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 50 highest latencies:

System rack0slot2.osadl.org (updated Sat Aug 08, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
265010	2	94	0,1	sleep5	0	-21	swapper/5	21:13:47	5
265010	2	94	0,1	sleep5	0	-21	swapper/5	21:13:47	5
7838	99	58	56,2	cyclictest	215453	-21	kworker/u16:1+events_unbound	21:13:54	6
7838	99	58	56,2	cyclictest	215453	-21	kworker/u16:1+events_unbound	21:13:54	6
7844	99	55	51,2	cyclictest	482955	-21	swap	22:43:54	7
7826	99	52	50,2	cyclictest	483397	-21	kworker/u16:5+events_unbound	23:28:53	4
7834	99	49	46,2	cyclictest	416802	-21	kworker/u16:0+flush-8:0	22:23:37	5
7838	99	48	45,2	cyclictest	60110	-21	kworker/u16:3+flush-8:0	20:08:38	6
7838	99	48	45,2	cyclictest	461890	-21	kworker/u16:3+flush-8:0	22:58:36	6
7834	99	48	44,3	cyclictest	546079	-21	kworker/u16:0+flush-8:0	23:13:47	5
7834	99	48	44,3	cyclictest	546079	-21	kworker/u16:0+flush-8:0	23:13:47	5
7826	99	48	46,2	cyclictest	702919	-21	kworker/u16:1+flush-8:0	00:18:49	4
7834	99	46	44,2	cyclictest	4182058	-21	kworker/u16:2+flush-8:0	19:13:38	5
7834	99	46	43,2	cyclictest	461906	-21	kworker/u16:4+events_unbound	22:53:38	5
7834	99	46	43,2	cyclictest	461906	-21	kworker/u16:4+events_unbound	22:43:38	5
7844	99	45	44,0	cyclictest	0	-21	swapper/7	00:33:57	7
7844	99	45	44,0	cyclictest	0	-21	swapper/7	00:33:57	7
7826	99	45	42,2	cyclictest	483397	-21	kworker/u16:5+flush-8:0	23:48:36	4
7844	99	44	42,1	cyclictest	0	-21	swapper/7	22:03:54	7
7834	99	44	41,2	cyclictest	60110	-21	kworker/u16:3+events_unbound	19:43:37	5
7826	99	44	42,2	cyclictest	653950	-21	kworker/u16:2+flush-8:0	23:58:53	4
7838	99	43	39,2	cyclictest	147561	-21	kworker/u16:0+flush-8:0	20:43:39	6
7834	99	43	42,1	cyclictest	302643	-21	kworker/u16:0+flush-8:0	21:38:38	5
7838	99	42	40,2	cyclictest	727376	-21	kworker/u16:2+events_unbound	00:28:45	6
7838	99	42	40,2	cyclictest	416802	-21	kworker/u16:0+events_unbound	22:18:53	6
7838	99	42	39,2	cyclictest	215453	-21	kworker/u16:1+flush-8:0	22:08:36	6
7834	99	42	40,2	cyclictest	60110	-21	kworker/u16:3+events_unbound	20:38:53	5
7424	2	42	6,31	sleep7	0	-21	swapper/7	19:06:50	7
7844	99	41	37,2	cyclictest	663958	-21	sed	23:58:55	7
7844	99	41	35,5	cyclictest	205556	-21	latency_hist	20:48:23	7
7838	99	41	39,2	cyclictest	483397	-21	kworker/u16:5+flush-8:0	23:53:48	6
7838	99	41	39,2	cyclictest	483397	-21	kworker/u16:5+events_unbound	23:23:36	6
7834	99	41	39,2	cyclictest	98992	-21	kworker/u16:2+flush-8:0	20:23:39	5
7277	2	41	31,7	sleep5	0	-21	swapper/5	19:04:47	5
7838	99	40	38,2	cyclictest	60110	-21	kworker/u16:3+flush-8:0	19:58:38	6
7838	99	40	38,2	cyclictest	316805	-21	kworker/u16:3+events_unbound	21:58:45	6
7834	99	40	37,2	cyclictest	416802	-21	kworker/u16:0+flush-8:0	22:18:50	5
7834	99	40	37,2	cyclictest	215453	-21	kworker/u16:1+events_unbound	20:53:25	5
7826	99	40	38,2	cyclictest	215453	-21	kworker/u16:1+flush-8:0	21:38:48	4
7838	99	39	37,2	cyclictest	350889	-21	kworker/u16:4+events_unbound	22:13:38	6
7838	99	39	37,2	cyclictest	302643	-21	kworker/u16:0+events_unbound	21:48:41	6
7834	99	39	37,2	cyclictest	302643	-21	kworker/u16:0+events_unbound	21:33:54	5
7826	99	39	37,2	cyclictest	302643	-21	kworker/u16:0+events_unbound	21:33:50	4
7826	99	39	37,2	cyclictest	215453	-21	kworker/u16:1+flush-8:0	21:03:39	4
7826	99	39	36,2	cyclictest	256894	-21	kworker/u16:3+events_unbound	21:23:37	4
7316	2	39	28,8	sleep4	0	-21	swapper/4	19:05:18	4
7844	99	38	35,2	cyclictest	216347	-21	fschecks_time	20:53:37	7
7844	99	38	34,2	cyclictest	214926	-21	users	20:48:53	7
7838	99	38	36,2	cyclictest	678733	-21	kworker/u16:0+flush-8:0	00:08:24	6
7838	99	38	36,2	cyclictest	483397	-21	kworker/u16:5+events_unbound	00:23:40	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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