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 Thu Apr 09, 2026 00:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3245992	2	196	0,3	sleep3	75	-21	kworker/3:1-events	21:06:25	3
3344640	2	89	0,2	sleep3	47	1	rcuc/3	22:46:21	3
3344640	2	89	0,2	sleep3	47	1	rcuc/3	22:46:21	3
3448981	2	84	0,6	chrt	0	-21	swapper/1	00:30:01	1
3419293	2	68	0,4	sleep3	0	-21	swapper/3	00:00:01	3
3454803	2	60	0,4	sleep3	75	-21	kworker/3:1-events	00:36:25	3
3128835	99	58	51,5	cyclictest	3022356	-21	kworker/u8:4+flush-8:0	19:11:35	1
3128835	99	58	45,9	cyclictest	280	-21	systemd-journal	21:05:01	1
3159840	2	57	0,5	chrt	0	-21	swapper/2	19:36:35	2
3128835	99	57	46,9	cyclictest	280	-21	systemd-journal	19:20:00	1
3128830	99	56	34,18	cyclictest	280	-21	systemd-journal	22:11:20	0
3128830	99	55	38,14	cyclictest	3175181	-21	latency_hist	19:55:01	0
3128835	99	52	47,4	cyclictest	3413912	-21	kworker/u8:3+flush-8:0	00:21:34	1
3128835	99	51	45,4	cyclictest	3264281	-21	kworker/u8:0+events_unbound	21:26:34	1
3128835	99	51	45,4	cyclictest	3215290	-21	kworker/u8:0+events_unbound	21:11:34	1
3128830	99	50	27,21	cyclictest	3194166	-21	ntpq	20:11:31	0
3128830	99	50	20,16	cyclictest	3161654	-21	kthreadcore	19:41:26	0
3128835	99	49	42,5	cyclictest	3234612	-21	kworker/u8:2+flush-8:0	22:31:34	1
3128835	99	48	39,7	cyclictest	3264281	-21	kworker/u8:0+flush-8:0	21:46:36	1
3128830	99	47	41,4	cyclictest	3419384	-21	kworker/u8:4+events_unbound	00:06:20	0
3128830	99	47	30,15	cyclictest	3320261	-21	grep	22:21:24	0
3128835	99	46	41,3	cyclictest	3189742	-21	kworker/u8:3+events_unbound	21:31:21	1
3128835	99	46	40,4	cyclictest	3338197	-21	kworker/u8:0+events_unbound	22:41:22	1
3128835	99	46	40,4	cyclictest	3189742	-21	kworker/u8:3+flush-8:0	20:41:20	1
3128835	99	46	39,5	cyclictest	3444152	-21	kworker/u8:1+flush-8:0	00:31:36	1
3128835	99	46	38,6	cyclictest	3135809	-21	kworker/u8:0+flush-8:0	19:51:35	1
3128835	99	45	41,3	cyclictest	3329100	-21	kworker/u8:1+events_unbound	23:06:34	1
3128835	99	45	39,4	cyclictest	3329100	-21	kworker/u8:1+flush-8:0	23:16:21	1
3128840	99	44	38,4	cyclictest	3199947	-21	gpgv	20:20:00	2
3128835	99	44	38,4	cyclictest	3363766	-21	kworker/u8:3+events_unbound	23:41:19	1
3128835	99	43	37,4	cyclictest	3389419	-21	kworker/u8:1+flush-8:0	00:11:21	1
3128830	99	43	25,15	cyclictest	3359882	-21	irqrtprio	23:01:32	0
3128835	99	42	37,4	cyclictest	3234612	-21	kworker/u8:2+flush-8:0	22:21:31	1
3128835	99	42	36,4	cyclictest	3189742	-21	kworker/u8:3+events_unbound	20:26:20	1
3128835	99	42	33,6	cyclictest	3165339	-21	latency_hist	19:45:01	1
3128830	99	42	2,35	cyclictest	0	-21	swapper/0	22:51:23	0
3128835	99	41	36,4	cyclictest	3293379	-21	kworker/u8:1+events_unbound	22:01:36	1
3128835	99	41	35,4	cyclictest	3379346	-21	kworker/u8:2+events_unbound	23:51:36	1
3128830	99	41	25,14	cyclictest	3285033	-21	fschecks_time	21:46:22	0
3128830	99	41	20,19	cyclictest	3384596	-21	cpuspeed_turbos	23:26:20	0
3128830	99	41	1,5	cyclictest	589	-21	runrttasks	21:51:19	0
3128835	99	40	35,4	cyclictest	3135809	-21	kworker/u8:0+events_unbound	19:56:19	1
3128835	99	40	34,4	cyclictest	3215290	-21	kworker/u8:0+flush-8:0	20:46:31	1
3128835	99	40	31,6	cyclictest	280	-21	systemd-journal	21:06:33	1
3128835	99	39	34,3	cyclictest	3413912	-21	kworker/u8:3+events_unbound	00:16:31	1
3128835	99	39	33,4	cyclictest	3419384	-21	kworker/u8:4+events_unbound	00:06:34	1
3128835	99	39	32,5	cyclictest	3234612	-21	kworker/u8:2+flush-8:0	22:11:30	1
3128835	99	39	30,7	cyclictest	3258681	-21	ntpq	21:16:29	1
3128830	99	39	31,5	cyclictest	3269130	-21	grep	21:26:37	0
3128830	99	39	28,9	cyclictest	3448054	-21	ntpq	00:26:31	0
