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 Mon Mar 09, 2026 07:54:59)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
672930	99	68	49,15	cyclictest	1499074	-21	sh	06:10:48	2
672930	99	60	31,5	cyclictest	1430862	-21	looper	06:08:03	2
672930	99	60	31,5	cyclictest	1430862	-21	looper	06:08:03	2
672930	99	60	30,5	cyclictest	939668	-21	multi.sh	05:41:47	2
672929	99	59	49,7	cyclictest	911831	-21	sh	05:40:36	1
672928	99	58	47,8	cyclictest	1499048	-21	od	06:10:47	0
672930	99	54	28,5	cyclictest	982386	-21	execl	05:50:22	2
672929	99	52	44,5	cyclictest	1504688	-21	multi.sh	06:11:04	1
672929	99	49	42,4	cyclictest	1478089	-21	sh	06:09:55	1
672929	99	49	42,4	cyclictest	1478089	-21	sh	06:09:55	1
672929	99	48	42,3	cyclictest	0	-21	swapper/1	05:50:34	1
672928	99	47	38,6	cyclictest	909833	-21	expr	05:40:29	0
672928	99	45	39,4	cyclictest	982386	-21	execl	05:50:36	0
672928	99	44	33,4	cyclictest	1397216	-21	sh	06:06:43	0
672928	99	44	33,4	cyclictest	1397216	-21	sh	06:06:43	0
672929	99	43	35,5	cyclictest	1556895	-21	munin-run	06:25:01	1
672929	99	43	34,6	cyclictest	1260561	-21	spawn	06:03:57	1
672928	99	42	36,4	cyclictest	985418	-21	Run	05:59:34	0
672928	99	42	36,4	cyclictest	985418	-21	Run	05:59:34	0
672928	99	42	31,9	cyclictest	982135	-21	execl	05:50:02	0
672928	99	42	27,12	cyclictest	904166	-21	sh	05:40:01	0
672930	99	41	34,4	cyclictest	1214297	-21	spawn	06:03:44	2
672930	99	40	33,4	cyclictest	1561448	-21	idleruntime-cro	06:40:01	2
672930	99	40	32,5	cyclictest	904154	-21	sendmail	05:40:01	2
672930	99	39	31,5	cyclictest	985297	-21	sh	05:57:40	2
672930	99	39	31,5	cyclictest	985297	-21	sh	05:57:40	2
672930	99	39	31,5	cyclictest	672949	-21	latency_hist	05:05:02	2
672929	99	39	33,3	cyclictest	671583	-21	kworker/u8:19-xprtiod	05:40:03	1
672929	99	39	31,5	cyclictest	1	-21	systemd	06:20:01	1
672929	99	39	31,5	cyclictest	0	-21	swapper/1	05:56:14	1
672929	99	39	31,5	cyclictest	0	-21	swapper/1	05:56:14	1
672929	99	39	30,6	cyclictest	869996	-21	wc	05:35:02	1
672928	99	39	31,5	cyclictest	823206	-21	spawn	05:34:38	0
672929	99	38	30,4	cyclictest	0	-21	swapper/1	05:49:52	1
672930	99	37	29,5	cyclictest	982133	-21	execl	05:50:00	2
672928	99	37	30,4	cyclictest	987160	-21	context1	06:02:08	0
672928	99	37	28,6	cyclictest	1555361	-21	cron	06:20:01	0
672930	99	36	28,4	cyclictest	0	-21	swapper/2	05:25:23	2
672930	99	36	1,30	cyclictest	677890	-21	execl	05:20:32	2
672929	99	36	3,27	cyclictest	677890	-21	execl	05:20:33	1
672929	99	36	0,32	cyclictest	679444	-21	fstime	05:25:34	1
672928	99	36	28,5	cyclictest	662730	-21	munin-node	06:35:41	0
672930	99	34	26,5	cyclictest	1556980	-21	latency_hist	06:25:02	2
