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 Jun 17, 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
3715782	99	57	51,4	cyclictest	3789431	-21	base64	08:20:01	1
3715785	99	48	43,3	cyclictest	3794953	-21	gpgv	08:25:00	2
3715780	99	48	42,5	cyclictest	3805580	-21	latency_hist	08:35:01	0
3715780	99	42	36,4	cyclictest	3950440	-21	latency_hist	10:55:02	0
3715785	99	41	35,4	cyclictest	3736534	-21	cat	07:30:00	2
3715780	99	41	34,5	cyclictest	509	-21	rs:main		0
3715780	99	38	34,3	cyclictest	3959856	-21	kworker/u8:3+flush-259:0	11:05:15	0
3715780	99	38	32,4	cyclictest	3997425	-21	latency_hist	11:40:00	0
3715790	99	37	34,2	cyclictest	3914374	-21	kworker/u8:0+flush-259:0	10:25:00	3
3715780	99	37	30,5	cyclictest	3954742	-21	ntpq	10:55:18	0
3715780	99	36	31,3	cyclictest	3924674	-21	kworker/u8:1+flush-259:0	10:35:00	0
3715785	99	35	28,5	cyclictest	3753280	-21	cp	07:45:01	2
3715785	99	35	28,5	cyclictest	3753280	-21	cp	07:45:01	2
3715785	99	35	25,9	cyclictest	3975860	-21	kworker/u8:4+flush-259:0	11:34:59	2
3715785	99	33	27,4	cyclictest	4038815	-21	latency_hist	12:20:01	2
3715780	99	33	26,5	cyclictest	335557	-21	systemd-journal	11:51:15	0
3715785	99	32	26,4	cyclictest	3956076	-21	diskstats	11:00:14	2
3715780	99	32	29,2	cyclictest	3763623	-21	kworker/u8:4+flush-259:0	08:00:21	0
3715780	99	32	26,4	cyclictest	3795687	-21	diskstats	08:25:15	0
3715785	99	31	21,9	cyclictest	3816137	-21	kworker/u8:0+flush-259:0	09:00:00	2
3715780	99	30	27,2	cyclictest	3965995	-21	kworker/u8:0+flush-259:0	11:10:25	0
3715790	99	29	23,4	cyclictest	3773739	-21	latency_hist	08:05:01	3
3715782	99	29	25,3	cyclictest	4028723	-21	apt-get	12:10:09	1
3715782	99	29	25,3	cyclictest	3853110	-21	sshd	09:20:16	1
3715790	99	28	25,2	cyclictest	3959856	-21	kworker/u8:3+flush-259:0	11:05:00	3
3715785	99	28	23,3	cyclictest	4028451	-21	awk	12:10:00	2
3715780	99	28	25,2	cyclictest	3831406	-21	kworker/u8:2+events_unbound	10:00:17	0
3715780	99	28	25,2	cyclictest	3831406	-21	kworker/u8:2+events_unbound	10:00:17	0
3715780	99	28	24,3	cyclictest	3924675	-21	kworker/u8:2+events_unbound	10:40:18	0
3715780	99	28	24,3	cyclictest	3779424	-21	kworker/u8:1+flush-259:0	08:45:16	0
3715790	99	27	24,2	cyclictest	3975860	-21	kworker/u8:4+flush-259:0	12:30:14	3
3715785	99	27	22,3	cyclictest	3975860	-21	kworker/u8:4+flush-259:0	12:35:16	2
3715782	99	27	24,2	cyclictest	3816137	-21	kworker/u8:0+flush-259:0	08:50:16	1
3715780	99	27	23,3	cyclictest	3914374	-21	kworker/u8:0+flush-259:0	10:45:23	0
3715785	99	26	22,3	cyclictest	3883425	-21	kworker/u8:4+flush-259:0	10:05:16	2
3715785	99	26	20,5	cyclictest	3725208	-21	ntpq	07:15:20	2
3715780	99	26	20,4	cyclictest	3789788	-21	base64	08:20:02	0
3715780	99	26	20,4	cyclictest	3779424	-21	kworker/u8:1+flush-259:0	09:05:17	0
3715790	99	25	22,2	cyclictest	3862081	-21	kworker/u8:3+flush-259:0	09:55:15	3
3715790	99	25	20,4	cyclictest	3831408	-21	kworker/u8:4+flush-259:0	09:10:00	3
3715790	99	25	20,4	cyclictest	335557	-21	systemd-journal	11:35:17	3
3715780	99	25	22,2	cyclictest	3677189	-21	kworker/u8:2+flush-259:0	07:20:20	0
3715780	99	25	21,3	cyclictest	3773760	-21	kworker/u8:0+events_unbound	08:15:21	0
3715780	99	25	20,3	cyclictest	335557	-21	systemd-journal	09:58:16	0
3715780	99	25	17,6	cyclictest	3836580	-21	latency_hist	09:05:01	0
3715790	99	24	19,4	cyclictest	3939259	-21	ntpq	10:40:19	3
3715782	99	24	17,5	cyclictest	3965069	-21	ntpq	11:05:21	1
3715780	99	24	20,3	cyclictest	4033861	-21	kworker/u8:3+events_unbound	12:22:16	0
3715780	99	24	20,3	cyclictest	4028227	-21	kworker/u8:0+events_unbound	12:15:18	0
3715780	99	24	20,3	cyclictest	3831406	-21	kworker/u8:2+events_unbound	09:36:17	0
3715780	99	24	19,3	cyclictest	3742444	-21	base64	07:35:01	0
