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
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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: performance
Compare latency of primary with shadow system

Characteristics of the 792 highest latencies:

System rack2slot7s.osadl.org (updated Thu Dec 18, 2025 07:55:46)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
725519	99	67	52,11	cyclictest	1034164	-21	fstime	05:55:10	0
725521	99	54	46,5	cyclictest	1529793	-21	sh	06:09:50	2
725519	99	53	47,4	cyclictest	1532946	-21	sh	06:09:57	0
725521	99	52	44,5	cyclictest	976684	-21	sh	05:41:16	2
725519	99	52	40,9	cyclictest	1564482	-21	sort	06:11:12	0
725520	99	49	42,4	cyclictest	1542553	-21	sh	06:10:19	1
725521	99	48	40,5	cyclictest	1566028	-21	sh	06:11:15	2
725520	99	48	42,3	cyclictest	0	-21	swapper/1	05:34:45	1
725520	99	48	42,3	cyclictest	0	-21	swapper/1	05:34:45	1
725520	99	48	40,5	cyclictest	1532433	-21	sh	06:09:56	1
725520	99	48	25,3	cyclictest	17	1	rcu_preempt	05:41:19	1
725519	99	48	32,11	cyclictest	858471	-21	spawn	05:34:48	0
725519	99	48	32,11	cyclictest	858471	-21	spawn	05:34:48	0
725521	99	46	38,5	cyclictest	1613367	-21	cron	06:25:00	2
725520	99	46	40,3	cyclictest	0	-21	swapper/1	05:50:01	1
725519	99	45	37,6	cyclictest	0	-21	swapper/0	05:39:41	0
725519	99	44	32,8	cyclictest	0	-21	swapper/0	05:49:40	0
725519	99	44	29,11	cyclictest	1037451	-21	Run	06:01:40	0
725519	99	43	35,5	cyclictest	1034140	-21	Run	05:53:37	0
725519	99	43	30,10	cyclictest	733452	-21	kworker/u8:9-xprtiod	05:42:27	0
725521	99	42	35,4	cyclictest	950611	-21	tee	05:40:02	2
725521	99	42	35,3	cyclictest	722907	-21	kworker/u8:7-rpciod	05:15:01	2
725519	99	42	31,8	cyclictest	1611903	-21	basename	06:20:00	0
725519	99	41	24,13	cyclictest	725657	-21	latency_hist	05:05:02	0
725521	99	40	35,2	cyclictest	0	-21	swapper/2	05:49:40	2
725521	99	39	30,6	cyclictest	731933	-21	kworker/u8:4-xprtiod	05:35:00	2
725521	99	39	30,6	cyclictest	731933	-21	kworker/u8:4-xprtiod	05:35:00	2
725521	99	39	30,6	cyclictest	1250895	-21	spawn	06:03:38	2
725520	99	39	30,4	cyclictest	0	-21	swapper/1	05:39:40	1
725519	99	39	33,4	cyclictest	1614752	-21	unixbench_multi	06:29:51	0
725519	99	39	30,7	cyclictest	724203	-21	kworker/u8:18-rpciod	05:28:12	0
725519	99	39	30,7	cyclictest	724203	-21	kworker/u8:18-rpciod	05:28:12	0
725521	99	38	29,6	cyclictest	1034080	-21	fstime	05:51:24	2
725520	99	38	29,6	cyclictest	724202	-21	kworker/u8:17-rpciod	06:30:01	1
725521	99	37	1,6	cyclictest	17	1	rcu_preempt	05:29:43	2
725521	99	37	1,6	cyclictest	17	1	rcu_preempt	05:29:43	2
725520	99	37	29,5	cyclictest	1616207	-21	tail	06:34:52	1
725520	99	37	29,5	cyclictest	1446822	-21	spawn	06:04:25	1
725519	99	37	29,6	cyclictest	15	1	ktimers/0	05:24:46	0
725519	99	37	28,6	cyclictest	674	-21	gdbus	06:39:46	0
725520	99	36	28,5	cyclictest	1035690	-21	fstime	05:57:50	1
