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 Mon Aug 03, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1095411	2	55	44,8	sleep4	0	-21	swapper/4	07:05:16	4
1095386	2	50	16,29	sleep7	0	-21	swapper/7	07:04:55	7
1095922	99	39	0,37	cyclictest	1216902	-21	sed	08:08:40	7
1095922	99	38	0,36	cyclictest	1275370	-21	cat	08:38:40	7
1095922	99	37	33,3	cyclictest	125	-21	kswapd0	10:23:39	7
1095922	99	37	33,3	cyclictest	125	-21	kswapd0	10:23:39	7
1095911	99	37	33,3	cyclictest	1456613	-21	kworker/u16:4+events_unbound	10:13:55	4
1095630	2	37	27,7	sleep5	0	-21	swapper/5	07:08:22	5
1095922	99	36	34,1	cyclictest	1551306	-21	ssh	10:34:05	7
1095922	99	34	28,5	cyclictest	1304454	-21	latency_hist	08:53:40	7
1095913	99	34	32,2	cyclictest	1542304	-21	kworker/u16:2+events_unbound	10:38:54	5
1086232	2	34	22,8	sleep6	0	-21	swapper/6	07:03:42	6
1095922	99	33	32,0	cyclictest	0	-21	swapper/7	09:39:02	7
1095922	99	33	30,2	cyclictest	958	-21	NetworkManager	10:23:57	7
1095922	99	33	30,2	cyclictest	958	-21	NetworkManager	10:23:57	7
1095922	99	33	0,31	cyclictest	1333773	-21	sed	09:08:40	7
1095922	99	33	0,31	cyclictest	1333773	-21	sed	09:08:40	7
1095911	99	33	30,2	cyclictest	1590391	-21	kworker/u16:2+events_unbound	11:33:54	4
1095922	99	31	0,29	cyclictest	1346022	-21	systemd-run	09:13:40	7
1095913	99	31	29,2	cyclictest	1505161	-21	kworker/u16:0+events_unbound	10:49:13	5
1095913	99	29	27,2	cyclictest	1590391	-21	kworker/u16:2+events_unbound	11:02:05	5
1095913	99	29	27,2	cyclictest	1505161	-21	kworker/u16:0+events_unbound	10:23:29	5
1095913	99	29	27,2	cyclictest	1505161	-21	kworker/u16:0+events_unbound	10:23:29	5
1095913	99	29	27,2	cyclictest	1050623	-21	kworker/u16:4+events_unbound	07:21:38	5
1095913	99	29	26,2	cyclictest	1274584	-21	kworker/u16:3+flush-8:0	08:58:45	5
1095911	99	29	27,2	cyclictest	1542304	-21	kworker/u16:2+events_unbound	10:38:56	4
1095913	99	28	26,2	cyclictest	1505161	-21	kworker/u16:0+events_unbound	11:04:08	5
1095913	99	28	26,2	cyclictest	1419639	-21	kworker/u16:3+events_unbound	11:23:25	5
1095913	99	28	26,2	cyclictest	1324133	-21	kworker/u16:1+events_unbound	09:32:29	5
1095913	99	28	26,2	cyclictest	1294376	-21	kworker/u16:0+events_unbound	08:45:42	5
1095913	99	28	26,2	cyclictest	1206784	-21	kworker/u16:1+events_unbound	08:17:38	5
1095913	99	28	26,2	cyclictest	1168111	-21	kworker/u16:0+events_unbound	07:59:12	5
1095911	99	28	26,2	cyclictest	1454222	-21	kworker/u16:1+events_unbound	10:33:31	4
1479321	2	27	0,0	chrt	1479322	-21	sh	10:05:39	7
1095922	99	27	26,0	cyclictest	0	-21	swapper/7	10:14:06	7
1095922	99	27	24,2	cyclictest	1657871	-21	kthreadcore	11:18:58	7
1095922	99	27	23,2	cyclictest	1158402	-21	cat	07:38:40	7
1095922	99	27	23,2	cyclictest	1158402	-21	cat	07:38:40	7
1095913	99	27	25,2	cyclictest	1590391	-21	kworker/u16:2+events_unbound	11:34:47	5
1095913	99	27	25,2	cyclictest	1419639	-21	kworker/u16:3+events_unbound	11:26:31	5
1095913	99	27	25,2	cyclictest	1419639	-21	kworker/u16:3+events_unbound	09:56:29	5
1095913	99	27	25,2	cyclictest	1332724	-21	kworker/u16:4+events_unbound	09:24:26	5
1095913	99	27	25,2	cyclictest	1274584	-21	kworker/u16:3+events_unbound	08:58:38	5
1095913	99	27	24,2	cyclictest	1294376	-21	kworker/u16:0+flush-8:0	08:48:45	5
1095922	99	26	0,24	cyclictest	6010	-21	gnome-software	07:17:32	7
1095913	99	26	24,2	cyclictest	431988	-21	kworker/u16:2+events_unbound	07:36:39	5
1095913	99	26	24,2	cyclictest	431988	-21	kworker/u16:2+events_unbound	07:36:39	5
1095913	99	26	24,2	cyclictest	1652641	-21	kworker/u16:1+events_unbound	11:31:57	5
1095913	99	26	24,2	cyclictest	1629417	-21	kworker/u16:4+events_unbound	11:14:49	5
1095913	99	26	24,2	cyclictest	1505161	-21	kworker/u16:0+events_unbound	10:57:16	5
1095913	99	26	24,2	cyclictest	1456613	-21	kworker/u16:4+events_unbound	10:10:37	5
1095913	99	26	24,2	cyclictest	1454222	-21	kworker/u16:1+events_unbound	10:02:17	5
1095913	99	26	24,2	cyclictest	1118287	-21	kworker/u16:5+events_unbound	09:07:47	5