3128835	99	38	32,4	cyclictest	3234612	-21	kworker/u8:2+flush-8:0	22:36:31	1
3128830	99	38	23,13	cyclictest	3343012	-21	needreboot	22:41:29	0
3128830	99	38	20,15	cyclictest	3304142	-21	latency_hist	22:05:01	0
3128835	99	37	32,3	cyclictest	3155156	-21	kworker/u8:1+events_unbound	20:01:20	1
3128835	99	37	31,5	cyclictest	3234612	-21	kworker/u8:2+flush-8:0	21:36:31	1
3128835	99	37	31,4	cyclictest	3338197	-21	kworker/u8:0+flush-8:0	22:51:38	1
3128835	99	37	31,4	cyclictest	3234612	-21	kworker/u8:2+events_unbound	22:46:30	1
3128835	99	37	31,4	cyclictest	3234612	-21	kworker/u8:2+events_unbound	22:46:30	1
3128835	99	37	31,3	cyclictest	3234612	-21	kworker/u8:2+events_unbound	22:56:24	1
3128835	99	37	30,5	cyclictest	3189742	-21	kworker/u8:3+flush-8:0	20:11:30	1
3128830	99	37	20,15	cyclictest	3279371	-21	cron	21:40:00	0
3128830	99	37	19,16	cyclictest	3433136	-21	ntpq	00:11:29	0
3128830	99	37	19,16	cyclictest	3239467	-21	unixbench_multi	20:56:36	0
3128511	2	37	4,10	sleep1	0	-21	swapper/1	19:08:13	1
3128835	99	36	30,4	cyclictest	3234612	-21	kworker/u8:2+flush-8:0	21:41:19	1
3128835	99	36	26,8	cyclictest	3234057	-21	ntpq	20:51:30	1
3128830	99	36	26,7	cyclictest	280	-21	systemd-journal	20:20:34	0
3128830	99	36	26,7	cyclictest	280	-21	systemd-journal	00:20:00	0
3128835	99	35	30,4	cyclictest	3128688	-21	kworker/u8:2+events_unbound	20:31:31	1
3128835	99	35	30,4	cyclictest	3128688	-21	kworker/u8:2+events_unbound	20:31:31	1
3128835	99	35	29,4	cyclictest	3284043	-21	kworker/u8:3+flush-8:0	22:26:31	1
3128835	99	35	29,4	cyclictest	3284043	-21	kworker/u8:3+flush-8:0	21:56:30	1
3128830	99	35	2,13	cyclictest	3155777	-21	chrt	19:36:17	0
3128830	99	35	0,8	cyclictest	3329928	-21	/usr/sbin/munin	22:31:25	0
3128835	99	34	27,5	cyclictest	3389419	-21	kworker/u8:1+events_unbound	23:46:31	1
3128830	99	34	2,8	cyclictest	583	-21	snmpd	23:11:17	0
3128830	99	34	28,4	cyclictest	3264196	-21	grep	21:21:38	0
3128830	99	34	26,5	cyclictest	3199909	-21	latency_hist	20:20:00	0
3128830	99	34	14,18	cyclictest	3358773	-21	cron	23:00:01	0
3128835	99	33	29,3	cyclictest	3419384	-21	kworker/u8:4+flush-8:0	00:36:33	1
3128835	99	33	29,3	cyclictest	3234612	-21	kworker/u8:2+events_unbound	21:21:35	1
3128835	99	33	28,4	cyclictest	3379346	-21	kworker/u8:2+events_unbound	23:21:28	1
3128835	99	33	27,4	cyclictest	3413912	-21	kworker/u8:3+events_unbound	23:56:30	1
3128830	99	33	25,5	cyclictest	3318973	-21	latency_hist	22:20:01	0
3128830	99	33	18,13	cyclictest	0	-21	swapper/0	23:21:20	0
3128830	99	33	16,15	cyclictest	3308769	-21	unixbench_singl	22:06:37	0
3128830	99	33	13,18	cyclictest	3150458	-21	cron	19:30:00	0
3128830	99	33	1,30	cyclictest	3249717	-21	kworker/0:2+events	21:41:14	0
3128830	99	33	12,19	cyclictest	3189183	-21	ntpq	20:06:30	0
3128830	99	33	12,18	cyclictest	3234858	-21	cron	20:55:00	0
3128830	99	33	1,12	cyclictest	3245107	-21	seq	21:06:18	0
3128830	99	33	11,19	cyclictest	1	-21	systemd	19:20:47	0
3128840	99	32	28,2	cyclictest	3343899	-21	cron	22:45:00	2
3128840	99	32	27,4	cyclictest	3128688	-21	kworker/u8:2+flush-8:0	19:26:35	2
3128835	99	32	27,4	cyclictest	3379346	-21	kworker/u8:2+events_unbound	23:26:20	1
3128830	99	32	1,9	cyclictest	3452947	-21	/usr/sbin/munin	00:31:31	0
3128830	99	32	1,9	cyclictest	3328489	-21	/usr/sbin/munin	22:26:34	0
3128830	99	32	1,8	cyclictest	3443589	-21	/usr/sbin/munin	00:21:36	0
3128830	99	32	1,8	cyclictest	3374526	-21	/usr/sbin/munin	23:16:20	0
3128830	99	32	1,8	cyclictest	3367834	-21	/usr/sbin/munin	23:06:31	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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