672930	99	34	25,4	cyclictest	0	-21	swapper/2	05:30:32	2
672930	99	33	27,3	cyclictest	0	-21	swapper/2	05:10:01	2
672928	99	33	26,4	cyclictest	677411	-21	grep	05:15:39	0
672928	99	31	24,4	cyclictest	669046	-21	kworker/u8:4+xprtiod	05:25:01	0
672930	99	30	4,18	cyclictest	577	-21	mta-sts-daemon	06:30:32	2
672928	99	30	9,13	cyclictest	124	50	irq/32-eth0	06:30:33	0
672928	99	30	21,7	cyclictest	673812	-21	ntp_kernel_pll_	05:05:31	0
672928	99	30	1,16	cyclictest	680733	-21	fstime	05:29:00	0
672929	99	29	22,3	cyclictest	0	-21	swapper/1	05:05:35	1
672929	99	29	21,5	cyclictest	1560244	-21	aten_r2power_en	06:35:18	1
672928	99	29	20,5	cyclictest	15	1	ktimers/0	05:10:27	0
672930	99	28	23,2	cyclictest	0	-21	swapper/2	05:20:01	2
672929	99	28	22,3	cyclictest	0	-21	swapper/1	06:35:01	1
672928	99	28	23,3	cyclictest	1166	-21	mta-sts-daemon	06:20:30	0
672930	99	27	19,5	cyclictest	0	-21	swapper/2	06:30:01	2
672930	99	26	18,5	cyclictest	675903	-21	munin-run	05:15:01	2
672930	99	25	18,4	cyclictest	1554411	-21	gltestperf	06:15:21	2
672929	99	25	20,2	cyclictest	0	-21	swapper/1	05:20:01	1
672929	99	25	19,3	cyclictest	0	-21	swapper/1	06:25:18	1
672929	99	25	16,6	cyclictest	563	-21	avahi-daemon	05:10:39	1
672928	99	25	21,2	cyclictest	0	-21	swapper/0	05:05:02	0
672929	99	23	17,3	cyclictest	0	-21	swapper/1	05:05:02	1
672928	99	23	1,16	cyclictest	1557853	-21	ntpq	06:25:32	0
672931	99	18	2,6	cyclictest	0	-21	swapper/3	05:15:32	3
672931	99	16	2,9	cyclictest	0	-21	swapper/3	05:45:28	3
672931	99	16	1,8	cyclictest	0	-21	swapper/3	06:10:37	3
672931	99	16	1,7	cyclictest	0	-21	swapper/3	05:40:27	3
672931	99	15	2,8	cyclictest	0	-21	swapper/3	06:00:30	3
672931	99	15	1,6	cyclictest	0	-21	swapper/3	06:15:32	3
672931	99	14	3,7	cyclictest	0	-21	swapper/3	05:50:28	3
672931	99	14	2,5	cyclictest	0	-21	swapper/3	05:55:31	3
672931	99	14	2,5	cyclictest	0	-21	swapper/3	05:55:31	3
672931	99	14	1,7	cyclictest	0	-21	swapper/3	06:05:30	3
672931	99	14	1,7	cyclictest	0	-21	swapper/3	06:05:30	3
672931	99	14	1,6	cyclictest	0	-21	swapper/3	05:05:35	3
672931	99	13	2,8	cyclictest	0	-21	swapper/3	06:25:28	3
672931	99	13	2,4	cyclictest	0	-21	swapper/3	05:10:27	3
672931	99	13	1,5	cyclictest	0	-21	swapper/3	06:20:26	3
672931	99	13	1,4	cyclictest	0	-21	swapper/3	05:25:30	3
672931	99	11	1,7	cyclictest	0	-21	swapper/3	05:20:30	3
672931	99	11	1,6	cyclictest	0	-21	swapper/3	05:30:32	3
672931	99	11	1,5	cyclictest	0	-21	swapper/3	05:35:23	3
672931	99	10	3,4	cyclictest	0	-21	swapper/3	06:35:31	3
672931	99	10	1,5	cyclictest	0	-21	swapper/3	06:30:29	3
672931	99	8	2,5	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