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 May 23, 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
3328674	99	36	28,6	cyclictest	3384798	-21	ntpq	08:00:23	0
3328685	99	35	30,3	cyclictest	3620911	-21	kworker/u8:1+flush-259:0	11:50:17	3
3328683	99	33	28,3	cyclictest	3422017	-21	/usr/sbin/munin	08:40:15	2
3328674	99	33	27,4	cyclictest	3339182	-21	latency_hist	07:20:01	0
3328685	99	32	28,3	cyclictest	3344341	-21	kworker/u8:2+flush-259:0	07:40:17	3
3328685	99	32	26,4	cyclictest	509	-21	rs:main		3
3328674	99	32	28,3	cyclictest	3636488	-21	kworker/u8:2+flush-259:0	12:15:16	0
3328674	99	32	28,3	cyclictest	3552837	-21	gpgv	10:45:01	0
3328685	99	31	27,3	cyclictest	3510513	-21	kworker/u8:2+events_unbound	10:30:01	3
3328685	99	31	25,4	cyclictest	3463483	-21	kworker/u8:3+flush-259:0	09:49:59	3
3328674	99	30	28,1	cyclictest	3568876	-21	kworker/0:2+pm	11:27:07	0
3328685	99	29	26,2	cyclictest	3531349	-21	kworker/u8:0+flush-259:0	10:40:00	3
3328683	99	29	18,9	cyclictest	335557	-21	systemd-journal	10:30:00	2
3328685	99	28	23,3	cyclictest	3553464	-21	kworker/u8:1+flush-259:0	11:10:00	3
3328683	99	28	13,6	cyclictest	0	-21	swapper/2	07:40:00	2
3328685	99	27	21,4	cyclictest	3515875	-21	diskstats	10:10:13	3
3328679	99	27	21,4	cyclictest	335557	-21	systemd-journal	10:45:01	1
3328674	99	27	22,4	cyclictest	3339454	-21	apt-get	07:20:12	0
3328674	99	27	21,5	cyclictest	3573358	-21	ntpq	11:00:20	0
3328685	99	26	23,2	cyclictest	3579406	-21	kworker/u8:2+flush-259:0	11:11:08	3
3328679	99	26	13,4	cyclictest	3630164	-21	ntp_kernel_pll_	11:55:21	1
3328685	99	25	21,3	cyclictest	3479160	-21	kworker/u8:1+flush-259:0	09:50:18	3
3328683	99	25	19,4	cyclictest	3401081	-21	latency_hist	08:20:01	2
3328679	99	25	19,4	cyclictest	3569117	-21	latency_hist	11:00:01	1
3328674	99	25	19,4	cyclictest	335557	-21	systemd-journal	12:10:00	0
3328683	99	24	19,3	cyclictest	3531417	-21	cp	10:25:00	2
3328683	99	24	14,9	cyclictest	500	-21	systemd-logind	11:27:08	2
3328679	99	24	18,4	cyclictest	3536897	-21	latency_hist	10:30:01	1
3328674	99	24	17,5	cyclictest	3353829	-21	ntpq	07:30:22	0
3328685	99	23	19,3	cyclictest	3636488	-21	kworker/u8:2+flush-259:0	12:25:00	3
3328685	99	23	19,3	cyclictest	3426957	-21	kworker/u8:1+flush-259:0	08:55:21	3
3328685	99	23	18,3	cyclictest	3579406	-21	kworker/u8:2+events_unbound	11:20:18	3
3328685	99	23	17,4	cyclictest	3666610	-21	ntpq	12:30:22	3
3328685	99	23	17,4	cyclictest	3666610	-21	ntpq	12:30:22	3
3328685	99	23	17,4	cyclictest	3553464	-21	kworker/u8:1+flush-259:0	10:55:17	3
3328683	99	23	0,13	cyclictest	3467672	-21	ntp_kernel_err	09:20:21	2
3328685	99	22	19,2	cyclictest	3508791	-21	kworker/u8:1+flush-259:0	10:00:26	3
3328685	99	22	19,2	cyclictest	3508791	-21	kworker/u8:1+flush-259:0	10:00:25	3
3328685	99	22	18,3	cyclictest	3426957	-21	kworker/u8:1+events_unbound	08:45:23	3
3328685	99	22	17,4	cyclictest	3370023	-21	kworker/u8:3+events_unbound	08:40:22	3
3328685	99	22	17,3	cyclictest	3463483	-21	kworker/u8:3+events_unbound	09:25:24	3
3328685	99	22	16,4	cyclictest	3641439	-21	latency_hist	12:10:00	3
3328683	99	22	19,2	cyclictest	507	-21	in:imuxsock	08:15:00	2
3328679	99	22	18,3	cyclictest	3558402	-21	apt-get	10:49:59	1
3328674	99	22	18,3	cyclictest	3390998	-21	apt-get	08:10:13	0
3328674	99	22	17,4	cyclictest	3411719	-21	apt-get	08:30:12	0
3328674	99	22	16,5	cyclictest	3467691	-21	ntpq	09:20:21	0
3328685	99	21	18,2	cyclictest	3323297	-21	kworker/u8:2+flush-259:0	07:15:00	3
3328685	99	21	17,3	cyclictest	3579406	-21	kworker/u8:2+events_unbound	11:40:22	3
3328685	99	21	17,3	cyclictest	3489417	-21	kworker/u8:0+events_unbound	10:15:20	3
3328685	99	21	16,4	cyclictest	3457631	-21	kworker/u8:0+flush-259:0	09:20:00	3