1095913	99	26	24,2	cyclictest	1118287	-21	kworker/u16:5+events_unbound	09:07:47	5
1095913	99	26	24,2	cyclictest	1050623	-21	kworker/u16:4+flush-8:0	07:09:38	5
1095913	99	26	24,2	cyclictest	1050623	-21	kworker/u16:4+events_unbound	07:29:39	5
1095919	99	25	23,2	cyclictest	1332724	-21	kworker/u16:4+events_unbound	09:09:39	6
1095919	99	25	23,2	cyclictest	1050623	-21	kworker/u16:4+events_unbound	07:19:41	6
1095919	99	25	22,2	cyclictest	1303291	-21	kworker/u16:2+flush-8:0	08:59:02	6
1095919	99	25	19,6	cyclictest	1456613	-21	kworker/u16:4+events_unbound	10:03:35	6
1095913	99	25	23,2	cyclictest	431988	-21	kworker/u16:2+events_unbound	07:25:54	5
1095913	99	25	23,2	cyclictest	1714048	-21	kworker/u16:1+events_unbound	11:59:27	5
1095913	99	25	23,2	cyclictest	1419639	-21	kworker/u16:3+events_unbound	12:27:10	5
1095913	99	25	23,2	cyclictest	1332724	-21	kworker/u16:4+flush-8:0	09:12:26	5
1095913	99	25	23,2	cyclictest	1332724	-21	kworker/u16:4+events_unbound	09:18:15	5
1095913	99	25	23,2	cyclictest	1236350	-21	kworker/u16:2+events_unbound	08:31:38	5
1095913	99	25	23,2	cyclictest	1168111	-21	kworker/u16:0+events_unbound	07:54:54	5
1095913	99	25	23,2	cyclictest	1118287	-21	kworker/u16:5+events_unbound	08:26:10	5
1095913	99	25	23,2	cyclictest	1118287	-21	kworker/u16:5+events_unbound	07:47:38	5
1095913	99	25	22,2	cyclictest	1419639	-21	kworker/u16:3+flush-8:0	12:08:43	5
1095913	99	24	22,2	cyclictest	1846512	-21	kworker/u16:2+flush-8:0	12:38:20	5
1095913	99	24	22,2	cyclictest	1760565	-21	kworker/u16:6+events_unbound	12:18:04	5
1095913	99	24	22,2	cyclictest	1629417	-21	kworker/u16:4+events_unbound	11:11:55	5
1095913	99	24	22,2	cyclictest	1456613	-21	kworker/u16:4+events_unbound	10:17:28	5
1095913	99	24	22,2	cyclictest	1454222	-21	kworker/u16:1+events_unbound	10:03:53	5
1095913	99	24	22,2	cyclictest	1419639	-21	kworker/u16:3+events_unbound	11:47:04	5
1095913	99	24	22,2	cyclictest	1265707	-21	kworker/u16:1+events_unbound	08:40:02	5
1095913	99	24	22,2	cyclictest	1236350	-21	kworker/u16:2+events_unbound	08:36:43	5
1095913	99	24	22,2	cyclictest	1050623	-21	kworker/u16:4+events_unbound	07:42:06	5
1095913	99	24	21,2	cyclictest	431988	-21	kworker/u16:2+events_unbound	07:13:42	5
1095911	99	24	23,1	cyclictest	1324133	-21	kworker/u16:1+events_unbound	09:28:52	4
1095922	99	23	22,0	cyclictest	0	-21	swapper/7	07:58:54	7
1095922	99	23	0,1	cyclictest	0	-21	swapper/7	07:19:06	7
1095919	99	23	21,2	cyclictest	1714048	-21	kworker/u16:1+events_unbound	12:24:29	6
1095919	99	23	21,2	cyclictest	1419639	-21	kworker/u16:3+events_unbound	12:09:50	6
1095919	99	23	20,2	cyclictest	1419639	-21	kworker/u16:3+events_unbound	11:23:47	6
1095913	99	23	21,2	cyclictest	1505161	-21	kworker/u16:0+events_unbound	10:29:01	5
1095913	99	23	21,2	cyclictest	1419639	-21	kworker/u16:3+events_unbound	12:31:08	5
1095913	99	23	21,2	cyclictest	1370551	-21	kworker/u16:2+events_unbound	09:45:13	5
1095913	99	23	21,2	cyclictest	1178239	-21	kworker/u16:1+events_unbound	07:49:18	5
1095913	99	23	21,2	cyclictest	1118287	-21	kworker/u16:5+events_unbound	08:21:07	5
1095913	99	23	20,2	cyclictest	1699420	-21	kworker/u16:0+events_unbound	11:38:49	5
1095911	99	23	21,2	cyclictest	1236350	-21	kworker/u16:2+flush-8:0	08:24:11	4
1095911	99	23	21,2	cyclictest	1118287	-21	kworker/u16:5+events_unbound	08:33:53	4
1095922	99	22	16,5	cyclictest	1187582	-21	latency_hist	07:53:40	7
1095919	99	22	20,2	cyclictest	1714048	-21	kworker/u16:1+flush-8:0	11:48:55	6
1095919	99	22	20,2	cyclictest	1505161	-21	kworker/u16:0+flush-8:0	11:05:14	6
1095919	99	22	20,2	cyclictest	1454222	-21	kworker/u16:1+events_unbound	10:08:20	6
1095919	99	22	20,2	cyclictest	1206784	-21	kworker/u16:1+events_unbound	08:16:00	6
1095919	99	22	20,2	cyclictest	1178239	-21	kworker/u16:1+events_unbound	07:50:22	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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