest	3166034	-21	kworker/u16:2+events_unbound	12:09:31	5
2669245	99	43	39,4	cyclictest	2897000	-21	kworker/u16:2+flush-8:0	09:14:28	5
2669245	99	42	40,2	cyclictest	3153751	-21	kworker/u16:1+events_unbound	11:00:30	5
2669245	99	40	38,2	cyclictest	3363665	-21	kworker/u16:4+flush-8:0	12:25:18	5
2668902	2	40	16,8	sleep6	0	-21	swapper/6	07:09:00	6
2669245	99	39	37,2	cyclictest	3226646	-21	kworker/u16:1+events_unbound	11:35:19	5
2669245	99	37	35,2	cyclictest	3166034	-21	kworker/u16:2+events_unbound	11:59:43	5
2669245	99	37	35,2	cyclictest	3091874	-21	kworker/u16:4+events_unbound	10:35:02	5
2669245	99	37	35,2	cyclictest	3015755	-21	kworker/u16:3+events_unbound	10:49:18	5
2669245	99	37	34,2	cyclictest	3389866	-21	kworker/u16:0+events_unbound	12:34:30	5
2669245	99	37	34,2	cyclictest	3091874	-21	kworker/u16:4+events_unbound	10:39:30	5
2669245	99	36	34,2	cyclictest	3166034	-21	kworker/u16:2+flush-8:0	11:59:28	5
2669245	99	36	33,2	cyclictest	3015755	-21	kworker/u16:3+events_unbound	10:49:30	5
2669245	99	35	33,2	cyclictest	3226646	-21	kworker/u16:1+events_unbound	11:32:39	5
2669245	99	35	33,2	cyclictest	3200368	-21	kworker/u16:3+events_unbound	11:18:39	5
2669245	99	35	33,2	cyclictest	3003165	-21	kworker/u16:0+events_unbound	10:01:35	5
2669245	99	34	33,1	cyclictest	3301819	-21	kworker/u16:3+events_unbound	12:04:30	5
2669245	99	34	32,2	cyclictest	3140343	-21	kworker/u16:0+events_unbound	11:11:03	5
2669245	99	34	31,2	cyclictest	3350801	-21	kworker/u16:1+events_unbound	12:14:30	5
2669245	99	33	31,2	cyclictest	3301819	-21	kworker/u16:3+events_unbound	12:19:43	5
2669245	99	33	31,2	cyclictest	3252358	-21	kworker/u16:0+events_unbound	11:46:18	5
2669245	99	33	31,2	cyclictest	3166034	-21	kworker/u16:2+events_unbound	11:05:23	5
2669245	99	33	31,2	cyclictest	3166034	-21	kworker/u16:2+events_unbound	11:05:23	5
2669245	99	33	31,2	cyclictest	3015755	-21	kworker/u16:3+events_unbound	10:34:19	5
2669245	99	33	31,2	cyclictest	3015755	-21	kworker/u16:3+events_unbound	10:05:39	5
2669245	99	33	31,2	cyclictest	2703147	-21	kworker/u16:0+flush-8:0	07:34:28	5
2669245	99	33	31,2	cyclictest	2669434	-21	kworker/u16:1+flush-8:0	07:39:28	5
2669245	99	33	30,2	cyclictest	3227752	-21	kworker/u16:4+events_unbound	11:24:30	5
2669250	99	32	26,5	cyclictest	3400583	-21	latency_hist	12:29:28	7
2669245	99	32	30,2	cyclictest	3015755	-21	kworker/u16:3+events_unbound	10:17:54	5
2669245	99	31	29,2	cyclictest	2928607	-21	kworker/u16:1+events_unbound	09:47:21	5
2669245	99	31	29,2	cyclictest	2928607	-21	kworker/u16:1+events_unbound	09:47:21	5
2669245	99	31	29,2	cyclictest	2928607	-21	kworker/u16:1+events_unbound	09:35:39	5
2669245	99	30	28,2	cyclictest	3389866	-21	kworker/u16:0+flush-8:0	12:30:07	5
2669245	99	30	28,2	cyclictest	3252358	-21	kworker/u16:0+events_unbound	11:51:46	5
2669245	99	30	28,2	cyclictest	3200368	-21	kworker/u16:3+events_unbound	11:21:38	5
2669245	99	30	28,2	cyclictest	3015755	-21	kworker/u16:3+events_unbound	10:20:58	5
2669245	99	30	28,2	cyclictest	3003165	-21	kworker/u16:0+events_unbound	10:10:34	5
2669250	99	29	23,5	cyclictest	3252322	-21	latency_hist	11:29:28	7
2669245	99	29	27,2	cyclictest	3226646	-21	kworker/u16:1+events_unbound	11:40:38	5
2669245	99	29	27,2	cyclictest	2928607	-21	kworker/u16:1+events_unbound	09:33:07	5
2669245	99	29	27,2	cyclictest	2897000	-21	kworker/u16:2+events_unbound	09:50:38	5
2669245	99	29	27,2	cyclictest	2897000	-21	kworker/u16:2+events_unbound	09:15:47	5
2669245	99	28	26,2	cyclictest	2928607	-21	kworker/u16:1+events_unbound	09:27:44	5
2669245	99	28	26,2	cyclictest	2867820	-21	kworker/u16:0+events_unbound	09:21:19	5
3213814	2	27	0,1	chrt	3213812	-21	ssh	11:11:55	7