3715790	99	23	19,3	cyclictest	3971772	-21	/usr/sbin/munin	11:15:13	3
3715782	99	23	19,2	cyclictest	509	-21	rs:main		1
3715780	99	23	19,3	cyclictest	3779424	-21	kworker/u8:1+events_unbound	08:40:23	0
3715780	99	23	19,3	cyclictest	3773760	-21	kworker/u8:0+events_unbound	08:10:27	0
3715785	99	22	18,3	cyclictest	3982145	-21	kworker/u8:1+flush-259:0	11:25:14	2
3715785	99	22	18,3	cyclictest	3657272	-21	kworker/u8:0+flush-259:0	07:10:17	2
3715785	99	22	17,3	cyclictest	3795463	-21	cat	08:25:01	2
3715785	99	22	16,4	cyclictest	3852183	-21	cat	09:20:00	2
3715780	99	22	19,2	cyclictest	3982145	-21	kworker/u8:1+events_unbound	11:30:14	0
3715780	99	22	18,3	cyclictest	3975860	-21	kworker/u8:4+flush-259:0	12:00:24	0
3715780	99	22	18,3	cyclictest	3924675	-21	kworker/u8:2+events_unbound	11:23:18	0
3715780	99	22	18,3	cyclictest	3721132	-21	kworker/u8:4+flush-259:0	07:15:18	0
3715780	99	22	17,4	cyclictest	3862081	-21	kworker/u8:3+flush-259:0	10:10:01	0
3715790	99	21	17,3	cyclictest	3677189	-21	kworker/u8:2+flush-259:0	07:25:25	3
3715790	99	21	17,3	cyclictest	3677189	-21	kworker/u8:2+flush-259:0	07:20:21	3
3715790	99	21	16,4	cyclictest	3789275	-21	apt-get	08:20:01	3
3715790	99	21	15,4	cyclictest	3778038	-21	ntpq	08:05:23	3
3715785	99	21	18,2	cyclictest	3831406	-21	kworker/u8:2+flush-259:0	10:05:00	2
3715785	99	21	18,2	cyclictest	3831406	-21	kworker/u8:2+flush-259:0	10:05:00	2
3715782	99	21	18,2	cyclictest	3924674	-21	kworker/u8:1+flush-259:0	11:00:24	1
3715782	99	21	18,2	cyclictest	3831406	-21	kworker/u8:2+events_unbound	09:55:00	1
3715782	99	21	18,2	cyclictest	3721132	-21	kworker/u8:4+flush-259:0	07:20:00	1
3715782	99	21	17,3	cyclictest	3747749	-21	apt-get	07:40:11	1
3715780	99	21	18,2	cyclictest	3862081	-21	kworker/u8:3+events_unbound	10:15:20	0
3715780	99	21	18,2	cyclictest	3862081	-21	kworker/u8:3+events_unbound	09:41:18	0
3715780	99	21	18,2	cyclictest	3746997	-21	kworker/u8:2+flush-259:0	07:45:22	0
3715780	99	21	18,2	cyclictest	3746997	-21	kworker/u8:2+flush-259:0	07:45:22	0
3715780	99	21	17,3	cyclictest	4033861	-21	kworker/u8:3+flush-259:0	12:30:23	0
3715780	99	21	17,3	cyclictest	3924674	-21	kworker/u8:1+events_unbound	10:35:26	0
3715780	99	21	17,3	cyclictest	3731464	-21	apt-get	07:25:11	0
3715780	99	21	17,3	cyclictest	3657272	-21	kworker/u8:0+events_unbound	07:13:26	0
3715780	99	21	14,5	cyclictest	3923772	-21	ntpq	10:25:21	0
3715790	99	20	17,2	cyclictest	3721132	-21	kworker/u8:4+flush-259:0	07:35:18	3
3715790	99	20	16,3	cyclictest	3992466	-21	kworker/u8:3+flush-259:0	12:05:25	3
3715790	99	20	16,3	cyclictest	3831406	-21	kworker/u8:2+flush-259:0	09:50:00	3
3715790	99	20	16,3	cyclictest	3831406	-21	kworker/u8:2+flush-259:0	09:25:00	3
3715790	99	20	14,4	cyclictest	3965972	-21	latency_hist	11:10:01	3
3715785	99	20	6,6	cyclictest	3893770	-21	awk	10:00:00	2
3715785	99	20	17,2	cyclictest	3746998	-21	kworker/u8:3+flush-259:0	07:50:23	2
3715785	99	20	16,2	cyclictest	3909231	-21	idleruntime-cro	10:15:01	2
3715785	99	20	14,4	cyclictest	3997657	-21	/usr/sbin/munin	11:40:13	2
3715782	99	20	17,2	cyclictest	3831657	-21	apt-get	09:00:12	1
3715782	99	20	16,3	cyclictest	3800652	-21	kworker/u8:3+flush-259:0	08:30:21	1
3715780	99	20	17,2	cyclictest	3831406	-21	kworker/u8:2+flush-259:0	09:15:15	0
3715780	99	20	16,3	cyclictest	3975860	-21	kworker/u8:4+events_unbound	11:59:18	0
3715780	99	20	16,3	cyclictest	3779424	-21	kworker/u8:1+events_unbound	08:35:14	0
3715790	99	19	16,2	cyclictest	3992466	-21	kworker/u8:3+flush-259:0	11:50:21	3
3715790	99	19	16,2	cyclictest	3795053	-21	kworker/u8:2+flush-259:0	08:35:22	3
3715785	99	19	13,4	cyclictest	3767669	-21	ntpq	07:55:20	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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