3328685	99	21	16,3	cyclictest	3531349	-21	kworker/u8:0+flush-259:0	11:00:16	3
3328685	99	21	16,3	cyclictest	3499763	-21	kworker/u8:4+events_unbound	12:25:13	3
3328683	99	21	17,3	cyclictest	3323297	-21	kworker/u8:2+flush-259:0	07:10:16	2
3328679	99	21	16,4	cyclictest	335557	-21	systemd-journal	09:55:28	1
3328674	99	21	19,1	cyclictest	3370023	-21	kworker/u8:3+events_unbound	08:45:18	0
3328674	99	21	18,2	cyclictest	3620911	-21	kworker/u8:1+events_unbound	12:10:20	0
3328674	99	21	15,4	cyclictest	3574522	-21	/usr/sbin/munin	11:05:14	0
3328674	99	21	14,4	cyclictest	3349457	-21	latency_hist	07:30:00	0
3328685	99	20	16,3	cyclictest	3426957	-21	kworker/u8:1+events_unbound	09:00:18	3
3328685	99	20	15,3	cyclictest	3344341	-21	kworker/u8:2+flush-259:0	07:35:40	3
3328685	99	20	14,4	cyclictest	3334035	-21	kworker/u8:1+flush-259:0	07:29:55	3
3328683	99	20	16,3	cyclictest	3531349	-21	kworker/u8:0+flush-259:0	10:30:18	2
3328683	99	20	1,17	cyclictest	3421766	-21	awk	08:40:00	2
3328674	99	20	16,3	cyclictest	3457631	-21	kworker/u8:0+flush-259:0	09:25:14	0
3328674	99	20	13,5	cyclictest	335557	-21	systemd-journal	10:49:07	0
3328685	99	19	17,1	cyclictest	3334035	-21	kworker/u8:1+events_unbound	07:55:24	3
3328685	99	19	16,2	cyclictest	3616217	-21	irqcore	11:45:16	3
3328685	99	19	16,2	cyclictest	187307	-21	kworker/u8:0+flush-259:0	07:15:15	3
3328685	99	19	15,3	cyclictest	3531349	-21	kworker/u8:0+flush-259:0	10:50:56	3
3328685	99	19	15,3	cyclictest	3370023	-21	kworker/u8:3+flush-259:0	08:05:23	3
3328685	99	19	15,3	cyclictest	187307	-21	kworker/u8:0+flush-259:0	07:20:26	3
3328685	99	19	14,4	cyclictest	3636488	-21	kworker/u8:2+events_unbound	12:15:12	3
3328685	99	19	12,5	cyclictest	3499763	-21	kworker/u8:4+flush-259:0	11:35:17	3
3328683	99	19	4,6	cyclictest	3662240	-21	munin-run	12:30:00	2
3328683	99	19	17,1	cyclictest	3589713	-21	cron	11:20:00	2
3328683	99	19	15,3	cyclictest	3553373	-21	gpgv	10:45:00	2
3328683	99	19	15,3	cyclictest	3499763	-21	kworker/u8:4+flush-259:0	12:05:00	2
3328683	99	19	0,9	cyclictest	3386277	-21	cat	08:05:17	2
3328679	99	19	14,3	cyclictest	3427181	-21	apt-get	08:45:11	1
3328674	99	19	16,2	cyclictest	3426957	-21	kworker/u8:1+events_unbound	08:55:23	0
3328674	99	19	15,3	cyclictest	3626149	-21	/usr/sbin/munin	11:55:19	0
3328674	99	19	15,3	cyclictest	3432293	-21	kworker/u8:2+flush-259:0	09:40:20	0
3328674	99	19	15,3	cyclictest	187307	-21	kworker/u8:0+flush-259:0	07:55:00	0
3328674	99	19	14,3	cyclictest	3636488	-21	kworker/u8:2+flush-259:0	12:35:00	0
3328674	99	19	14,3	cyclictest	3636488	-21	kworker/u8:2+flush-259:0	12:34:59	0
3328674	99	19	14,3	cyclictest	3401310	-21	kworker/u8:2+flush-259:0	08:25:21	0
3328674	99	19	13,4	cyclictest	335557	-21	systemd-journal	07:14:59	0
3328674	99	19	0,18	cyclictest	1	-21	systemd	10:00:29	0
3328674	99	19	0,18	cyclictest	1	-21	systemd	10:00:28	0
3328685	99	18	14,3	cyclictest	3631083	-21	kworker/u8:0+events_unbound	12:01:03	3
3328685	99	18	14,3	cyclictest	3499763	-21	kworker/u8:4+events_unbound	11:15:16	3
3328685	99	18	14,3	cyclictest	3370023	-21	kworker/u8:3+events_unbound	08:23:05	3
3328685	99	18	13,3	cyclictest	3380658	-21	kworker/u8:4+flush-259:0	08:05:01	3
3328685	99	18	12,4	cyclictest	3631083	-21	kworker/u8:0+flush-259:0	12:36:10	3
3328683	99	18	1,15	cyclictest	3457836	-21	awk	09:15:01	2
3328683	99	18	10,6	cyclictest	0	-21	swapper/2	09:50:21	2
3328683	99	18	0,17	cyclictest	3328682	-21	cat	07:10:01	2
3328683	99	18	0,10	cyclictest	3478740	-21	taskset	09:32:58	2
3328679	99	18	13,4	cyclictest	3334020	-21	latency_hist	07:15:00	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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