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 Dec 25, 2025 12:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3657647	2	63	52,8	sleep5	0	-21	swapper/5	07:07:05	5
3658098	99	51	45,5	cyclictest	650	-21	systemd-journal	09:09:07	7
3657596	2	49	39,7	sleep4	0	-21	swapper/4	07:06:24	4
3658098	99	48	41,6	cyclictest	3690865	-21	latency_hist	07:24:07	7
3658091	99	40	38,2	cyclictest	3836259	-21	kworker/u16:5+events_unbound	09:09:22	4
3657714	2	39	29,7	sleep6	0	-21	swapper/6	07:08:02	6
3648538	2	38	3,29	sleep7	0	-21	swapper/7	07:04:10	7
3658098	99	35	29,5	cyclictest	3991039	-21	latency_hist	09:59:07	7
3658098	99	35	29,5	cyclictest	3991039	-21	latency_hist	09:59:07	7
3658091	99	35	33,2	cyclictest	4039865	-21	kworker/u16:3+events_unbound	10:59:06	4
3658091	99	34	32,2	cyclictest	3657842	-21	kworker/u16:2+events_unbound	07:14:23	4
3923343	2	33	0,1	chrt	3923317	-21	munin-run	09:24:07	7
3658098	99	31	30,0	cyclictest	0	-21	swapper/7	07:09:25	7
3658098	99	31	0,30	cyclictest	3981400	-21	systemd-run	09:54:07	7
3658097	99	31	28,3	cyclictest	4088304	-21	kworker/u16:2+flush-8:0	10:59:21	6
3658091	99	30	28,2	cyclictest	4156131	-21	kworker/u16:4+events_unbound	11:54:20	4
3658098	99	29	28,0	cyclictest	0	-21	swapper/7	09:44:33	7
3658091	99	29	27,2	cyclictest	4039576	-21	kworker/u16:2+events_unbound	10:24:20	4
3658097	99	28	25,2	cyclictest	3884786	-21	kworker/u16:2+events_unbound	09:14:21	6
3658098	99	27	21,5	cyclictest	4185011	-21	latency_hist	11:39:07	7
3658098	99	26	25,0	cyclictest	0	-21	swapper/7	10:49:25	7
3658098	99	26	24,1	cyclictest	0	-21	swapper/7	12:04:28	7
3658097	99	26	23,2	cyclictest	3609487	-21	kworker/u16:3+flush-8:0	07:09:33	6
3658098	99	25	24,0	cyclictest	0	-21	swapper/7	09:09:37	7
3658097	99	25	22,2	cyclictest	3667656	-21	kworker/u16:4+flush-8:0	07:59:26	6
3658091	99	25	23,2	cyclictest	4185045	-21	kworker/u16:1+events_unbound	11:49:21	4
3658091	99	25	23,2	cyclictest	4068928	-21	kworker/u16:0+events_unbound	11:29:31	4
3658091	99	25	23,2	cyclictest	4068928	-21	kworker/u16:0+events_unbound	11:29:31	4
3658091	99	25	23,2	cyclictest	3690637	-21	kworker/u16:0+events_unbound	07:39:22	4
3658098	99	23	22,0	cyclictest	0	-21	swapper/7	09:34:24	7
3658098	99	23	17,5	cyclictest	650	-21	systemd-journal	10:29:07	7
3658093	99	23	19,3	cyclictest	4156131	-21	kworker/u16:4+flush-8:0	11:29:33	5
3658093	99	23	19,3	cyclictest	4156131	-21	kworker/u16:4+flush-8:0	11:29:33	5
3658091	99	23	21,2	cyclictest	3951414	-21	kworker/u16:0+events_unbound	09:59:21	4
3658098	99	22	21,0	cyclictest	0	-21	swapper/7	10:29:35	7
3658097	99	22	20,2	cyclictest	4039865	-21	kworker/u16:3+flush-8:0	11:24:07	6
3658093	99	22	20,2	cyclictest	3836259	-21	kworker/u16:5+events_unbound	08:49:22	5
3658093	99	22	18,3	cyclictest	4107347	-21	pool-/usr/libex	10:59:01	5
3658091	99	22	20,2	cyclictest	4185045	-21	kworker/u16:1+events_unbound	12:29:21	4
3658091	99	22	20,2	cyclictest	3800410	-21	kworker/u16:2+events_unbound	08:44:25	4
3658091	99	22	20,2	cyclictest	3667656	-21	kworker/u16:4+events_unbound	08:29:22	4
3658098	99	21	20,0	cyclictest	0	-21	swapper/7	12:09:21	7
3658097	99	21	19,2	cyclictest	4185045	-21	kworker/u16:1+flush-8:0	11:59:33	6
3658093	99	21	19,2	cyclictest	29997	-21	kworker/u16:2+flush-8:0	12:14:22	5
3658091	99	21	19,2	cyclictest	3836259	-21	kworker/u16:5+events_unbound	08:54:32	4
3658091	99	21	19,2	cyclictest	3826104	-21	kworker/u16:0+events_unbound	08:39:31	4
3658091	99	21	19,2	cyclictest	3788061	-21	kworker/u16:0+events_unbound	08:19:26	4
3658091	99	21	19,2	cyclictest	3788061	-21	kworker/u16:0+events_unbound	08:19:26	4
3658097	99	20	17,2	cyclictest	3972029	-21	kworker/u16:4+events_unbound	10:39:21	6
3658097	99	20	17,2	cyclictest	3719996	-21	kworker/u16:2+events_unbound	08:04:33	6
