OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #9, 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 rack9slot2.osadl.org (updated Sun May 17, 2026 00:43:24)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
32364	2	297	203,73	sleep1	0	-21	swapper/1		1
731	2	270	207,51	sleep2	0	-21	swapper/2		2
31898	2	269	193,15	sleep0	0	-21	swapper/0		0
999	99	245	240,3	cyclictest	5657	-21	sendmail		3
804	2	245	179,24	sleep3	0	-21	swapper/3		3
995	99	228	222,3	cyclictest	5660	-21	perf		2
991	99	138	132,4	cyclictest	5633	-21	munin-run		1
988	99	106	102,3	cyclictest	512	-21	dbus-daemon		0
17833	2	68	0,3	sleep2	27	1	rcuc/2		2
5573	2	59	0,2	sleep1	991	99	cyclictest		1
24925	2	51	0,2	sleep3	0	-21	swapper/3		3
11194	2	39	0,1	sleep3	0	-21	swapper/3		3
995	99	38	27,3	cyclictest	28	-21	ksoftirqd/2		2
10702	2	38	0,3	sleep0	0	-21	swapper/0		0
999	99	34	3,10	cyclictest	24714	-21	sed		3
8420	2	32	0,2	sleep1	0	-21	swapper/1		1
999	99	30	3,6	cyclictest	8512	-21	cat		3
999	99	30	3,6	cyclictest	8512	-21	cat		3
999	99	30	3,6	cyclictest	7729	-21	latency_hist		3
24991	2	30	0,4	sleep1	991	99	cyclictest		1
995	99	29	11,9	cyclictest	28	-21	ksoftirqd/2		2
18210	2	29	0,1	sleep1	0	-21	swapper/1		1
999	99	28	3,8	cyclictest	1903	-21	grep		3
999	99	28	1,9	cyclictest	14851	-21	sort		3
995	99	28	17,3	cyclictest	28	-21	ksoftirqd/2		2
995	99	28	17,3	cyclictest	28	-21	ksoftirqd/2		2
999	99	27	4,8	cyclictest	6615	-21	sed		3
999	99	27	21,4	cyclictest	28237	-21	turbostat.cron		3
995	99	27	8,5	cyclictest	28	-21	ksoftirqd/2		2
995	99	27	16,3	cyclictest	28	-21	ksoftirqd/2		2
995	99	27	16,2	cyclictest	11	1	rcu_preempt		2
995	99	27	13,12	cyclictest	28	-21	ksoftirqd/2		2
999	99	26	6,6	cyclictest	35	-21	ksoftirqd/3		3
999	99	26	3,8	cyclictest	30469	-21	chrt		3
999	99	26	2,10	cyclictest	325	-21	systemd-journal		3
995	99	26	17,2	cyclictest	11	1	rcu_preempt		2
995	99	26	14,3	cyclictest	28	-21	ksoftirqd/2		2
995	99	26	14,3	cyclictest	11	1	rcu_preempt		2
995	99	26	11,4	cyclictest	28	-21	ksoftirqd/2		2
24317	2	26	0,2	sleep3	0	-21	swapper/3		3
999	99	25	3,7	cyclictest	4882	-21	unixbench_multi		3
999	99	25	2,8	cyclictest	325	-21	systemd-journal		3
999	99	25	2,6	cyclictest	34	1	rcuc/3		3
999	99	25	2,5	cyclictest	0	-21	swapper/3		3
999	99	25	0,8	cyclictest	21750	-21	sed		3
999	99	25	0,8	cyclictest	21750	-21	sed		3
999	99	25	0,15	cyclictest	35	-21	ksoftirqd/3		3
999	99	25	0,14	cyclictest	35	-21	ksoftirqd/3		3
999	99	25	0,10	cyclictest	2364	-21	aten2.4-expect		3
