OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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.
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 rack2slot7s.osadl.org (updated Thu Feb 19, 2026 07:55:10)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3982075	99	87	71,12	cyclictest	593027	-21	multi.sh	06:10:24	0
3982075	99	87	71,12	cyclictest	593027	-21	multi.sh	06:10:24	0
3982075	99	57	13,38	cyclictest	125	50	irq/33-eth0	06:35:09	0
3982077	99	56	47,6	cyclictest	593894	-21	sh	06:10:27	2
3982077	99	56	47,6	cyclictest	593894	-21	sh	06:10:27	2
3982076	99	53	45,5	cyclictest	582034	-21	sort	06:09:58	1
3982076	99	53	42,7	cyclictest	594267	-21	sh	06:10:28	1
3982076	99	53	42,7	cyclictest	594267	-21	sh	06:10:28	1
3982076	99	52	43,6	cyclictest	95135	-21	Run	05:46:35	1
3982077	99	51	34,3	cyclictest	17	1	rcu_preempt	05:41:24	2
3982075	99	50	39,6	cyclictest	3982939	-21	sshd	05:05:15	0
3982077	99	46	38,5	cyclictest	536088	-21	sh	06:08:08	2
3982077	99	45	35,8	cyclictest	3985051	-21	cut	05:15:01	2
3982076	99	44	36,5	cyclictest	86777	-21	sh	05:43:18	1
3982076	99	43	30,10	cyclictest	98589	-21	pipe	05:59:47	1
3982075	99	43	31,10	cyclictest	41108	-21	sh	05:41:17	0
3982076	99	42	33,6	cyclictest	0	-21	swapper/1	05:50:19	1
3982076	99	41	29,9	cyclictest	3864247	-21	cups-browsed	05:05:02	1
3982075	99	41	31,7	cyclictest	583666	-21	multi.sh	06:10:02	0
3982077	99	40	32,5	cyclictest	96128	-21	cut	05:50:15	2
3982076	99	40	32,5	cyclictest	4188227	-21	sh	05:38:02	1
3982076	99	40	32,5	cyclictest	231836	-21	spawn	06:03:55	1
3982075	99	40	28,10	cyclictest	3973525	-21	kworker/u8:12+xprtiod	05:50:19	0
3982077	99	39	31,5	cyclictest	3606321	-21	systemd-journal	06:40:01	2
3982075	99	39	31,6	cyclictest	661864	-21	latency_hist	06:30:01	0
3982075	99	39	31,6	cyclictest	661864	-21	latency_hist	06:30:01	0
3982076	99	38	30,5	cyclictest	1	-21	systemd	06:40:05	1
3982075	99	38	28,7	cyclictest	97832	-21	fstime	05:56:03	0
3982077	99	37	29,6	cyclictest	231809	-21	spawn	06:03:24	2
3982077	99	37	29,5	cyclictest	4178305	-21	latency_hist	05:35:03	2
3982077	99	37	27,7	cyclictest	3983562	-21	sh	05:10:02	2
3982077	99	36	28,4	cyclictest	3973525	-21	kworker/u8:12-xprtiod	05:45:22	2
3982076	99	36	26,7	cyclictest	812	-21	cron	06:20:00	1
3982076	99	36	26,7	cyclictest	812	-21	cron	06:20:00	1
3982075	99	36	27,6	cyclictest	318291	-21	spawn	06:03:46	0
3982077	99	35	30,2	cyclictest	0	-21	swapper/2	06:25:01	2
3982077	99	35	30,2	cyclictest	0	-21	swapper/2	06:25:01	2
3982077	99	34	25,4	cyclictest	0	-21	swapper/2	05:55:18	2
3982077	99	33	25,5	cyclictest	663240	-21	cron	06:35:00	2
3982077	99	33	25,5	cyclictest	3987317	-21	fschecks_count	05:20:11	2
3982076	99	33	22,5	cyclictest	0	-21	swapper/1	06:25:18	1
3982076	99	33	22,5	cyclictest	0	-21	swapper/1	06:25:18	1
3982076	99	33	1,25	cyclictest	3982935	-21	sshd	05:05:15	1
3982075	99	33	24,6	cyclictest	95300	-21	execl	05:50:03	0
3982077	99	32	25,4	cyclictest	4182159	-21	multi.sh	05:37:30	2
3982075	99	32	24,4	cyclictest	0	-21	swapper/0	06:15:17	0
3982075	99	32	24,4	cyclictest	0	-21	swapper/0	06:15:17	0