3079014	2	27	0,1	chrt	3079011	-21	ssh	10:18:50	7
2669245	99	27	25,2	cyclictest	2669435	-21	kworker/u16:4+flush-8:0	07:14:24	5
3252825	2	26	0,1	chrt	3252826	-21	sh	11:29:43	7
2669247	99	26	22,3	cyclictest	2703147	-21	kworker/u16:0+events_unbound	08:06:58	6
2669245	99	26	24,2	cyclictest	3153751	-21	kworker/u16:1+events_unbound	10:54:58	5
2669245	99	26	24,2	cyclictest	2989611	-21	kworker/u16:3+events_unbound	09:44:27	5
2669241	99	26	25,1	cyclictest	3226646	-21	kworker/u16:1+events_unbound	11:37:28	4
2669250	99	25	24,0	cyclictest	0	-21	swapper/7	12:14:23	7
2669247	99	25	23,2	cyclictest	2928607	-21	kworker/u16:1+events_unbound	09:29:59	6
2669245	99	25	23,2	cyclictest	3015755	-21	kworker/u16:3+flush-8:0	10:25:24	5
2669245	99	25	23,2	cyclictest	3015755	-21	kworker/u16:3+flush-8:0	10:25:24	5
2669245	99	25	23,2	cyclictest	2928607	-21	kworker/u16:1+events_unbound	09:57:58	5
2669241	99	25	23,2	cyclictest	2867820	-21	kworker/u16:0+events_unbound	08:54:43	4
2669250	99	24	19,4	cyclictest	3141205	-21	latency_hist	10:44:28	7
2669250	99	24	18,5	cyclictest	2943462	-21	latency_hist	09:24:29	7
2669245	99	24	22,2	cyclictest	2837268	-21	kworker/u16:3+flush-8:0	08:45:20	5
2669245	99	24	22,2	cyclictest	2789346	-21	kworker/u16:5+flush-8:0	08:24:39	5
2669245	99	24	22,2	cyclictest	1985015	-21	kworker/u16:2+events_unbound	07:19:46	5
2669241	99	23	21,2	cyclictest	3003165	-21	kworker/u16:0+events_unbound	10:18:04	4
2669250	99	22	17,4	cyclictest	1017	-21	in:imjournal	11:44:23	7
2669250	99	22	16,5	cyclictest	2750563	-21	latency_hist	07:49:29	7
2669245	99	22	20,2	cyclictest	2770395	-21	kworker/u16:3+flush-8:0	08:00:39	5
2669250	99	21	20,0	cyclictest	0	-21	swapper/7	08:04:43	7
2669247	99	21	19,2	cyclictest	3030094	-21	kworker/u16:5+flush-8:0	10:14:28	6
2669247	99	21	19,2	cyclictest	2928607	-21	kworker/u16:1+events_unbound	09:49:59	6
2669247	99	21	17,3	cyclictest	3015755	-21	kworker/u16:3+events_unbound	10:49:41	6
2669245	99	21	19,2	cyclictest	2896994	-21	kworker/u16:1+events_unbound	09:04:35	5
2669250	99	20	18,1	cyclictest	3412938	-21	munin-run	12:34:27	7
2669250	99	20	15,4	cyclictest	3190621	-21	latency_hist	11:04:28	7
2669245	99	20	18,2	cyclictest	2669435	-21	kworker/u16:4+flush-8:0	07:39:47	5
2669250	99	19	13,5	cyclictest	2980600	-21	latency_hist	09:39:28	7
2669245	99	19	17,2	cyclictest	2799260	-21	kworker/u16:1+flush-8:0	08:16:49	5
2669245	99	19	17,2	cyclictest	2703147	-21	kworker/u16:0+flush-8:0	08:40:03	5
2669245	99	19	17,2	cyclictest	2669435	-21	kworker/u16:4+events_unbound	07:44:39	5
2669245	99	19	16,2	cyclictest	2703147	-21	kworker/u16:0+events_unbound	08:29:40	5
2669245	99	19	14,3	cyclictest	2703147	-21	kworker/u16:0+events_unbound	07:24:45	5
2669250	99	18	16,1	cyclictest	0	-21	swapper/7	07:24:53	7
2669250	99	18	13,4	cyclictest	648	-21	systemd-journal	11:39:23	7
2669247	99	18	14,3	cyclictest	2818997	-21	kworker/u16:2+flush-8:0	08:39:46	6
2669250	99	17	14,2	cyclictest	1277	-21	snmpd	08:49:16	7
2669250	99	17	0,1	cyclictest	0	-21	swapper/7	09:04:53	7
2669247	99	17	8,8	cyclictest	0	-21	swapper/6	08:19:44	6
2669247	99	17	8,8	cyclictest	0	-21	swapper/6	08:19:44	6
2669247	99	17	15,2	cyclictest	2928607	-21	kworker/u16:1+flush-8:0	09:29:29	6
2669247	99	17	14,2	cyclictest	2837268	-21	kworker/u16:3+flush-8:0	08:34:28	6
2669247	99	17	13,3	cyclictest	2927932	-21	ps	09:14:54	6
2669245	99	17	15,2	cyclictest	2703147	-21	kworker/u16:0+events_unbound	07:57:39	5
2669245	99	17	14,2	cyclictest	2799260	-21	kworker/u16:1+events_unbound	08:19:30	5
2669245	99	17	14,2	cyclictest	2799260	-21	kworker/u16:1+events_unbound	08:19:30	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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