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 Wed Jul 22, 2026 12:43:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1631880	2	53	18,30	sleep7	0	-21	swapper/7	07:09:15	7
2231266	2	50	0,0	sleep7	2231269	-21	cut	11:34:46	7
1631689	2	42	32,7	sleep6	0	-21	swapper/6	07:06:33	6
2374091	2	41	0,0	sleep7	2374090	-21	if_err_p4p1	12:34:41	7
1631660	2	37	26,8	sleep4	0	-21	swapper/4	07:06:07	4
1632163	99	35	31,3	cyclictest	2224890	-21	kworker/u16:0+flush-8:0	11:34:20	4
1631737	2	34	24,7	sleep5	0	-21	swapper/5	07:07:12	5
1632172	99	33	32,0	cyclictest	0	-21	swapper/7	08:19:26	7
1632172	99	33	32,0	cyclictest	0	-21	swapper/7	08:19:26	7
1632172	99	31	30,0	cyclictest	0	-21	swapper/7	10:51:45	7
1954151	2	30	0,1	sleep6	0	-21	swapper/6	09:42:25	6
1632172	99	30	29,0	cyclictest	0	-21	swapper/7	12:13:11	7
1632163	99	28	26,2	cyclictest	1868840	-21	kworker/u16:4+events_unbound	09:34:56	4
1632168	99	27	21,3	cyclictest	1801177	-21	awk	08:34:26	6
1632163	99	27	25,2	cyclictest	2224890	-21	kworker/u16:0+flush-8:0	11:45:12	4
1632163	99	27	22,4	cyclictest	1762284	-21	latency_hist	08:14:26	4
1632172	99	26	22,2	cyclictest	2275703	-21	perl	11:54:42	7
1632166	99	26	24,2	cyclictest	2040584	-21	kworker/u16:2+events_unbound	10:29:40	5
1632163	99	26	24,2	cyclictest	2126917	-21	kworker/u16:2+flush-8:0	10:59:21	4
1632163	99	26	24,2	cyclictest	1811256	-21	kworker/u16:0+flush-8:0	09:14:20	4
1632163	99	26	23,2	cyclictest	2296542	-21	kworker/u16:3+flush-8:0	12:16:15	4
1632172	99	25	24,0	cyclictest	0	-21	swapper/7	11:51:23	7
1632166	99	25	21,3	cyclictest	1907231	-21	diskstats	09:24:43	5
1632163	99	25	23,2	cyclictest	1889288	-21	kworker/u16:2+flush-8:0	09:29:56	4
2378362	2	24	0,0	sleep5	0	-21	swapper/5	12:34:47	5
1632172	99	24	23,0	cyclictest	0	-21	swapper/7	10:01:23	7
1632172	99	24	23,0	cyclictest	0	-21	swapper/7	09:51:39	7
1632172	99	24	23,0	cyclictest	0	-21	swapper/7	08:54:21	7
1632172	99	24	23,0	cyclictest	0	-21	swapper/7	08:26:40	7
1632172	99	24	23,0	cyclictest	0	-21	swapper/7	07:56:13	7
1632172	99	24	22,1	cyclictest	2200259	-21	ssh	11:23:18	7
1632166	99	24	22,2	cyclictest	2026948	-21	kworker/u16:1+flush-8:0	12:04:47	5
1632163	99	24	22,2	cyclictest	1942269	-21	kworker/u16:0+flush-8:0	10:00:25	4
1632163	99	24	21,2	cyclictest	1771959	-21	kworker/u16:4+flush-8:0	08:19:52	4
1632172	99	23	22,0	cyclictest	0	-21	swapper/7	11:00:46	7
1632172	99	23	22,0	cyclictest	0	-21	swapper/7	09:19:14	7
1632172	99	23	22,0	cyclictest	0	-21	swapper/7	09:03:44	7
1632172	99	23	20,2	cyclictest	2297644	-21	sh	12:02:00	7
1632166	99	23	21,2	cyclictest	2113795	-21	kworker/u16:0+flush-8:0	11:18:23	5
1632163	99	23	21,2	cyclictest	2040584	-21	kworker/u16:2+events_unbound	10:46:53	4
1632172	99	22	21,0	cyclictest	0	-21	swapper/7	12:32:14	7
1632172	99	22	21,0	cyclictest	0	-21	swapper/7	11:49:22	7
1632172	99	22	19,2	cyclictest	2043103	-21	kthreadcore	10:19:44	7
1632172	99	22	19,2	cyclictest	2043103	-21	kthreadcore	10:19:44	7
1632166	99	22	17,4	cyclictest	1752558	-21	latency_hist	08:09:26	5
1632163	99	22	20,2	cyclictest	2026948	-21	kworker/u16:1+flush-8:0	10:39:52	4
1632163	99	22	20,2	cyclictest	1868840	-21	kworker/u16:4+events_unbound	09:55:00	4
1632163	99	22	20,2	cyclictest	1712722	-21	kworker/u16:1+flush-8:0	08:34:42	4
1632172	99	21	20,0	cyclictest	0	-21	swapper/7	07:19:54	7
1632172	99	21	19,1	cyclictest	0	-21	swapper/7	10:05:37	7
1632166	99	21	17,3	cyclictest	1712722	-21	kworker/u16:1+flush-8:0	08:18:31	5
1632166	99	21	17,3	cyclictest	1712722	-21	kworker/u16:1+flush-8:0	08:18:31	5
