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 20, 2026 07:55:27)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3834700	99	84	48,32	cyclictest	455514	-21	sh	06:10:09	0
3834700	99	84	48,32	cyclictest	455514	-21	sh	06:10:09	0
3834702	99	64	50,9	cyclictest	456006	-21	sh	06:10:11	2
3834702	99	64	50,9	cyclictest	456006	-21	sh	06:10:11	2
3834700	99	63	55,5	cyclictest	4066428	-21	od	05:40:05	0
3834700	99	57	46,8	cyclictest	4147171	-21	execl	05:50:02	0
3834701	99	56	48,5	cyclictest	455851	-21	od	06:10:10	1
3834701	99	56	48,5	cyclictest	455851	-21	od	06:10:10	1
3834702	99	55	46,5	cyclictest	452861	-21	sh	06:10:02	2
3834700	99	53	31,18	cyclictest	4148089	-21	execl	05:50:08	0
3834701	99	52	44,5	cyclictest	449358	-21	multi.sh	06:09:52	1
3834701	99	52	42,6	cyclictest	4109984	-21	sh	05:42:03	1
3834701	99	49	41,5	cyclictest	4065432	-21	munin-run	05:40:00	1
3834701	99	48	40,5	cyclictest	525128	-21	ntpq	06:20:00	1
3834700	99	48	37,8	cyclictest	382107	-21	sh	06:07:09	0
3834702	99	47	39,5	cyclictest	4120438	-21	sh	05:42:31	2
3834700	99	47	39,5	cyclictest	4152116	-21	Run	06:01:18	0
3834700	99	46	36,6	cyclictest	0	-21	swapper/0	05:58:24	0
3834700	99	46	36,6	cyclictest	0	-21	swapper/0	05:58:24	0
3834701	99	45	36,6	cyclictest	4147171	-21	execl	05:50:01	1
3834702	99	44	35,5	cyclictest	4065437	-21	sh	05:40:00	2
3834702	99	43	35,5	cyclictest	4147169	-21	execl	05:50:01	2
3834702	99	43	33,7	cyclictest	3715378	-21	cups-browsed	05:14:58	2
3834701	99	43	5,34	cyclictest	3834871	-21	cat	05:05:02	1
3834701	99	43	35,5	cyclictest	526679	-21	run-parts	06:25:01	1
3834700	99	43	36,4	cyclictest	4065637	-21	sh	05:40:01	0
3834702	99	42	33,5	cyclictest	4148086	-21	execl	05:50:16	2
3834701	99	42	34,5	cyclictest	4148267	-21	mailstats	05:50:16	1
3834701	99	42	34,5	cyclictest	3842649	-21	systemctl	05:30:01	1
3834702	99	41	31,7	cyclictest	55886	-21	spawn	06:03:11	2
3834701	99	41	34,4	cyclictest	0	-21	swapper/1	06:03:47	1
3834701	99	40	31,6	cyclictest	1	-21	systemd	06:30:02	1
3834700	99	40	32,4	cyclictest	0	-21	swapper/0	05:25:03	0
3834702	99	38	31,3	cyclictest	0	-21	swapper/2	06:25:01	2
3834701	99	38	33,2	cyclictest	0	-21	swapper/1	06:35:08	1
3834700	99	38	34,2	cyclictest	0	-21	swapper/0	06:35:04	0
3834700	99	38	28,7	cyclictest	0	-21	swapper/0	06:20:00	0
3834702	99	37	33,2	cyclictest	0	-21	swapper/2	05:55:09	2
3834702	99	37	33,2	cyclictest	0	-21	swapper/2	05:55:09	2
3834702	99	37	30,4	cyclictest	3839403	-21	cron	05:20:01	2
3834700	99	37	30,4	cyclictest	0	-21	swapper/0	06:25:03	0
3834702	99	36	30,3	cyclictest	0	-21	swapper/2	05:25:00	2
3834702	99	36	28,4	cyclictest	525136	-21	latency_hist	06:20:02	2
3834702	99	36	27,6	cyclictest	582	-21	systemd-logind	05:05:01	2
3834701	99	36	4,24	cyclictest	3841195	-21	date	05:25:02	1
