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 Thu Apr 02, 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
1888121	2	61	50,7	sleep5	0	-21	swapper/5	19:00:50	5
1888539	99	49	0,47	cyclictest	2421733	-21	grep	23:07:36	7
1888064	2	49	39,7	sleep4	0	-21	swapper/4	19:00:00	4
1888535	99	48	45,2	cyclictest	2218010	-21	kworker/u16:2+events_unbound	22:17:39	6
1888535	99	46	44,2	cyclictest	2469824	-21	kworker/u16:4+events_unbound	23:37:39	6
1888539	99	44	39,4	cyclictest	2589828	-21	latency_hist	00:17:36	7
1888535	99	43	41,2	cyclictest	2312383	-21	kworker/u16:1+events_unbound	23:25:16	6
1888535	99	43	41,2	cyclictest	2312383	-21	kworker/u16:1+events_unbound	23:15:24	6
1888535	99	43	41,2	cyclictest	2218010	-21	kworker/u16:2+events_unbound	22:02:31	6
1888535	99	42	40,2	cyclictest	2601895	-21	kworker/u16:3+events_unbound	00:30:27	6
1888535	99	41	39,2	cyclictest	2361765	-21	kworker/u16:4+events_unbound	23:04:34	6
1888535	99	41	39,2	cyclictest	2312383	-21	kworker/u16:1+events_unbound	22:29:15	6
1888535	99	41	39,2	cyclictest	2168136	-21	kworker/u16:0+events_unbound	21:20:04	6
1888535	99	41	39,2	cyclictest	2146081	-21	kworker/u16:4+events_unbound	21:56:51	6
1888535	99	41	39,2	cyclictest	2054659	-21	kworker/u16:0+events_unbound	21:06:59	6
1888539	99	40	0,38	cyclictest	2385824	-21	latency_hist	22:52:37	7
1888535	99	40	38,2	cyclictest	2588217	-21	kworker/u16:2+events_unbound	00:16:11	6
1888535	99	40	38,2	cyclictest	2422153	-21	kworker/u16:0+events_unbound	23:21:55	6
1888535	99	40	38,2	cyclictest	2312383	-21	kworker/u16:1+events_unbound	22:54:24	6
1888535	99	40	38,2	cyclictest	2026350	-21	kworker/u16:1+events_unbound	21:28:19	6
1888004	2	40	4,31	sleep7	0	-21	swapper/7	18:59:07	7
1888535	99	39	37,2	cyclictest	2588217	-21	kworker/u16:2+events_unbound	00:23:15	6
1888535	99	39	37,2	cyclictest	2588217	-21	kworker/u16:2+events_unbound	00:23:15	6
1888535	99	39	37,2	cyclictest	2564816	-21	kworker/u16:0+events_unbound	00:11:59	6
1888535	99	39	37,2	cyclictest	2530209	-21	kworker/u16:2+events_unbound	23:56:40	6
1888535	99	39	37,2	cyclictest	2253691	-21	kworker/u16:0+events_unbound	22:06:04	6
1888535	99	39	37,2	cyclictest	2146081	-21	kworker/u16:4+events_unbound	22:12:15	6
1888535	99	38	36,2	cyclictest	2530209	-21	kworker/u16:2+events_unbound	00:03:11	6
1888535	99	38	36,2	cyclictest	2146081	-21	kworker/u16:4+events_unbound	21:44:12	6
1888535	99	38	36,2	cyclictest	2146081	-21	kworker/u16:4+events_unbound	21:25:11	6
1888535	99	37	35,2	cyclictest	2564816	-21	kworker/u16:0+events_unbound	00:18:30	6
1888535	99	37	35,2	cyclictest	2545266	-21	kworker/u16:3+events_unbound	23:59:56	6
1888535	99	37	35,2	cyclictest	2443572	-21	kworker/u16:2+events_unbound	23:31:20	6
1888535	99	37	35,2	cyclictest	2361765	-21	kworker/u16:4+events_unbound	23:10:59	6
1888535	99	37	35,2	cyclictest	2326102	-21	kworker/u16:0+events_unbound	22:46:00	6
1888535	99	37	35,2	cyclictest	2218010	-21	kworker/u16:2+events_unbound	22:26:47	6
1888535	99	37	35,2	cyclictest	2218010	-21	kworker/u16:2+events_unbound	22:26:47	6
1888535	99	37	35,2	cyclictest	2026350	-21	kworker/u16:1+events_unbound	21:48:24	6
1888535	99	37	35,2	cyclictest	1879132	-21	kworker/u16:2+flush-8:0	20:27:37	6
1888535	99	36	34,2	cyclictest	2503491	-21	kworker/u16:0+events_unbound	23:46:07	6
1888535	99	36	34,2	cyclictest	2469824	-21	kworker/u16:4+events_unbound	23:35:24	6
1888535	99	36	34,2	cyclictest	2326102	-21	kworker/u16:0+events_unbound	22:48:36	6
1888535	99	36	34,2	cyclictest	2326102	-21	kworker/u16:0+events_unbound	22:41:28	6
1888535	99	36	34,2	cyclictest	2312383	-21	kworker/u16:1+events_unbound	22:58:55	6
1888535	99	36	34,2	cyclictest	2146081	-21	kworker/u16:4+events_unbound	21:41:03	6
1888535	99	36	34,2	cyclictest	2146081	-21	kworker/u16:4+events_unbound	21:14:24	6
1888535	99	36	34,2	cyclictest	2026350	-21	kworker/u16:1+events_unbound	21:34:48	6
1888535	99	35	33,2	cyclictest	2326102	-21	kworker/u16:0+events_unbound	22:36:19	6
1888535	99	35	33,2	cyclictest	2218010	-21	kworker/u16:2+events_unbound	22:16:19	6
1888535	99	35	33,2	cyclictest	2054659	-21	kworker/u16:0+events_unbound	21:12:09	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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