995	99	25	5,7	cyclictest	28	-21	ksoftirqd/2		2
995	99	25	16,3	cyclictest	11	1	rcu_preempt		2
995	99	25	15,2	cyclictest	11	1	rcu_preempt		2
995	99	25	14,2	cyclictest	28	-21	ksoftirqd/2		2
999	99	24	2,7	cyclictest	13303	-21	chrt		3
999	99	24	0,15	cyclictest	35	-21	ksoftirqd/3		3
999	99	24	0,14	cyclictest	35	-21	ksoftirqd/3		3
999	99	24	0,14	cyclictest	35	-21	ksoftirqd/3		3
995	99	24	19,3	cyclictest	28	-21	ksoftirqd/2		2
995	99	24	15,2	cyclictest	11	1	rcu_preempt		2
995	99	24	13,3	cyclictest	28	-21	ksoftirqd/2		2
995	99	24	12,4	cyclictest	28	-21	ksoftirqd/2		2
995	99	24	12,4	cyclictest	28	-21	ksoftirqd/2		2
995	99	24	11,4	cyclictest	28	-21	ksoftirqd/2		2
999	99	23	3,7	cyclictest	35	-21	ksoftirqd/3		3
999	99	23	3,6	cyclictest	21948	-21	chrt		3
999	99	23	2,6	cyclictest	35	-21	ksoftirqd/3		3
999	99	23	2,6	cyclictest	30283	-21	chrt		3
999	99	23	2,5	cyclictest	35	-21	ksoftirqd/3		3
999	99	23	15,5	cyclictest	15570	-21	grep		3
999	99	23	0,6	cyclictest	35	-21	ksoftirqd/3		3
999	99	23	0,14	cyclictest	35	-21	ksoftirqd/3		3
999	99	23	0,14	cyclictest	35	-21	ksoftirqd/3		3
995	99	23	15,2	cyclictest	11	1	rcu_preempt		2
995	99	23	12,3	cyclictest	28	-21	ksoftirqd/2		2
995	99	23	12,3	cyclictest	28	-21	ksoftirqd/2		2
995	99	23	12,3	cyclictest	28	-21	ksoftirqd/2		2
995	99	23	12,3	cyclictest	28	-21	ksoftirqd/2		2
995	99	23	11,3	cyclictest	28	-21	ksoftirqd/2		2
995	99	23	10,3	cyclictest	28	-21	ksoftirqd/2		2
995	99	23	0,8	cyclictest	28	-21	ksoftirqd/2		2
999	99	22	3,6	cyclictest	35	-21	ksoftirqd/3		3
999	99	22	3,6	cyclictest	34	1	rcuc/3		3
999	99	22	2,6	cyclictest	35	-21	ksoftirqd/3		3
999	99	22	2,6	cyclictest	11298	-21	runrttasks		3
999	99	22	2,5	cyclictest	18018	-21	taskset		3
999	99	22	0,9	cyclictest	11476	-21	chrt		3
999	99	22	0,8	cyclictest	9710	-21	chrt		3
999	99	22	0,8	cyclictest	35	-21	ksoftirqd/3		3
999	99	22	0,8	cyclictest	35	-21	ksoftirqd/3		3
999	99	22	0,6	cyclictest	35	-21	ksoftirqd/3		3
995	99	22	9,2	cyclictest	11	1	rcu_preempt		2
995	99	22	6,7	cyclictest	28	-21	ksoftirqd/2		2
995	99	22	4,4	cyclictest	0	-21	swapper/2		2
995	99	22	3,8	cyclictest	28	-21	ksoftirqd/2		2
995	99	22	14,2	cyclictest	11	1	rcu_preempt		2
995	99	22	13,2	cyclictest	11	1	rcu_preempt		2
995	99	22	13,2	cyclictest	11	1	rcu_preempt		2
995	99	22	12,3	cyclictest	28	-21	ksoftirqd/2		2
995	99	22	1,18	cyclictest	2643	-21	gpgconf		2
995	99	22	11,3	cyclictest	28	-21	ksoftirqd/2		2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-04-10 - 20:27