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 Sat Jan 31, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1846266	2	57	47,7	sleep6	0	-21	swapper/6	19:04:55	6
1846227	2	55	44,7	sleep5	0	-21	swapper/5	19:04:22	5
1846677	99	51	49,2	cyclictest	2237686	-21	kworker/u16:3+events_unbound	22:47:09	5
1846258	2	51	17,30	sleep7	0	-21	swapper/7	19:04:48	7
1846673	99	47	44,3	cyclictest	2237686	-21	kworker/u16:3+flush-8:0	22:26:39	4
1846683	99	42	37,4	cyclictest	2177127	-21	latency_hist	21:46:40	7
1846323	2	42	14,7	sleep4	0	-21	swapper/4	19:05:42	4
1846677	99	41	39,2	cyclictest	2321639	-21	kworker/u16:4+flush-8:0	00:27:07	5
1846673	99	40	38,2	cyclictest	2321639	-21	kworker/u16:4+events_unbound	23:31:42	4
1846677	99	39	37,2	cyclictest	2071472	-21	kworker/u16:2+events_unbound	21:34:50	5
1846677	99	39	36,2	cyclictest	2381775	-21	kworker/u16:2+events_unbound	23:46:49	5
1846673	99	39	36,2	cyclictest	1927555	-21	kworker/u16:4+events_unbound	21:51:41	4
1846683	99	38	36,1	cyclictest	0	-21	swapper/7	00:06:41	7
1846683	99	38	0,36	cyclictest	2583983	-21	ssh	00:32:49	7
1846677	99	38	36,2	cyclictest	2237686	-21	kworker/u16:3+events_unbound	23:08:09	5
1846677	99	38	36,2	cyclictest	2164406	-21	kworker/u16:0+flush-8:0	22:36:39	5
1846677	99	38	36,2	cyclictest	2071472	-21	kworker/u16:2+events_unbound	21:24:37	5
1846673	99	38	36,2	cyclictest	2573140	-21	kworker/u16:2+events_unbound	00:34:38	4
1846673	99	38	35,2	cyclictest	2381775	-21	kworker/u16:2+flush-8:0	23:51:39	4
1846683	99	37	34,2	cyclictest	2537943	-21	/usr/sbin/munin	00:16:39	7
1846683	99	37	31,5	cyclictest	2225189	-21	latency_hist	22:06:40	7
1846677	99	37	35,2	cyclictest	2321639	-21	kworker/u16:4+events_unbound	23:36:49	5
1846677	99	37	35,2	cyclictest	2237686	-21	kworker/u16:3+events_unbound	23:04:13	5
1846677	99	37	35,2	cyclictest	2189250	-21	kworker/u16:3+events_unbound	21:55:37	5
1846677	99	37	35,2	cyclictest	2164406	-21	kworker/u16:0+events_unbound	22:43:10	5
1846673	99	37	35,2	cyclictest	2103907	-21	kworker/u16:0+events_unbound	21:25:06	4
2390828	2	36	0,1	chrt	0	-21	swapper/5	23:12:07	5
1846683	99	36	35,0	cyclictest	0	-21	swapper/7	22:11:50	7
1846677	99	36	34,2	cyclictest	2490245	-21	kworker/u16:1+events_unbound	00:12:25	5
1846677	99	36	34,2	cyclictest	2381775	-21	kworker/u16:2+events_unbound	23:29:57	5
1846677	99	36	34,2	cyclictest	2381775	-21	kworker/u16:2+events_unbound	23:21:21	5
1846677	99	36	34,2	cyclictest	2321639	-21	kworker/u16:4+events_unbound	23:44:34	5
1846677	99	36	34,2	cyclictest	2321639	-21	kworker/u16:4+events_unbound	22:57:40	5
1846677	99	36	34,2	cyclictest	2321639	-21	kworker/u16:4+events_unbound	22:55:31	5
