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 17, 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
3270536	99	30	24,4	cyclictest	3592050	-21	latency_hist	12:20:01	1
3270537	99	29	23,4	cyclictest	3322134	-21	latency_hist	08:00:00	2
3270532	99	29	26,2	cyclictest	3327361	-21	kworker/u8:0+events_unbound	08:20:19	0
3270537	99	28	22,5	cyclictest	252	-21	systemd-journal	07:55:01	2
3270532	99	28	25,2	cyclictest	3250162	-21	kworker/u8:4+flush-259:0	07:45:23	0
3270532	99	28	21,5	cyclictest	3503595	-21	ntpq	10:50:21	0
3270539	99	27	23,3	cyclictest	3327361	-21	kworker/u8:0+flush-259:0	08:10:59	3
3270537	99	27	25,2	cyclictest	3482969	-21	kworker/u8:2+events_unbound	10:47:56	2
3270537	99	27	22,4	cyclictest	3488511	-21	latency_hist	10:40:00	2
3270536	99	27	24,2	cyclictest	3592084	-21	kworker/u8:2+flush-259:0	12:30:00	1
3270536	99	27	23,3	cyclictest	3494364	-21	kworker/u8:3+events_unbound	11:10:13	1
3270532	99	27	24,2	cyclictest	3529698	-21	kworker/u8:2+events_unbound	11:20:24	0
3270532	99	27	24,2	cyclictest	3462520	-21	kworker/u8:4+flush-259:0	10:25:20	0
3270539	99	26	20,4	cyclictest	252	-21	systemd-journal	08:59:59	3
3270536	99	26	21,3	cyclictest	3447088	-21	kworker/u8:1+flush-259:0	10:30:01	1
3270536	99	26	21,3	cyclictest	3343214	-21	latency_hist	08:20:02	1
3270532	99	26	22,3	cyclictest	3519943	-21	latency_hist	11:10:00	0
3270532	99	25	22,2	cyclictest	3529208	-21	kworker/u8:1+events_unbound	11:55:20	0
3270532	99	25	22,2	cyclictest	3250162	-21	kworker/u8:4+events_unbound	09:20:15	0
3270539	99	24	21,2	cyclictest	3545715	-21	kworker/u8:2+flush-259:0	11:39:59	3
3270539	99	24	21,2	cyclictest	3327361	-21	kworker/u8:0+events_unbound	08:05:21	3
3270537	99	24	21,2	cyclictest	3327361	-21	kworker/u8:0+events_unbound	08:34:57	2
3270537	99	24	16,5	cyclictest	3306597	-21	latency_hist	07:45:00	2
3270536	99	24	21,2	cyclictest	3545715	-21	kworker/u8:2+flush-259:0	11:40:21	1
3270532	99	24	21,2	cyclictest	3494364	-21	kworker/u8:3+events_unbound	11:15:17	0
3270532	99	24	21,2	cyclictest	3420848	-21	kworker/u8:3+flush-259:0	10:20:22	0
3270539	99	23	19,3	cyclictest	3374168	-21	latency_hist	08:50:01	3
3270537	99	23	16,5	cyclictest	3612609	-21	latency_hist	12:40:01	2
3270536	99	23	20,2	cyclictest	3415063	-21	kworker/u8:0+flush-259:0	09:30:00	1
3270536	99	23	20,2	cyclictest	3415063	-21	kworker/u8:0+flush-259:0	09:29:59	1
3270532	99	23	20,2	cyclictest	3529208	-21	kworker/u8:1+flush-259:0	11:50:22	0
3270532	99	23	20,2	cyclictest	3384517	-21	kworker/u8:2+events_unbound	09:15:17	0
3270532	99	23	19,3	cyclictest	3535399	-21	kworker/u8:0+flush-259:0	11:30:21	0
3270532	99	23	19,3	cyclictest	3369031	-21	kworker/u8:0+events_unbound	09:10:02	0
3270532	99	23	16,2	cyclictest	3462520	-21	kworker/u8:4+events_unbound	10:55:14	0
3270532	99	23	13,8	cyclictest	3369021	-21	idleruntime-cro	08:45:00	0
3270536	99	22	19,2	cyclictest	3210982	-21	kworker/u8:0+flush-259:0	07:15:00	1
3270536	99	22	16,4	cyclictest	3529380	-21	ntpq	11:15:22	1
3270532	99	22	19,2	cyclictest	3358911	-21	kworker/u8:3+flush-259:0	08:50:20	0
3270532	99	22	18,3	cyclictest	3400242	-21	kworker/u8:1+flush-259:0	09:45:24	0
3270532	99	22	18,3	cyclictest	3353760	-21	apt-get	08:30:12	0
3270532	99	22	18,3	cyclictest	3210982	-21	kworker/u8:0+events_unbound	07:10:32	0
3270539	99	21	18,2	cyclictest	3270488	-21	kworker/u8:2+flush-259:0	07:55:15	3
3270537	99	21	18,2	cyclictest	3358911	-21	kworker/u8:3+events_unbound	09:09:55	2
3270537	99	21	12,6	cyclictest	252	-21	systemd-journal	08:15:00	2
3270536	99	21	16,4	cyclictest	3420623	-21	latency_hist	09:35:01	1
3270532	99	21	15,4	cyclictest	3446405	-21	latency_hist	10:00:01	0
3270539	99	20	17,2	cyclictest	3545715	-21	kworker/u8:2+flush-259:0	12:10:00	3
3270539	99	20	17,2	cyclictest	3384517	-21	kworker/u8:2+flush-259:0	09:20:00	3
3270539	99	20	17,2	cyclictest	3270488	-21	kworker/u8:2+events_unbound	07:35:22	3
