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 100 highest latencies:

System rack0slot2.osadl.org (updated Fri Dec 26, 2025 00:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2513873	2	98	0,1	sleep7	2511828	-21	kthreadcore	22:19:26	7
2134876	2	55	45,7	sleep4	0	-21	swapper/4	19:06:06	4
2134955	2	52	19,29	sleep7	0	-21	swapper/7	19:07:13	7
2135389	99	51	44,6	cyclictest	2603988	-21	latency_hist	23:09:05	7
2125491	2	47	35,8	sleep5	0	-21	swapper/5	19:04:07	5
2135389	99	44	37,6	cyclictest	2371685	-21	latency_hist	21:09:05	7
2135389	99	40	0,38	cyclictest	650	-21	systemd-journal	19:49:05	7
2135389	99	40	0,38	cyclictest	650	-21	systemd-journal	19:49:05	7
2135380	99	40	37,2	cyclictest	2690943	-21	kworker/u16:3+flush-8:0	00:29:05	5
2135388	99	39	37,2	cyclictest	2373672	-21	kworker/u16:3+flush-8:0	21:29:05	6
2135038	2	39	29,7	sleep6	0	-21	swapper/6	19:08:25	6
2135388	99	37	35,2	cyclictest	2105840	-21	kworker/u16:1+flush-8:0	21:39:05	6
2135380	99	35	32,2	cyclictest	2105840	-21	kworker/u16:1+events_unbound	21:44:20	5
2135389	99	31	25,5	cyclictest	2236042	-21	latency_hist	19:59:06	7
2135388	99	31	29,2	cyclictest	2105840	-21	kworker/u16:1+flush-8:0	20:59:06	6
2135389	99	30	24,5	cyclictest	2332917	-21	latency_hist	20:49:06	7
2135388	99	30	28,2	cyclictest	2690943	-21	kworker/u16:3+events_unbound	23:54:30	6
2135388	99	29	26,2	cyclictest	2353400	-21	kworker/u16:2+flush-8:0	21:09:06	6
2135380	99	29	27,2	cyclictest	2690943	-21	kworker/u16:3+events_unbound	00:04:31	5
2135380	99	29	27,2	cyclictest	2497483	-21	kworker/u16:2+events_unbound	22:39:23	5
2135380	99	29	27,2	cyclictest	2468835	-21	kworker/u16:0+flush-8:0	22:09:05	5
2135388	99	28	25,2	cyclictest	2265736	-21	kworker/u16:0+events_unbound	21:19:19	6
2135388	99	28	25,2	cyclictest	2265736	-21	kworker/u16:0+events_unbound	21:19:19	6
2135380	99	28	26,2	cyclictest	2468835	-21	kworker/u16:0+events_unbound	21:59:19	5
2135388	99	27	25,2	cyclictest	2690943	-21	kworker/u16:3+flush-8:0	00:24:05	6
2135388	99	27	24,2	cyclictest	2589650	-21	kworker/u16:1+events_unbound	23:44:18	6
2135388	99	27	24,2	cyclictest	2589650	-21	kworker/u16:1+events_unbound	23:44:18	6
2135380	99	27	24,2	cyclictest	2652681	-21	kworker/u16:2+events_unbound	23:54:18	5
2135380	99	27	24,2	cyclictest	2526912	-21	kworker/u16:3+events_unbound	22:59:19	5
2658827	2	26	0,1	sleep7	0	-21	swapper/7	23:34:26	7
2135388	99	26	24,2	cyclictest	2560824	-21	kworker/u16:4+flush-8:0	23:19:05	6
2135388	99	26	24,2	cyclictest	2158586	-21	kworker/u16:2+events_unbound	20:09:31	6
2135389	99	25	19,5	cyclictest	2323251	-21	latency_hist	20:44:06	7
2135388	99	25	23,2	cyclictest	2604181	-21	kworker/u16:0+flush-8:0	23:14:05	6
2135388	99	25	23,2	cyclictest	2497483	-21	kworker/u16:2+flush-8:0	22:19:30	6
2135380	99	25	23,2	cyclictest	2652681	-21	kworker/u16:2+events_unbound	23:34:18	5
2135380	99	25	23,2	cyclictest	2526912	-21	kworker/u16:3+flush-8:0	22:29:36	5
2135388	99	24	22,2	cyclictest	2526912	-21	kworker/u16:3+events_unbound	22:34:06	6
2135388	99	24	22,2	cyclictest	2420131	-21	kworker/u16:2+events_unbound	21:39:35	6
2135380	99	24	22,2	cyclictest	2690943	-21	kworker/u16:3+flush-8:0	00:39:00	5
2135380	99	24	22,2	cyclictest	2105840	-21	kworker/u16:1+flush-8:0	21:04:27	5
2135380	99	24	21,2	cyclictest	2690943	-21	kworker/u16:3+events_unbound	23:59:23	5
2135389	99	23	17,5	cyclictest	2352273	-21	latency_hist	20:59:06	7
2135380	99	23	21,2	cyclictest	2589650	-21	kworker/u16:1+events_unbound	23:44:22	5
2135380	99	23	21,2	cyclictest	2589650	-21	kworker/u16:1+events_unbound	23:44:22	5
2135380	99	23	21,2	cyclictest	2265736	-21	kworker/u16:0+flush-8:0	20:59:37	5
2135380	99	23	21,2	cyclictest	2105840	-21	kworker/u16:1+events_unbound	21:34:28	5
