OSADL QA Farm on Real-time of Mainline Linux

About - Hardware - CPUs - Benchmarks - Graphics - Benchmarks - Kernels - Boards/Distros - Latency monitoring - Latency plots - System data - Profiles - Compare - Awards

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 Wed Jul 22, 2026 00:43:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3225403	2	104	0,1	sleep5	0	-21	swapper/5	22:44:41	5
2755148	2	56	22,29	sleep7	0	-21	swapper/7	19:05:52	7
2755306	2	46	36,7	sleep5	0	-21	swapper/5	19:08:06	5
2755708	99	45	42,2	cyclictest	2984033	-21	fschecks_time	21:04:45	7
2746139	2	44	32,8	sleep4	0	-21	swapper/4	19:04:36	4
2755708	99	35	33,1	cyclictest	0	-21	swapper/7	00:00:29	7
2755708	99	34	31,2	cyclictest	2805662	-21	kthreadcore	19:29:49	7
2755260	2	32	21,8	sleep6	0	-21	swapper/6	19:07:27	6
2755699	99	30	28,2	cyclictest	3261130	-21	kworker/u16:0+events_unbound	23:11:06	4
2755702	99	29	27,2	cyclictest	3371300	-21	kworker/u16:1+flush-8:0	23:59:46	5
2755699	99	29	27,2	cyclictest	3405148	-21	kworker/u16:0+events_unbound	23:59:44	4
3333656	2	28	0,1	chrt	3333657	-21	sh	23:28:27	7
3333656	2	28	0,1	chrt	3333657	-21	sh	23:28:27	7
2755708	99	28	27,0	cyclictest	0	-21	swapper/7	21:24:38	7
2755699	99	27	25,2	cyclictest	3179361	-21	kworker/u16:1+events_unbound	23:01:51	4
2755699	99	27	25,2	cyclictest	3051396	-21	kworker/u16:4+flush-8:0	21:51:43	4
2755699	99	27	25,2	cyclictest	3004992	-21	kworker/u16:2+events_unbound	23:19:44	4
2755699	99	27	25,2	cyclictest	2797945	-21	kworker/u16:2+events_unbound	20:54:42	4
2755708	99	26	0,24	cyclictest	3103056	-21	cat	21:54:40	7
2755699	99	26	24,2	cyclictest	3371300	-21	kworker/u16:1+events_unbound	23:46:36	4
2755699	99	26	24,2	cyclictest	3004992	-21	kworker/u16:2+events_unbound	00:19:11	4
2755699	99	26	24,2	cyclictest	3004992	-21	kworker/u16:2+events_unbound	00:06:44	4
2755699	99	26	24,2	cyclictest	2966517	-21	kworker/u16:3+events_unbound	21:42:52	4
2755699	99	26	24,2	cyclictest	2966517	-21	kworker/u16:3+events_unbound	21:16:23	4
2755699	99	26	24,2	cyclictest	2966517	-21	kworker/u16:3+events_unbound	21:12:27	4
2755699	99	26	24,2	cyclictest	2809141	-21	kworker/u16:1+events_unbound	20:29:15	4
2755699	99	26	23,2	cyclictest	2797945	-21	kworker/u16:2+flush-8:0	20:09:29	4
2755699	99	26	21,4	cyclictest	3029252	-21	cat	21:24:23	4
2755699	99	26	21,4	cyclictest	3029252	-21	cat	21:24:23	4
2755708	99	25	24,0	cyclictest	0	-21	swapper/7	21:16:58	7
2755702	99	25	20,4	cyclictest	2778788	-21	latency_hist	19:19:29	5
2755702	99	25	20,4	cyclictest	2778788	-21	latency_hist	19:19:29	5
2755699	99	25	23,2	cyclictest	3371300	-21	kworker/u16:1+events_unbound	23:53:15	4
