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 Tue Dec 02, 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
3773390	2	59	49,7	sleep5	0	-21	swapper/5	15:19:30	5
3773948	99	55	53,2	cyclictest	3898482	-21	kworker/u16:2+events_unbound	16:57:51	6
3773419	2	54	19,30	sleep7	0	-21	swapper/7	15:19:56	7
3773948	99	44	41,3	cyclictest	3970246	-21	kworker/u16:5+flush-8:0	17:27:51	6
3773949	99	41	0,39	cyclictest	4130964	-21	latency_hist	18:17:51	7
3773944	99	41	38,2	cyclictest	88584	-21	kworker/u16:2+flush-8:0	19:53:13	5
3773949	99	40	35,4	cyclictest	4191451	-21	latency_hist	18:47:51	7
3773949	99	38	0,36	cyclictest	3888715	-21	latency_hist	16:17:52	7
3773525	2	38	28,7	sleep4	0	-21	swapper/4	15:21:22	4
3773949	99	37	34,2	cyclictest	4090621	-21	latency_hist	17:57:52	7
3773948	99	37	35,2	cyclictest	4020308	-21	kworker/u16:2+flush-8:0	17:29:29	6
3773944	99	37	34,2	cyclictest	3773446	-21	kworker/u16:1+events_unbound	15:22:54	5
3773949	99	36	35,0	cyclictest	0	-21	swapper/7	19:43:05	7
3773949	99	35	29,5	cyclictest	68579	-21	latency_hist	19:22:51	7
3773944	99	35	33,2	cyclictest	98913	-21	kworker/u16:1+events_unbound	20:08:15	5
3773949	99	34	28,5	cyclictest	589235	-21	systemd-journal	16:04:11	7
3773944	99	34	31,2	cyclictest	3868596	-21	kworker/u16:0+events_unbound	16:48:10	5
3773518	2	33	23,7	sleep6	0	-21	swapper/6	15:21:16	6
3773944	99	32	30,2	cyclictest	168420	-21	kworker/u16:4+flush-8:0	20:28:14	5
248658	2	32	0,1	chrt	248661	-21	kthreadcore	20:48:15	7
3773944	99	31	29,2	cyclictest	26862	-21	kworker/u16:5+flush-8:0	19:28:22	5
3773937	99	31	28,2	cyclictest	98913	-21	kworker/u16:1+flush-8:0	20:08:16	4
3773949	99	30	25,4	cyclictest	3929022	-21	latency_hist	16:37:51	7
3773949	99	30	24,5	cyclictest	4120875	-21	latency_hist	18:12:51	7
3773949	99	30	0,28	cyclictest	209744	-21	latency_hist	20:32:51	7
3773944	99	30	28,2	cyclictest	4080956	-21	kworker/u16:0+flush-8:0	18:08:21	5
3773944	99	30	28,2	cyclictest	26862	-21	kworker/u16:5+events_unbound	19:08:21	5
3773944	99	30	27,3	cyclictest	3969718	-21	kworker/u16:4+flush-8:0	16:58:07	5
3773944	99	30	26,3	cyclictest	3797749	-21	kworker/u16:3+flush-8:0	15:42:52	5
3773948	99	29	27,2	cyclictest	3797750	-21	kworker/u16:4+flush-8:0	15:43:26	6
3773948	99	29	27,2	cyclictest	3797749	-21	kworker/u16:3+events_unbound	15:53:17	6
3773937	99	29	27,2	cyclictest	168420	-21	kworker/u16:4+flush-8:0	20:43:22	4
3773948	99	28	25,2	cyclictest	88584	-21	kworker/u16:2+flush-8:0	19:48:06	6
3773948	99	28	25,2	cyclictest	3797749	-21	kworker/u16:3+flush-8:0	15:38:05	6
3773944	99	28	26,2	cyclictest	4080956	-21	kworker/u16:0+flush-8:0	19:13:06	5
3773944	99	28	25,2	cyclictest	7467	-21	kworker/u16:1+flush-8:0	18:53:12	5
3773949	99	27	25,1	cyclictest	0	-21	swapper/7	18:18:09	7
3773948	99	27	24,2	cyclictest	98913	-21	kworker/u16:1+events_unbound	20:12:51	6
3773944	99	27	25,2	cyclictest	88584	-21	kworker/u16:2+flush-8:0	19:43:21	5
3773944	99	27	25,2	cyclictest	3773446	-21	kworker/u16:1+events_unbound	15:28:20	5
3773944	99	27	24,2	cyclictest	3832787	-21	kworker/u16:1+flush-8:0	16:18:07	5
3773944	99	27	23,3	cyclictest	3832787	-21	kworker/u16:1+flush-8:0	15:58:23	5
3773944	99	27	23,3	cyclictest	3832787	-21	kworker/u16:1+flush-8:0	15:58:23	5
3773949	99	26	25,0	cyclictest	0	-21	swapper/7	17:33:15	7
3773944	99	26	24,2	cyclictest	3832787	-21	kworker/u16:1+flush-8:0	16:13:18	5
3773937	99	26	24,2	cyclictest	3970246	-21	kworker/u16:5+flush-8:0	17:29:21	4
3773948	99	25	23,2	cyclictest	3784069	-21	kworker/u16:2+flush-8:0	15:28:07	6
3773944	99	25	23,2	cyclictest	4020308	-21	kworker/u16:2+flush-8:0	18:48:22	5
3773948	99	24	21,2	cyclictest	4130751	-21	kworker/u16:1+flush-8:0	18:38:17	6
3773944	99	24	22,2	cyclictest	98913	-21	kworker/u16:1+flush-8:0	19:52:51	5
