OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Wed Dec 10, 2025 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3233590	99	44	41,2	cyclictest	3519133	-21	kworker/u8:4+events_unbound	00:05:01	1
3233598	99	41	35,4	cyclictest	3280270	-21	latency_hist	19:55:01	3
3233590	99	41	35,4	cyclictest	3384596	-21	latency_hist	21:35:01	1
3233588	99	38	34,3	cyclictest	3228633	-21	kworker/u8:2+flush-259:0	19:40:22	0
3233588	99	37	31,4	cyclictest	3477727	-21	latency_hist	23:05:02	0
3233593	99	36	31,4	cyclictest	150154	-21	kworker/u8:4+flush-259:0	19:35:17	2
3233590	99	36	33,2	cyclictest	3228633	-21	kworker/u8:2+events_unbound	19:40:14	1
3233598	99	35	31,3	cyclictest	3291109	-21	gpgv	20:05:00	3
3233590	99	35	31,3	cyclictest	3259739	-21	kworker/u8:0+flush-259:0	20:20:26	1
3233598	99	34	27,5	cyclictest	3535240	-21	diskstats	00:00:13	3
3233590	99	34	31,2	cyclictest	3498348	-21	kworker/u8:2+flush-259:0	23:39:59	1
3233588	99	33	26,5	cyclictest	3316686	-21	ntpq	20:25:23	0
3233598	99	32	27,3	cyclictest	3467058	-21	kworker/u8:1+flush-259:0	22:55:19	3
3233590	99	32	29,2	cyclictest	3259739	-21	kworker/u8:0+flush-259:0	19:50:18	1
3233588	99	32	29,2	cyclictest	3457328	-21	kworker/u8:2+events_unbound	22:50:01	0
3233590	99	31	28,2	cyclictest	3498348	-21	kworker/u8:2+flush-259:0	00:15:23	1
3233590	99	31	28,2	cyclictest	3301737	-21	kworker/u8:3+events_unbound	21:25:18	1
3233593	99	30	23,5	cyclictest	3560677	-21	latency_hist	00:25:01	2
3233590	99	30	27,2	cyclictest	3436753	-21	kworker/u8:4+flush-259:0	22:45:00	1
3233590	99	30	27,2	cyclictest	3436753	-21	kworker/u8:4+events_unbound	22:32:40	1
3233598	99	29	25,3	cyclictest	3379433	-21	kworker/u8:2+flush-259:0	22:05:01	3
3233598	99	29	24,4	cyclictest	3343549	-21	kworker/u8:4+flush-259:0	21:05:18	3
3233590	99	29	26,2	cyclictest	3555515	-21	kworker/u8:4+events_unbound	00:20:18	1
3233590	99	29	26,2	cyclictest	3519133	-21	kworker/u8:4+flush-259:0	23:50:15	1
3233588	99	29	26,2	cyclictest	3259739	-21	kworker/u8:0+flush-259:0	20:05:17	0
3233588	99	29	22,5	cyclictest	2698871	-21	systemd-journal	23:55:00	0
3233590	99	28	25,2	cyclictest	3301737	-21	kworker/u8:3+flush-259:0	20:25:26	1
3233590	99	28	25,2	cyclictest	3259739	-21	kworker/u8:0+events_unbound	20:55:20	1
3233590	99	28	25,2	cyclictest	150154	-21	kworker/u8:4+flush-259:0	19:15:15	1
3233590	99	28	24,3	cyclictest	3498348	-21	kworker/u8:2+flush-259:0	00:15:00	1
3233588	99	28	25,2	cyclictest	3436753	-21	kworker/u8:4+flush-259:0	22:30:19	0
3233598	99	27	19,5	cyclictest	3467427	-21	latency_hist	22:55:01	3
3233590	99	27	22,3	cyclictest	2698871	-21	systemd-journal	22:05:00	1
3233588	99	27	25,1	cyclictest	3259739	-21	kworker/u8:0+events_unbound	19:40:00	0
3233588	99	27	23,3	cyclictest	3436753	-21	kworker/u8:4+flush-259:0	22:40:01	0
3233588	99	27	23,3	cyclictest	3431385	-21	diskstats	22:20:15	0
3233590	99	26	19,5	cyclictest	3399060	-21	ntpq	21:45:19	1
3233588	99	26	22,3	cyclictest	3415693	-21	apt-get	22:05:13	0
3233588	99	26	22,3	cyclictest	3301737	-21	kworker/u8:3+events_unbound	21:32:42	0
3233588	99	26	21,4	cyclictest	3233503	-21	latency_hist	19:10:00	0
3233593	99	25	22,2	cyclictest	3301737	-21	kworker/u8:3+events_unbound	21:25:00	2
3233593	99	25	19,4	cyclictest	3285431	-21	latency_hist	20:00:01	2
3233590	99	25	23,2	cyclictest	3228633	-21	kworker/u8:2+events_unbound	20:05:28	1
3233590	99	25	22,2	cyclictest	3472790	-21	kworker/u8:4+flush-259:0	23:10:27	1
3233590	99	25	22,2	cyclictest	3457328	-21	kworker/u8:2+flush-259:0	22:50:16	1
3233590	99	25	22,2	cyclictest	3410315	-21	kworker/u8:0+events_unbound	22:38:42	1
3233588	99	25	21,3	cyclictest	3301962	-21	apt-get	20:15:16	0
3233598	99	24	20,3	cyclictest	3379433	-21	kworker/u8:2+flush-259:0	21:30:19	3
3233598	99	24	18,4	cyclictest	3285457	-21	apt-key	20:00:00	3
3233598	99	24	17,5	cyclictest	3348487	-21	latency_hist	21:00:00	3
