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 Tue May 19, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3032704	99	48	40,5	cyclictest	3272711	-21	latency_hist	11:00:00	0
3032712	99	43	39,3	cyclictest	3058476	-21	kworker/u8:1+flush-259:0	08:00:01	2
3032714	99	41	33,5	cyclictest	3355704	-21	latency_hist	12:20:01	3
3032707	99	40	36,3	cyclictest	3277865	-21	kworker/u8:1+events_unbound	11:10:01	1
3032712	99	35	31,3	cyclictest	3210777	-21	kworker/u8:2+flush-259:0	10:05:21	2
3032712	99	34	31,2	cyclictest	3355931	-21	kworker/u8:4+flush-259:0	12:35:00	2
3032712	99	34	31,2	cyclictest	3303711	-21	kworker/u8:0+flush-259:0	12:00:16	2
3032712	99	34	29,4	cyclictest	3189713	-21	latency_hist	09:40:00	2
3032714	99	32	26,4	cyclictest	3267996	-21	diskstats	10:55:15	3
3032712	99	32	29,2	cyclictest	3184801	-21	kworker/u8:1+events_unbound	09:40:22	2
3032712	99	32	28,3	cyclictest	3277865	-21	kworker/u8:1+events_unbound	11:25:21	2
3032707	99	32	26,4	cyclictest	3043399	-21	latency_hist	07:20:01	1
3032712	99	31	28,2	cyclictest	3210992	-21	kworker/u8:3+flush-259:0	10:25:21	2
3032712	99	30	27,2	cyclictest	4077320	-21	kworker/u8:3+events_unbound	07:10:18	2
3032712	99	30	27,2	cyclictest	3101028	-21	kworker/u8:4+flush-259:0	09:35:01	2
3032707	99	30	25,3	cyclictest	3329465	-21	latency_hist	11:55:00	1
3032714	99	28	22,4	cyclictest	3226273	-21	latency_hist	10:15:01	3
3032712	99	28	25,2	cyclictest	3137517	-21	kworker/u8:5+events_unbound	09:10:17	2
3032712	99	28	24,3	cyclictest	3210992	-21	kworker/u8:3+flush-259:0	10:30:22	2
3032707	99	28	24,3	cyclictest	3226499	-21	kworker/u8:4+flush-259:0	10:20:21	1
3032704	99	28	21,5	cyclictest	335557	-21	systemd-journal	11:55:00	0
3032704	99	28	1,25	cyclictest	1	-21	systemd	12:30:54	0
3032714	99	27	21,4	cyclictest	3101028	-21	kworker/u8:4+flush-259:0	08:30:01	3
3032714	99	27	20,5	cyclictest	3130997	-21	ntpq	08:40:20	3
3032712	99	27	24,2	cyclictest	3137517	-21	kworker/u8:5+flush-259:0	10:00:01	2
3032707	99	27	23,3	cyclictest	335557	-21	systemd-journal	09:42:56	1
3032704	99	27	22,3	cyclictest	3278088	-21	/usr/sbin/munin	11:05:15	0
3032714	99	26	20,4	cyclictest	3231465	-21	latency_hist	10:20:01	3
3032714	99	26	19,5	cyclictest	3236642	-21	latency_hist	10:25:00	3
3032712	99	26	21,4	cyclictest	3360954	-21	latency_hist	12:25:00	2
3032714	99	25	21,3	cyclictest	3058476	-21	kworker/u8:1+flush-259:0	08:15:17	3
3032712	99	25	22,2	cyclictest	3293546	-21	kworker/u8:4+flush-259:0	11:35:16	2
3032712	99	25	21,3	cyclictest	3226499	-21	kworker/u8:4+events_unbound	10:58:57	2
3032714	99	24	19,3	cyclictest	3334643	-21	apt-get	12:00:01	3
3032714	99	24	17,5	cyclictest	3350555	-21	latency_hist	12:15:01	3
3032712	99	24	20,3	cyclictest	3257309	-21	kworker/u8:1+flush-259:0	10:48:57	2
3032707	99	24	21,2	cyclictest	3111328	-21	kworker/u8:2+events_unbound	08:28:55	1
3032707	99	24	20,3	cyclictest	335557	-21	systemd-journal	10:44:56	1
3032707	99	24	20,3	cyclictest	3080188	-21	/usr/sbin/munin	07:55:16	1
3032707	99	24	19,4	cyclictest	3209918	-21	ntpq	09:55:23	1
3032712	99	23	20,2	cyclictest	3210992	-21	kworker/u8:3+events_unbound	10:35:22	2
3032712	99	23	20,2	cyclictest	3132560	-21	kworker/u8:0+flush-259:0	09:50:17	2
3032712	99	23	20,2	cyclictest	3121813	-21	kworker/u8:3+flush-259:0	08:55:25	2
3032712	99	23	20,2	cyclictest	3058476	-21	kworker/u8:1+events_unbound	08:30:12	2
3032712	99	23	19,3	cyclictest	3267798	-21	kworker/u8:2+events_unbound	11:05:15	2
3032712	99	23	18,3	cyclictest	3293317	-21	latency_hist	11:20:01	2
3032707	99	23	18,4	cyclictest	3169276	-21	cat	09:20:01	1
3032704	99	23	17,4	cyclictest	3090273	-21	apt-get	08:05:01	0
3032714	99	22	19,2	cyclictest	4166533	-21	kworker/u8:2+flush-259:0	07:40:22	3
3032712	99	22	18,3	cyclictest	3058476	-21	kworker/u8:1+events_unbound	08:22:57	2
