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.

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 13, 2026 07:55:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3957070	99	68	58,5	cyclictest	72588	-21	modprobe	05:50:02	2
3957069	99	65	59,3	cyclictest	0	-21	swapper/1	06:10:02	1
3957069	99	65	59,3	cyclictest	0	-21	swapper/1	06:10:02	1
3957068	99	59	51,5	cyclictest	573620	-21	sort	06:10:04	0
3957068	99	59	51,5	cyclictest	573620	-21	sort	06:10:04	0
3957068	99	59	42,14	cyclictest	3964669	-21	pipe	05:30:01	0
3957069	99	57	47,6	cyclictest	3958530	-21	cron	05:10:01	1
3957070	99	55	45,6	cyclictest	590536	-21	sh	06:10:44	2
3957068	99	55	25,27	cyclictest	575406	-21	multi.sh	06:10:10	0
3957069	99	54	47,4	cyclictest	0	-21	swapper/1	05:40:00	1
3957069	99	54	47,4	cyclictest	0	-21	swapper/1	05:40:00	1
3957068	99	52	40,9	cyclictest	24235	-21	sh	05:41:39	0
3957069	99	51	33,11	cyclictest	4143930	-21	spawn	05:34:59	1
3957068	99	51	27,21	cyclictest	71901	-21	execl	05:50:01	0
3957069	99	50	41,5	cyclictest	42794	-21	multi.sh	05:42:23	1
3957070	99	49	40,6	cyclictest	568325	-21	od	06:09:47	2
3957070	99	49	40,6	cyclictest	568325	-21	od	06:09:47	2
3957070	99	49	37,4	cyclictest	0	-21	swapper/2	06:34:47	2
3957069	99	49	2,41	cyclictest	653246	-21	/usr/sbin/munin	06:34:48	1
3957070	99	48	38,6	cyclictest	23123	-21	sh	05:41:36	2
3957070	99	48	37,7	cyclictest	4184006	-21	sh	05:40:01	2
3957070	99	48	37,7	cyclictest	4184006	-21	sh	05:40:01	2
3957070	99	48	36,7	cyclictest	4091392	-21	spawn	05:35:02	2
3957069	99	48	40,5	cyclictest	574848	-21	tee	06:10:08	1
3957070	99	47	37,4	cyclictest	0	-21	swapper/2	06:25:02	2
3957068	99	46	22,21	cyclictest	4163593	-21	wc	05:38:23	0
3957068	99	46	22,21	cyclictest	4163593	-21	wc	05:38:23	0
3957070	99	45	3,35	cyclictest	3961698	-21	sendmail-msp	05:20:01	2
3957069	99	45	36,6	cyclictest	3960189	-21	latency_hist	05:15:02	1
3957068	99	45	1,38	cyclictest	650940	-21	ntpq	06:24:58	0
3957070	99	44	34,6	cyclictest	75851	-21	sendmail	06:00:00	2
3957069	99	44	39,2	cyclictest	0	-21	swapper/1	05:25:01	1
3957068	99	44	36,5	cyclictest	655814	-21	latency_hist	06:40:02	0
3957068	99	43	3,23	cyclictest	75119	-21	Run	05:59:44	0
3957068	99	42	19,20	cyclictest	0	-21	swapper/0	05:50:11	0
3957068	99	42	19,20	cyclictest	0	-21	swapper/0	05:50:11	0
3957069	99	41	33,5	cyclictest	71901	-21	execl	05:50:03	1
3957069	99	41	33,5	cyclictest	655623	-21	grep	06:40:01	1
3957069	99	41	30,7	cyclictest	207968	-21	spawn	06:03:19	1
3957069	99	41	30,7	cyclictest	207968	-21	spawn	06:03:19	1
3957068	99	41	1,35	cyclictest	487912	-21	ntpq	06:04:55	0
3957068	99	41	1,35	cyclictest	487912	-21	ntpq	06:04:55	0
3957068	99	41	1,32	cyclictest	653386	-21	aten_r2power_po	06:34:47	0
3957070	99	40	2,30	cyclictest	3958626	-21	latency_hist	05:10:02	2
3957069	99	40	27,9	cyclictest	74977	-21	fstime	05:56:58	1
3957068	99	40	30,8	cyclictest	3961714	-21	unin-run	05:20:02	0