1846677	99	36	34,2	cyclictest	2321639	-21	kworker/u16:4+events_unbound	00:01:13	5
1846677	99	36	34,2	cyclictest	2273959	-21	kworker/u16:2+events_unbound	22:28:08	5
1846677	99	36	34,2	cyclictest	2237686	-21	kworker/u16:3+events_unbound	23:55:33	5
1846677	99	36	34,2	cyclictest	2237686	-21	kworker/u16:3+events_unbound	22:21:29	5
1846677	99	36	34,2	cyclictest	2237686	-21	kworker/u16:3+events_unbound	22:21:29	5
1846677	99	36	34,2	cyclictest	2164406	-21	kworker/u16:0+events_unbound	22:05:45	5
1846677	99	36	34,2	cyclictest	2117193	-21	kworker/u16:1+events_unbound	21:39:38	5
1846677	99	36	34,2	cyclictest	2117193	-21	kworker/u16:1+events_unbound	21:39:38	5
1846677	99	36	34,2	cyclictest	2071472	-21	kworker/u16:2+events_unbound	21:08:06	5
1846677	99	36	34,2	cyclictest	1927555	-21	kworker/u16:4+flush-8:0	21:42:18	5
1846677	99	36	34,2	cyclictest	1927555	-21	kworker/u16:4+events_unbound	21:30:58	5
1846673	99	36	34,2	cyclictest	2237686	-21	kworker/u16:3+events_unbound	23:17:50	4
1846683	99	35	32,2	cyclictest	1878231	-21	ntp_states	19:17:06	7
1846683	99	35	31,3	cyclictest	2429234	-21	sh	23:30:34	7
1846683	99	35	29,5	cyclictest	2032959	-21	latency_hist	20:41:40	7
1846677	99	35	33,2	cyclictest	2514255	-21	kworker/u16:3+events_unbound	00:25:09	5
1846677	99	35	33,2	cyclictest	2321639	-21	kworker/u16:4+events_unbound	00:18:13	5
1846677	99	35	33,2	cyclictest	2103907	-21	kworker/u16:0+events_unbound	21:19:38	5
1846677	99	35	32,2	cyclictest	1818098	-21	kworker/u16:2+flush-8:0	19:36:50	5
1846673	99	35	33,2	cyclictest	2321639	-21	kworker/u16:4+flush-8:0	23:42:37	4
1846673	99	35	33,2	cyclictest	2321639	-21	kworker/u16:4+events_unbound	23:24:21	4
1846673	99	35	33,2	cyclictest	2273959	-21	kworker/u16:2+events_unbound	22:36:38	4
1846677	99	34	32,2	cyclictest	2573140	-21	kworker/u16:2+events_unbound	00:33:28	5
1846677	99	34	32,2	cyclictest	2465747	-21	kworker/u16:0+events_unbound	00:11:01	5
1846677	99	34	32,2	cyclictest	2273836	-21	kworker/u16:1+events_unbound	22:37:54	5
1846677	99	34	32,2	cyclictest	2164406	-21	kworker/u16:0+events_unbound	22:15:41	5
1846677	99	34	32,2	cyclictest	2164406	-21	kworker/u16:0+events_unbound	21:49:06	5
1846677	99	34	31,2	cyclictest	2061433	-21	kworker/u16:1+flush-8:0	21:11:45	5
1846683	99	33	0,32	cyclictest	2441536	-21	ssh	23:36:14	7
1846673	99	33	31,2	cyclictest	2514255	-21	kworker/u16:3+events_unbound	00:26:41	4
1846673	99	33	31,2	cyclictest	2465747	-21	kworker/u16:0+events_unbound	23:59:25	4
1846673	99	33	31,2	cyclictest	2381775	-21	kworker/u16:2+events_unbound	23:38:21	4
1846673	99	33	31,2	cyclictest	2321639	-21	kworker/u16:4+events_unbound	00:12:49	4
1846673	99	33	31,2	cyclictest	2321639	-21	kworker/u16:4+events_unbound	00:03:10	4
