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
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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 Dec 04, 2025 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
368410	99	49	46,2	cyclictest	75	-21	kswapd0	11:17:58	1
368406	99	46	43,2	cyclictest	75	-21	kswapd0	11:17:58	0
368410	99	41	39,1	cyclictest	466354	-21	fwupd	08:40:23	1
368406	99	41	38,2	cyclictest	409641	-21	kworker/u8:3+flush-259:0	08:35:00	0
368406	99	39	34,3	cyclictest	576380	-21	gpgv	10:30:01	0
368422	99	37	34,2	cyclictest	409641	-21	kworker/u8:3+flush-259:0	09:25:17	3
368415	99	37	33,3	cyclictest	409641	-21	kworker/u8:3+flush-259:0	08:10:00	2
368422	99	36	33,2	cyclictest	75	-21	kswapd0	11:18:00	3
368422	99	35	32,2	cyclictest	602707	-21	kworker/u8:2+flush-259:0	11:40:00	3
368422	99	33	30,2	cyclictest	654606	-21	kworker/u8:1+flush-259:0	11:55:17	3
368422	99	33	30,2	cyclictest	440988	-21	kworker/u8:4+flush-259:0	08:50:25	3
368422	99	33	29,3	cyclictest	550580	-21	kworker/u8:4+flush-259:0	10:45:21	3
368410	99	33	29,3	cyclictest	550580	-21	kworker/u8:4+flush-259:0	10:50:16	1
368410	99	30	21,6	cyclictest	2698871	-21	systemd-journal	09:25:01	1
368422	99	29	25,3	cyclictest	319678	-21	kworker/u8:2+flush-259:0	07:15:16	3
368415	99	29	23,4	cyclictest	467506	-21	/usr/sbin/munin	08:45:14	2
368422	99	28	24,3	cyclictest	685721	-21	/usr/sbin/munin	12:15:14	3
368415	99	28	22,4	cyclictest	582128	-21	/usr/sbin/munin	10:35:16	2
368415	99	28	22,4	cyclictest	2698871	-21	systemd-journal	07:35:00	2
368422	99	26	23,2	cyclictest	602707	-21	kworker/u8:2+events_unbound	11:50:24	3
368410	99	26	22,2	cyclictest	3000061	-21	in:imuxsock	12:40:00	1
368422	99	25	22,2	cyclictest	623285	-21	kworker/u8:1+events_unbound	11:25:18	3
368422	99	25	22,2	cyclictest	436017	-21	kworker/u8:1+flush-259:0	08:25:22	3
368422	99	25	18,2	cyclictest	409641	-21	kworker/u8:3+events_unbound	08:30:17	3
368410	99	25	21,3	cyclictest	535095	-21	kworker/u8:1+flush-259:0	10:00:23	1
368410	99	25	21,3	cyclictest	529710	-21	kworker/u8:3+events_unbound	09:55:17	1
368406	99	25	19,4	cyclictest	3000063	-21	rs:main		0
368406	99	25	18,5	cyclictest	653700	-21	ntpq	11:40:21	0
368406	99	25	18,5	cyclictest	508152	-21	ntpq	09:20:20	0
368422	99	24	21,2	cyclictest	409641	-21	kworker/u8:3+events_unbound	08:05:19	3
368422	99	24	19,4	cyclictest	435791	-21	latency_hist	08:15:00	3
368415	99	24	21,2	cyclictest	602707	-21	kworker/u8:2+flush-259:0	12:35:16	2
368415	99	24	20,3	cyclictest	685504	-21	kworker/u8:4+flush-259:0	12:30:26	2
368415	99	24	20,3	cyclictest	488655	-21	kworker/u8:0+events_unbound	09:20:14	2
368415	99	24	19,4	cyclictest	3000063	-21	rs:main		2
368410	99	24	19,3	cyclictest	436017	-21	kworker/u8:1+flush-259:0	08:25:24	1
368422	99	23	20,2	cyclictest	358080	-21	kworker/u8:1+flush-259:0	07:45:16	3
368422	99	23	19,3	cyclictest	575743	-21	kworker/u8:0+events_unbound	10:35:20	3
368415	99	23	20,2	cyclictest	670070	-21	kworker/u8:3+flush-259:0	12:00:21	2
368415	99	23	19,3	cyclictest	409641	-21	kworker/u8:3+events_unbound	09:05:25	2
368415	99	23	19,3	cyclictest	358080	-21	kworker/u8:1+flush-259:0	07:20:15	2
368415	99	23	17,4	cyclictest	2698871	-21	systemd-journal	08:40:23	2
368410	99	23	19,3	cyclictest	409641	-21	kworker/u8:3+flush-259:0	08:10:25	1
368410	99	23	16,5	cyclictest	2698871	-21	systemd-journal	08:50:27	1
368406	99	23	21,1	cyclictest	430533	-21	kworker/0:1+pm	08:40:24	0
368422	99	22	19,2	cyclictest	602707	-21	kworker/u8:2+events_unbound	11:10:15	3
368422	99	22	19,2	cyclictest	529710	-21	kworker/u8:3+flush-259:0	10:25:25	3
368422	99	22	18,3	cyclictest	436017	-21	kworker/u8:1+events_unbound	08:20:18	3
368422	99	22	18,3	cyclictest	436017	-21	kworker/u8:1+events_unbound	08:20:18	3
368422	99	22	18,2	cyclictest	388963	-21	cron	07:30:00	3
