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 Thu Jan 29, 2026 00:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3326133	99	45	40,3	cyclictest	3368528	-21	kworker/u8:4+flush-259:0	20:35:01	3
3326133	99	45	39,4	cyclictest	3347193	-21	cat	19:30:01	3
3326133	99	45	38,5	cyclictest	3389157	-21	kworker/u8:1+flush-259:0	21:10:00	3
3326133	99	41	35,4	cyclictest	3452061	-21	/usr/sbin/munin	21:10:22	3
3326129	99	40	35,3	cyclictest	252	-21	systemd-journal	21:55:00	2
3326124	99	39	34,3	cyclictest	3483685	-21	kworker/u8:1+events_unbound	22:20:24	1
3326118	99	38	32,4	cyclictest	3431022	-21	apt-get	20:50:10	0
3326124	99	37	33,3	cyclictest	3420458	-21	kworker/u8:0+flush-259:0	20:40:22	1
3326124	99	36	31,3	cyclictest	3504330	-21	kworker/u8:0+flush-259:0	22:15:19	1
3326133	99	35	29,4	cyclictest	252	-21	systemd-journal	23:04:24	3
3326124	99	35	31,3	cyclictest	3591885	-21	kworker/u8:1+flush-259:0	23:25:21	1
3326118	99	35	32,2	cyclictest	3612952	-21	kworker/u8:3+flush-259:0	00:15:22	0
3326118	99	35	31,3	cyclictest	3555788	-21	kworker/u8:1+flush-259:0	22:55:25	0
3326118	99	35	30,3	cyclictest	3602914	-21	apt-get	23:35:10	0
3326129	99	34	30,2	cyclictest	3309272	-21	kworker/u8:3+flush-259:0	19:50:16	2
3326129	99	34	29,3	cyclictest	3591885	-21	kworker/u8:1+flush-259:0	23:25:00	2
3326129	99	34	29,3	cyclictest	252	-21	systemd-journal	23:11:26	2
3326124	99	34	30,3	cyclictest	3622737	-21	kworker/u8:4+flush-259:0	00:10:21	1
3326124	99	34	30,2	cyclictest	3591885	-21	kworker/u8:1+flush-259:0	23:35:22	1
3326124	99	33	29,3	cyclictest	3436589	-21	kworker/u8:4+events_unbound	21:10:21	1
3326118	99	33	29,3	cyclictest	3347543	-21	base64	19:30:01	0
3326133	99	32	28,3	cyclictest	252	-21	systemd-journal	23:58:00	3
3326133	99	32	28,3	cyclictest	252	-21	systemd-journal	23:58:00	3
3326129	99	32	26,4	cyclictest	3483659	-21	latency_hist	21:40:00	2
3326129	99	32	26,4	cyclictest	3483659	-21	latency_hist	21:40:00	2
3326124	99	32	28,3	cyclictest	3567422	-21	kworker/u8:2+events_unbound	23:40:22	1
3326124	99	32	25,3	cyclictest	3545583	-21	kworker/u8:3+flush-259:0	22:40:16	1
3326118	99	32	26,4	cyclictest	3576874	-21	latency_hist	23:10:01	0
3326118	99	32	26,4	cyclictest	3404616	-21	latency_hist	20:25:01	0
3326129	99	31	24,5	cyclictest	3398577	-21	ntpq	20:15:21	2
3326124	99	31	27,3	cyclictest	3483685	-21	kworker/u8:1+flush-259:0	21:51:14	1
3326124	99	31	24,5	cyclictest	509	-21	rs:main		1
3326118	99	31	27,3	cyclictest	3456964	-21	apt-get	21:15:00	0
3326124	99	30	27,2	cyclictest	3520005	-21	kworker/u8:2+flush-259:0	22:45:24	1
3326124	99	30	26,3	cyclictest	3643904	-21	kworker/u8:0+events_unbound	00:22:16	1
3326124	99	30	26,3	cyclictest	3342087	-21	/usr/sbin/munin	19:25:14	1
3326124	99	30	25,3	cyclictest	3567422	-21	kworker/u8:2+flush-259:0	23:10:20	1
3326124	99	30	23,5	cyclictest	3571732	-21	latency_hist	23:05:00	1
3326118	99	30	26,3	cyclictest	252	-21	systemd-journal	21:51:09	0
3326129	99	29	22,5	cyclictest	3628433	-21	latency_hist	00:00:00	2
3326129	99	29	22,5	cyclictest	3628433	-21	latency_hist	00:00:00	2
3326124	99	29	25,3	cyclictest	3368528	-21	kworker/u8:4+events_unbound	19:55:22	1
3326133	99	28	23,3	cyclictest	252	-21	systemd-journal	20:41:00	3
3326133	99	28	22,4	cyclictest	3535502	-21	/usr/sbin/munin	22:30:13	3
3326129	99	28	21,5	cyclictest	252	-21	systemd-journal	20:00:01	2
3326124	99	28	25,2	cyclictest	3534393	-21	kworker/u8:0+flush-259:0	22:35:21	1
3326124	99	28	24,3	cyclictest	3664502	-21	kworker/u8:2+flush-259:0	00:35:21	1
3326124	99	28	24,3	cyclictest	3534393	-21	kworker/u8:0+flush-259:0	23:20:16	1
3326124	99	28	24,3	cyclictest	3483685	-21	kworker/u8:1+events_unbound	22:05:13	1
3326124	99	28	24,3	cyclictest	3309272	-21	kworker/u8:3+events_unbound	19:45:14	1