3957069	99	39	34,2	cyclictest	0	-21	swapper/1	05:20:01	1
3957068	99	39	25,8	cyclictest	4091392	-21	spawn	05:34:56	0
3957068	99	39	1,35	cyclictest	652419	-21	ntpq	06:29:58	0
3957068	99	39	1,35	cyclictest	3959921	-21	ntpq	05:14:57	0
3957070	99	38	32,3	cyclictest	0	-21	swapper/2	05:25:01	2
3957070	99	38	30,5	cyclictest	207494	-21	spawn	06:03:19	2
3957070	99	38	30,5	cyclictest	207494	-21	spawn	06:03:19	2
3957068	99	38	1,34	cyclictest	3957797	-21	sshd	05:08:36	0
3957068	99	37	1,33	cyclictest	647372	-21	/usr/sbin/munin	06:15:08	0
3957068	99	37	1,26	cyclictest	3963424	-21	/usr/sbin/munin	05:25:02	0
3957070	99	36	28,5	cyclictest	1165	-21	mta-sts-daemon	05:15:01	2
3957069	99	36	29,4	cyclictest	572671	-21	kworker/u8:8-xprtiod	06:25:01	1
3957070	99	35	28,4	cyclictest	655609	-21	cron	06:40:01	2
3957069	99	35	29,3	cyclictest	0	-21	swapper/1	05:30:01	1
3957069	99	35	28,4	cyclictest	73227	-21	modprobe	05:50:12	1
3957069	99	35	28,4	cyclictest	73227	-21	modprobe	05:50:12	1
3957070	99	34	25,5	cyclictest	3837257	-21	cups-browsed	06:27:31	2
3957070	99	34	21,10	cyclictest	649422	-21	needreboot	06:19:55	2
3957070	99	33	25,5	cyclictest	73221	-21	sshd	05:50:12	2
3957070	99	33	25,5	cyclictest	73221	-21	sshd	05:50:12	2
3957068	99	33	2,27	cyclictest	3957024	-21	munin-run	05:05:01	0
3957070	99	32	27,3	cyclictest	0	-21	swapper/2	05:28:22	2
3957069	99	32	27,2	cyclictest	0	-21	swapper/1	06:30:02	1
3957069	99	31	25,3	cyclictest	0	-21	swapper/1	06:20:01	1
3957070	99	27	21,2	cyclictest	0	-21	swapper/2	05:05:02	2
3957069	99	22	17,2	cyclictest	0	-21	swapper/1	05:05:02	1
3957071	99	19	3,7	cyclictest	0	-21	swapper/3	05:50:00	3
3957071	99	19	2,10	cyclictest	0	-21	swapper/3	06:10:03	3
3957071	99	19	2,10	cyclictest	0	-21	swapper/3	06:10:03	3
3957071	99	17	3,9	cyclictest	0	-21	swapper/3	06:10:09	3
3957071	99	17	3,8	cyclictest	0	-21	swapper/3	06:01:55	3
3957071	99	17	3,8	cyclictest	0	-21	swapper/3	06:01:55	3
3957071	99	17	3,6	cyclictest	0	-21	swapper/3	06:34:48	3
3957071	99	16	4,7	cyclictest	0	-21	swapper/3	05:35:02	3
3957071	99	16	3,8	cyclictest	0	-21	swapper/3	05:20:02	3
3957071	99	16	3,8	cyclictest	0	-21	swapper/3	05:10:01	3
3957071	99	15	3,8	cyclictest	0	-21	swapper/3	05:57:02	3
3957071	99	15	3,8	cyclictest	0	-21	swapper/3	05:40:06	3
3957071	99	15	3,7	cyclictest	0	-21	swapper/3	05:39:36	3
3957071	99	15	3,7	cyclictest	0	-21	swapper/3	05:39:36	3
3957071	99	15	1,7	cyclictest	0	-21	swapper/3	06:24:58	3
3957071	99	14	3,7	cyclictest	0	-21	swapper/3	05:15:01	3
3957071	99	14	3,6	cyclictest	0	-21	swapper/3	05:28:51	3
3957071	99	14	1,8	cyclictest	0	-21	swapper/3	05:24:56	3
3957071	99	13	2,6	cyclictest	0	-21	swapper/3	05:55:02	3
3957071	99	13	2,6	cyclictest	0	-21	swapper/3	05:55:02	3
3957071	99	13	1,8	cyclictest	0	-21	swapper/3	06:30:01	3
3957071	99	12	2,5	cyclictest	0	-21	swapper/3	06:40:02	3
3957071	99	12	1,7	cyclictest	0	-21	swapper/3	06:19:58	3
3957071	99	8	4,3	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