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 Jul 09, 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
633098	2	58	48,7	sleep4	0	-21	swapper/4	19:09:08	4
633459	99	42	37,4	cyclictest	1213813	-21	latency_hist	23:29:50	7
632903	2	40	4,30	sleep7	0	-21	swapper/7	19:06:22	7
633449	99	37	35,2	cyclictest	969416	-21	kworker/u16:2+events_unbound	21:53:08	4
633449	99	37	35,2	cyclictest	1018024	-21	kworker/u16:2+events_unbound	22:47:49	4
633449	99	37	34,2	cyclictest	1018024	-21	kworker/u16:2+events_unbound	22:18:17	4
633449	99	36	34,2	cyclictest	1152697	-21	kworker/u16:3+events_unbound	23:37:49	4
633449	99	36	34,2	cyclictest	1152697	-21	kworker/u16:3+events_unbound	23:37:49	4
633449	99	36	34,2	cyclictest	1116354	-21	kworker/u16:1+events_unbound	23:07:04	4
633449	99	35	33,2	cyclictest	993562	-21	kworker/u16:5+events_unbound	22:57:49	4
633449	99	35	33,2	cyclictest	993562	-21	kworker/u16:5+events_unbound	22:57:49	4
633449	99	35	33,2	cyclictest	1325666	-21	kworker/u16:2+events_unbound	00:37:16	4
633449	99	35	33,2	cyclictest	1201705	-21	kworker/u16:4+events_unbound	23:49:29	4
633449	99	35	32,2	cyclictest	1018024	-21	kworker/u16:2+events_unbound	23:20:00	4
633453	99	34	30,3	cyclictest	942107	-21	kworker/u16:0+flush-8:0	22:24:56	5
633449	99	34	32,2	cyclictest	993562	-21	kworker/u16:5+events_unbound	22:29:37	4
633449	99	34	32,2	cyclictest	991110	-21	kworker/u16:1+events_unbound	21:58:13	4
633449	99	34	32,2	cyclictest	775114	-21	kworker/u16:1+events_unbound	21:38:01	4
633449	99	34	32,2	cyclictest	1262945	-21	kworker/u16:0+events_unbound	23:58:20	4
633449	99	34	32,2	cyclictest	1262945	-21	kworker/u16:0+events_unbound	23:51:40	4
632891	2	34	23,8	sleep6	0	-21	swapper/6	19:06:13	6
633459	99	33	32,0	cyclictest	0	-21	swapper/7	21:49:53	7
633459	99	33	31,1	cyclictest	1018421	-21	ssh	22:09:57	7
633459	99	33	31,1	cyclictest	1018421	-21	ssh	22:09:57	7
633454	99	33	31,2	cyclictest	1190658	-21	kworker/u16:0+events_unbound	23:35:03	6
633454	99	33	31,2	cyclictest	1190658	-21	kworker/u16:0+events_unbound	23:35:03	6
633453	99	33	29,4	cyclictest	1116354	-21	kworker/u16:1+events_unbound	22:54:51	5
633449	99	33	31,2	cyclictest	870295	-21	kworker/u16:3+flush-8:0	22:43:08	4
633449	99	33	31,2	cyclictest	870295	-21	kworker/u16:3+events_unbound	22:23:08	4
633449	99	33	31,2	cyclictest	870295	-21	kworker/u16:3+events_unbound	21:47:28	4
633449	99	33	31,2	cyclictest	870295	-21	kworker/u16:3+events_unbound	21:41:21	4
633449	99	33	31,2	cyclictest	1201705	-21	kworker/u16:4+events_unbound	00:12:52	4
633449	99	33	31,2	cyclictest	1201705	-21	kworker/u16:4+events_unbound	00:09:48	4
633453	99	32	30,2	cyclictest	665148	-21	kworker/u16:1+flush-8:0	19:54:51	5
633449	99	32	30,2	cyclictest	1201705	-21	kworker/u16:4+events_unbound	23:44:04	4
633449	99	32	30,2	cyclictest	1018024	-21	kworker/u16:2+events_unbound	23:27:53	4
633449	99	32	30,2	cyclictest	1018024	-21	kworker/u16:2+events_unbound	23:18:01	4
633449	99	32	29,2	cyclictest	942107	-21	kworker/u16:0+events_unbound	22:13:20	4
633449	99	32	29,2	cyclictest	942107	-21	kworker/u16:0+events_unbound	22:13:20	4
633449	99	31	29,2	cyclictest	870295	-21	kworker/u16:3+events_unbound	22:31:01	4
633449	99	31	29,2	cyclictest	870295	-21	kworker/u16:3+events_unbound	22:04:28	4
633449	99	31	29,2	cyclictest	763807	-21	kworker/u16:0+events_unbound	21:21:56	4
633449	99	31	29,2	cyclictest	1325666	-21	kworker/u16:2+events_unbound	00:31:40	4
633449	99	31	29,2	cyclictest	1325666	-21	kworker/u16:2+events_unbound	00:24:24	4
633449	99	31	29,2	cyclictest	1018024	-21	kworker/u16:2+events_unbound	23:14:16	4
633449	99	31	28,2	cyclictest	1116354	-21	kworker/u16:1+flush-8:0	23:01:44	4
633120	2	31	20,8	sleep5	0	-21	swapper/5	19:09:25	5
633459	99	30	27,1	cyclictest	1177089	-21	perf	23:14:51	7
633449	99	30	28,2	cyclictest	1152697	-21	kworker/u16:3+events_unbound	00:28:20	4
633449	99	30	28,2	cyclictest	1101507	-21	kworker/u16:0+events_unbound	22:51:44	4