3233593	99	24	20,3	cyclictest	3472790	-21	kworker/u8:4+events_unbound	23:20:26	2
3233593	99	24	20,3	cyclictest	3410315	-21	kworker/u8:0+flush-259:0	22:00:17	2
3233593	99	24	18,4	cyclictest	3253738	-21	ntpq	19:25:21	2
3233590	99	24	21,2	cyclictest	3259739	-21	kworker/u8:0+flush-259:0	21:20:15	1
3233588	99	24	21,2	cyclictest	3472790	-21	kworker/u8:4+flush-259:0	23:10:16	0
3233598	99	23	18,3	cyclictest	3228633	-21	kworker/u8:2+flush-259:0	19:40:15	3
3233593	99	23	18,3	cyclictest	3343549	-21	kworker/u8:4+events_unbound	21:05:23	2
3233590	99	23	20,2	cyclictest	3301737	-21	kworker/u8:3+events_unbound	21:06:59	1
3233590	99	23	20,2	cyclictest	3249676	-21	kworker/u8:1+flush-259:0	19:25:18	1
3233590	99	23	19,3	cyclictest	3343549	-21	kworker/u8:4+events_unbound	21:00:19	1
3233588	99	23	20,2	cyclictest	3379433	-21	kworker/u8:2+events_unbound	21:35:25	0
3233588	99	23	20,2	cyclictest	3228633	-21	kworker/u8:2+events_unbound	19:20:21	0
3233588	99	23	18,4	cyclictest	3285949	-21	base64	20:00:01	0
3233598	99	22	19,2	cyclictest	3301737	-21	kworker/u8:3+flush-259:0	21:45:00	3
3233593	99	22	19,2	cyclictest	3249676	-21	kworker/u8:1+events_unbound	19:30:16	2
3233593	99	22	19,2	cyclictest	0	-21	swapper/2	21:29:59	2
3233593	99	22	18,3	cyclictest	3540185	-21	kworker/u8:3+events_unbound	00:25:17	2
3233593	99	22	18,3	cyclictest	3524092	-21	apt-get	23:50:00	2
3233593	99	22	17,4	cyclictest	3540185	-21	kworker/u8:3+flush-259:0	00:10:18	2
3233593	99	22	17,3	cyclictest	2698871	-21	systemd-journal	20:15:01	2
3233593	99	22	16,4	cyclictest	3000063	-21	rs:main		2
3233590	99	22	19,2	cyclictest	3415658	-21	kworker/u8:4+events_unbound	22:05:19	1
3233590	99	22	19,2	cyclictest	3379433	-21	kworker/u8:2+events_unbound	21:35:19	1
3233590	99	22	18,3	cyclictest	3540185	-21	kworker/u8:3+events_unbound	00:32:44	1
3233588	99	22	18,3	cyclictest	3498348	-21	kworker/u8:2+events_unbound	23:44:41	0
3233588	99	22	15,5	cyclictest	3507766	-21	ntpq	23:30:22	0
3233598	99	21	16,3	cyclictest	3239183	-21	gpgv	19:15:01	3
3233598	99	21	16,3	cyclictest	3239183	-21	gpgv	19:15:00	3
3233598	99	21	15,4	cyclictest	3322978	-21	/usr/sbin/munin	20:35:13	3
3233593	99	21	18,2	cyclictest	3472790	-21	kworker/u8:4+flush-259:0	23:10:19	2
3233593	99	21	18,2	cyclictest	3410315	-21	kworker/u8:0+flush-259:0	22:40:01	2
3233593	99	21	18,2	cyclictest	3410315	-21	kworker/u8:0+events_unbound	22:20:00	2
3233593	99	21	16,4	cyclictest	3482885	-21	latency_hist	23:10:01	2
3233593	99	21	15,5	cyclictest	3305995	-21	ntpq	20:15:25	2
3233590	99	21	19,2	cyclictest	3259739	-21	kworker/u8:0+events_unbound	20:46:54	1
3233590	99	21	18,2	cyclictest	3343549	-21	kworker/u8:4+flush-259:0	21:10:21	1
3233590	99	21	18,2	cyclictest	3280289	-21	kworker/u8:1+events_unbound	20:00:26	1
3233590	99	21	18,2	cyclictest	3259739	-21	kworker/u8:0+events_unbound	20:50:17	1
3233590	99	21	17,3	cyclictest	3565835	-21	kworker/u8:0+events_unbound	00:35:19	1
3233590	99	21	17,3	cyclictest	3436215	-21	gpgv	22:25:01	1
3233588	99	21	18,2	cyclictest	3259739	-21	kworker/u8:0+flush-259:0	20:10:27	0
3233588	99	21	17,3	cyclictest	3519133	-21	kworker/u8:4+events_unbound	23:55:42	0
3233588	99	21	17,3	cyclictest	3519133	-21	kworker/u8:4+events_unbound	23:55:41	0
3233588	99	21	16,3	cyclictest	3565835	-21	kworker/u8:0+events_unbound	00:30:17	0
3233598	99	20	16,3	cyclictest	3379433	-21	kworker/u8:2+flush-259:0	22:00:00	3
3233593	99	20	17,2	cyclictest	3259739	-21	kworker/u8:0+flush-259:0	19:50:17	2
3233593	99	20	16,3	cyclictest	3566077	-21	apt-get	00:30:12	2
3233593	99	20	16,3	cyclictest	3259739	-21	kworker/u8:0+events_unbound	20:55:18	2
3233590	99	20	18,1	cyclictest	3259739	-21	kworker/u8:0+flush-259:0	20:35:17	1
3233590	99	20	17,2	cyclictest	3529940	-21	apt-get	23:55:15	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34