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 376 highest latencies:

System rack2slot7s.osadl.org (updated Tue Jan 27, 2026 07:55:23)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3674721	99	80	67,8	cyclictest	304457	-21	multi.sh	06:10:21	0
3674721	99	80	67,8	cyclictest	304457	-21	multi.sh	06:10:21	0
3674721	99	68	30,32	cyclictest	3991269	-21	execl	05:50:10	0
3674723	99	62	53,5	cyclictest	303302	-21	rm	06:10:17	2
3674723	99	62	53,5	cyclictest	303302	-21	rm	06:10:17	2
3674723	99	61	51,6	cyclictest	233557	-21	multi.sh	06:07:28	2
3674723	99	61	51,6	cyclictest	233557	-21	multi.sh	06:07:28	2
3674722	99	61	48,9	cyclictest	304382	-21	od	06:10:20	1
3674722	99	61	48,9	cyclictest	304382	-21	od	06:10:20	1
3674722	99	60	35,21	cyclictest	298808	-21	multi.sh	06:10:04	1
3674722	99	60	35,21	cyclictest	298808	-21	multi.sh	06:10:04	1
3674721	99	60	32,21	cyclictest	0	-21	swapper/0	05:40:05	0
3674721	99	54	46,6	cyclictest	270606	-21	sh	06:08:57	0
3674721	99	54	46,6	cyclictest	270606	-21	sh	06:08:57	0
3674722	99	53	45,5	cyclictest	3942766	-21	sh	05:41:38	1
3674723	99	51	42,5	cyclictest	3990440	-21	execl	05:50:04	2
3674723	99	50	40,7	cyclictest	3910342	-21	sh	05:40:11	2
3674722	99	50	27,19	cyclictest	3908401	-21	kworker/u8:4	05:40:01	1
3674722	99	49	34,11	cyclictest	374042	-21	munin-plugin-st	06:25:01	1
3674722	99	49	23,22	cyclictest	0	-21	swapper/1	06:30:00	1
3674722	99	49	23,22	cyclictest	0	-21	swapper/1	06:30:00	1
3674722	99	48	21,23	cyclictest	3680326	-21	unixbench_multi	05:20:19	1
3674723	99	47	39,5	cyclictest	3676265	-21	cron	05:10:01	2
3674722	99	47	26,18	cyclictest	0	-21	swapper/1	06:35:00	1
3674722	99	47	21,3	cyclictest	0	-21	swapper/1	05:50:17	1
3674722	99	46	40,3	cyclictest	3669412	-21	kworker/u8:7-xprtiod	05:50:01	1
3674722	99	46	18,6	cyclictest	4132308	-21	spawn	06:03:23	1
3674722	99	44	11,9	cyclictest	3871543	-21	awk	05:35:01	1
3674721	99	44	32,10	cyclictest	3990443	-21	execl	05:50:02	0
3674723	99	43	34,5	cyclictest	372814	-21	idleruntime-cro	06:20:00	2
3674721	99	42	35,5	cyclictest	375702	-21	if_wlan0	06:30:01	0
3674721	99	42	35,5	cyclictest	375702	-21	if_wlan0	06:30:01	0
3674721	99	42	34,5	cyclictest	1168	-21	mta-sts-daemon	05:05:05	0
3674721	99	42	32,7	cyclictest	3995342	-21	context1	06:01:02	0
3674723	99	41	31,6	cyclictest	3556317	-21	cups-browsed	06:35:02	2
3674721	99	41	35,3	cyclictest	3908328	-21	grep	05:40:01	0
3674721	99	41	34,4	cyclictest	3679376	-21	latency_hist	05:20:01	0
3674723	99	40	29,8	cyclictest	4136557	-21	spawn	06:03:24	2
3674722	99	40	31,5	cyclictest	3678914	-21	whetstone-doubl	05:20:02	1
3674723	99	39	31,5	cyclictest	375643	-21	systemd-run	06:30:00	2
3674723	99	39	31,5	cyclictest	375643	-21	systemd-run	06:30:00	2
3674723	99	39	31,5	cyclictest	3677473	-21	pwd	05:15:01	2
3674723	99	39	29,7	cyclictest	3679269	-21	cron	05:20:00	2
3674723	99	39	28,8	cyclictest	3871662	-21	latency	05:35:02	2
3674723	99	38	30,5	cyclictest	3991266	-21	execl	05:50:16	2
3674721	99	38	33,2	cyclictest	0	-21	swapper/0	06:40:02	0