3982075	99	32	21,4	cyclictest	2908	-21	sh	05:38:49	0
3982075	99	32	1,26	cyclictest	3987443	-21	execl	05:20:21	0
3982076	99	31	23,5	cyclictest	3989810	-21	unixbench_singl	05:25:30	1
3982076	99	31	1,25	cyclictest	3990462	-21	pipe	05:30:17	1
3982075	99	31	22,7	cyclictest	3982028	-21	munin-plugin-st	05:05:02	0
3982076	99	30	24,3	cyclictest	0	-21	swapper/1	05:20:17	1
3982075	99	30	22,5	cyclictest	3864247	-21	cups-browsed	05:30:08	0
3982077	99	28	20,5	cyclictest	1166	-21	mta-sts-daemon	06:15:09	2
3982077	99	28	20,5	cyclictest	1166	-21	mta-sts-daemon	06:15:09	2
3982077	99	28	19,5	cyclictest	3989933	-21	pipe	05:30:01	2
3982076	99	28	21,3	cyclictest	0	-21	swapper/1	06:35:00	1
3982076	99	28	20,5	cyclictest	660254	-21	awk	06:25:00	1
3982076	99	28	20,5	cyclictest	660254	-21	awk	06:25:00	1
3982075	99	28	1,22	cyclictest	662775	-21	ps	06:30:24	0
3982077	99	27	19,5	cyclictest	661645	-21	unixbench_multi	06:25:29	2
3982077	99	27	19,5	cyclictest	661645	-21	unixbench_multi	06:25:29	2
3982076	99	27	21,3	cyclictest	0	-21	swapper/1	05:20:01	1
3982075	99	27	19,6	cyclictest	3985118	-21	systemctl	05:15:01	0
3982077	99	26	18,5	cyclictest	3986539	-21	unixbench_singl	05:15:29	2
3982075	99	25	18,5	cyclictest	1168	-21	mta-sts-daemon	06:23:53	0
3982075	99	25	18,5	cyclictest	1168	-21	mta-sts-daemon	06:23:53	0
3982076	99	24	18,3	cyclictest	1166	-21	mta-sts-daemon	05:10:19	1
3982075	99	24	20,2	cyclictest	0	-21	swapper/0	05:20:01	0
3982075	99	24	12,3	cyclictest	0	-21	swapper/0	05:25:30	0
3982077	99	20	12,5	cyclictest	3973525	-21	kworker/u8:12+xprtiod	05:05:01	2
3982078	99	18	2,8	cyclictest	0	-21	swapper/3	06:00:18	3
3982078	99	18	2,5	cyclictest	0	-21	swapper/3	06:20:16	3
3982078	99	18	2,5	cyclictest	0	-21	swapper/3	06:20:16	3
3982078	99	16	2,7	cyclictest	0	-21	swapper/3	05:50:16	3
3982078	99	16	2,7	cyclictest	0	-21	swapper/3	05:30:16	3
3982078	99	16	1,7	cyclictest	0	-21	swapper/3	06:35:09	3
3982078	99	14	2,4	cyclictest	0	-21	swapper/3	05:35:24	3
3982078	99	14	1,6	cyclictest	0	-21	swapper/3	05:45:21	3
3982078	99	14	1,6	cyclictest	0	-21	swapper/3	05:25:18	3
3982078	99	14	1,6	cyclictest	0	-21	swapper/3	05:15:16	3
3982078	99	13	3,6	cyclictest	0	-21	swapper/3	05:57:05	3
3982078	99	13	2,6	cyclictest	0	-21	swapper/3	06:05:23	3
3982078	99	13	2,6	cyclictest	0	-21	swapper/3	05:40:21	3
3982078	99	13	2,5	cyclictest	0	-21	swapper/3	06:15:20	3
3982078	99	13	2,5	cyclictest	0	-21	swapper/3	06:15:20	3
3982078	99	13	1,5	cyclictest	0	-21	swapper/3	05:05:13	3
3982078	99	12	1,7	cyclictest	0	-21	swapper/3	06:30:16	3
3982078	99	12	1,6	cyclictest	0	-21	swapper/3	06:10:08	3
3982078	99	12	1,6	cyclictest	0	-21	swapper/3	06:10:08	3
3982078	99	11	1,5	cyclictest	0	-21	swapper/3	05:20:15	3
3982078	99	10	2,4	cyclictest	0	-21	swapper/3	05:10:16	3
3982078	99	9	1,5	cyclictest	0	-21	swapper/3	06:25:17	3
3982078	99	9	1,5	cyclictest	0	-21	swapper/3	06:25:17	3
3982078	99	8	1,4	cyclictest	0	-21	swapper/3	05:05:03	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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