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 Sat Mar 21, 2026 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3003297	99	43	39,3	cyclictest	3274636	-21	apt-get	11:30:10	0
3003297	99	40	36,3	cyclictest	3311121	-21	apt-get	12:05:11	0
3003307	99	38	34,3	cyclictest	3211783	-21	gpgv	10:30:00	3
3003300	99	38	32,4	cyclictest	3311095	-21	/usr/sbin/munin	12:05:14	1
3003303	99	37	33,3	cyclictest	3013791	-21	gpgv	07:20:01	2
3003300	99	36	31,4	cyclictest	3035241	-21	kworker/u8:0+events_unbound	09:05:14	1
3003297	99	36	32,3	cyclictest	3238117	-21	apt-get	10:55:14	0
3003303	99	33	28,4	cyclictest	3108124	-21	apt-get	08:50:12	2
3003300	99	33	28,3	cyclictest	3160350	-21	kworker/u8:2+events_unbound	10:25:14	1
3003297	99	33	29,3	cyclictest	3160350	-21	kworker/u8:2+flush-259:0	10:20:17	0
3003303	99	32	27,3	cyclictest	3159731	-21	cat	09:39:55	2
3003297	99	32	28,3	cyclictest	3160350	-21	kworker/u8:2+flush-259:0	10:15:17	0
3003297	99	32	26,5	cyclictest	3189672	-21	ntpq	10:05:20	0
3003303	99	31	26,4	cyclictest	3170280	-21	apt-get	09:50:10	2
3003300	99	31	24,5	cyclictest	3274372	-21	latency_hist	11:30:02	1
3003303	99	30	26,3	cyclictest	3248131	-21	kworker/u8:1+flush-259:0	11:10:25	2
3003303	99	30	23,5	cyclictest	3279690	-21	cat	11:35:01	2
3003300	99	30	27,2	cyclictest	3035241	-21	kworker/u8:0+flush-259:0	07:50:26	1
3003300	99	30	26,3	cyclictest	3050940	-21	kworker/u8:3+flush-259:0	08:10:16	1
3003300	99	30	26,3	cyclictest	3050940	-21	kworker/u8:3+events_unbound	08:05:14	1
3003300	99	30	25,3	cyclictest	3295684	-21	apt-get	11:50:11	1
3003307	99	28	22,4	cyclictest	252	-21	systemd-journal	11:20:01	3
3003300	99	28	24,2	cyclictest	3160015	-21	apt-get	09:40:10	1
3003300	99	28	22,4	cyclictest	3077167	-21	cat	08:20:01	1
3003300	99	27	23,3	cyclictest	3336814	-21	apt-get	12:30:12	1
3003300	99	27	23,3	cyclictest	2988195	-21	kworker/u8:1+flush-259:0	07:10:16	1
3003300	99	27	19,5	cyclictest	3118086	-21	latency_hist	09:00:00	1
3003297	99	27	20,5	cyclictest	3013567	-21	apt-get	07:20:00	0
3003300	99	25	21,3	cyclictest	3118134	-21	kworker/u8:3+flush-259:0	09:20:23	1
3003300	99	25	20,3	cyclictest	3118328	-21	/usr/sbin/munin	09:00:22	1
3003307	99	24	21,2	cyclictest	3019149	-21	kworker/u8:2+flush-259:0	07:45:00	3
3003300	99	24	20,3	cyclictest	3035241	-21	kworker/u8:0+flush-259:0	10:05:16	1
3003300	99	24	19,3	cyclictest	3035241	-21	kworker/u8:0+flush-259:0	11:40:22	1
3003300	99	23	19,3	cyclictest	3258502	-21	kworker/u8:2+events_unbound	11:25:01	1
3003300	99	23	19,3	cyclictest	3076601	-21	kworker/u8:2+events_unbound	08:40:25	1
3003300	99	23	17,4	cyclictest	3201629	-21	/usr/sbin/munin	10:20:15	1
3003297	99	23	17,4	cyclictest	3212514	-21	diskstats	10:30:14	0
3003297	99	23	17,4	cyclictest	3045452	-21	gpgv	07:50:01	0
3003307	99	22	18,3	cyclictest	3035241	-21	kworker/u8:0+flush-259:0	11:55:16	3
3003303	99	22	18,3	cyclictest	3118134	-21	kworker/u8:3+flush-259:0	09:15:23	2
3003300	99	22	19,2	cyclictest	3118134	-21	kworker/u8:3+flush-259:0	09:35:24	1
3003300	99	22	18,3	cyclictest	3035241	-21	kworker/u8:0+flush-259:0	10:00:24	1
3003300	99	22	16,4	cyclictest	3102917	-21	/usr/sbin/munin	08:45:23	1
3003300	99	22	16,4	cyclictest	3071685	-21	apt-get	08:15:10	1
3003297	99	22	17,4	cyclictest	3263723	-21	gpgv	11:20:00	0
3003297	99	22	16,4	cyclictest	3305672	-21	latency_hist	12:00:01	0
3003297	99	22	1,20	cyclictest	1	-21	systemd	10:13:54	0
3003307	99	21	17,3	cyclictest	3295402	-21	kworker/u8:2+flush-259:0	12:00:25	3
3003307	99	21	17,3	cyclictest	3238082	-21	kworker/u8:4+flush-259:0	11:00:00	3
3003300	99	21	17,3	cyclictest	3295402	-21	kworker/u8:2+events_unbound	12:29:55	1
