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 792 highest latencies:

System rack2slot7s.osadl.org (updated Fri Mar 20, 2026 07:54:54)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1705931	99	71	56,11	cyclictest	2523206	-21	tee	06:10:47	0
1705932	99	68	57,6	cyclictest	1947419	-21	sort	05:40:38	1
1705932	99	64	50,8	cyclictest	2523809	-21	sh	06:10:48	1
1705933	99	61	54,4	cyclictest	0	-21	swapper/2	05:40:46	2
1705931	99	61	53,4	cyclictest	1948224	-21	sh	05:40:41	0
1705933	99	54	43,8	cyclictest	2523608	-21	sh	06:10:48	2
1705932	99	51	30,17	cyclictest	2452491	-21	sh	06:07:49	1
1705932	99	51	30,17	cyclictest	2452491	-21	sh	06:07:49	1
1705931	99	51	42,4	cyclictest	0	-21	swapper/0	05:50:42	0
1705933	99	49	41,5	cyclictest	2484124	-21	expr	06:09:05	2
1705933	99	49	41,5	cyclictest	2484124	-21	expr	06:09:05	2
1705933	99	48	2,40	cyclictest	1710895	-21	execl	05:20:35	2
1705933	99	47	1,5	cyclictest	17	1	rcu_preempt	06:04:20	2
1705933	99	47	1,5	cyclictest	17	1	rcu_preempt	06:04:20	2
1705932	99	47	27,17	cyclictest	2580790	-21	cron	06:25:01	1
1705933	99	46	40,3	cyclictest	0	-21	swapper/2	05:50:30	2
1705932	99	45	37,5	cyclictest	2016393	-21	execl	05:50:54	1
1705932	99	44	36,5	cyclictest	1937940	-21	sh	05:40:02	1
1705931	99	44	28,5	cyclictest	2460390	-21	sh	06:08:07	0
1705931	99	44	28,5	cyclictest	2460390	-21	sh	06:08:07	0
1705932	99	43	26,14	cyclictest	2096789	-21	spawn	06:03:08	1
1705932	99	43	26,14	cyclictest	2096789	-21	spawn	06:03:08	1
1705931	99	43	35,5	cyclictest	2020471	-21	Run	06:02:38	0
1705931	99	43	35,5	cyclictest	2020471	-21	Run	06:02:38	0
1705932	99	42	34,5	cyclictest	2015389	-21	execl	05:50:01	1
1705931	99	42	24,12	cyclictest	15	1	ktimers/0	05:30:40	0
1705933	99	41	1,34	cyclictest	1712370	-21	fstime	05:25:37	2
1705932	99	41	1,5	cyclictest	2581713	-21	ntpq	06:25:35	1
1705931	99	41	31,7	cyclictest	2015390	-21	execl	05:50:01	0
1705932	99	40	2,4	cyclictest	2584713	-21	ntpq	06:35:38	1
1705932	99	40	24,13	cyclictest	1711003	-21	aten_r2power_fr	05:20:24	1
1705933	99	39	31,5	cyclictest	2015391	-21	execl	05:49:38	2
1705933	99	39	30,5	cyclictest	1938101	-21	multi.sh	05:40:02	2
1705932	99	38	1,5	cyclictest	1706768	-21	ntpq	05:05:32	1
1705932	99	38	14,20	cyclictest	2018519	-21	fstime	05:56:15	1
1705932	99	38	1,11	cyclictest	1712453	-21	/usr/sbin/munin	05:25:47	1
1705931	99	38	3,27	cyclictest	15	1	ktimers/0	06:35:42	0
1705932	99	37	2,5	cyclictest	1709937	-21	ntpq	05:15:38	1
1705932	99	37	2,5	cyclictest	1709937	-21	ntpq	05:15:38	1
1705932	99	37	1,9	cyclictest	2583163	-21	ntpq	06:30:33	1
1705932	99	37	1,9	cyclictest	2578733	-21	ntpq	06:15:38	1
1705932	99	37	1,5	cyclictest	1708307	-21	ntpq	05:10:37	1
1705931	99	37	23,9	cyclictest	1711633	-21	sh	05:20:41	0
1705931	99	37	18,14	cyclictest	124	50	irq/32-eth0	06:20:38	0
1705931	99	37	18,13	cyclictest	15	1	ktimers/0	06:25:33	0
1705933	99	36	24,8	cyclictest	1708902	-21	sh	05:15:00	2
1705931	99	35	27,5	cyclictest	1938015	-21	multi.sh	05:40:02	0