2755699	99	25	23,2	cyclictest	3090410	-21	kworker/u16:5+events_unbound	22:27:04	4
2755699	99	25	23,2	cyclictest	3051396	-21	kworker/u16:4+events_unbound	22:06:31	4
2755699	99	25	23,2	cyclictest	3051396	-21	kworker/u16:4+events_unbound	21:55:40	4
2755699	99	25	23,2	cyclictest	3004992	-21	kworker/u16:2+flush-8:0	23:31:23	4
2755699	99	25	23,2	cyclictest	3004992	-21	kworker/u16:2+events_unbound	21:47:47	4
2755699	99	25	23,2	cyclictest	2966517	-21	kworker/u16:3+events_unbound	22:53:31	4
2755699	99	25	23,2	cyclictest	2919591	-21	kworker/u16:0+flush-8:0	20:37:42	4
2755699	99	25	23,2	cyclictest	2886738	-21	kworker/u16:3+events_unbound	20:30:43	4
2755699	99	25	23,2	cyclictest	2809141	-21	kworker/u16:1+events_unbound	20:52:29	4
2755699	99	25	23,2	cyclictest	2777820	-21	kworker/u16:3+events_unbound	19:35:17	4
2755699	99	25	23,2	cyclictest	2769969	-21	kworker/u16:0+events_unbound	19:33:47	4
2755699	99	25	22,2	cyclictest	3004992	-21	kworker/u16:2+events_unbound	23:07:10	4
3044956	2	24	0,1	chrt	0	-21	swapper/5	21:29:48	5
2755699	99	24	22,2	cyclictest	3468790	-21	kworker/u16:1+events_unbound	00:39:09	4
2755699	99	24	22,2	cyclictest	3468789	-21	kworker/u16:0+events_unbound	00:29:26	4
2755699	99	24	22,2	cyclictest	3090410	-21	kworker/u16:5+events_unbound	22:13:55	4
2755699	99	24	22,2	cyclictest	3029773	-21	kworker/u16:1+events_unbound	21:33:18	4
2755699	99	24	22,2	cyclictest	3004992	-21	kworker/u16:2+flush-8:0	22:00:36	4
2755699	99	24	22,2	cyclictest	3004992	-21	kworker/u16:2+events_unbound	22:36:56	4
2755699	99	24	22,2	cyclictest	2966517	-21	kworker/u16:3+flush-8:0	21:25:16	4
2755699	99	24	22,2	cyclictest	2966517	-21	kworker/u16:3+events_unbound	22:58:05	4
2755708	99	23	20,2	cyclictest	3319176	-21	find	23:19:59	7
2755702	99	23	22,1	cyclictest	3407889	-21	kworker/u16:4+events_unbound	00:10:33	5
2755699	99	23	21,2	cyclictest	3491884	-21	kworker/u16:3+events_unbound	00:33:31	4
2755699	99	23	21,2	cyclictest	3261130	-21	kworker/u16:0+events_unbound	23:25:36	4
2755699	99	23	21,2	cyclictest	3261130	-21	kworker/u16:0+events_unbound	23:25:36	4
2755699	99	23	21,2	cyclictest	3261130	-21	kworker/u16:0+events_unbound	23:19:07	4
2755699	99	23	21,2	cyclictest	2981938	-21	kworker/u16:5+flush-8:0	21:00:34	4
2755699	99	23	21,2	cyclictest	2847086	-21	kworker/u16:4+flush-8:0	20:19:13	4
2755699	99	23	21,2	cyclictest	2737289	-21	kworker/u16:1+flush-8:0	19:12:18	4
2755704	99	22	16,5	cyclictest	2765246	-21	latency_hist	19:14:28	6
2755702	99	22	20,2	cyclictest	2847086	-21	kworker/u16:4+flush-8:0	20:14:54	5
2755702	99	22	19,2	cyclictest	3004993	-21	kworker/u16:4+flush-8:0	21:19:29	5
