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 Jan 22, 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
2376876	99	54	51,2	cyclictest	2830371	-21	kworker/u16:2+events_unbound	22:57:30	6
2376876	99	54	51,2	cyclictest	2830371	-21	kworker/u16:2+events_unbound	22:57:30	6
2376380	2	54	44,7	sleep6	0	-21	swapper/6	19:04:07	6
2376876	99	52	49,2	cyclictest	2805479	-21	kworker/u16:1+events_unbound	23:27:18	6
2376877	99	51	45,5	cyclictest	2457867	-21	latency_hist	19:47:16	7
2376876	99	49	46,2	cyclictest	2659235	-21	kworker/u16:0+flush-8:0	21:42:30	6
2376876	99	47	45,2	cyclictest	2924760	-21	kworker/u16:0+events_unbound	00:22:29	6
2376876	99	47	44,2	cyclictest	2743393	-21	kworker/u16:5+events_unbound	22:52:31	6
2376432	2	47	37,7	sleep4	0	-21	swapper/4	19:04:53	4
3119528	2	45	0,0	sleep7	3119527	-21	rm	00:35:35	7
2376876	99	45	41,3	cyclictest	2743393	-21	kworker/u16:5+flush-8:0	22:22:41	6
2583375	2	44	0,0	sleep6	0	-21	swapper/6	20:52:15	6
2376876	99	43	40,2	cyclictest	2770190	-21	kworker/u16:3+events_unbound	22:12:29	6
2376877	99	42	37,4	cyclictest	3059986	-21	latency_hist	00:12:15	7
2376876	99	41	39,2	cyclictest	2805479	-21	kworker/u16:1+flush-8:0	22:42:45	6
2376876	99	41	39,2	cyclictest	2805479	-21	kworker/u16:1+events_unbound	23:07:42	6
2376876	99	41	39,2	cyclictest	2659235	-21	kworker/u16:0+events_unbound	21:27:46	6
2376319	2	40	30,7	sleep5	0	-21	swapper/5	19:03:18	5
2376876	99	39	37,2	cyclictest	3023740	-21	kworker/u16:1+events_unbound	00:12:29	6
2376876	99	39	37,2	cyclictest	2997286	-21	kworker/u16:3+events_unbound	00:07:18	6
2376446	2	39	5,30	sleep7	0	-21	swapper/7	19:05:04	7
2376876	99	38	36,2	cyclictest	3023740	-21	kworker/u16:1+events_unbound	00:04:01	6
2376876	99	37	35,2	cyclictest	2924760	-21	kworker/u16:0+events_unbound	23:47:14	6
2376876	99	37	35,2	cyclictest	2732272	-21	kworker/u16:3+events_unbound	21:58:15	6
2376876	99	36	34,2	cyclictest	2924760	-21	kworker/u16:0+flush-8:0	23:47:58	6
2376876	99	36	34,2	cyclictest	2924760	-21	kworker/u16:0+events_unbound	23:34:34	6
2376876	99	36	34,2	cyclictest	2924760	-21	kworker/u16:0+events_unbound	23:18:46	6
2376876	99	36	34,2	cyclictest	2743393	-21	kworker/u16:5+flush-8:0	22:48:53	6
2376876	99	36	34,2	cyclictest	2743393	-21	kworker/u16:5+events_unbound	22:28:54	6
2376876	99	36	34,2	cyclictest	2743393	-21	kworker/u16:5+events_unbound	22:02:49	6
2376876	99	36	34,2	cyclictest	2535218	-21	kworker/u16:3+events_unbound	21:23:42	6
2376876	99	35	33,2	cyclictest	2830371	-21	kworker/u16:2+events_unbound	23:04:01	6
2376876	99	35	33,2	cyclictest	2805479	-21	kworker/u16:1+events_unbound	23:39:27	6
2376876	99	35	33,2	cyclictest	2805479	-21	kworker/u16:1+events_unbound	23:39:27	6
2376876	99	35	33,2	cyclictest	2659235	-21	kworker/u16:0+events_unbound	21:52:12	6
2376876	99	35	33,2	cyclictest	2624824	-21	kworker/u16:4+events_unbound	22:07:38	6
2376877	99	34	28,5	cyclictest	2636539	-21	latency_hist	21:17:16	7
2376876	99	34	32,2	cyclictest	2758055	-21	kworker/u16:0+flush-8:0	22:37:41	6
2376876	99	34	32,2	cyclictest	2535218	-21	kworker/u16:3+events_unbound	21:10:54	6
2376873	99	34	32,2	cyclictest	2515501	-21	kworker/u16:1+flush-8:0	21:12:47	5
2376876	99	33	31,2	cyclictest	2976765	-21	kworker/u16:2+flush-8:0	00:17:50	6
2376876	99	33	31,2	cyclictest	2976765	-21	kworker/u16:2+events_unbound	23:58:50	6
2376876	99	33	31,2	cyclictest	2924760	-21	kworker/u16:0+events_unbound	00:30:35	6
2376876	99	33	31,2	cyclictest	2758055	-21	kworker/u16:0+events_unbound	22:32:45	6
2376876	99	33	31,2	cyclictest	2743393	-21	kworker/u16:5+events_unbound	22:19:53	6
2376876	99	33	31,2	cyclictest	2659235	-21	kworker/u16:0+events_unbound	21:38:54	6
2376876	99	33	31,2	cyclictest	2659235	-21	kworker/u16:0+events_unbound	21:38:54	6
2376876	99	33	31,2	cyclictest	2624824	-21	kworker/u16:4+events_unbound	21:20:50	6