1632163	99	21	19,2	cyclictest	2224890	-21	kworker/u16:0+flush-8:0	11:49:36	4
1632163	99	21	19,2	cyclictest	1829436	-21	kworker/u16:3+flush-8:0	09:04:57	4
1632163	99	21	19,2	cyclictest	1656940	-21	kworker/u16:3+events_unbound	07:34:45	4
1632172	99	20	19,0	cyclictest	0	-21	swapper/7	12:20:01	7
1632172	99	20	19,0	cyclictest	0	-21	swapper/7	11:41:33	7
1632172	99	20	19,0	cyclictest	0	-21	swapper/7	11:30:47	7
1632172	99	20	19,0	cyclictest	0	-21	swapper/7	08:13:19	7
1632168	99	20	16,3	cyclictest	1820731	-21	cat	08:44:26	6
1632166	99	20	16,3	cyclictest	1868840	-21	kworker/u16:4+flush-8:0	10:29:26	5
1632172	99	19	18,0	cyclictest	0	-21	swapper/7	07:27:12	7
1632166	99	19	17,2	cyclictest	2026948	-21	kworker/u16:1+flush-8:0	12:04:21	5
1632163	99	19	17,2	cyclictest	2126917	-21	kworker/u16:2+flush-8:0	11:12:16	4
1632163	99	19	17,2	cyclictest	2067257	-21	kworker/u16:0+flush-8:0	10:29:51	4
1632163	99	19	16,2	cyclictest	2237465	-21	kworker/u16:3+events_unbound	11:44:25	4
1632172	99	18	17,0	cyclictest	0	-21	swapper/7	10:58:42	7
1632166	99	18	16,2	cyclictest	1568309	-21	kworker/u16:0+flush-8:0	07:29:41	5
1632163	99	18	16,2	cyclictest	2296542	-21	kworker/u16:3+flush-8:0	12:25:08	4
1632163	99	18	16,2	cyclictest	2296542	-21	kworker/u16:3+flush-8:0	12:25:08	4
1632163	99	18	16,2	cyclictest	2250319	-21	kworker/u16:2+events_unbound	12:35:35	4
1632163	99	18	16,2	cyclictest	2224890	-21	kworker/u16:0+events_unbound	11:56:36	4
1632163	99	18	16,2	cyclictest	2126917	-21	kworker/u16:2+events_unbound	11:24:35	4
1632163	99	18	16,2	cyclictest	1889288	-21	kworker/u16:2+events_unbound	09:19:42	4
1632172	99	17	16,0	cyclictest	0	-21	swapper/7	11:25:10	7
1632172	99	17	16,0	cyclictest	0	-21	swapper/7	10:40:03	7
1632172	99	17	16,0	cyclictest	0	-21	swapper/7	08:49:00	7
1632172	99	17	16,0	cyclictest	0	-21	swapper/7	07:35:32	7
1632172	99	17	15,1	cyclictest	1916470	-21	taskset	09:25:55	7
1632172	99	17	14,2	cyclictest	1302	-21	snmpd	09:06:49	7
1632168	99	17	0,1	cyclictest	86	-21	ksoftirqd/6	12:10:13	6
1632163	99	17	15,2	cyclictest	2026948	-21	kworker/u16:1+events_unbound	12:07:36	4
1632163	99	17	15,2	cyclictest	2026948	-21	kworker/u16:1+events_unbound	10:19:38	4
1632163	99	17	15,2	cyclictest	2026948	-21	kworker/u16:1+events_unbound	10:19:38	4
1632163	99	17	15,2	cyclictest	1868840	-21	kworker/u16:4+flush-8:0	09:44:45	4
1632163	99	17	15,2	cyclictest	1712722	-21	kworker/u16:1+events_unbound	08:29:44	4
1632172	99	16	15,0	cyclictest	0	-21	swapper/7	07:48:55	7
1632172	99	16	15,0	cyclictest	0	-21	swapper/7	07:12:54	7
1632172	99	16	12,3	cyclictest	1302	-21	snmpd	10:31:09	7
1632172	99	16	0,14	cyclictest	0	-21	swapper/7	07:29:48	7
1632168	99	16	14,2	cyclictest	2075723	-21	kworker/u16:3+flush-8:0	10:39:26	6
1632163	99	16	14,2	cyclictest	2224890	-21	kworker/u16:0+flush-8:0	11:34:56	4
1632163	99	16	14,2	cyclictest	2126917	-21	kworker/u16:2+flush-8:0	11:05:24	4
1632163	99	16	14,2	cyclictest	1868840	-21	kworker/u16:4+events_unbound	09:24:43	4
1632163	99	16	14,2	cyclictest	1656940	-21	kworker/u16:3+events_unbound	07:44:49	4
1632163	99	16	0,16	cyclictest	0	-21	swapper/4	10:18:33	4
1632163	99	16	0,16	cyclictest	0	-21	swapper/4	10:18:33	4
1632172	99	15	14,0	cyclictest	0	-21	swapper/7	08:42:38	7
1632172	99	15	13,1	cyclictest	2160858	-21	ssh	11:04:52	7
1632172	99	15	13,1	cyclictest	1869169	-21	diskmemload	12:06:32	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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