OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Thu Aug 13, 2026 12:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
93972	2	218	0,2	sleep3	575	-21	kworker/3:2+events	11:57:53	3
4055564	2	75	0,3	chrt	575	-21	kworker/3:2-events	08:02:51	3
3999895	99	61	54,5	cyclictest	115620	-21	apt-get	12:20:00	1
4124243	2	57	0,4	chrt	0	-21	swapper/1	09:12:51	1
3999892	99	54	48,4	cyclictest	4150542	-21	base64	09:40:01	0
4161341	2	51	0,2	chrt	575	-21	kworker/3:2+events	09:52:45	3
3999892	99	46	37,6	cyclictest	80754	-21	latency_hist	11:45:01	0
3999895	99	45	40,3	cyclictest	4026788	-21	kworker/u8:2+events_unbound	08:27:45	1
3999895	99	44	39,4	cyclictest	3182930	-21	kworker/u8:4+events_unbound	07:15:02	1
3999895	99	44	37,5	cyclictest	3182930	-21	kworker/u8:4+flush-8:0	08:38:01	1
3999895	99	44	37,5	cyclictest	131123	-21	apt-get	12:37:40	1
3999895	99	44	36,6	cyclictest	4026788	-21	kworker/u8:2+flush-8:0	08:52:54	1
3999895	99	43	38,3	cyclictest	41288	-21	kworker/u8:2+events_unbound	11:22:46	1
3999895	99	43	38,3	cyclictest	4026788	-21	kworker/u8:2+flush-8:0	07:52:51	1
3999895	99	43	38,3	cyclictest	3182930	-21	kworker/u8:4+events_unbound	08:57:53	1
3999895	99	43	37,4	cyclictest	4026788	-21	kworker/u8:2+flush-8:0	08:22:56	1
3999895	99	43	35,7	cyclictest	4026788	-21	kworker/u8:2+flush-8:0	07:36:50	1
3999895	99	43	35,6	cyclictest	4004760	-21	latency_hist	07:15:01	1
3999895	99	42	35,5	cyclictest	3967825	-21	kworker/u8:1+flush-8:0	08:32:54	1
3999892	99	42	36,4	cyclictest	4175667	-21	kworker/u8:0+flush-8:0	10:47:50	0
3999895	99	41	37,3	cyclictest	4175667	-21	kworker/u8:0+events_unbound	11:02:54	1
3999895	99	41	35,5	cyclictest	3182930	-21	kworker/u8:4+flush-8:0	07:57:59	1
3999895	99	41	35,4	cyclictest	4180662	-21	kworker/u8:3+events_unbound	10:42:53	1
3999895	99	41	35,4	cyclictest	3182930	-21	kworker/u8:4+flush-8:0	09:23:02	1
3999895	99	41	35,4	cyclictest	3182930	-21	kworker/u8:4+flush-8:0	09:17:59	1
3999892	99	41	34,5	cyclictest	3182930	-21	kworker/u8:4+flush-8:0	08:37:47	0
3999892	99	41	33,5	cyclictest	65878	-21	latency_hist	11:30:01	0
105184	2	41	0,4	sleep1	0	-21	swapper/1	12:08:02	1
3999895	99	40	33,5	cyclictest	4165776	-21	kworker/u8:2+flush-8:0	10:27:56	1
3999895	99	40	29,3	cyclictest	3182930	-21	kworker/u8:4+flush-8:0	09:47:49	1
3999892	99	40	35,4	cyclictest	4026788	-21	kworker/u8:2+flush-8:0	08:12:57	0
3999892	99	40	32,6	cyclictest	105492	-21	latency_hist	12:10:01	0
3999892	99	40	30,7	cyclictest	75772	-21	latency_hist	11:40:01	0
3999897	99	39	31,6	cyclictest	275	-21	systemd-journal	07:30:00	2
3999895	99	39	35,3	cyclictest	4106189	-21	kworker/u8:0+events_unbound	09:07:46	1
3999895	99	39	34,3	cyclictest	95803	-21	kworker/u8:3+events_unbound	12:05:01	1
3999895	99	38	34,3	cyclictest	4125933	-21	kworker/u8:1+flush-8:0	09:32:59	1
3999895	99	38	33,4	cyclictest	3182930	-21	kworker/u8:4+flush-8:0	08:17:46	1
3999895	99	38	31,5	cyclictest	3967825	-21	kworker/u8:1+flush-8:0	08:07:56	1
3999892	99	38	34,3	cyclictest	4165776	-21	kworker/u8:2+flush-8:0	10:02:49	0
3999892	99	38	34,3	cyclictest	3967825	-21	kworker/u8:1+events_unbound	08:07:45	0
3999895	99	37	33,3	cyclictest	4140796	-21	kworker/u8:0+flush-8:0	09:42:51	1
3999895	99	37	32,3	cyclictest	86384	-21	diskstats	11:52:44	1
3999895	99	37	31,4	cyclictest	4106189	-21	kworker/u8:0+events_unbound	09:02:56	1
3999895	99	36	32,3	cyclictest	41288	-21	kworker/u8:2+events_unbound	11:42:43	1
3999895	99	36	30,4	cyclictest	4016666	-21	kworker/u8:0+flush-8:0	07:28:01	1
3999895	99	36	29,5	cyclictest	41288	-21	kworker/u8:2+flush-8:0	11:29:25	1
3999892	99	36	27,6	cyclictest	85686	-21	latency_hist	11:50:01	0
3999895	99	35	31,3	cyclictest	41288	-21	kworker/u8:2+events_unbound	11:37:48	1