3270539	99	20	17,2	cyclictest	3250162	-21	kworker/u8:4+events_unbound	07:15:21	3
3270537	99	20	17,3	cyclictest	3250162	-21	kworker/u8:4+events_unbound	07:27:53	2
3270537	99	20	17,2	cyclictest	3545715	-21	kworker/u8:2+events_unbound	11:48:41	2
3270537	99	20	17,2	cyclictest	3545715	-21	kworker/u8:2+events_unbound	11:48:41	2
3270537	99	20	17,2	cyclictest	3447088	-21	kworker/u8:1+events_unbound	10:30:02	2
3270537	99	20	14,4	cyclictest	3504687	-21	/usr/sbin/munin	10:55:23	2
3270532	99	20	17,2	cyclictest	3581745	-21	kworker/u8:3+events_unbound	12:30:23	0
3270532	99	20	17,2	cyclictest	3447088	-21	kworker/u8:1+flush-259:0	10:15:01	0
3270532	99	20	17,2	cyclictest	3270488	-21	kworker/u8:2+flush-259:0	07:55:23	0
3270532	99	20	17,2	cyclictest	3270488	-21	kworker/u8:2+flush-259:0	07:54:27	0
3270532	99	20	17,2	cyclictest	3270488	-21	kworker/u8:2+flush-259:0	07:35:23	0
3270532	99	20	17,2	cyclictest	3250162	-21	kworker/u8:4+events_unbound	07:30:13	0
3270539	99	19	16,2	cyclictest	3447088	-21	kworker/u8:1+flush-259:0	10:15:25	3
3270539	99	19	16,2	cyclictest	3301485	-21	kworker/u8:1+flush-259:0	07:45:01	3
3270537	99	19	16,2	cyclictest	3250162	-21	kworker/u8:4+events_unbound	07:33:47	2
3270536	99	19	15,3	cyclictest	3358911	-21	kworker/u8:3+events_unbound	08:40:22	1
3270532	99	19	0,17	cyclictest	3494126	-21	unin-run	10:45:01	0
3270539	99	18	15,2	cyclictest	3529208	-21	kworker/u8:1+flush-259:0	11:25:20	3
3270539	99	18	15,2	cyclictest	3430951	-21	kworker/u8:0+events_unbound	09:45:22	3
3270539	99	18	15,2	cyclictest	3316866	-40	mandb	07:54:28	3
3270537	99	18	9,6	cyclictest	252	-21	systemd-journal	08:10:01	2
3270537	99	18	15,2	cyclictest	3529208	-21	kworker/u8:1+events_unbound	11:16:26	2
3270537	99	18	15,2	cyclictest	3499936	-21	irqcore	10:50:15	2
3270537	99	18	14,2	cyclictest	2971	-21	cron	08:30:00	2
3270536	99	18	16,1	cyclictest	3250162	-21	kworker/u8:4+events_unbound	09:00:16	1
3270536	99	18	15,2	cyclictest	3494364	-21	kworker/u8:3+events_unbound	11:05:21	1
3270536	99	18	15,2	cyclictest	3447088	-21	kworker/u8:1+flush-259:0	10:19:57	1
3270536	99	18	14,3	cyclictest	3250162	-21	kworker/u8:4+events_unbound	07:20:24	1
3270532	99	18	15,2	cyclictest	3415063	-21	kworker/u8:0+flush-259:0	09:30:16	0
3270532	99	18	15,2	cyclictest	3358911	-21	kworker/u8:3+events_unbound	08:35:23	0
3270532	99	18	15,2	cyclictest	3250162	-21	kworker/u8:4+events_unbound	08:55:07	0
3270532	99	18	15,2	cyclictest	3250162	-21	kworker/u8:4+events_unbound	08:15:15	0
3270532	99	18	1,16	cyclictest	3327355	-21	unin-run	08:05:01	0
3270539	99	17	14,2	cyclictest	3509612	-21	kworker/u8:0+flush-259:0	11:00:18	3
3270539	99	17	14,2	cyclictest	0	-21	swapper/3	10:40:01	3
3270537	99	17	9,5	cyclictest	3514757	-21	latency_hist	11:05:00	2
3270537	99	17	14,2	cyclictest	3545715	-21	kworker/u8:2+events_unbound	12:03:34	2
3270537	99	17	14,2	cyclictest	3514984	-21	kworker/u8:1+events_unbound	11:07:12	2
3270537	99	17	14,2	cyclictest	3441254	-21	kworker/u8:2+events_unbound	10:05:10	2
3270537	99	17	10,5	cyclictest	3535413	-21	latency_hist	11:25:00	2
3270536	99	17	14,2	cyclictest	3509612	-21	kworker/u8:0+flush-259:0	11:04:02	1
3270536	99	17	14,2	cyclictest	3327361	-21	kworker/u8:0+flush-259:0	08:30:17	1
3270536	99	17	11,4	cyclictest	3488700	-21	cp	10:40:00	1
3270532	99	17	14,2	cyclictest	3462520	-21	kworker/u8:4+flush-259:0	10:35:13	0
3270532	99	17	14,2	cyclictest	3420640	-21	kworker/u8:2+events_unbound	09:40:20	0
3270532	99	17	14,2	cyclictest	3400242	-21	kworker/u8:1+flush-259:0	09:25:26	0
3270532	99	17	14,2	cyclictest	3400242	-21	kworker/u8:1+flush-259:0	09:25:25	0
3270532	99	17	14,2	cyclictest	3250162	-21	kworker/u8:4+events_unbound	07:20:13	0
3270532	99	17	13,3	cyclictest	3581745	-21	kworker/u8:3+events_unbound	12:36:48	0
3270532	99	17	12,3	cyclictest	3555994	-21	kworker/u8:3+flush-259:0	12:00:16	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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