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 50 highest latencies:

System rack0slot2.osadl.org (updated Sat Mar 28, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2497568	2	142	0,1	sleep6	0	-21	swapper/6	07:13:16	6
2497568	2	142	0,1	sleep6	0	-21	swapper/6	07:13:16	6
2688405	2	101	0,1	sleep7	2688407	-21	kthreadcore	08:53:16	7
3038942	2	95	0,0	sleep5	0	-21	swapper/5	11:22:54	5
3027496	2	60	0,0	sleep7	3027494	-21	tr	11:18:07	7
2466895	2	59	48,7	sleep5	0	-21	swapper/5	07:02:34	5
2467216	99	57	55,2	cyclictest	3148694	-21	kworker/u16:1+events_unbound	12:13:28	4
2467216	99	56	53,2	cyclictest	3051053	-21	kworker/u16:4+events_unbound	11:33:26	4
2466624	2	56	46,7	sleep6	0	-21	swapper/6	06:58:42	6
2467222	99	55	53,2	cyclictest	2759281	-21	kworker/u16:5+events_unbound	09:30:50	6
2467222	99	54	52,2	cyclictest	3084856	-21	kworker/u16:0+events_unbound	12:28:27	6
2466856	2	54	42,7	sleep4	0	-21	swapper/4	07:02:01	4
2467216	99	53	50,2	cyclictest	2927871	-21	kworker/u16:2+events_unbound	10:48:29	4
2467222	99	52	50,2	cyclictest	2890948	-21	kworker/u16:3+flush-8:0	11:03:29	6
2467216	99	52	49,2	cyclictest	2927871	-21	kworker/u16:2+events_unbound	11:28:27	4
2467216	99	52	49,2	cyclictest	2821846	-21	kworker/u16:0+flush-8:0	09:58:20	4
2467225	99	50	43,5	cyclictest	2509065	-21	latency_hist	07:22:55	7
2467222	99	50	48,2	cyclictest	3148694	-21	kworker/u16:1+events_unbound	12:13:24	6
2467222	99	50	48,2	cyclictest	2857670	-21	kworker/u16:2+flush-8:0	10:13:25	6
2467216	99	50	47,2	cyclictest	2927871	-21	kworker/u16:2+events_unbound	11:13:24	4
2467222	99	49	47,2	cyclictest	2927871	-21	kworker/u16:2+events_unbound	10:38:16	6
2467222	99	49	47,2	cyclictest	2773134	-21	kworker/u16:1+flush-8:0	09:48:20	6
2467216	99	49	47,2	cyclictest	2821846	-21	kworker/u16:0+flush-8:0	10:18:10	4
2467222	99	48	47,1	cyclictest	2890948	-21	kworker/u16:3+events_unbound	11:23:28	6
2467216	99	48	46,2	cyclictest	2759281	-21	kworker/u16:5+events_unbound	09:43:21	4
2467222	99	46	44,2	cyclictest	2890948	-21	kworker/u16:3+events_unbound	10:53:07	6
2467216	99	46	44,2	cyclictest	2773134	-21	kworker/u16:1+events_unbound	09:33:17	4
2467216	99	46	44,2	cyclictest	2537748	-21	kworker/u16:2+events_unbound	09:25:53	4
2467216	99	46	44,2	cyclictest	2537748	-21	kworker/u16:2+events_unbound	09:25:53	4
2467216	99	46	43,2	cyclictest	1488360	-21	kworker/u16:1+events_unbound	07:03:10	4
2467225	99	45	41,2	cyclictest	3088481	-21	iostat	11:43:09	7
2467216	99	45	43,2	cyclictest	2906247	-21	kworker/u16:0+events_unbound	10:33:17	4
2467216	99	45	43,2	cyclictest	2759281	-21	kworker/u16:5+events_unbound	10:13:09	4
2467216	99	45	42,2	cyclictest	2773134	-21	kworker/u16:1+events_unbound	09:53:21	4
2467222	99	44	42,2	cyclictest	3051053	-21	kworker/u16:4+events_unbound	11:33:28	6
2467222	99	44	42,2	cyclictest	2927871	-21	kworker/u16:2+events_unbound	11:12:32	6
2467220	99	44	41,2	cyclictest	3051053	-21	kworker/u16:4+flush-8:0	11:47:49	5
2467216	99	44	42,2	cyclictest	3148694	-21	kworker/u16:1+flush-8:0	12:18:29	4
2467216	99	44	42,2	cyclictest	3084856	-21	kworker/u16:0+events_unbound	11:44:17	4
2467216	99	44	42,2	cyclictest	2927871	-21	kworker/u16:2+events_unbound	11:11:37	4
2467216	99	44	42,2	cyclictest	2773134	-21	kworker/u16:1+events_unbound	09:48:37	4
2467222	99	43	41,2	cyclictest	3084856	-21	kworker/u16:0+events_unbound	11:54:29	6
2467222	99	43	41,2	cyclictest	2966454	-21	kworker/u16:0+events_unbound	11:02:32	6
2467222	99	43	41,2	cyclictest	2857670	-21	kworker/u16:2+events_unbound	10:21:08	6
2467222	99	43	41,2	cyclictest	2671899	-21	kworker/u16:1+events_unbound	09:17:33	6
2467216	99	43	41,2	cyclictest	3084856	-21	kworker/u16:0+events_unbound	11:40:01	4
2467216	99	43	41,2	cyclictest	2890948	-21	kworker/u16:3+events_unbound	11:55:04	4
2467216	99	43	40,2	cyclictest	2773134	-21	kworker/u16:1+events_unbound	10:05:28	4
2467216	99	43	40,2	cyclictest	2661861	-21	kworker/u16:0+events_unbound	09:11:18	4
2467225	99	42	40,1	cyclictest	3016002	-21	/usr/sbin/munin	11:13:09	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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