2135380	99	22	20,2	cyclictest	2105840	-21	kworker/u16:1+events_unbound	19:39:29	5
2135388	99	21	19,2	cyclictest	2652681	-21	kworker/u16:2+flush-8:0	00:39:05	6
2135388	99	21	19,2	cyclictest	2545556	-21	kworker/u16:0+flush-8:0	22:39:06	6
2135389	99	20	18,1	cyclictest	2226354	-21	basename	19:54:05	7
2135388	99	20	18,2	cyclictest	2652681	-21	kworker/u16:2+flush-8:0	00:29:35	6
2135388	99	20	18,2	cyclictest	2284637	-21	kworker/u16:2+events_unbound	20:44:40	6
2135388	99	20	18,2	cyclictest	2265736	-21	kworker/u16:0+events_unbound	20:19:27	6
2135380	99	20	18,2	cyclictest	2284637	-21	kworker/u16:2+flush-8:0	20:39:34	5
2135380	99	20	17,3	cyclictest	2604181	-21	kworker/u16:0+events_unbound	23:14:30	5
2135389	99	19	13,5	cyclictest	2565278	-21	latency_hist	22:49:05	7
2135388	99	19	17,2	cyclictest	623025	-21	kworker/u16:0+flush-8:0	19:14:37	6
2135388	99	19	17,2	cyclictest	2652681	-21	kworker/u16:2+events_unbound	00:24:18	6
2135388	99	19	17,2	cyclictest	2652681	-21	kworker/u16:2+events_unbound	00:04:33	6
2135380	99	19	17,2	cyclictest	2681062	-21	kworker/u16:0+flush-8:0	23:49:37	5
2135380	99	19	17,2	cyclictest	2105840	-21	kworker/u16:1+flush-8:0	22:44:21	5
2135380	99	19	17,2	cyclictest	2105840	-21	kworker/u16:1+flush-8:0	19:19:21	5
2135389	99	18	14,3	cyclictest	1267	-21	snmpd	22:01:57	7
2135389	99	18	0,16	cyclictest	0	-21	swapper/7	22:04:32	7
2135388	99	18	16,2	cyclictest	2105840	-21	kworker/u16:1+flush-8:0	19:19:24	6
2135380	99	18	16,2	cyclictest	2690943	-21	kworker/u16:3+flush-8:0	00:19:21	5
2135380	99	18	16,2	cyclictest	2265736	-21	kworker/u16:0+flush-8:0	20:29:26	5
2135380	99	18	16,2	cyclictest	2216773	-21	kworker/u16:3+events_unbound	19:54:26	5
2135389	99	17	8,8	cyclictest	0	-21	swapper/7	20:59:25	7
2135389	99	17	13,3	cyclictest	1267	-21	snmpd	23:15:14	7
2135389	99	17	13,3	cyclictest	1267	-21	snmpd	21:25:50	7
2135389	99	17	0,16	cyclictest	0	-21	swapper/7	22:09:31	7
2135389	99	17	0,16	cyclictest	0	-21	swapper/7	22:09:31	7
2135388	99	17	15,2	cyclictest	2265736	-21	kworker/u16:0+events_unbound	20:29:31	6
2135388	99	17	15,2	cyclictest	2168226	-21	kworker/u16:3+flush-8:0	19:24:37	6
2135380	99	17	15,2	cyclictest	2265736	-21	kworker/u16:0+events_unbound	20:14:26	5
2135375	99	17	16,1	cyclictest	0	-21	swapper/4	23:33:15	4
2135375	99	17	16,1	cyclictest	0	-21	swapper/4	23:02:32	4
2135375	99	17	16,1	cyclictest	0	-21	swapper/4	20:58:38	4
2135375	99	17	16,1	cyclictest	0	-21	swapper/4	20:42:15	4
2135375	99	17	16,1	cyclictest	0	-21	swapper/4	19:37:44	4
2135375	99	17	16,1	cyclictest	0	-21	swapper/4	19:20:20	4
2135375	99	17	16,1	cyclictest	0	-21	swapper/4	00:38:47	4
2135375	99	17	16,1	cyclictest	0	-21	swapper/4	00:24:27	4
2135389	99	16	13,2	cyclictest	2168214	-21	basename	19:24:06	7
2135389	99	16	12,3	cyclictest	1267	-21	snmpd	19:09:09	7
2135389	99	16	10,5	cyclictest	2284518	-21	latency_hist	20:24:05	7
2135389	99	16	10,5	cyclictest	2255454	-21	latency_hist	20:09:06	7
2135389	99	16	0,14	cyclictest	0	-21	swapper/7	21:54:30	7
2135389	99	16	0,14	cyclictest	0	-21	swapper/7	21:14:32	7
2135388	99	16	13,2	cyclictest	0	-21	swapper/6	20:49:28	6
2135380	99	16	14,2	cyclictest	2604181	-21	kworker/u16:0+events_unbound	23:34:00	5
2135380	99	16	14,2	cyclictest	1441137	-21	kworker/u16:6+events_unbound	19:09:30	5
2135375	99	16	15,1	cyclictest	0	-21	swapper/4	23:51:41	4
2135375	99	16	15,1	cyclictest	0	-21	swapper/4	23:43:29	4
2135375	99	16	15,1	cyclictest	0	-21	swapper/4	23:34:16	4
2135375	99	16	15,1	cyclictest	0	-21	swapper/4	23:25:03	4
2135375	99	16	15,1	cyclictest	0	-21	swapper/4	23:10:43	4
2135375	99	16	15,1	cyclictest	0	-21	swapper/4	23:08:40	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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