OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #3, slot #4

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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance

Characteristics of the 100 highest latencies:

System rack3slot4.osadl.org (updated Wed May 06, 2026 12:46:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
910356	2	1485	1466,9	sleep2	886772	-21	kworker/2:0+events@ dbs_work_handler	07:07:34	2
1078674	2	133	0,6	sleep1	22	-21	rcuc/1	10:47:25	1
910703	99	132	31,59	cyclictest	1150712	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	11:57:05	0
910717	99	128	114,6	cyclictest	1061624	-21	kworker/u12:3+events_unbound@ flush_memcg_stats_dwork	10:48:52	3
910717	99	125	111,7	cyclictest	1171502	-21	kworker/u12:3+events_unbound@ flush_memcg_stats_dwork	12:29:15	3
1094623	2	117	0,6	sleep0	1094615	-21	ssh	11:00:26	0
910717	99	116	101,7	cyclictest	1160247	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	12:09:10	3
910717	99	115	101,7	cyclictest	1171502	-21	kworker/u12:3+events_unbound@ flush_memcg_stats_dwork	12:39:17	3
910703	99	114	74,26	cyclictest	1150712	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	11:47:35	0
910703	99	114	27,66	cyclictest	15	-21	rcuc/0	11:30:17	0
910717	99	113	88,9	cyclictest	950848	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	10:29:35	3
910703	99	113	22,60	cyclictest	939389	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	08:45:02	0
910717	99	111	96,7	cyclictest	1031038	-21	kworker/u12:3+events_unbound@ flush_memcg_stats_dwork	10:18:49	3
910703	99	111	1,77	cyclictest	0	-21	swapper/0	09:45:50	0
910703	99	109	2,73	cyclictest	910433	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	07:32:09	0
910703	99	106	37,44	cyclictest	1184721	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	12:18:33	0
910703	99	104	62,22	cyclictest	0	-21	swapper/0	08:39:32	0
910703	99	104	62,22	cyclictest	0	-21	swapper/0	08:39:32	0
910703	99	104	61,35	cyclictest	931132	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	08:18:24	0
910703	99	104	3,82	cyclictest	0	-21	swapper/0	08:30:39	0
910703	99	104	2,4	cyclictest	0	-21	swapper/0	10:11:23	0
910703	99	104	2,4	cyclictest	0	-21	swapper/0	10:11:22	0
910703	99	104	22,59	cyclictest	918458	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	08:11:14	0
910703	99	103	2,82	cyclictest	0	-21	swapper/0	07:20:15	0
910703	99	103	2,80	cyclictest	0	-21	swapper/0	08:25:00	0
910703	99	103	2,80	cyclictest	0	-21	swapper/0	08:25:00	0
910717	99	102	89,7	cyclictest	939389	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	08:33:26	3
910703	99	101	73,20	cyclictest	950848	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	10:33:22	0
910703	99	101	6,16	cyclictest	1126371	-21	ssh	11:25:42	0
910703	99	101	2,59	cyclictest	1212741	-21	ssh	12:35:54	0
910703	99	100	0,81	cyclictest	0	-21	swapper/0	09:06:09	0
910703	99	100	0,81	cyclictest	0	-21	swapper/0	09:06:08	0
910717	99	99	76,8	cyclictest	1150712	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	11:54:07	3
910703	99	99	56,23	cyclictest	0	-21	swapper/0	07:10:47	0
910703	99	99	2,81	cyclictest	0	-21	swapper/0	08:04:10	0
910703	99	98	59,27	cyclictest	0	-21	swapper/0	10:20:01	0
910703	99	98	1,4	cyclictest	0	-21	swapper/0	10:25:27	0
910703	99	98	1,15	cyclictest	1064377	-21	ntpq	10:35:31	0
910717	99	97	83,6	cyclictest	1037228	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	10:42:33	3
910703	99	97	2,69	cyclictest	1011277	-21	ssh	09:52:57	0
910703	99	96	2,80	cyclictest	959138	-21	diskmemload	09:22:58	0
910703	99	96	24,42	cyclictest	976854	-21	if_err_eth0	09:25:22	0
1210746	2	96	0,6	sleep1	1210285	-21	apt-get	12:35:07	1
910717	99	95	83,6	cyclictest	902309	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	07:17:34	3
910703	99	95	4,15	cyclictest	1050444	-21	munin-run	10:25:00	0
910717	99	94	81,6	cyclictest	950848	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	09:53:42	3
910717	99	94	81,6	cyclictest	918458	-21	kworker/u12:2+events_unbound@ flush_memcg_stats_dwork	07:33:18	3