3003300	99	21	17,3	cyclictest	3160350	-21	kworker/u8:2+events_unbound	10:15:24	1
3003300	99	21	17,3	cyclictest	3035241	-21	kworker/u8:0+flush-259:0	10:40:19	1
3003300	99	21	17,3	cyclictest	3035241	-21	kworker/u8:0+flush-259:0	10:10:21	1
3003300	99	21	17,3	cyclictest	2988195	-21	kworker/u8:1+flush-259:0	07:25:17	1
3003300	99	21	16,4	cyclictest	3295402	-21	kworker/u8:2+events_unbound	12:11:03	1
3003300	99	21	16,4	cyclictest	2988195	-21	kworker/u8:1+events_unbound	07:35:22	1
3003300	99	21	16,3	cyclictest	252	-21	systemd-journal	09:25:02	1
3003297	99	21	19,1	cyclictest	3143869	-21	systemd-run	09:25:00	0
3003297	99	21	18,2	cyclictest	3118134	-21	kworker/u8:3+flush-259:0	09:15:14	0
3003297	99	21	14,5	cyclictest	3169111	-21	ntpq	09:45:21	0
3003307	99	20	17,2	cyclictest	3316019	-21	kworker/u8:1+events_unbound	12:25:18	3
3003307	99	20	17,2	cyclictest	2971	-21	cron	09:50:01	3
3003307	99	20	15,3	cyclictest	509	-21	rs:main		3
3003303	99	20	17,2	cyclictest	3160350	-21	kworker/u8:2+flush-259:0	10:20:26	2
3003303	99	20	17,2	cyclictest	3035241	-21	kworker/u8:0+flush-259:0	10:25:18	2
3003303	99	20	16,3	cyclictest	3243274	-21	apt-get	11:00:11	2
3003300	99	20	16,3	cyclictest	3035241	-21	kworker/u8:0+events_unbound	08:54:55	1
3003300	99	20	15,3	cyclictest	3253564	-21	apt-get	11:10:11	1
3003297	99	20	16,3	cyclictest	3316019	-21	kworker/u8:1+flush-259:0	12:15:24	0
3003297	99	20	13,5	cyclictest	3040194	-21	latency_hist	07:45:01	0
3003297	99	20	13,5	cyclictest	252	-21	systemd-journal	08:17:54	0
3003307	99	19	15,3	cyclictest	3316260	-21	apt-get	12:10:12	3
3003307	99	19	15,3	cyclictest	3112980	-21	turbostat	08:59:55	3
3003307	99	19	14,4	cyclictest	3101798	-21	ntpq	08:40:21	3
3003303	99	19	16,2	cyclictest	3326284	-21	cron	12:19:59	2
3003303	99	19	15,3	cyclictest	509	-21	rs:main		2
3003303	99	19	15,3	cyclictest	3035241	-21	kworker/u8:0+flush-259:0	09:20:24	2
3003303	99	19	14,4	cyclictest	3305938	-21	apt-get	12:00:10	2
3003303	99	19	13,4	cyclictest	3008432	-21	latency_hist	07:15:01	2
3003300	99	19	17,2	cyclictest	3019149	-21	kworker/u8:2+flush-259:0	07:55:25	1
3003300	99	19	15,3	cyclictest	3076601	-21	kworker/u8:2+events_unbound	08:31:55	1
3003300	99	19	15,3	cyclictest	3035241	-21	kworker/u8:0+flush-259:0	10:50:20	1
3003300	99	19	15,3	cyclictest	3035241	-21	kworker/u8:0+events_unbound	09:55:00	1
3003297	99	19	16,2	cyclictest	3316019	-21	kworker/u8:1+events_unbound	12:10:16	0
3003297	99	19	16,2	cyclictest	3076601	-21	kworker/u8:2+flush-259:0	08:45:16	0
3003297	99	19	15,3	cyclictest	3050940	-21	kworker/u8:3+flush-259:0	08:05:01	0
3003297	99	19	15,3	cyclictest	2988195	-21	kworker/u8:1+flush-259:0	07:25:16	0
3003297	99	19	13,5	cyclictest	3340779	-21	ntpq	12:30:22	0
3003307	99	18	14,3	cyclictest	3232663	-21	latency_hist	10:50:00	3
3003307	99	18	13,4	cyclictest	3051159	-21	apt-get	07:55:12	3
3003307	99	18	12,5	cyclictest	3284228	-21	ntpq	11:35:20	3
3003303	99	18	15,2	cyclictest	2988195	-21	kworker/u8:1+flush-259:0	07:20:15	2
3003303	99	18	13,4	cyclictest	3227526	-21	latency_hist	10:45:00	2
3003303	99	18	12,4	cyclictest	3330569	-21	ntpq	12:20:22	2
3003300	99	18	15,2	cyclictest	3238082	-21	kworker/u8:4+flush-259:0	11:00:11	1
3003300	99	18	15,2	cyclictest	3035241	-21	kworker/u8:0+events_unbound	07:45:14	1
3003300	99	18	14,3	cyclictest	3295402	-21	kworker/u8:2+events_unbound	12:35:23	1
3003300	99	18	14,3	cyclictest	3279759	-21	kworker/u8:1+events_unbound	11:46:03	1
3003300	99	18	14,3	cyclictest	3035241	-21	kworker/u8:0+events_unbound	11:38:55	1
3003300	99	18	13,3	cyclictest	3248131	-21	kworker/u8:1+events_unbound	11:05:13	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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