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 Sat Aug 08, 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
3353945	2	179	0,2	sleep3	0	-21	swapper/3	20:32:56	3
3303154	2	54	0,5	sleep1	3303152	-21	fschecks_time	19:42:50	1
3270563	99	52	42,7	cyclictest	3376701	-21	latency_hist	20:55:01	1
3270563	99	51	43,5	cyclictest	3555460	-21	apt-get	23:57:45	1
3270556	99	51	46,3	cyclictest	3450978	-21	kworker/u8:2+events_unbound	22:57:47	0
3270556	99	51	44,5	cyclictest	3450978	-21	kworker/u8:2+events_unbound	22:47:46	0
3270556	99	50	45,4	cyclictest	3411612	-21	kworker/u8:1+events_unbound	23:22:50	0
3270556	99	49	45,3	cyclictest	3260607	-21	kworker/u8:2+events_unbound	19:18:04	0
3330395	2	48	0,3	sleep1	28	1	rcuc/1	20:07:54	1
3270556	99	48	43,4	cyclictest	3431197	-21	kworker/u8:0+flush-8:0	23:13:04	0
3489309	2	47	0,2	sleep1	30	-21	ksoftirqd/1	22:47:55	1
3270556	99	47	39,6	cyclictest	3336963	-21	latency_hist	20:15:01	0
3270556	99	46	40,4	cyclictest	3260607	-21	kworker/u8:2+events_unbound	21:30:01	0
3526784	2	44	0,3	sleep3	575	-21	kworker/3:2+events	23:27:53	3
3526784	2	44	0,3	sleep3	575	-21	kworker/3:2+events	23:27:53	3
3270568	99	44	33,8	cyclictest	3460837	-21	cat	22:19:59	2
3270568	99	44	28,15	cyclictest	3362058	-21	base64	20:40:01	2
3270556	99	44	39,4	cyclictest	3270408	-21	kworker/u8:1+events_unbound	19:30:00	0
3270556	99	44	35,7	cyclictest	3311560	-21	ntpq	19:47:55	0
3270556	99	43	37,4	cyclictest	3431197	-21	kworker/u8:0+events_unbound	23:05:01	0
3270563	99	42	31,8	cyclictest	275	-21	systemd-journal	21:25:02	1
3270556	99	42	36,4	cyclictest	3411612	-21	kworker/u8:1+events_unbound	23:27:49	0
3270556	99	42	36,4	cyclictest	3411612	-21	kworker/u8:1+events_unbound	23:27:49	0
3270349	2	42	26,10	sleep1	0	-21	swapper/1	19:09:45	1
3270556	99	41	37,3	cyclictest	3431197	-21	kworker/u8:0+events_unbound	22:52:45	0
3270556	99	40	34,4	cyclictest	3411612	-21	kworker/u8:1+events_unbound	23:48:00	0
3270556	99	40	33,5	cyclictest	3560276	-21	kworker/u8:4+events_unbound	00:02:47	0
3270568	99	39	20,16	cyclictest	3341878	-21	awk	20:20:00	2
3270556	99	39	35,3	cyclictest	3560276	-21	kworker/u8:4+events_unbound	00:17:47	0
3270556	99	39	35,3	cyclictest	3302610	-21	kworker/u8:3+events_unbound	19:58:04	0
3270556	99	39	34,3	cyclictest	3260607	-21	kworker/u8:2+events_unbound	19:23:07	0
3270556	99	39	33,4	cyclictest	3550301	-21	kworker/u8:0+events_unbound	23:52:52	0
3270556	99	39	33,4	cyclictest	3356530	-21	kworker/u8:1+events_unbound	21:07:50	0
3270556	99	39	33,4	cyclictest	275	-21	systemd-journal	21:34:28	0
3270556	99	38	34,3	cyclictest	3302610	-21	kworker/u8:3+flush-8:0	22:07:54	0
3270556	99	38	33,3	cyclictest	3302610	-21	kworker/u8:3+events_unbound	21:58:05	0
3270556	99	38	32,4	cyclictest	3534642	-21	kworker/u8:2+events_unbound	23:38:03	0
3270556	99	38	32,4	cyclictest	3450978	-21	kworker/u8:2+events_unbound	22:12:49	0
3270556	99	38	32,4	cyclictest	3450978	-21	kworker/u8:2+events_unbound	22:12:49	0
3270556	99	38	32,4	cyclictest	3260607	-21	kworker/u8:2+events_unbound	21:47:50	0
3270556	99	38	32,4	cyclictest	3260607	-21	kworker/u8:2+events_unbound	20:18:00	0
3270568	99	37	24,11	cyclictest	3283371	-21	fschecks_time	19:22:51	2
3270563	99	37	28,6	cyclictest	275	-21	systemd-journal	19:24:40	1
3270556	99	37	31,4	cyclictest	3450978	-21	kworker/u8:2+events_unbound	22:23:00	0
3270568	99	36	22,12	cyclictest	3441901	-21	fschecks_time	22:02:50	2
3270568	99	36	21,13	cyclictest	0	-21	swapper/2	21:20:00	2
3270568	99	36	1,28	cyclictest	3317689	-21	apt-get	19:57:48	2
3270563	99	36	28,6	cyclictest	3550503	-21	/usr/sbin/munin	23:53:00	1
3270563	99	36	26,8	cyclictest	3495650	-21	latency_hist	22:55:02	1
3270563	99	36	25,9	cyclictest	3499827	-21	ntpq	22:57:58	1