910703	99	94	66,12	cyclictest	0	-21	swapper/0	07:58:42	0
910703	99	94	66,12	cyclictest	0	-21	swapper/0	07:58:42	0
910703	99	94	2,80	cyclictest	0	-21	swapper/0	08:44:12	0
910703	99	94	2,73	cyclictest	1076923	-21	ls	10:45:43	0
910703	99	94	2,16	cyclictest	917528	-21	irqstats	07:25:24	0
910703	99	93	6,12	cyclictest	142	50	irq/98-imx_mu_c	12:05:36	0
910703	99	93	2,79	cyclictest	0	-21	swapper/0	07:16:03	0
910703	99	93	2,73	cyclictest	969637	-21	grep	09:20:01	0
910703	99	93	2,67	cyclictest	0	-21	swapper/0	10:05:33	0
910703	99	93	2,67	cyclictest	0	-21	swapper/0	10:05:32	0
910703	99	93	2,14	cyclictest	1107183	-21	ntpq	11:10:33	0
910703	99	93	2,14	cyclictest	1107183	-21	ntpq	11:10:32	0
910703	99	93	1,80	cyclictest	959138	-21	diskmemload	11:15:39	0
910703	99	93	1,80	cyclictest	959138	-21	diskmemload	11:15:38	0
910703	99	92	31,36	cyclictest	691	50	irq/529-eth0-Tx	11:35:31	0
910703	99	92	2,78	cyclictest	0	-21	swapper/0	09:04:14	0
910703	99	92	2,70	cyclictest	0	-21	swapper/0	09:30:26	0
910703	99	92	2,70	cyclictest	0	-21	swapper/0	09:30:26	0
910703	99	92	2,15	cyclictest	1205737	-21	ntpq	12:30:29	0
910703	99	91	2,80	cyclictest	0	-21	swapper/0	10:55:40	0
910717	99	90	77,7	cyclictest	971040	-21	kworker/u12:3+events_unbound@ flush_memcg_stats_dwork	09:43:42	3
910717	99	90	77,7	cyclictest	1037228	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	10:37:14	3
910703	99	90	59,16	cyclictest	0	-21	swapper/0	08:57:17	0
910703	99	90	49,28	cyclictest	0	-21	swapper/0	07:48:09	0
910703	99	90	3,73	cyclictest	0	-21	swapper/0	08:50:02	0
910703	99	90	3,15	cyclictest	996292	-21	ntpq	09:40:37	0
910703	99	90	1,71	cyclictest	0	-21	swapper/0	11:50:11	0
910703	99	90	14,33	cyclictest	1121650	-21	ssh	11:22:21	0
910703	99	90	0,5	cyclictest	0	-21	swapper/0	08:05:36	0
910717	99	89	77,6	cyclictest	1061624	-21	kworker/u12:3+events_unbound@ flush_memcg_stats_dwork	11:22:35	3
910717	99	89	76,6	cyclictest	1079989	-21	kworker/u12:4+events_unbound@ flush_memcg_stats_dwork	11:03:06	3
910703	99	89	51,26	cyclictest	0	-21	swapper/0	08:28:38	0
910703	99	89	51,25	cyclictest	0	-21	swapper/0	09:55:24	0
910703	99	89	36,35	cyclictest	689	50	irq/527-eth0-Tx	12:00:43	0
910703	99	89	23,51	cyclictest	0	-21	swapper/0	09:12:13	0
910717	99	88	76,6	cyclictest	1184721	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	12:19:04	3
910717	99	88	76,6	cyclictest	1160247	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	12:33:37	3
910717	99	88	75,7	cyclictest	1079989	-21	kworker/u12:4+events_unbound@ flush_memcg_stats_dwork	11:39:34	3
910703	99	88	29,43	cyclictest	993362	-21	taskset	09:38:34	0
910703	99	88	2,72	cyclictest	0	-21	swapper/0	10:50:11	0
910717	99	87	74,7	cyclictest	950848	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	08:55:40	3
910717	99	87	70,10	cyclictest	1103818	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	11:15:08	3
910717	99	87	70,10	cyclictest	1103818	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	11:15:08	3
910717	99	87	61,9	cyclictest	1097160	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	11:06:08	3
910707	99	87	74,7	cyclictest	950848	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	09:33:39	1
910707	99	87	74,7	cyclictest	950848	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	09:33:39	1
910703	99	87	3,69	cyclictest	0	-21	swapper/0	10:40:19	0
910703	99	87	2,71	cyclictest	0	-21	swapper/0	12:28:13	0
910717	99	85	72,7	cyclictest	931132	-21	kworker/u12:1+events_unbound@ flush_memcg_stats_dwork	08:06:44	3
910717	99	85	70,9	cyclictest	910433	-21	kworker/u12:0+events_unbound@ flush_memcg_stats_dwork	07:20:25	3
910703	99	85	2,13	cyclictest	927166	-21	apt-get	07:50:13	0
1098085	2	85	0,4	sleep4	0	-21	swapper/4	11:03:38	4
910717	99	84	72,6	cyclictest	1079989	-21	kworker/u12:4+events_unbound@ flush_memcg_stats_dwork	10:53:46	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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