368415	99	22	19,2	cyclictest	503899	-21	grep	09:20:00	2
368415	99	22	18,3	cyclictest	602707	-21	kworker/u8:2+flush-259:0	11:00:24	2
368410	99	22	17,4	cyclictest	413897	-21	ntpq	07:50:21	1
368422	99	21	18,2	cyclictest	529710	-21	kworker/u8:3+events_unbound	10:30:22	3
368422	99	21	18,2	cyclictest	319678	-21	kworker/u8:2+flush-259:0	08:00:18	3
368422	99	21	17,3	cyclictest	436017	-21	kworker/u8:1+flush-259:0	08:15:25	3
368415	99	21	18,2	cyclictest	358080	-21	kworker/u8:1+flush-259:0	07:45:13	2
368415	99	21	17,2	cyclictest	550580	-21	kworker/u8:4+events_unbound	10:40:16	2
368410	99	21	17,3	cyclictest	319678	-21	kworker/u8:2+flush-259:0	08:00:32	1
368410	99	21	16,3	cyclictest	555816	-21	apt-get	10:10:12	1
368410	99	21	13,3	cyclictest	675235	-21	awk	12:05:00	1
368406	99	21	18,2	cyclictest	670070	-21	kworker/u8:3+flush-259:0	12:25:19	0
368406	99	21	16,3	cyclictest	575743	-21	kworker/u8:0+flush-259:0	11:00:17	0
368406	99	21	13,6	cyclictest	560727	-21	latency_hist	10:15:00	0
368422	99	20	17,2	cyclictest	560961	-21	kworker/u8:2+events_unbound	10:20:20	3
368422	99	20	17,2	cyclictest	409641	-21	kworker/u8:3+flush-259:0	08:45:19	3
368422	99	20	16,3	cyclictest	654606	-21	kworker/u8:1+events_unbound	12:10:14	3
368422	99	20	16,3	cyclictest	602707	-21	kworker/u8:2+events_unbound	11:30:25	3
368422	99	20	16,3	cyclictest	504123	-21	kworker/u8:1+flush-259:0	09:30:19	3
368422	99	20	16,2	cyclictest	2698871	-21	systemd-journal	09:10:00	3
368422	99	20	15,2	cyclictest	409641	-21	kworker/u8:3+events_unbound	08:40:25	3
368415	99	20	17,2	cyclictest	670070	-21	kworker/u8:3+events_unbound	12:27:25	2
368415	99	20	17,2	cyclictest	623285	-21	kworker/u8:1+events_unbound	11:20:17	2
368415	99	20	16,3	cyclictest	535095	-21	kworker/u8:1+flush-259:0	10:19:59	2
368415	99	20	15,4	cyclictest	441141	-21	cp	08:20:01	2
368410	99	20	14,4	cyclictest	2698871	-21	systemd-journal	09:38:26	1
368406	99	20	16,3	cyclictest	519608	-21	kworker/u8:2+flush-259:0	09:45:00	0
368406	99	20	15,4	cyclictest	576928	-21	/usr/sbin/munin	10:30:23	0
368406	99	20	15,4	cyclictest	544337	-21	ntpq	09:55:22	0
368406	99	20	14,4	cyclictest	690932	-21	apt-get	12:20:11	0
368422	99	19	16,2	cyclictest	602707	-21	kworker/u8:2+events_unbound	12:25:29	3
368422	99	19	16,2	cyclictest	529710	-21	kworker/u8:3+events_unbound	10:15:16	3
368422	99	19	15,3	cyclictest	602707	-21	kworker/u8:2+events_unbound	12:20:25	3
368422	99	19	15,3	cyclictest	535095	-21	kworker/u8:1+flush-259:0	10:00:21	3
368422	99	19	15,3	cyclictest	358080	-21	kworker/u8:1+events_unbound	07:40:25	3
368422	99	19	12,5	cyclictest	524531	-21	latency_hist	09:40:01	3
368415	99	19	16,2	cyclictest	644116	-21	latency_hist	11:35:00	2
368415	99	19	16,2	cyclictest	602707	-21	kworker/u8:2+flush-259:0	12:25:00	2
368415	99	19	16,2	cyclictest	319678	-21	kworker/u8:2+events_unbound	08:00:22	2
368415	99	19	14,4	cyclictest	2698871	-21	systemd-journal	11:40:00	2
368406	99	19	14,3	cyclictest	384073	-21	/usr/sbin/munin	07:25:15	0
368422	99	18	15,2	cyclictest	440988	-21	kworker/u8:4+events_unbound	08:57:27	3
368422	99	18	15,2	cyclictest	381244	-21	kthreadcore	07:20:20	3
368422	99	18	15,2	cyclictest	319678	-21	kworker/u8:2+events_unbound	07:50:22	3
368422	99	18	14,3	cyclictest	602707	-21	kworker/u8:2+events_unbound	11:05:01	3
368422	99	18	14,3	cyclictest	550580	-21	kworker/u8:4+flush-259:0	10:50:19	3
368422	99	18	14,3	cyclictest	319678	-21	kworker/u8:2+flush-259:0	07:10:23	3
368422	99	18	12,4	cyclictest	420080	-21	gpgv	08:00:00	3
368415	99	18	15,2	cyclictest	319678	-21	kworker/u8:2+events_unbound	07:35:15	2
368415	99	18	14,3	cyclictest	550580	-21	kworker/u8:4+events_unbound	10:45:24	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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