3326124	99	28	24,3	cyclictest	3309272	-21	kworker/u8:3+events_unbound	19:40:21	1
3326124	99	28	23,4	cyclictest	3597753	-21	apt-get	23:30:11	1
3326118	99	28	23,4	cyclictest	3372805	-21	ntpq	19:50:20	0
3326118	99	28	22,4	cyclictest	3335775	-21	ntpq	19:15:21	0
3326118	99	28	22,4	cyclictest	3335775	-21	ntpq	19:15:20	0
3326133	99	27	20,5	cyclictest	3591443	-21	ntpq	23:20:22	3
3326129	99	27	23,3	cyclictest	3325908	-21	kworker/u8:0+flush-259:0	19:20:21	2
3326124	99	27	24,2	cyclictest	3534393	-21	kworker/u8:0+flush-259:0	23:15:20	1
3326124	99	27	23,3	cyclictest	3399455	-21	kworker/u8:2+events_unbound	20:35:14	1
3326124	99	27	22,3	cyclictest	3462565	-21	kworker/u8:0+flush-259:0	21:25:16	1
3326133	99	26	21,4	cyclictest	3483685	-21	kworker/u8:1+flush-259:0	22:20:21	3
3326133	99	26	21,3	cyclictest	3567422	-21	kworker/u8:2+flush-259:0	23:45:00	3
3326129	99	26	22,3	cyclictest	3556361	-21	base64	22:50:01	2
3326124	99	26	23,2	cyclictest	3483686	-21	kworker/u8:2+events_unbound	21:40:25	1
3326124	99	26	23,2	cyclictest	3389157	-21	kworker/u8:1+events_unbound	21:20:01	1
3326124	99	26	23,2	cyclictest	3389157	-21	kworker/u8:1+events_unbound	20:15:57	1
3326124	99	26	22,3	cyclictest	3561664	-21	kworker/u8:3+events_unbound	22:58:26	1
3326124	99	26	22,3	cyclictest	3504330	-21	kworker/u8:0+flush-259:0	22:10:15	1
3326124	99	26	21,4	cyclictest	3314390	-21	kworker/u8:1+flush-259:0	19:10:21	1
3326124	99	26	21,3	cyclictest	3520005	-21	kworker/u8:2+flush-259:0	22:50:21	1
3326118	99	26	21,4	cyclictest	3330665	-21	ntpq	19:10:22	0
3326129	99	25	20,3	cyclictest	3618069	-21	latency_hist	23:50:00	2
3326129	99	25	19,4	cyclictest	3644304	-21	diskstats	00:15:11	2
3326129	99	25	18,4	cyclictest	252	-21	systemd-journal	23:55:01	2
3326124	99	25	22,2	cyclictest	3612952	-21	kworker/u8:3+events_unbound	00:01:24	1
3326124	99	25	22,2	cyclictest	3436589	-21	kworker/u8:4+flush-259:0	21:06:24	1
3326124	99	25	21,3	cyclictest	3336351	-21	kworker/u8:2+events_unbound	19:30:15	1
3326124	99	25	21,2	cyclictest	3404854	-21	/usr/sbin/munin	20:25:13	1
3326118	99	25	21,3	cyclictest	3399455	-21	kworker/u8:2+flush-259:0	20:40:00	0
3326133	99	24	20,3	cyclictest	3325908	-21	kworker/u8:0+flush-259:0	19:40:00	3
3326133	99	24	18,4	cyclictest	3555846	-21	latency_hist	22:50:01	3
3326133	99	24	18,4	cyclictest	3478785	-21	apt-get	21:35:11	3
3326133	99	24	18,4	cyclictest	3478785	-21	apt-get	21:35:10	3
3326133	99	24	18,4	cyclictest	3325860	-21	apt-get	19:10:01	3
3326133	99	24	18,4	cyclictest	3325860	-21	apt-get	19:10:01	3
3326129	99	24	19,4	cyclictest	3457176	-21	gpgv	21:15:00	2
3326129	99	24	18,4	cyclictest	3519780	-21	latency_hist	22:15:01	2
3326124	99	24	20,3	cyclictest	3399455	-21	kworker/u8:2+flush-259:0	20:30:22	1
3326124	99	24	20,3	cyclictest	3389157	-21	kworker/u8:1+events_unbound	21:18:24	1
3326124	99	23	20,2	cyclictest	3436589	-21	kworker/u8:4+events_unbound	21:35:00	1
3326124	99	23	20,2	cyclictest	3399455	-21	kworker/u8:2+events_unbound	20:45:21	1
3326124	99	23	19,3	cyclictest	3653781	-21	kworker/u8:1+events_unbound	00:34:25	1
3326124	99	23	19,3	cyclictest	3623470	-21	/usr/sbin/munin	23:55:16	1
3326124	99	23	19,3	cyclictest	3623470	-21	/usr/sbin/munin	23:55:15	1
3326133	99	22	17,3	cyclictest	3394583	-21	apt-get	20:15:11	3
3326133	99	22	16,4	cyclictest	252	-21	systemd-journal	20:39:56	3
3326129	99	22	17,4	cyclictest	3357799	-21	gpgv	19:40:00	2
3326129	99	22	12,9	cyclictest	252	-21	systemd-journal	20:05:24	2
3326124	99	22	19,2	cyclictest	3309272	-21	kworker/u8:3+flush-259:0	19:50:21	1
3326124	99	22	18,3	cyclictest	3612952	-21	kworker/u8:3+events_unbound	23:45:22	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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