3032712	99	22	16,4	cyclictest	3376382	-21	latency_hist	12:39:59	2
3032712	99	22	16,4	cyclictest	3079523	-21	latency_hist	07:55:00	2
3032707	99	22	19,2	cyclictest	3058476	-21	kworker/u8:1+events_unbound	08:30:16	1
3032707	99	22	18,3	cyclictest	3226499	-21	kworker/u8:4+events_unbound	10:28:52	1
3032707	99	22	16,4	cyclictest	335557	-21	systemd-journal	12:13:55	1
3032704	99	22	7,5	cyclictest	3163918	-21	diskstats	09:15:14	0
3032704	99	22	15,5	cyclictest	3184573	-21	latency_hist	09:35:00	0
3032714	99	21	15,4	cyclictest	3313953	-21	latency_hist	11:40:01	3
3032714	99	21	14,5	cyclictest	335557	-21	systemd-journal	07:20:01	3
3032712	99	21	18,2	cyclictest	3210777	-21	kworker/u8:2+flush-259:0	10:05:00	2
3032712	99	21	18,2	cyclictest	3132560	-21	kworker/u8:0+events_unbound	09:45:18	2
3032712	99	21	18,2	cyclictest	3132560	-21	kworker/u8:0+events_unbound	08:45:18	2
3032712	99	21	18,2	cyclictest	3058476	-21	kworker/u8:1+flush-259:0	08:00:15	2
3032712	99	21	17,3	cyclictest	3303917	-21	kworker/u8:3+events_unbound	12:10:56	2
3032707	99	21	18,2	cyclictest	3319344	-21	kworker/u8:2+events_unbound	11:59:08	1
3032707	99	21	18,2	cyclictest	3303711	-21	kworker/u8:0+flush-259:0	11:45:24	1
3032707	99	21	18,2	cyclictest	3058476	-21	kworker/u8:1+flush-259:0	08:45:58	1
3032707	99	21	17,3	cyclictest	3137517	-21	kworker/u8:5+events_unbound	09:13:58	1
3032707	99	21	17,3	cyclictest	3132560	-21	kworker/u8:0+events_unbound	09:50:57	1
3032707	99	21	15,4	cyclictest	3334664	-21	http	12:00:01	1
3032704	99	21	16,3	cyclictest	335557	-21	systemd-journal	10:10:55	0
3032704	99	21	16,3	cyclictest	3252346	-21	/usr/sbin/munin	10:40:18	0
3032704	99	21	0,19	cyclictest	1	-21	systemd	12:15:54	0
3032714	99	20	15,4	cyclictest	507	-21	in:imuxsock	07:50:01	3
3032714	99	20	15,3	cyclictest	3126623	-21	journal-offline	08:38:33	3
3032714	99	20	15,3	cyclictest	3126623	-21	journal-offline	08:38:32	3
3032714	99	20	14,4	cyclictest	3308825	-21	cron	11:35:00	3
3032712	99	20	17,2	cyclictest	3293546	-21	kworker/u8:4+events_unbound	11:44:54	2
3032712	99	20	17,2	cyclictest	3293546	-21	kworker/u8:4+events_unbound	11:30:18	2
3032712	99	20	17,2	cyclictest	3277865	-21	kworker/u8:1+flush-259:0	11:55:21	2
3032712	99	20	17,2	cyclictest	3027755	-21	kworker/u8:4+events_unbound	07:30:18	2
3032712	99	20	16,3	cyclictest	4166533	-21	kworker/u8:2+events_unbound	07:38:21	2
3032712	99	20	16,3	cyclictest	3226499	-21	kworker/u8:4+events_unbound	10:20:15	2
3032707	99	20	17,2	cyclictest	3303711	-21	kworker/u8:0+events_unbound	11:44:05	1
3032707	99	20	16,3	cyclictest	3277865	-21	kworker/u8:1+events_unbound	11:25:16	1
3032707	99	20	16,3	cyclictest	3210992	-21	kworker/u8:3+events_unbound	10:15:56	1
3032707	99	20	14,4	cyclictest	3169068	-21	cp	09:20:00	1
3032704	99	20	14,4	cyclictest	3334643	-21	apt-get	12:00:01	0
3032704	99	20	13,5	cyclictest	3266674	-21	ntpq	10:50:21	0
3032714	99	19	14,3	cyclictest	3277865	-21	kworker/u8:1+flush-259:0	11:25:16	3
3032714	99	19	14,3	cyclictest	3267798	-21	kworker/u8:2+flush-259:0	11:10:00	3
3032714	99	19	14,3	cyclictest	3184833	-21	apt-get	09:35:11	3
3032714	99	19	12,5	cyclictest	3168683	-21	latency_hist	09:20:01	3
3032712	99	19	17,2	cyclictest	3101028	-21	kworker/u8:4+events_unbound	09:15:22	2
3032712	99	19	16,2	cyclictest	3048771	-21	kworker/u8:0+flush-259:0	07:45:25	2
3032712	99	19	15,3	cyclictest	3355931	-21	kworker/u8:4+events_unbound	12:25:57	2
3032712	99	19	15,3	cyclictest	3101028	-21	kworker/u8:4+events_unbound	09:05:19	2
3032707	99	19	16,2	cyclictest	3132560	-21	kworker/u8:0+flush-259:0	09:48:45	1
3032707	99	19	16,2	cyclictest	3132560	-21	kworker/u8:0+flush-259:0	08:50:15	1
3032707	99	19	16,2	cyclictest	3132560	-21	kworker/u8:0+events_unbound	10:03:48	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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