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 Tue Sep 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
2230279	2	51	40,8	sleep5	0	-21	swapper/5	19:06:26	5
2230769	99	45	40,4	cyclictest	2930527	-21	latency_hist	00:19:10	7
2222027	2	45	2,31	sleep7	0	-21	swapper/7	19:04:28	7
2230769	99	36	0,34	cyclictest	2553187	-21	latency_hist	21:44:10	7
2230289	2	36	24,8	sleep4	0	-21	swapper/4	19:06:33	4
2230768	99	35	32,2	cyclictest	2166787	-21	kworker/u16:1+flush-8:0	20:04:29	6
2230769	99	33	25,7	cyclictest	2263641	-21	latency_hist	19:24:11	7
2230462	2	32	21,8	sleep6	0	-21	swapper/6	19:09:00	6
2230769	99	31	25,5	cyclictest	2845243	-21	latency_hist	23:44:10	7
2230759	99	31	29,2	cyclictest	2589675	-21	kworker/u16:1+events_unbound	22:44:39	4
2230763	99	30	28,2	cyclictest	2166787	-21	kworker/u16:1+flush-8:0	20:14:38	5
2230769	99	29	24,4	cyclictest	2906101	-21	latency_hist	00:09:10	7
2230763	99	29	25,3	cyclictest	2589675	-21	kworker/u16:1+flush-8:0	22:24:27	5
2230759	99	29	27,2	cyclictest	2881878	-21	kworker/u16:2+events_unbound	00:09:29	4
2230759	99	29	26,3	cyclictest	2660230	-21	kworker/u16:3+flush-8:0	22:44:10	4
2230769	99	28	21,6	cyclictest	2662592	-21	latency_hist	22:29:10	7
2230759	99	27	25,2	cyclictest	2674887	-21	kworker/u16:4+events_unbound	23:14:40	4
2230759	99	27	25,2	cyclictest	2674887	-21	kworker/u16:4+events_unbound	23:14:40	4
2230763	99	25	22,2	cyclictest	2489884	-21	kworker/u16:1+flush-8:0	21:24:26	5
2230759	99	25	23,2	cyclictest	2563674	-21	kworker/u16:2+flush-8:0	21:54:39	4
2230769	99	24	0,22	cyclictest	2954864	-21	latency_hist	00:29:09	7
2230763	99	24	22,2	cyclictest	2502927	-21	kworker/u16:3+flush-8:0	21:49:36	5
2230763	99	24	22,2	cyclictest	2502927	-21	kworker/u16:3+flush-8:0	21:49:36	5
2230763	99	24	21,2	cyclictest	2674887	-21	kworker/u16:4+events_unbound	23:04:25	5
2230759	99	24	22,2	cyclictest	2502927	-21	kworker/u16:3+events_unbound	21:24:25	4
2230759	99	24	22,2	cyclictest	2166787	-21	kworker/u16:1+flush-8:0	20:14:26	4
2230759	99	24	21,2	cyclictest	2589675	-21	kworker/u16:1+flush-8:0	22:04:10	4
2230759	99	24	21,2	cyclictest	2541046	-21	kworker/u16:0+flush-8:0	22:14:23	4
2230768	99	23	21,2	cyclictest	2322404	-21	kworker/u16:0+flush-8:0	20:24:39	6
2230763	99	23	21,2	cyclictest	2881878	-21	kworker/u16:2+events_unbound	00:14:34	5
2230763	99	23	21,2	cyclictest	2869988	-21	kworker/u16:0+flush-8:0	00:24:25	5
2230763	99	23	21,2	cyclictest	2674887	-21	kworker/u16:4+flush-8:0	23:29:39	5
2230763	99	23	19,4	cyclictest	2166787	-21	kworker/u16:1+flush-8:0	20:09:11	5
2230759	99	23	21,2	cyclictest	2528696	-21	kworker/u16:1+events_unbound	21:34:35	4
2230759	99	23	20,2	cyclictest	2390024	-21	kworker/u16:3+events_unbound	20:34:35	4
2230768	99	22	20,2	cyclictest	2589675	-21	kworker/u16:1+events_unbound	22:24:39	6
2230763	99	22	20,2	cyclictest	2528696	-21	kworker/u16:1+flush-8:0	21:34:27	5
2230763	99	21	19,2	cyclictest	2699150	-21	kworker/u16:2+flush-8:0	22:54:25	5
2230763	99	21	19,2	cyclictest	2502927	-21	kworker/u16:3+events_unbound	22:09:38	5
2230763	99	21	19,2	cyclictest	2390462	-21	kworker/u16:4+flush-8:0	20:59:39	5
2230763	99	21	19,2	cyclictest	2322404	-21	kworker/u16:0+flush-8:0	20:44:38	5
2230759	99	21	20,1	cyclictest	2674887	-21	kworker/u16:4+events_unbound	23:02:04	4
2230759	99	21	19,2	cyclictest	2166787	-21	kworker/u16:1+flush-8:0	19:44:36	4
2230759	99	21	19,2	cyclictest	2166787	-21	kworker/u16:1+flush-8:0	19:44:36	4
2230769	99	20	16,3	cyclictest	126	-21	kswapd0	22:33:27	7
2230768	99	20	16,3	cyclictest	2869988	-21	kworker/u16:0+flush-8:0	23:59:26	6
2230763	99	20	18,2	cyclictest	2758210	-21	kworker/u16:0+flush-8:0	23:09:30	5
2230763	99	20	17,3	cyclictest	2881878	-21	kworker/u16:2+flush-8:0	00:00:50	5
2230763	99	20	16,3	cyclictest	2674887	-21	kworker/u16:4+flush-8:0	22:59:27	5
2230759	99	20	18,2	cyclictest	2166787	-21	kworker/u16:1+flush-8:0	19:39:47	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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