3674723	99	37	28,5	cyclictest	3993684	-21	Run	05:59:07	2
3674723	99	37	28,5	cyclictest	3993684	-21	Run	05:59:07	2
3674722	99	37	2,30	cyclictest	3676476	-21	sed	05:10:02	1
3674722	99	36	30,3	cyclictest	0	-21	swapper/1	05:15:02	1
3674722	99	36	28,5	cyclictest	378678	-21	idleruntime-cro	06:40:00	1
3674722	99	36	28,5	cyclictest	3682548	-21	kernelversion	05:30:01	1
3674723	99	35	23,6	cyclictest	1166	-21	mta-sts-daemon	06:35:05	2
3674722	99	35	27,5	cyclictest	0	-21	swapper/1	06:20:00	1
3674721	99	35	2,27	cyclictest	3993136	-21	fstime	05:55:59	0
3674721	99	35	2,27	cyclictest	3993136	-21	fstime	05:55:59	0
3674723	99	34	5,20	cyclictest	1167	-21	mta-sts-daemon	05:20:08	2
3674721	99	34	29,2	cyclictest	3556310	-21	cupsd	05:10:06	0
3674721	99	34	27,5	cyclictest	15	1	ktimers/0	05:25:09	0
3674721	99	34	26,5	cyclictest	15	1	ktimers/0	06:20:03	0
3674723	99	33	26,4	cyclictest	3872598	-21	grep	05:35:19	2
3674722	99	31	25,3	cyclictest	0	-21	swapper/1	05:05:01	1
3674721	99	31	15,3	cyclictest	17	1	rcu_preempt	06:30:11	0
3674721	99	31	12,6	cyclictest	14	-21	ksoftirqd/0	05:35:01	0
3674722	99	30	21,4	cyclictest	0	-21	swapper/1	05:55:07	1
3674722	99	30	21,4	cyclictest	0	-21	swapper/1	05:55:07	1
3674721	99	30	23,5	cyclictest	3674731	-21	missed_timers	05:05:01	0
3674721	99	30	19,7	cyclictest	15	1	ktimers/0	06:15:11	0
3674721	99	30	0,11	cyclictest	3679870	-21	ntpq	05:20:10	0
3674723	99	29	19,8	cyclictest	373871	-21	aten_r2power_fr	06:24:57	2
3674723	99	25	18,5	cyclictest	3682185	-21	aten2.4-expect	05:29:56	2
3674723	99	25	18,5	cyclictest	0	-21	swapper/2	05:05:02	2
3674724	99	19	2,8	cyclictest	0	-21	swapper/3	05:45:09	3
3674724	99	18	2,10	cyclictest	0	-21	swapper/3	06:10:16	3
3674724	99	18	2,10	cyclictest	0	-21	swapper/3	06:10:16	3
3674724	99	18	1,10	cyclictest	0	-21	swapper/3	06:00:07	3
3674724	99	17	1,10	cyclictest	0	-21	swapper/3	06:05:05	3
3674724	99	17	1,10	cyclictest	0	-21	swapper/3	06:05:05	3
3674724	99	17	1,10	cyclictest	0	-21	swapper/3	05:50:17	3
3674724	99	16	1,9	cyclictest	0	-21	swapper/3	05:40:03	3
3674724	99	15	3,7	cyclictest	0	-21	swapper/3	05:56:13	3
3674724	99	15	3,7	cyclictest	0	-21	swapper/3	05:56:13	3
3674724	99	15	2,8	cyclictest	0	-21	swapper/3	05:15:16	3
3674724	99	15	1,6	cyclictest	0	-21	swapper/3	06:20:05	3
3674724	99	15	1,10	cyclictest	0	-21	swapper/3	05:40:10	3
3674724	99	14	1,6	cyclictest	0	-21	swapper/3	06:25:23	3
3674724	99	14	1,6	cyclictest	0	-21	swapper/3	06:25:23	3
3674724	99	14	1,6	cyclictest	0	-21	swapper/3	05:05:08	3
3674724	99	13	3,7	cyclictest	0	-21	swapper/3	05:15:01	3
3674724	99	12	3,5	cyclictest	0	-21	swapper/3	06:20:00	3
3674724	99	12	1,6	cyclictest	0	-21	swapper/3	06:40:01	3
3674724	99	12	1,6	cyclictest	0	-21	swapper/3	05:25:05	3
3674724	99	11	2,5	cyclictest	0	-21	swapper/3	06:35:01	3
3674724	99	11	1,7	cyclictest	0	-21	swapper/3	05:34:59	3
3674724	99	11	1,6	cyclictest	0	-21	swapper/3	05:20:08	3
3674724	99	11	1,6	cyclictest	0	-21	swapper/3	05:05:02	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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