OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #3, slot #1

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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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance

Characteristics of the 50 highest latencies:

System rack3slot1.osadl.org (updated Mon Feb 16, 2026 00:43:26)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
5092	99	103	102	cyclictest	0	-21	swapper/3	18:59:33	3
5090	99	89	86	cyclictest	27537	-21	tune2fs	20:24:31	1
5092	99	83	82	cyclictest	0	-21	swapper/3	23:49:09	3
5092	99	83	82	cyclictest	0	-21	swapper/3	23:29:25	3
5092	99	83	82	cyclictest	0	-21	swapper/3	23:24:23	3
5092	99	83	82	cyclictest	0	-21	swapper/3	23:24:23	3
5092	99	83	82	cyclictest	0	-21	swapper/3	23:14:21	3
5092	99	83	82	cyclictest	0	-21	swapper/3	23:05:21	3
5092	99	83	82	cyclictest	0	-21	swapper/3	22:39:20	3
5092	99	83	82	cyclictest	0	-21	swapper/3	22:39:12	3
5092	99	83	82	cyclictest	0	-21	swapper/3	22:29:18	3
5092	99	83	82	cyclictest	0	-21	swapper/3	22:29:12	3
5092	99	83	82	cyclictest	0	-21	swapper/3	22:14:25	3
5092	99	83	82	cyclictest	0	-21	swapper/3	22:14:25	3
5092	99	83	82	cyclictest	0	-21	swapper/3	21:19:34	3
5092	99	83	82	cyclictest	0	-21	swapper/3	21:19:15	3
5092	99	83	82	cyclictest	0	-21	swapper/3	21:09:33	3
5092	99	83	82	cyclictest	0	-21	swapper/3	21:09:15	3
5092	99	83	82	cyclictest	0	-21	swapper/3	20:49:03	3
5092	99	83	82	cyclictest	0	-21	swapper/3	20:29:39	3
5092	99	83	82	cyclictest	0	-21	swapper/3	20:07:55	3
5092	99	83	82	cyclictest	0	-21	swapper/3	19:39:33	3
5092	99	83	82	cyclictest	0	-21	swapper/3	19:19:31	3
5092	99	83	82	cyclictest	0	-21	swapper/3	18:24:41	3
5090	99	83	82	cyclictest	0	-21	swapper/1	23:49:09	1
5090	99	83	82	cyclictest	0	-21	swapper/1	23:19:10	1
5090	99	83	82	cyclictest	0	-21	swapper/1	23:05:21	1
5090	99	83	82	cyclictest	0	-21	swapper/1	22:39:20	1
5090	99	83	82	cyclictest	0	-21	swapper/1	22:39:12	1
5090	99	83	82	cyclictest	0	-21	swapper/1	22:29:18	1
5090	99	83	82	cyclictest	0	-21	swapper/1	22:29:12	1
5090	99	83	82	cyclictest	0	-21	swapper/1	21:19:15	1
5090	99	83	82	cyclictest	0	-21	swapper/1	20:44:36	1
5090	99	83	82	cyclictest	0	-21	swapper/1	20:29:39	1
5090	99	83	82	cyclictest	0	-21	swapper/1	20:04:32	1
5090	99	83	82	cyclictest	0	-21	swapper/1	19:39:33	1
5090	99	83	82	cyclictest	0	-21	swapper/1	18:24:41	1
5090	99	83	81	cyclictest	29820	-21	tune2fs	21:44:28	1
5090	99	83	81	cyclictest	23146	-21	tune2fs	20:14:31	1
5090	99	83	81	cyclictest	22942	-21	tune2fs	18:59:33	1
5090	99	83	71	cyclictest	8316	-21	tune2fs	23:24:23	1
5090	99	83	71	cyclictest	8316	-21	tune2fs	23:24:23	1
5092	99	82	81	cyclictest	0	-21	swapper/3	21:44:28	3
5092	99	82	81	cyclictest	0	-21	swapper/3	20:49:30	3
5092	99	82	81	cyclictest	0	-21	swapper/3	20:14:31	3
5092	99	82	81	cyclictest	0	-21	swapper/3	19:04:33	3
5090	99	82	81	cyclictest	0	-21	swapper/1	22:14:35	1
5090	99	82	81	cyclictest	0	-21	swapper/1	22:14:35	1
5090	99	82	71	cyclictest	0	-21	swapper/1	21:19:34	1
5090	99	78	76	cyclictest	0	-21	swapper/1	22:44:26	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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