2376876	99	33	31,2	cyclictest	2624824	-21	kworker/u16:4+events_unbound	21:13:22	6
2376876	99	33	31,2	cyclictest	2515501	-21	kworker/u16:1+events_unbound	21:32:43	6
2376877	99	32	28,3	cyclictest	124	-21	kswapd0	23:32:29	7
2376876	99	32	30,2	cyclictest	2924760	-21	kworker/u16:0+events_unbound	23:13:35	6
2828888	2	31	0,1	chrt	2828889	-21	sh	22:34:34	7
2376876	99	31	29,2	cyclictest	2924760	-21	kworker/u16:0+events_unbound	00:32:48	6
2376876	99	30	28,2	cyclictest	2924760	-21	kworker/u16:0+events_unbound	23:53:22	6
2376876	99	30	28,2	cyclictest	2924760	-21	kworker/u16:0+events_unbound	23:23:51	6
2376876	99	30	28,2	cyclictest	2659235	-21	kworker/u16:0+events_unbound	21:54:58	6
3004728	2	29	0,1	chrt	3004729	-21	kthreadcore	23:47:35	7
2376876	99	29	27,2	cyclictest	2357487	-21	kworker/u16:1+flush-8:0	19:42:44	6
2376877	99	28	24,3	cyclictest	124	-21	kswapd0	22:22:28	7
2376876	99	27	24,2	cyclictest	2466765	-21	kworker/u16:4+flush-8:0	20:22:26	6
2376873	99	27	24,2	cyclictest	2535218	-21	kworker/u16:3+events_unbound	20:42:28	5
2376877	99	26	24,1	cyclictest	2951669	-21	/usr/sbin/munin	23:27:30	7
2376877	99	26	21,4	cyclictest	650	-21	systemd-journal	19:57:11	7
2376876	99	26	24,2	cyclictest	2583525	-21	kworker/u16:0+events_unbound	20:53:26	6
2376876	99	25	22,2	cyclictest	2515501	-21	kworker/u16:1+events_unbound	20:57:25	6
2376876	99	25	22,2	cyclictest	2515501	-21	kworker/u16:1+events_unbound	20:27:17	6
3090623	2	24	0,1	chrt	0	-21	swapper/5	00:22:35	5
2376877	99	24	19,4	cyclictest	2757634	-21	latency_hist	22:07:16	7
2376877	99	23	22,0	cyclictest	0	-21	swapper/7	23:52:21	7
2376877	99	23	21,2	cyclictest	124	-21	kswapd0	00:12:28	7
2376877	99	23	17,5	cyclictest	650	-21	systemd-journal	20:47:15	7
2376876	99	23	21,2	cyclictest	2477284	-21	kworker/u16:0+events_unbound	20:03:26	6
2376876	99	23	21,2	cyclictest	2357487	-21	kworker/u16:1+flush-8:0	19:32:26	6
2376876	99	23	19,3	cyclictest	2458065	-21	kworker/u16:2+flush-8:0	19:57:16	6
2376877	99	22	21,0	cyclictest	0	-21	swapper/7	21:07:38	7
2376877	99	22	19,2	cyclictest	2983546	-21	grep	23:37:38	7
2376877	99	22	19,2	cyclictest	2983546	-21	grep	23:37:38	7
2376876	99	22	20,2	cyclictest	2313557	-21	kworker/u16:0+events_unbound	19:07:35	6
2376876	99	21	19,2	cyclictest	2458065	-21	kworker/u16:2+flush-8:0	20:08:16	6
2376873	99	21	18,2	cyclictest	2583525	-21	kworker/u16:0+events_unbound	20:52:31	5
2376877	99	20	18,1	cyclictest	2780311	-21	ssh	22:14:17	7
2376876	99	20	18,2	cyclictest	2400279	-21	kworker/u16:3+events_unbound	19:38:27	6
2376876	99	20	17,2	cyclictest	2357487	-21	kworker/u16:1+events_unbound	19:47:17	6
2376876	99	20	16,3	cyclictest	2535218	-21	kworker/u16:3+flush-8:0	21:02:34	6
2376873	99	20	17,2	cyclictest	2535218	-21	kworker/u16:3+flush-8:0	20:57:38	5
2376877	99	19	17,1	cyclictest	0	-21	swapper/7	19:12:38	7
2376877	99	19	0,17	cyclictest	2612335	-21	latency_hist	21:07:16	7
2376876	99	19	17,2	cyclictest	2515501	-21	kworker/u16:1+events_unbound	20:40:26	6
2376876	99	19	17,2	cyclictest	2357487	-21	kworker/u16:1+events_unbound	19:18:06	6
2376877	99	18	17,0	cyclictest	0	-21	swapper/7	20:37:42	7
2376877	99	18	17,0	cyclictest	0	-21	swapper/7	19:07:33	7
2376877	99	18	16,1	cyclictest	3035357	-21	ssh	00:01:30	7
2376877	99	18	15,2	cyclictest	2648100	-21	ssh	21:21:19	7
2376877	99	18	15,2	cyclictest	1267	-21	snmpd	21:36:43	7
2376877	99	18	12,5	cyclictest	2818220	-21	ssh	22:32:15	7
2376876	99	18	16,2	cyclictest	2515501	-21	kworker/u16:1+events_unbound	20:13:11	6
2376876	99	18	16,2	cyclictest	2400279	-21	kworker/u16:3+flush-8:0	19:22:26	6
2376869	99	18	13,4	cyclictest	2399129	-21	smart_sda	19:12:42	4
2376877	99	17	15,1	cyclictest	2743107	-21	ssh	21:57:50	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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