2755702	99	22	19,2	cyclictest	3004993	-21	kworker/u16:4+flush-8:0	21:19:29	5
2755702	99	22	18,3	cyclictest	2966517	-21	kworker/u16:3+flush-8:0	22:54:27	5
2755702	99	22	18,3	cyclictest	2797945	-21	kworker/u16:2+flush-8:0	19:44:57	5
2755699	99	22	20,2	cyclictest	3405148	-21	kworker/u16:0+events_unbound	23:55:30	4
2755699	99	22	20,2	cyclictest	3090410	-21	kworker/u16:5+events_unbound	22:39:36	4
2755699	99	22	20,2	cyclictest	3090410	-21	kworker/u16:5+events_unbound	22:15:58	4
2755699	99	22	20,2	cyclictest	3004992	-21	kworker/u16:2+events_unbound	22:21:03	4
2755699	99	22	20,2	cyclictest	2809141	-21	kworker/u16:1+flush-8:0	21:09:24	4
2755699	99	22	20,2	cyclictest	2797945	-21	kworker/u16:2+events_unbound	20:12:11	4
2755699	99	22	20,2	cyclictest	2797945	-21	kworker/u16:2+events_unbound	19:47:09	4
2755699	99	22	20,2	cyclictest	2769969	-21	kworker/u16:0+events_unbound	19:23:57	4
2926929	2	21	0,1	chrt	2926930	-21	kthreadcore	20:34:45	7
2755708	99	21	18,2	cyclictest	3024638	-21	cut	21:19:54	7
2755708	99	21	18,2	cyclictest	3024638	-21	cut	21:19:54	7
2755699	99	21	19,2	cyclictest	3346925	-21	kworker/u16:3+events_unbound	23:44:22	4
2755699	99	21	19,2	cyclictest	3090410	-21	kworker/u16:5+events_unbound	22:46:52	4
2755699	99	21	19,2	cyclictest	2855593	-21	kworker/u16:5+events_unbound	19:55:09	4
2755699	99	21	19,2	cyclictest	2809141	-21	kworker/u16:1+events_unbound	19:51:13	4
2755699	99	21	19,2	cyclictest	2769969	-21	kworker/u16:0+events_unbound	19:41:21	4
2755699	99	20	18,2	cyclictest	3090410	-21	kworker/u16:5+flush-8:0	22:33:22	4
2755699	99	20	18,2	cyclictest	2809141	-21	kworker/u16:1+events_unbound	20:01:26	4
2755699	99	20	18,2	cyclictest	2797945	-21	kworker/u16:2+events_unbound	20:48:01	4
2755708	99	19	18,0	cyclictest	0	-21	swapper/7	19:44:28	7
2755708	99	19	0,17	cyclictest	3370535	-21	sh	23:43:46	7
2755702	99	19	17,2	cyclictest	2769969	-21	kworker/u16:0+flush-8:0	19:24:44	5
2755699	99	19	17,2	cyclictest	2966517	-21	kworker/u16:3+flush-8:0	21:35:32	4
2755699	99	19	17,2	cyclictest	2809141	-21	kworker/u16:1+events_unbound	20:19:33	4
2755708	99	18	17,0	cyclictest	0	-21	swapper/7	21:50:57	7
2755708	99	18	16,1	cyclictest	3298689	-21	ssh	23:14:44	7
2755708	99	18	14,3	cyclictest	1302	-21	snmpd	20:49:04	7
2755708	99	18	14,3	cyclictest	1302	-21	snmpd	19:16:23	7
2755708	99	18	14,3	cyclictest	1302	-21	snmpd	19:16:23	7
2755704	99	18	8,4	cyclictest	2866420	-21	cat	20:04:29	6
2755704	99	18	11,6	cyclictest	3004815	-21	latency_hist	21:14:28	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


Access: public		Short link to this page
This page was last modified on 2019-05-28 - 00:17