3658093	99	20	18,2	cyclictest	3690637	-21	kworker/u16:0+events_unbound	07:49:22	5
3658091	99	20	18,2	cyclictest	4185045	-21	kworker/u16:1+events_unbound	11:39:25	4
3658091	99	20	18,2	cyclictest	3719996	-21	kworker/u16:2+flush-8:0	08:14:02	4
3658091	99	20	18,2	cyclictest	3667656	-21	kworker/u16:4+events_unbound	08:24:29	4
3658098	99	19	18,0	cyclictest	0	-21	swapper/7	11:29:27	7
3658098	99	19	18,0	cyclictest	0	-21	swapper/7	11:29:27	7
3658098	99	19	18,0	cyclictest	0	-21	swapper/7	11:19:24	7
3658091	99	19	17,2	cyclictest	3972029	-21	kworker/u16:4+events_unbound	10:39:35	4
3658098	99	18	17,0	cyclictest	0	-21	swapper/7	11:44:34	7
3658098	99	18	17,0	cyclictest	0	-21	swapper/7	10:34:22	7
3658098	99	18	16,1	cyclictest	0	-21	swapper/7	07:49:31	7
3658098	99	18	15,2	cyclictest	1267	-21	snmpd	11:41:55	7
3658093	99	18	16,2	cyclictest	4020493	-21	kworker/u16:0+events_unbound	10:14:22	5
3658093	99	18	16,2	cyclictest	3719996	-21	kworker/u16:2+flush-8:0	08:04:37	5
3658091	99	18	16,2	cyclictest	3972029	-21	kworker/u16:4+flush-8:0	10:39:02	4
3658091	99	18	16,2	cyclictest	3836259	-21	kworker/u16:5+events_unbound	09:14:36	4
3658091	99	18	16,2	cyclictest	3719996	-21	kworker/u16:2+events_unbound	08:04:21	4
3658091	99	18	16,2	cyclictest	3667656	-21	kworker/u16:4+flush-8:0	07:59:23	4
3658091	99	18	16,2	cyclictest	30484	-21	kworker/u16:3+events_unbound	12:24:26	4
3658091	99	18	0,1	cyclictest	0	-21	swapper/4	07:24:32	4
3658098	99	17	15,1	cyclictest	0	-21	swapper/7	10:59:10	7
3658097	99	17	15,2	cyclictest	3855884	-21	kworker/u16:1+events_unbound	09:04:30	6
3658097	99	17	15,2	cyclictest	3609487	-21	kworker/u16:3+events_unbound	07:14:13	6
3658091	99	17	15,2	cyclictest	3836259	-21	kworker/u16:5+events_unbound	08:49:20	4
3658091	99	17	15,2	cyclictest	3826104	-21	kworker/u16:0+events_unbound	08:34:27	4
3658091	99	17	15,2	cyclictest	3609487	-21	kworker/u16:3+flush-8:0	07:09:31	4
3658091	99	17	15,2	cyclictest	30484	-21	kworker/u16:3+events_unbound	12:10:04	4
3658091	99	17	15,2	cyclictest	29997	-21	kworker/u16:2+events_unbound	12:34:20	4
3658098	99	16	6,9	cyclictest	0	-21	swapper/7	09:14:26	7
3658098	99	16	15,0	cyclictest	0	-21	swapper/7	07:44:21	7
3658098	99	16	14,1	cyclictest	0	-21	swapper/7	11:04:32	7
3658097	99	16	14,2	cyclictest	4088304	-21	kworker/u16:2+flush-8:0	11:09:20	6
3658097	99	16	13,2	cyclictest	3972029	-21	kworker/u16:4+events_unbound	10:19:25	6
3658093	99	16	12,3	cyclictest	3884786	-21	kworker/u16:2+events_unbound	09:19:20	5
3658091	99	16	14,2	cyclictest	4088304	-21	kworker/u16:2+events_unbound	11:19:07	4
3658091	99	16	14,2	cyclictest	3972029	-21	kworker/u16:4+events_unbound	10:06:25	4
3658091	99	16	14,2	cyclictest	3972029	-21	kworker/u16:4+events_unbound	09:49:29	4
3658091	99	16	14,2	cyclictest	3836259	-21	kworker/u16:5+events_unbound	08:59:20	4
3658091	99	16	14,2	cyclictest	3667656	-21	kworker/u16:4+events_unbound	07:54:11	4
3658098	99	15	9,5	cyclictest	4010415	-21	latency_hist	10:09:07	7
3658098	99	15	14,0	cyclictest	0	-21	swapper/7	08:04:31	7
3658098	99	15	12,2	cyclictest	0	-21	swapper/7	08:14:30	7
3658098	99	15	11,3	cyclictest	1267	-21	snmpd	11:18:25	7
3658098	99	15	0,14	cyclictest	1267	-21	snmpd	08:33:32	7
3658097	99	15	12,2	cyclictest	4185045	-21	kworker/u16:1+flush-8:0	12:34:33	6
3658091	99	15	13,2	cyclictest	3667656	-21	kworker/u16:4+events_unbound	07:36:18	4
3658091	99	15	13,2	cyclictest	3667656	-21	kworker/u16:4+events_unbound	07:36:18	4
3658098	99	14	0,1	cyclictest	0	-21	swapper/7	08:39:33	7
3658098	99	14	0,13	cyclictest	0	-21	swapper/7	08:59:31	7
3658098	99	14	0,13	cyclictest	0	-21	swapper/7	08:54:31	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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