OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Wed Apr 29, 2026 00:44:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3488625	2	56	0,3	chrt	37	1	rcuc/2	20:56:13	2
3519465	2	55	0,5	chrt	28	1	rcuc/1	21:26:16	1
3379097	99	53	44,6	cyclictest	3535163	-21	latency_hist	21:45:00	1
3379097	99	52	42,6	cyclictest	280	-21	systemd-journal	22:15:00	1
3379100	99	51	38,10	cyclictest	3484491	-21	ntpq	20:51:17	2
3379097	99	51	45,4	cyclictest	3406086	-21	kworker/u8:1+flush-8:0	19:51:06	1
3379097	99	51	42,6	cyclictest	3405626	-21	apt-get	19:35:00	1
3379095	99	50	40,7	cyclictest	280	-21	systemd-journal	23:31:22	0
3379095	99	49	37,9	cyclictest	3439765	-21	ntpq	20:06:14	0
3379095	99	48	37,9	cyclictest	280	-21	systemd-journal	22:40:01	0
3379097	99	47	41,5	cyclictest	3568190	-21	kworker/u8:3+events_unbound	22:16:21	1
3379097	99	47	41,5	cyclictest	3568190	-21	kworker/u8:3+events_unbound	22:16:21	1
3379095	99	47	37,8	cyclictest	3440540	-21	kworker/u8:2+flush-8:0	20:16:10	0
3379095	99	47	37,8	cyclictest	3440540	-21	kworker/u8:2+flush-8:0	20:16:09	0
3379100	99	46	39,4	cyclictest	3500413	-21	kworker/u8:2+flush-8:0	21:16:09	2
3379097	99	46	42,3	cyclictest	3639677	-21	kworker/u8:0+flush-8:0	00:06:16	1
3379097	99	46	41,4	cyclictest	2005899	-21	kworker/u8:3+flush-8:0	19:36:21	1
3379097	99	45	39,4	cyclictest	3440540	-21	kworker/u8:2+flush-8:0	20:21:07	1
3379097	99	44	37,5	cyclictest	3658466	-21	kworker/u8:1+flush-8:0	23:46:22	1
3379097	99	44	36,6	cyclictest	3659555	-21	/usr/sbin/munin	23:51:20	1
3379097	99	42	35,5	cyclictest	3440540	-21	kworker/u8:2+flush-8:0	20:36:20	1
3379097	99	42	34,6	cyclictest	280	-21	systemd-journal	00:02:44	1
3379097	99	42	33,7	cyclictest	280	-21	systemd-journal	21:35:00	1
3379095	99	42	33,7	cyclictest	280	-21	systemd-journal	20:12:10	0
3379097	99	41	36,4	cyclictest	3406086	-21	kworker/u8:1+events_unbound	20:41:21	1
3379100	99	40	34,4	cyclictest	3500413	-21	kworker/u8:2+flush-8:0	22:26:17	2
3379097	99	40	31,6	cyclictest	280	-21	systemd-journal	21:06:41	1
3379097	99	40	30,8	cyclictest	3559911	-21	apt-get	22:10:00	1
3379095	99	40	36,3	cyclictest	3568190	-21	kworker/u8:3+flush-8:0	23:11:13	0
3379097	99	39	35,3	cyclictest	3406086	-21	kworker/u8:1+flush-8:0	20:26:08	1
3379097	99	39	33,4	cyclictest	3440540	-21	kworker/u8:2+flush-8:0	20:16:08	1
3379097	99	39	33,4	cyclictest	3440540	-21	kworker/u8:2+flush-8:0	20:16:08	1
3379097	99	38	34,3	cyclictest	2544827	-21	kworker/u8:2+flush-8:0	19:21:07	1
3379097	99	38	33,3	cyclictest	2005899	-21	kworker/u8:3+flush-8:0	21:01:21	1
3379095	99	38	33,3	cyclictest	2005899	-21	kworker/u8:3+flush-8:0	19:36:09	0
3379097	99	37	32,4	cyclictest	3406086	-21	kworker/u8:1+flush-8:0	20:11:19	1
3379097	99	37	31,4	cyclictest	3693982	-21	kworker/u8:1+flush-8:0	00:26:07	1
3379097	99	37	31,4	cyclictest	3480722	-21	apt-get	20:51:02	1
3379095	99	37	32,4	cyclictest	3595257	-21	kworker/u8:1+flush-8:0	22:51:15	0
3379095	99	37	32,4	cyclictest	3568190	-21	kworker/u8:3+flush-8:0	23:36:14	0
3379097	99	36	30,4	cyclictest	3568190	-21	kworker/u8:3+flush-8:0	22:56:14	1
3379095	99	36	30,4	cyclictest	3500413	-21	kworker/u8:2+events_unbound	23:16:22	0
3379095	99	36	29,5	cyclictest	3470489	-21	latency_hist	20:40:01	0
3379095	99	36	26,8	cyclictest	3633677	-21	ntpq	23:21:17	0
3379100	99	35	30,4	cyclictest	3440540	-21	kworker/u8:2+flush-8:0	20:31:18	2
3379097	99	35	31,3	cyclictest	3678609	-21	kworker/u8:3+events_unbound	00:21:13	1
3379097	99	35	31,3	cyclictest	3678609	-21	kworker/u8:3+events_unbound	00:21:13	1
3379097	99	35	30,3	cyclictest	3500413	-21	kworker/u8:2+flush-8:0	00:11:23	1
3379095	99	35	27,6	cyclictest	280	-21	systemd-journal	21:15:00	0
3379100	99	34	28,4	cyclictest	3406086	-21	kworker/u8:1+flush-8:0	19:55:31	2