3834701	99	36	27,6	cyclictest	3836974	-21	unixbench_multi	05:10:14	1
3834700	99	36	30,4	cyclictest	3841170	-21	latency_hist	05:25:02	0
3834700	99	36	28,6	cyclictest	3926079	-21	sshd	05:34:07	0
3834700	99	36	28,6	cyclictest	3926079	-21	sshd	05:34:07	0
3834702	99	35	29,3	cyclictest	0	-21	swapper/2	06:30:01	2
3834702	99	35	1,24	cyclictest	3836450	-21	latency_hist	05:10:02	2
3834701	99	35	29,3	cyclictest	0	-21	swapper/1	06:00:01	1
3834701	99	35	29,3	cyclictest	0	-21	swapper/1	06:00:01	1
3834701	99	35	27,5	cyclictest	4029121	-21	latency_hist	05:35:03	1
3834701	99	35	27,5	cyclictest	4029121	-21	latency_hist	05:35:03	1
3834702	99	34	24,7	cyclictest	4020038	-21	tail	05:34:56	2
3834702	99	34	24,7	cyclictest	4020038	-21	tail	05:34:56	2
3834700	99	34	26,5	cyclictest	528146	-21	latency_hist	06:30:01	0
3834701	99	33	27,3	cyclictest	0	-21	swapper/1	05:20:02	1
3834700	99	33	2,26	cyclictest	3836386	-21	cat	05:10:02	0
3834700	99	33	16,11	cyclictest	529653	-21	latency_hist	06:35:02	0
3834702	99	32	26,3	cyclictest	0	-21	swapper/2	06:35:01	2
3834701	99	32	2,25	cyclictest	529760	-21	latency_hist	06:35:02	1
3834700	99	32	24,5	cyclictest	3837672	-21	cron	05:15:01	0
3834700	99	31	25,4	cyclictest	3834647	-21	latency_hist	05:05:02	0
3834700	99	30	24,3	cyclictest	0	-21	swapper/0	05:20:02	0
3834702	99	28	22,3	cyclictest	0	-21	swapper/2	05:27:19	2
3834702	99	27	22,2	cyclictest	0	-21	swapper/2	06:40:02	2
3834701	99	25	19,3	cyclictest	0	-21	swapper/1	05:05:03	1
3834703	99	19	2,9	cyclictest	0	-21	swapper/3	05:50:10	3
3834703	99	19	2,8	cyclictest	0	-21	swapper/3	06:25:01	3
3834703	99	18	2,9	cyclictest	0	-21	swapper/3	06:30:03	3
3834703	99	17	2,9	cyclictest	0	-21	swapper/3	06:20:00	3
3834703	99	17	1,9	cyclictest	0	-21	swapper/3	06:00:01	3
3834703	99	17	1,9	cyclictest	0	-21	swapper/3	06:00:01	3
3834703	99	17	1,7	cyclictest	0	-21	swapper/3	06:00:04	3
3834703	99	16	3,8	cyclictest	0	-21	swapper/3	06:10:08	3
3834703	99	16	3,8	cyclictest	0	-21	swapper/3	06:10:08	3
3834703	99	15	3,6	cyclictest	0	-21	swapper/3	05:35:12	3
3834703	99	15	1,8	cyclictest	0	-21	swapper/3	06:05:03	3
3834703	99	15	1,7	cyclictest	0	-21	swapper/3	05:30:05	3
3834703	99	15	1,7	cyclictest	0	-21	swapper/3	05:30:05	3
3834703	99	14	4,6	cyclictest	0	-21	swapper/3	05:40:04	3
3834703	99	14	1,7	cyclictest	0	-21	swapper/3	05:30:01	3
3834703	99	13	4,5	cyclictest	0	-21	swapper/3	05:10:01	3
3834703	99	13	3,5	cyclictest	0	-21	swapper/3	05:25:02	3
3834703	99	13	2,5	cyclictest	0	-21	swapper/3	05:15:04	3
3834703	99	13	1,7	cyclictest	0	-21	swapper/3	05:15:02	3
3834703	99	12	4,5	cyclictest	0	-21	swapper/3	05:45:06	3
3834703	99	11	4,4	cyclictest	0	-21	swapper/3	06:35:00	3
3834703	99	9	1,7	cyclictest	0	-21	swapper/3	06:35:03	3
3834703	99	9	1,5	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