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 100 highest latencies:

System rack2slot7s.osadl.org (updated Fri Mar 13, 2026 07:54:57)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1802158	99	78	63,11	cyclictest	577	-21	mta-sts-daemon	05:50:34	0
1802158	99	76	63,9	cyclictest	2628706	-21	sh	06:10:36	0
1802160	99	63	52,7	cyclictest	2628674	-21	wc	06:10:36	2
1802158	99	57	43,9	cyclictest	0	-21	swapper/0	05:25:29	0
1802158	99	57	43,10	cyclictest	2614169	-21	multi.sh	06:10:01	0
1802158	99	57	43,10	cyclictest	2614169	-21	multi.sh	06:10:01	0
1802160	99	56	47,5	cyclictest	0	-21	swapper/2	05:20:38	2
1802160	99	56	44,5	cyclictest	0	-21	swapper/2	05:50:39	2
1802160	99	55	45,6	cyclictest	2690818	-21	systemd-run	06:25:01	2
1802158	99	54	42,9	cyclictest	2040930	-21	tee	05:40:29	0
1802159	99	51	43,5	cyclictest	2677512	-21	multi.sh	06:12:35	1
1802160	99	50	42,5	cyclictest	2053532	-21	sh	05:41:02	2
1802159	99	50	42,5	cyclictest	2084449	-21	multi.sh	05:42:21	1
1802160	99	49	39,6	cyclictest	2611784	-21	sh	06:09:56	2
1802160	99	49	39,6	cyclictest	2611784	-21	sh	06:09:56	2
1802159	99	46	39,4	cyclictest	2534513	-21	sh	06:06:51	1
1802159	99	46	39,4	cyclictest	2534513	-21	sh	06:06:51	1
1802158	99	43	37,4	cyclictest	2116750	-21	Run	05:58:56	0
1802158	99	43	37,4	cyclictest	2116750	-21	Run	05:58:56	0
1802159	99	42	34,5	cyclictest	2113776	-21	execl	05:50:29	1
1802158	99	42	27,5	cyclictest	2002650	-21	sh	05:37:17	0
1802160	99	41	34,4	cyclictest	2034772	-21	sh	05:40:01	2
1802160	99	41	33,5	cyclictest	1802218	-21	latency_hist	05:05:02	2
1802159	99	41	32,6	cyclictest	2116768	-21	Run	05:59:09	1
1802159	99	41	32,6	cyclictest	2116768	-21	Run	05:59:09	1
1802160	99	40	32,5	cyclictest	2113528	-21	execl	05:50:01	2
1802159	99	40	34,3	cyclictest	0	-21	swapper/1	06:25:33	1
1802158	99	40	33,4	cyclictest	1805212	-21	systemd-run	05:15:01	0
1802158	99	40	30,6	cyclictest	15	1	ktimers/0	06:15:30	0
1802160	99	39	31,5	cyclictest	2393230	-21	spawn	06:04:17	2
1802160	99	39	31,5	cyclictest	2393230	-21	spawn	06:04:17	2
1802159	99	39	30,6	cyclictest	2213983	-21	spawn	06:03:12	1
1802159	99	39	30,6	cyclictest	2213983	-21	spawn	06:03:12	1
1802160	99	38	29,6	cyclictest	2115395	-21	fstime	05:55:27	2
1802160	99	38	29,6	cyclictest	2115395	-21	fstime	05:55:27	2
1802159	99	38	30,5	cyclictest	2113529	-21	execl	05:50:01	1
1802158	99	38	33,3	cyclictest	0	-21	swapper/0	05:20:00	0
1802158	99	38	32,4	cyclictest	2113526	-21	execl	05:50:03	0
1802158	99	38	30,6	cyclictest	2469566	-21	spawn	06:04:15	0
1802158	99	38	30,6	cyclictest	2469566	-21	spawn	06:04:15	0
1802160	99	37	1,6	cyclictest	17	1	rcu_preempt	05:05:30	2
1802158	99	37	23,8	cyclictest	737	-21	sshd	05:30:29	0
1802159	99	36	1,32	cyclictest	2001590	-21	syscall	05:35:31	1
1802159	99	35	24,8	cyclictest	1808466	-21	sh	05:25:01	1
1802158	99	35	24,4	cyclictest	2690778	-21	cron	06:25:01	0