725520	99	36	27,6	cyclictest	564	-21	dbus-daemon	05:25:01	1
725521	99	35	29,3	cyclictest	0	-21	swapper/2	05:57:50	2
725520	99	35	27,5	cyclictest	1611902	-21	awk	06:20:00	1
725520	99	35	26,5	cyclictest	1034039	-21	execl	05:50:08	1
725519	99	34	27,4	cyclictest	730115	-21	cron	05:20:01	0
725520	99	33	23,7	cyclictest	1617768	-21	/usr/sbin/munin	06:40:02	1
725520	99	33	22,7	cyclictest	564	-21	dbus-daemon	05:27:13	1
725520	99	33	22,7	cyclictest	564	-21	dbus-daemon	05:27:13	1
725521	99	32	26,3	cyclictest	0	-21	swapper/2	05:24:44	2
725521	99	32	24,5	cyclictest	1617665	-21	tail	06:39:51	2
725520	99	32	24,6	cyclictest	0	-21	swapper/1	05:15:01	1
725521	99	31	26,2	cyclictest	0	-21	swapper/2	05:20:01	2
725519	99	31	24,5	cyclictest	1615393	-21	fschecks_time	06:34:37	0
725521	99	30	21,6	cyclictest	1616212	-21	unixbench_multi	06:34:52	2
725521	99	29	20,5	cyclictest	1611904	-21	munin-run	06:20:00	2
725520	99	29	21,5	cyclictest	730291	-21	latency_hist	05:20:02	1
725520	99	29	21,5	cyclictest	0	-21	swapper/1	06:25:00	1
725519	99	28	22,4	cyclictest	728511	-21	latency_hist	05:15:01	0
725519	99	28	20,6	cyclictest	15	1	ktimers/0	05:09:44	0
725519	99	26	18,4	cyclictest	0	-21	swapper/0	06:24:45	0
725521	99	25	5,13	cyclictest	1168	-21	mta-sts-daemon	06:29:43	2
725520	99	25	20,2	cyclictest	0	-21	swapper/1	05:09:51	1
725521	99	23	15,5	cyclictest	726594	-21	systemctl	05:09:48	2
725521	99	21	15,3	cyclictest	0	-21	swapper/2	05:05:01	2
725520	99	20	3,11	cyclictest	725531	-21	unin-run	05:05:01	1
725522	99	19	1,6	cyclictest	0	-21	swapper/3	05:24:42	3
725522	99	18	1,9	cyclictest	0	-21	swapper/3	06:09:46	3
725522	99	18	1,7	cyclictest	0	-21	swapper/3	06:34:44	3
725522	99	18	1,10	cyclictest	0	-21	swapper/3	05:39:42	3
725522	99	17	2,8	cyclictest	0	-21	swapper/3	05:14:42	3
725522	99	17	2,10	cyclictest	0	-21	swapper/3	05:49:35	3
725522	99	17	1,9	cyclictest	0	-21	swapper/3	05:44:39	3
725522	99	17	1,10	cyclictest	0	-21	swapper/3	05:57:00	3
725522	99	17	1,10	cyclictest	0	-21	swapper/3	05:34:42	3
725522	99	17	1,10	cyclictest	0	-21	swapper/3	05:34:42	3
725522	99	16	3,7	cyclictest	0	-21	swapper/3	06:01:27	3
725522	99	16	2,8	cyclictest	0	-21	swapper/3	05:51:57	3
725522	99	16	1,9	cyclictest	0	-21	swapper/3	06:19:46	3
725522	99	15	3,7	cyclictest	0	-21	swapper/3	06:12:47	3
725522	99	14	2,7	cyclictest	0	-21	swapper/3	05:09:47	3
725522	99	14	2,6	cyclictest	0	-21	swapper/3	06:24:41	3
725522	99	13	1,8	cyclictest	0	-21	swapper/3	06:39:41	3
725522	99	13	1,8	cyclictest	0	-21	swapper/3	05:29:43	3
725522	99	13	1,8	cyclictest	0	-21	swapper/3	05:29:43	3
725522	99	13	1,3	cyclictest	0	-21	swapper/3	06:29:42	3
725522	99	11	2,5	cyclictest	0	-21	swapper/3	05:19:42	3
725522	99	8	1,5	cyclictest	0	-21	swapper/3	05:05:01	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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