3999895	99	35	31,3	cyclictest	4026788	-21	kworker/u8:2+events_unbound	07:47:50	1
3999892	99	35	29,5	cyclictest	3182930	-21	kworker/u8:4+flush-8:0	09:17:58	0
3999895	99	34	30,2	cyclictest	4166709	-21	irqrtprio	09:57:48	1
3999895	99	34	29,4	cyclictest	4180662	-21	kworker/u8:3+events_unbound	10:17:46	1
3999895	99	34	29,3	cyclictest	124926	-21	needreboot	12:27:53	1
3999895	99	34	26,6	cyclictest	26639	-21	/usr/sbin/munin	10:53:00	1
3999895	99	34	25,7	cyclictest	70107	-21	ntpq	11:32:55	1
3999895	99	34	22,9	cyclictest	36077	-21	turbostat.cron	11:00:00	1
3999895	99	34	22,9	cyclictest	36077	-21	turbostat.cron	11:00:00	1
3999892	99	34	30,3	cyclictest	3967825	-21	kworker/u8:1+events_unbound	07:35:00	0
3999892	99	34	25,7	cyclictest	4135601	-21	latency_hist	09:25:00	0
3999892	99	34	25,7	cyclictest	275	-21	systemd-journal	10:00:00	0
3999895	99	33	29,3	cyclictest	4016666	-21	kworker/u8:0+flush-8:0	07:32:48	1
3999895	99	33	28,3	cyclictest	3182930	-21	kworker/u8:4+flush-8:0	07:22:45	1
3999895	99	33	27,5	cyclictest	61155	-21	kworker/u8:0+flush-8:0	12:12:56	1
3999895	99	33	27,4	cyclictest	3967825	-21	kworker/u8:1+flush-8:0	08:42:54	1
3999892	99	33	28,4	cyclictest	3182930	-21	kworker/u8:4+flush-8:0	09:48:03	0
3999892	99	33	27,5	cyclictest	61155	-21	kworker/u8:0+flush-8:0	12:22:51	0
4006024	2	32	0,4	sleep3	575	-21	kworker/3:2-events	07:15:04	3
3999895	99	32	27,4	cyclictest	4165776	-21	kworker/u8:2+events_unbound	10:32:55	1
3999895	99	32	26,5	cyclictest	4026788	-21	kworker/u8:2+events_unbound	09:27:58	1
3999895	99	32	26,5	cyclictest	4026788	-21	kworker/u8:2+events_unbound	09:27:58	1
3999892	99	32	26,4	cyclictest	45763	-21	unixbench_multi	11:08:02	0
3999895	99	31	26,4	cyclictest	36120	-21	kworker/u8:1+events_unbound	11:12:42	1
3999895	99	31	25,4	cyclictest	3182930	-21	kworker/u8:4+events_unbound	09:52:45	1
3999895	99	31	25,4	cyclictest	1	-21	systemd	11:50:00	1
3999892	99	31	27,2	cyclictest	6397	-21	cut	10:30:01	0
3999892	99	31	26,4	cyclictest	41288	-21	kworker/u8:2+flush-8:0	11:12:45	0
3999892	99	31	26,4	cyclictest	110436	-21	kworker/u8:1+flush-8:0	12:29:50	0
3999892	99	31	25,4	cyclictest	61155	-21	kworker/u8:0+flush-8:0	12:00:00	0
3999892	99	31	15,6	cyclictest	0	-21	swapper/0	12:37:58	0
3999604	2	31	4,10	sleep2	0	-21	swapper/2	07:08:50	2
3999895	99	30	25,4	cyclictest	41288	-21	kworker/u8:2+events_unbound	11:07:53	1
3999895	99	30	24,4	cyclictest	36120	-21	kworker/u8:1+flush-8:0	11:18:01	1
3999895	99	30	23,5	cyclictest	61155	-21	kworker/u8:0+flush-8:0	12:32:51	1
3999895	99	30	23,5	cyclictest	275	-21	systemd-journal	10:12:19	1
3999895	99	30	22,6	cyclictest	4052046	-21	apt-get	08:02:40	1
3999892	99	30	25,3	cyclictest	3182930	-21	kworker/u8:4+flush-8:0	09:07:50	0
3999892	99	30	24,4	cyclictest	4140796	-21	kworker/u8:0+flush-8:0	09:43:01	0
3999892	99	30	23,6	cyclictest	3182930	-21	kworker/u8:4+flush-8:0	08:02:45	0
3999892	99	30	21,6	cyclictest	275	-21	systemd-journal	11:20:01	0
3999897	99	29	25,2	cyclictest	60587	-21	unixbench_multi	11:23:02	2
3999897	99	29	25,2	cyclictest	4036279	-21	unixbench_multi	07:43:02	2
3999897	99	29	25,2	cyclictest	4036279	-21	unixbench_multi	07:43:02	2
3999897	99	29	24,3	cyclictest	4097425	-21	kthreadcore	08:47:49	2
3999897	99	29	20,7	cyclictest	275	-21	systemd-journal	10:15:00	2
3999895	99	29	23,4	cyclictest	4175880	-21	apt-get	10:07:41	1
3999895	99	29	22,5	cyclictest	61155	-21	kworker/u8:0+flush-8:0	11:57:55	1
3999892	99	29	19,8	cyclictest	4045864	-21	ntpq	07:52:54	0
3999892	99	29	19,7	cyclictest	4016647	-21	latency_hist	07:25:01	0
3999892	99	29	0,26	cyclictest	3985054	-21	kworker/0:0+events	08:52:54	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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