1846673	99	33	31,2	cyclictest	2273836	-21	kworker/u16:1+flush-8:0	22:47:21	4
1846673	99	33	31,2	cyclictest	2273836	-21	kworker/u16:1+events_unbound	23:02:29	4
1846673	99	33	31,2	cyclictest	2237686	-21	kworker/u16:3+events_unbound	22:56:22	4
1846673	99	33	31,2	cyclictest	2237686	-21	kworker/u16:3+events_unbound	22:38:58	4
1846673	99	33	31,2	cyclictest	2237686	-21	kworker/u16:3+events_unbound	22:13:50	4
1846673	99	33	31,2	cyclictest	2164406	-21	kworker/u16:0+events_unbound	22:10:50	4
1846673	99	33	31,2	cyclictest	1927555	-21	kworker/u16:4+flush-8:0	21:58:10	4
1846673	99	33	30,2	cyclictest	1927555	-21	kworker/u16:4+events_unbound	22:01:41	4
1846683	99	32	0,30	cyclictest	2330767	-21	wc	22:47:07	7
1846678	99	32	30,2	cyclictest	2573371	-21	kworker/u16:5+flush-8:0	00:32:04	6
1846678	99	32	30,2	cyclictest	2237686	-21	kworker/u16:3+flush-8:0	23:10:38	6
1846678	99	32	30,2	cyclictest	2071472	-21	kworker/u16:2+events_unbound	21:31:54	6
1846677	99	32	30,2	cyclictest	2321639	-21	kworker/u16:4+events_unbound	23:36:24	5
1846677	99	32	30,2	cyclictest	2237686	-21	kworker/u16:3+events_unbound	23:23:44	5
1846677	99	32	30,2	cyclictest	2225609	-21	kworker/u16:2+events_unbound	22:10:58	5
1846677	99	32	30,2	cyclictest	2117193	-21	kworker/u16:1+events_unbound	22:00:09	5
1846673	99	32	30,2	cyclictest	2465747	-21	kworker/u16:0+events_unbound	00:08:46	4
1846673	99	32	30,2	cyclictest	2321639	-21	kworker/u16:4+events_unbound	23:54:09	4
1846673	99	32	30,2	cyclictest	2321639	-21	kworker/u16:4+events_unbound	00:26:20	4
1846673	99	32	30,2	cyclictest	2273836	-21	kworker/u16:1+events_unbound	22:31:05	4
1846673	99	32	30,2	cyclictest	2164406	-21	kworker/u16:0+events_unbound	21:44:50	4
1846677	99	31	29,2	cyclictest	2465747	-21	kworker/u16:0+events_unbound	00:03:14	5
1846677	99	31	29,2	cyclictest	1129932	-21	kworker/u16:3+events_unbound	19:22:50	5
1846673	99	31	29,2	cyclictest	2321639	-21	kworker/u16:4+flush-8:0	23:11:34	4
1846673	99	31	29,2	cyclictest	2321639	-21	kworker/u16:4+events_unbound	22:59:22	4
1846673	99	31	29,2	cyclictest	2321639	-21	kworker/u16:4+events_unbound	00:18:46	4
1846673	99	31	29,2	cyclictest	2237686	-21	kworker/u16:3+flush-8:0	23:12:16	4
1846673	99	31	29,2	cyclictest	2164406	-21	kworker/u16:0+events_unbound	21:49:18	4
1846673	99	31	29,2	cyclictest	2103907	-21	kworker/u16:0+events_unbound	21:20:50	4
1846673	99	31	29,2	cyclictest	2071472	-21	kworker/u16:2+events_unbound	21:33:58	4
1846673	99	31	29,2	cyclictest	1927555	-21	kworker/u16:4+events_unbound	21:13:42	4
1846683	99	30	0,28	cyclictest	2307664	-21	taskset	22:38:08	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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