3379095	99	34	28,4	cyclictest	2544827	-21	kworker/u8:2+flush-8:0	19:26:20	0
3379095	99	34	0,30	cyclictest	3565078	-21	true	22:14:59	0
3374266	2	34	4,9	sleep1	0	-21	swapper/1	19:05:04	1
3379097	99	33	29,3	cyclictest	3500413	-21	kworker/u8:2+events_unbound	22:31:19	1
3379097	99	33	27,5	cyclictest	3568190	-21	kworker/u8:3+events_unbound	23:06:06	1
3379095	99	33	25,6	cyclictest	3544720	-21	unixbench_singl	21:51:21	0
3379095	99	33	22,8	cyclictest	3663397	-21	ntpq	23:51:16	0
3379100	99	32	24,6	cyclictest	280	-21	systemd-journal	21:55:00	2
3379097	99	32	28,3	cyclictest	3568190	-21	kworker/u8:3+flush-8:0	22:36:15	1
3379097	99	32	28,3	cyclictest	2544827	-21	kworker/u8:2+flush-8:0	19:26:22	1
3379097	99	32	27,4	cyclictest	3595257	-21	kworker/u8:1+flush-8:0	22:51:21	1
3379097	99	32	26,5	cyclictest	2005899	-21	kworker/u8:3+events_unbound	19:16:19	1
3379097	99	32	26,4	cyclictest	280	-21	systemd-journal	23:14:43	1
3379095	99	32	27,4	cyclictest	3639677	-21	kworker/u8:0+flush-8:0	00:31:08	0
3379095	99	32	27,4	cyclictest	3568190	-21	kworker/u8:3+flush-8:0	23:01:21	0
3379095	99	32	26,5	cyclictest	3475099	-21	unixbench_singl	20:41:23	0
3379095	99	32	25,6	cyclictest	3658888	-21	unixbench_multi	23:46:24	0
3379100	99	31	27,3	cyclictest	3544260	-21	kworker/u8:1+events_unbound	22:01:27	2
3379100	99	31	26,4	cyclictest	3406086	-21	kworker/u8:1+flush-8:0	21:06:51	2
3379100	99	31	25,4	cyclictest	3624265	-21	unixbench_multi	23:11:22	2
3379097	99	31	27,3	cyclictest	3568190	-21	kworker/u8:3+events_unbound	23:41:07	1
3379097	99	31	26,3	cyclictest	3640497	-21	irqrtprio	23:31:10	1
3379095	99	31	27,3	cyclictest	3406086	-21	kworker/u8:1+flush-8:0	19:54:12	0
3379095	99	31	27,3	cyclictest	3406086	-21	kworker/u8:1+events_unbound	20:02:00	0
3379095	99	31	27,3	cyclictest	3406086	-21	kworker/u8:1+events_unbound	20:02:00	0
3379095	99	31	27,3	cyclictest	2005899	-21	kworker/u8:3+flush-8:0	19:56:08	0
3379095	99	31	26,4	cyclictest	2005899	-21	kworker/u8:3+events_unbound	19:15:03	0
3379095	99	31	24,6	cyclictest	3599649	-21	unixbench_singl	22:46:24	0
3379100	99	30	24,4	cyclictest	3410545	-21	journal-offline	19:36:23	2
3379097	99	30	27,2	cyclictest	3635066	-21	cpuspeed_turbos	23:26:03	1
3379097	99	30	26,3	cyclictest	3625679	-21	irqrtprio	23:16:11	1
3379097	99	30	26,3	cyclictest	3595257	-21	kworker/u8:1+flush-8:0	23:21:07	1
3379097	99	30	25,4	cyclictest	3500413	-21	kworker/u8:2+flush-8:0	21:36:18	1
3379097	99	30	25,4	cyclictest	2005899	-21	kworker/u8:3+events_unbound	21:25:01	1
3379097	99	30	24,4	cyclictest	3658466	-21	kworker/u8:1+flush-8:0	23:56:10	1
3379097	99	30	23,5	cyclictest	3435701	-21	cron	20:05:00	1
3379097	99	30	23,5	cyclictest	3435701	-21	cron	20:05:00	1
3379097	99	30	18,9	cyclictest	280	-21	systemd-journal	23:37:43	1
3379097	99	30	16,4	cyclictest	3406086	-21	kworker/u8:1+events_unbound	20:59:46	1
3379095	99	30	25,4	cyclictest	3658466	-21	kworker/u8:1+flush-8:0	00:06:13	0
3379095	99	30	25,4	cyclictest	3524872	-21	kworker/u8:0+events_unbound	22:16:05	0
3379095	99	30	25,4	cyclictest	3524872	-21	kworker/u8:0+events_unbound	22:16:05	0
3379095	99	30	25,4	cyclictest	3406086	-21	kworker/u8:1+flush-8:0	20:21:19	0
3379095	99	30	24,5	cyclictest	3688678	-21	unixbench_singl	00:16:22	0
3379095	99	30	24,4	cyclictest	3654005	-21	unixbench_singl	23:41:23	0
3379095	99	30	23,5	cyclictest	3406086	-21	kworker/u8:1+events_unbound	20:56:17	0
3379095	99	30	23,5	cyclictest	3405620	-21	latency_hist	19:35:01	0
3379100	99	29	26,2	cyclictest	3619380	-21	unixbench_singl	23:06:23	2
3379100	99	29	25,3	cyclictest	3406086	-21	kworker/u8:1+events_unbound	20:46:25	2
3379100	99	29	25,3	cyclictest	2005899	-21	kworker/u8:3+flush-8:0	20:01:13	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17