633449	99	30	28,2	cyclictest	1018024	-21	kworker/u16:2+events_unbound	23:32:40	4
633449	99	30	27,2	cyclictest	870295	-21	kworker/u16:3+events_unbound	21:18:50	4
633453	99	29	27,2	cyclictest	1152697	-21	kworker/u16:3+events_unbound	00:35:05	5
633449	99	29	27,2	cyclictest	993562	-21	kworker/u16:5+events_unbound	22:07:49	4
633449	99	29	27,2	cyclictest	775114	-21	kworker/u16:1+events_unbound	21:13:57	4
633449	99	29	27,2	cyclictest	763807	-21	kworker/u16:0+events_unbound	21:26:04	4
633449	99	29	26,2	cyclictest	942107	-21	kworker/u16:0+events_unbound	22:35:01	4
633453	99	28	26,2	cyclictest	613429	-21	kworker/u16:0+flush-8:0	19:10:17	5
633449	99	28	26,2	cyclictest	895520	-21	kworker/u16:4+events_unbound	21:31:40	4
633449	99	28	26,2	cyclictest	665148	-21	kworker/u16:1+events_unbound	20:00:52	4
633449	99	28	26,2	cyclictest	665148	-21	kworker/u16:1+events_unbound	20:00:52	4
633459	99	27	21,5	cyclictest	812547	-21	latency_hist	20:39:51	7
633454	99	27	21,6	cyclictest	895520	-21	kworker/u16:4+events_unbound	21:32:45	6
633453	99	27	25,2	cyclictest	993562	-21	kworker/u16:5+flush-8:0	22:39:51	5
633453	99	27	25,2	cyclictest	665148	-21	kworker/u16:1+flush-8:0	19:30:09	5
633453	99	27	24,2	cyclictest	743256	-21	kworker/u16:6+flush-8:0	20:05:06	5
633449	99	27	25,2	cyclictest	1201705	-21	kworker/u16:4+events_unbound	00:02:44	4
633459	99	26	24,1	cyclictest	1043826	-21	ssh	22:20:06	7
633454	99	26	24,2	cyclictest	860509	-21	kworker/u16:4+events_unbound	21:06:57	6
633453	99	26	22,4	cyclictest	763807	-21	kworker/u16:0+flush-8:0	21:29:51	5
633449	99	26	24,2	cyclictest	1262945	-21	kworker/u16:0+events_unbound	00:17:41	4
633449	99	26	24,2	cyclictest	1262945	-21	kworker/u16:0+events_unbound	00:17:41	4
633449	99	26	23,2	cyclictest	665148	-21	kworker/u16:1+events_unbound	19:30:01	4
633459	99	25	23,1	cyclictest	0	-21	swapper/7	23:20:08	7
633459	99	25	23,1	cyclictest	0	-21	swapper/7	21:39:53	7
633453	99	25	23,2	cyclictest	942107	-21	kworker/u16:0+events_unbound	21:40:04	5
633449	99	25	23,2	cyclictest	569248	-21	kworker/u16:2+events_unbound	19:55:21	4
633459	99	24	22,1	cyclictest	0	-21	swapper/7	20:30:17	7
633459	99	24	19,3	cyclictest	906305	-21	ssh	21:22:17	7
633454	99	24	22,2	cyclictest	870295	-21	kworker/u16:3+events_unbound	22:36:25	6
633454	99	24	22,2	cyclictest	1018024	-21	kworker/u16:2+events_unbound	22:18:30	6
633454	99	24	21,2	cyclictest	743256	-21	kworker/u16:6+flush-8:0	20:29:56	6
633453	99	24	22,2	cyclictest	942107	-21	kworker/u16:0+events_unbound	22:04:52	5
633453	99	24	22,2	cyclictest	763807	-21	kworker/u16:0+events_unbound	20:35:17	5
633453	99	24	22,2	cyclictest	623468	-21	kworker/u16:3+flush-8:0	19:59:51	5
633449	99	24	22,2	cyclictest	665148	-21	kworker/u16:1+events_unbound	19:28:54	4
633449	99	24	21,2	cyclictest	763807	-21	kworker/u16:0+flush-8:0	20:15:05	4
633449	99	24	20,3	cyclictest	743256	-21	kworker/u16:6+events_unbound	20:10:01	4
633459	99	23	20,2	cyclictest	1077770	-21	ssh	22:32:17	7
633454	99	23	21,2	cyclictest	1116354	-21	kworker/u16:1+events_unbound	23:00:49	6
633453	99	23	21,2	cyclictest	665148	-21	kworker/u16:1+flush-8:0	20:00:21	5
633453	99	23	21,2	cyclictest	665148	-21	kworker/u16:1+flush-8:0	20:00:21	5
633453	99	23	21,2	cyclictest	1201705	-21	kworker/u16:4+flush-8:0	23:45:08	5
633453	99	23	21,2	cyclictest	1018024	-21	kworker/u16:2+flush-8:0	23:40:16	5
633453	99	23	21,2	cyclictest	1018024	-21	kworker/u16:2+flush-8:0	23:15:08	5
633449	99	23	21,2	cyclictest	804363	-21	kworker/u16:2+events_unbound	21:00:01	4
633449	99	23	21,2	cyclictest	743256	-21	kworker/u16:6+events_unbound	20:27:01	4
633449	99	23	20,2	cyclictest	763807	-21	kworker/u16:0+events_unbound	21:05:11	4
633459	99	22	21,0	cyclictest	0	-21	swapper/7	19:15:16	7
633459	99	22	20,1	cyclictest	0	-21	swapper/7	21:00:08	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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