3773944	99	24	21,2	cyclictest	4130751	-21	kworker/u16:1+flush-8:0	18:37:51	5
3773949	99	23	19,3	cyclictest	3949175	-21	awk	16:47:51	7
3773949	99	23	19,3	cyclictest	3949175	-21	awk	16:47:51	7
3773949	99	23	18,4	cyclictest	589235	-21	systemd-journal	20:17:50	7
3773949	99	23	18,4	cyclictest	4009831	-21	latency_hist	17:17:51	7
3773944	99	23	21,2	cyclictest	3797749	-21	kworker/u16:3+events_unbound	15:43:21	5
3773937	99	23	19,3	cyclictest	3907924	-21	kworker/u16:3+flush-8:0	16:53:23	4
3773949	99	22	0,20	cyclictest	3818166	-21	latency_hist	15:42:52	7
3773948	99	22	20,2	cyclictest	4050151	-21	kworker/u16:1+flush-8:0	17:43:16	6
3773948	99	22	18,3	cyclictest	26862	-21	kworker/u16:5+flush-8:0	19:13:19	6
3773944	99	22	20,2	cyclictest	4080956	-21	kworker/u16:0+flush-8:0	19:38:12	5
3773944	99	22	20,2	cyclictest	3907924	-21	kworker/u16:3+flush-8:0	16:56:47	5
3773944	99	22	19,2	cyclictest	168420	-21	kworker/u16:4+flush-8:0	20:18:16	5
3773937	99	22	20,2	cyclictest	4030413	-21	kworker/u16:0+flush-8:0	17:33:58	4
3773937	99	22	15,6	cyclictest	0	-21	swapper/4	18:08:06	4
3773948	99	21	19,2	cyclictest	3868596	-21	kworker/u16:0+flush-8:0	16:47:51	6
3773948	99	21	19,2	cyclictest	3868596	-21	kworker/u16:0+flush-8:0	16:47:51	6
3773937	99	21	19,2	cyclictest	4080956	-21	kworker/u16:0+events_unbound	19:28:06	4
3773944	99	20	18,2	cyclictest	4020308	-21	kworker/u16:2+flush-8:0	17:38:09	5
3773944	99	20	18,2	cyclictest	3898482	-21	kworker/u16:2+events_unbound	16:33:11	5
3773944	99	20	18,2	cyclictest	3868596	-21	kworker/u16:0+flush-8:0	17:18:21	5
3773944	99	20	18,2	cyclictest	3832787	-21	kworker/u16:1+flush-8:0	17:08:22	5
3773944	99	20	18,2	cyclictest	3784069	-21	kworker/u16:2+events_unbound	15:33:11	5
3773944	99	20	18,2	cyclictest	168420	-21	kworker/u16:4+flush-8:0	20:48:22	5
3773944	99	20	17,2	cyclictest	3832787	-21	kworker/u16:1+events_unbound	16:08:16	5
3773944	99	20	15,4	cyclictest	4039881	-21	packagekitd	17:29:14	5
3773949	99	19	18,0	cyclictest	0	-21	swapper/7	19:48:19	7
3773948	99	19	16,2	cyclictest	3832787	-21	kworker/u16:1+events_unbound	16:08:12	6
3773944	99	19	17,2	cyclictest	4130751	-21	kworker/u16:1+flush-8:0	18:38:07	5
3773944	99	19	17,2	cyclictest	4130751	-21	kworker/u16:1+events_unbound	18:23:05	5
3773944	99	19	17,2	cyclictest	3832787	-21	kworker/u16:1+flush-8:0	16:28:18	5
3773944	99	19	17,2	cyclictest	26862	-21	kworker/u16:5+flush-8:0	19:23:17	5
3773937	99	19	15,3	cyclictest	3970246	-21	kworker/u16:5+flush-8:0	17:23:07	4
3773949	99	18	13,4	cyclictest	17671	-21	latency_hist	18:57:51	7
3773949	99	18	12,5	cyclictest	3797969	-21	latency_hist	15:32:52	7
3773949	99	18	0,17	cyclictest	4184977	-17	auditd	16:27:52	7
3773949	99	18	0,16	cyclictest	589235	-21	systemd-journal	16:18:54	7
3773949	99	18	0,16	cyclictest	4151116	-21	latency_hist	18:27:51	7
3773948	99	18	14,3	cyclictest	3898482	-21	kworker/u16:2+flush-8:0	16:49:23	6
3773944	99	18	16,2	cyclictest	3848507	-21	kworker/u16:2+flush-8:0	16:03:04	5
3773944	99	18	15,2	cyclictest	26862	-21	kworker/u16:5+flush-8:0	19:03:17	5
3773937	99	18	16,2	cyclictest	26862	-21	kworker/u16:5+flush-8:0	19:58:33	4
3773949	99	17	16,0	cyclictest	0	-21	swapper/7	20:43:05	7
3773949	99	17	14,2	cyclictest	4175659	-21	snmpd	18:27:59	7
3773949	99	17	11,5	cyclictest	4181349	-21	latency_hist	18:42:52	7
3773949	99	17	0,15	cyclictest	4175659	-21	snmpd	17:46:46	7
3773948	99	17	15,2	cyclictest	3907924	-21	kworker/u16:3+events_unbound	16:33:15	6
3773944	99	17	15,2	cyclictest	26862	-21	kworker/u16:5+events_unbound	20:23:08	5
3773944	99	17	14,2	cyclictest	4020308	-21	kworker/u16:2+flush-8:0	17:36:50	5
3773937	99	17	14,2	cyclictest	3868596	-21	kworker/u16:0+events_unbound	16:48:16	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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