1802159	99	34	22,2	cyclictest	1804880	-21	ls	05:10:41	1
1802160	99	33	24,7	cyclictest	2689266	-21	latency_hist	06:20:03	2
1802159	99	33	26,4	cyclictest	1810022	-21	cron	05:30:00	1
1802158	99	33	1,26	cyclictest	1807123	-21	execl	05:20:37	0
1802160	99	32	25,4	cyclictest	0	-21	swapper/2	05:20:01	2
1802160	99	32	1,28	cyclictest	1808677	-21	fstime	05:25:35	2
1802160	99	32	1,26	cyclictest	1810575	-21	pipe	05:30:28	2
1802159	99	32	24,5	cyclictest	2693805	-21	systemd-run	06:35:01	1
1802159	99	32	24,5	cyclictest	1811266	-21	timerandwakeup	05:30:40	1
1802159	99	32	20,2	cyclictest	17	1	rcu_preempt	05:15:28	1
1802158	99	32	25,4	cyclictest	2691876	-21	systemctl	06:25:37	0
1802159	99	31	12,4	cyclictest	17	1	rcu_preempt	06:35:32	1
1802160	99	30	14,12	cyclictest	3606321	-21	systemd-journal	05:10:29	2
1802160	99	30	11,14	cyclictest	1165	-21	mta-sts-daemon	06:25:31	2
1802160	99	29	0,24	cyclictest	2693155	-21	sshd	06:30:29	2
1802158	99	29	23,3	cyclictest	0	-21	swapper/0	06:35:29	0
1802160	99	28	22,3	cyclictest	0	-21	swapper/2	06:40:01	2
1802159	99	28	22,3	cyclictest	17	1	rcu_preempt	06:20:33	1
1802159	99	28	20,5	cyclictest	1	-21	systemd	05:10:01	1
1802159	99	25	14,5	cyclictest	27	1	ktimers/1	06:15:35	1
1802158	99	24	16,4	cyclictest	1802296	-21	latency_hist	05:05:02	0
1802158	99	24	11,10	cyclictest	0	-21	swapper/0	05:05:41	0
1802159	99	23	5,3	cyclictest	17	1	rcu_preempt	05:05:01	1
1802158	99	23	1,16	cyclictest	2693157	-21	sshd	06:30:29	0
1802161	99	19	8,4	cyclictest	0	-21	swapper/3	06:15:30	3
1802161	99	19	10,4	cyclictest	0	-21	swapper/3	05:30:35	3
1802161	99	18	9,4	cyclictest	0	-21	swapper/3	05:35:29	3
1802161	99	18	9,4	cyclictest	0	-21	swapper/3	05:05:31	3
1802161	99	18	7,6	cyclictest	0	-21	swapper/3	05:57:52	3
1802161	99	18	7,6	cyclictest	0	-21	swapper/3	05:57:52	3
1802161	99	18	2,9	cyclictest	0	-21	swapper/3	05:25:32	3
1802161	99	17	9,4	cyclictest	0	-21	swapper/3	06:25:36	3
1802161	99	17	8,4	cyclictest	0	-21	swapper/3	05:15:30	3
1802161	99	17	3,9	cyclictest	0	-21	swapper/3	06:01:17	3
1802161	99	17	3,9	cyclictest	0	-21	swapper/3	06:01:17	3
1802161	99	17	1,9	cyclictest	0	-21	swapper/3	06:10:40	3
1802161	99	16	8,5	cyclictest	0	-21	swapper/3	05:50:36	3
1802161	99	16	8,4	cyclictest	0	-21	swapper/3	06:35:29	3
1802161	99	16	7,6	cyclictest	0	-21	swapper/3	05:40:30	3
1802161	99	16	7,5	cyclictest	0	-21	swapper/3	06:05:29	3
1802161	99	16	7,5	cyclictest	0	-21	swapper/3	06:05:29	3
1802161	99	16	10,4	cyclictest	0	-21	swapper/3	05:45:33	3
1802161	99	15	8,4	cyclictest	0	-21	swapper/3	05:10:28	3
1802161	99	15	7,5	cyclictest	0	-21	swapper/3	06:30:29	3
1802161	99	15	7,4	cyclictest	0	-21	swapper/3	06:20:27	3
1802161	99	15	11,2	cyclictest	0	-21	swapper/3	05:05:01	3
1802161	99	14	7,4	cyclictest	0	-21	swapper/3	05:20:29	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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