3270556	99	36	32,3	cyclictest	3411612	-21	kworker/u8:1+flush-8:0	21:43:07	0
3270556	99	36	31,3	cyclictest	3411612	-21	kworker/u8:1+events_unbound	00:28:06	0
3270556	99	36	30,4	cyclictest	3260607	-21	kworker/u8:2+events_unbound	20:43:05	0
3270568	99	35	23,10	cyclictest	3322906	-21	fschecks_count	20:02:50	2
3270568	99	35	2,25	cyclictest	3387114	-21	apt-get	21:07:48	2
3270568	99	35	17,15	cyclictest	3336972	-21	awk	20:15:00	2
3270568	99	35	1,27	cyclictest	3481275	-21	apt-get	22:42:46	2
3270568	99	35	0,19	cyclictest	3509526	-21	/usr/sbin/munin	23:07:56	2
3270563	99	35	28,5	cyclictest	275	-21	systemd-journal	19:27:40	1
3270556	99	35	32,2	cyclictest	3302610	-21	kworker/u8:3+events_unbound	21:53:03	0
3270556	99	35	31,3	cyclictest	3302610	-21	kworker/u8:3+events_unbound	20:28:04	0
3270556	99	35	30,4	cyclictest	3302610	-21	kworker/u8:3+flush-8:0	19:53:05	0
3270556	99	35	30,4	cyclictest	3297292	-21	kworker/u8:0+events_unbound	20:02:57	0
3270556	99	35	29,4	cyclictest	3356530	-21	kworker/u8:1+events_unbound	20:38:04	0
3270556	99	35	29,4	cyclictest	3302610	-21	kworker/u8:3+events_unbound	21:15:00	0
3270556	99	35	29,4	cyclictest	3302610	-21	kworker/u8:3+events_unbound	21:15:00	0
3588615	2	34	0,6	sleep3	45	1	irq_work/3	00:27:56	3
3521340	2	34	0,5	sleep3	45	1	irq_work/3	23:22:52	3
3270568	99	34	21,11	cyclictest	3421102	-21	grep	21:38:05	2
3270563	99	34	24,8	cyclictest	275	-21	systemd-journal	22:05:00	1
3270556	99	34	30,3	cyclictest	3569967	-21	kworker/u8:0+events_unbound	00:12:48	0
3270556	99	34	30,3	cyclictest	3515616	-21	kworker/u8:3+events_unbound	23:17:47	0
3270556	99	34	30,3	cyclictest	3431197	-21	kworker/u8:0+flush-8:0	22:18:04	0
3270556	99	34	30,3	cyclictest	3302610	-21	kworker/u8:3+flush-8:0	21:23:05	0
3270556	99	34	29,4	cyclictest	3569967	-21	kworker/u8:0+events_unbound	00:31:18	0
3270556	99	34	29,4	cyclictest	3569967	-21	kworker/u8:0+events_unbound	00:31:18	0
3270556	99	34	29,3	cyclictest	3356530	-21	kworker/u8:1+events_unbound	21:03:05	0
3270556	99	34	28,5	cyclictest	3534642	-21	kworker/u8:2+flush-8:0	23:42:51	0
3270556	99	34	27,2	cyclictest	3260607	-21	kworker/u8:2+events_unbound	21:16:46	0
3270568	99	33	3,23	cyclictest	3406877	-21	apt-get	21:27:46	2
3270568	99	33	15,15	cyclictest	3312120	-21	unixbench_singl	19:48:03	2
3270568	99	33	1,24	cyclictest	3515842	-21	apt-get	23:17:45	2
3270568	99	33	1,24	cyclictest	3312778	-21	apt-get	19:52:48	2
3270563	99	33	26,5	cyclictest	3426252	-21	latency_hist	21:45:01	1
3270556	99	33	29,3	cyclictest	3450978	-21	kworker/u8:2+flush-8:0	22:42:51	0
3270568	99	32	1,24	cyclictest	3525733	-21	apt-get	23:27:46	2
3270568	99	32	1,24	cyclictest	3525733	-21	apt-get	23:27:46	2
3270556	99	32	28,3	cyclictest	3450978	-21	kworker/u8:2+flush-8:0	22:33:04	0
3270556	99	32	28,3	cyclictest	3260607	-21	kworker/u8:2+events_unbound	20:23:07	0
3270556	99	32	25,5	cyclictest	275	-21	systemd-journal	20:56:46	0
3270556	99	32	24,6	cyclictest	3356530	-21	kworker/u8:1+events_unbound	20:48:00	0
3460238	2	31	0,2	sleep1	16	1	rcu_preempt	22:18:02	1
3270568	99	31	26,3	cyclictest	3511258	-21	fschecks_time	23:12:50	2
3270568	99	31	2,22	cyclictest	3302842	-21	apt-get	19:42:48	2
3270568	99	31	1,23	cyclictest	3287967	-21	apt-get	19:27:46	2
3270563	99	31	26,3	cyclictest	3381723	-21	idleruntime-cro	21:00:00	1
3270556	99	31	27,3	cyclictest	3302610	-21	kworker/u8:3+flush-8:0	20:32:54	0
3270556	99	31	27,3	cyclictest	3302610	-21	kworker/u8:3+events_unbound	21:38:47	0
3270556	99	31	27,3	cyclictest	3297292	-21	kworker/u8:0+flush-8:0	19:43:05	0
3270556	99	31	27,3	cyclictest	3270408	-21	kworker/u8:1+events_unbound	19:33:03	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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