1705931	99	34	26,5	cyclictest	2018695	-21	Run	05:59:47	0
1705933	99	32	22,6	cyclictest	2580834	-21	rotate-stats	06:25:01	2
1705932	99	32	1,6	cyclictest	1714583	-21	sed	05:30:33	1
1705932	99	32	1,10	cyclictest	1705944	-21	munin-run	05:05:02	1
1705932	99	32	1,10	cyclictest	1705944	-21	munin-run	05:05:02	1
1705931	99	32	20,6	cyclictest	15	1	ktimers/0	05:15:33	0
1705931	99	32	20,6	cyclictest	15	1	ktimers/0	05:15:33	0
1705933	99	31	7,17	cyclictest	1167	-21	mta-sts-daemon	05:56:15	2
1705933	99	30	18,8	cyclictest	0	-21	swapper/2	06:30:34	2
1705931	99	30	25,3	cyclictest	1713598	-21	grep	05:25:45	0
1705933	99	29	23,3	cyclictest	0	-21	swapper/2	06:20:01	2
1705933	99	28	20,5	cyclictest	1903736	-21	cron	05:35:01	2
1705933	99	28	18,7	cyclictest	2585331	-21	sh	06:40:01	2
1705931	99	28	22,3	cyclictest	2583394	-21	mailstats	06:30:43	0
1705931	99	26	20,4	cyclictest	1707313	-21	tail	05:05:45	0
1705931	99	24	14,7	cyclictest	1708901	-21	cron	05:15:00	0
1705931	99	24	11,3	cyclictest	0	-21	swapper/0	06:20:01	0
1705933	99	23	18,2	cyclictest	0	-21	swapper/2	06:30:01	2
1705933	99	23	14,5	cyclictest	1709710	-21	sh	05:15:30	2
1705933	99	23	14,5	cyclictest	1709710	-21	sh	05:15:30	2
1705931	99	23	15,6	cyclictest	1706028	-21	latency_hist	05:05:03	0
1705931	99	23	15,6	cyclictest	1706028	-21	latency_hist	05:05:03	0
1705933	99	22	16,3	cyclictest	0	-21	swapper/2	05:05:34	2
1705933	99	18	11,3	cyclictest	0	-21	swapper/2	05:05:03	2
1705933	99	18	11,3	cyclictest	0	-21	swapper/2	05:05:03	2
1705934	99	17	9,5	cyclictest	0	-21	swapper/3	06:12:38	3
1705934	99	17	9,3	cyclictest	0	-21	swapper/3	06:15:37	3
1705934	99	17	8,4	cyclictest	0	-21	swapper/3	06:35:39	3
1705934	99	17	7,5	cyclictest	0	-21	swapper/3	05:05:33	3
1705934	99	17	10,5	cyclictest	0	-21	swapper/3	05:10:35	3
1705934	99	16	9,4	cyclictest	0	-21	swapper/3	06:25:38	3
1705934	99	16	8,6	cyclictest	0	-21	swapper/3	06:05:33	3
1705934	99	16	8,6	cyclictest	0	-21	swapper/3	06:05:33	3
1705934	99	16	7,6	cyclictest	0	-21	swapper/3	06:03:06	3
1705934	99	16	7,6	cyclictest	0	-21	swapper/3	06:03:06	3
1705934	99	16	7,5	cyclictest	0	-21	swapper/3	05:35:33	3
1705934	99	16	2,9	cyclictest	0	-21	swapper/3	05:40:40	3
1705934	99	16	10,4	cyclictest	0	-21	swapper/3	05:30:38	3
1705934	99	16	10,4	cyclictest	0	-21	swapper/3	05:15:36	3
1705934	99	16	10,4	cyclictest	0	-21	swapper/3	05:15:36	3
1705934	99	15	8,4	cyclictest	0	-21	swapper/3	05:45:39	3
1705934	99	15	10,3	cyclictest	0	-21	swapper/3	05:55:39	3
1705934	99	14	9,3	cyclictest	0	-21	swapper/3	06:30:33	3
1705934	99	14	9,3	cyclictest	0	-21	swapper/3	06:20:34	3
1705934	99	14	7,4	cyclictest	0	-21	swapper/3	05:50:15	3
1705934	99	14	7,4	cyclictest	0	-21	swapper/3	05:20:26	3
1705934	99	13	9,2	cyclictest	0	-21	swapper/3	05:05:01	3
1705934	99	13	9,2	cyclictest	0	-21	swapper/3	05:05:01	3
1705934	99	13	6,4	cyclictest	0	-21	swapper/3	05:25:31	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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