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 Fri Aug 07, 2026 12:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1611655	2	370	0,3	sleep3	575	-21	kworker/3:2+events	12:27:56	3
1294527	99	133	125,6	cyclictest	1460272	-21	gpgv	09:55:00	2
1294519	99	77	59,16	cyclictest	1460285	-21	sed	09:55:00	0
1294522	99	69	66,2	cyclictest	0	-21	swapper/1	09:55:00	1
1481652	2	63	0,1	sleep2	1481655	-21	kthreadcore	10:17:56	2
1547448	2	60	0,6	sleep2	0	-21	swapper/2	11:22:55	2
1512035	2	57	0,6	chrt	0	-21	swapper/2	10:47:56	2
1606636	2	56	0,2	sleep2	1606639	-21	kthreadcore	12:22:57	2
1294522	99	52	43,7	cyclictest	1306954	-21	/usr/sbin/munin	07:23:04	1
1294527	99	50	40,7	cyclictest	275	-21	systemd-journal	09:15:00	2
1392233	2	49	0,5	chrt	0	-21	swapper/3	08:47:52	3
1294522	99	49	45,3	cyclictest	1609907	-21	kworker/u8:0+flush-8:0	12:37:52	1
1294522	99	49	45,3	cyclictest	1609907	-21	kworker/u8:0+flush-8:0	12:37:51	1
1294519	99	49	44,4	cyclictest	1559911	-21	kworker/u8:2+events_unbound	11:43:05	0
1294522	99	47	42,3	cyclictest	1430614	-21	kworker/u8:1+events_unbound	09:35:01	1
1294522	99	46	41,4	cyclictest	1496243	-21	kworker/u8:3+flush-8:0	11:38:05	1
1294522	99	45	34,9	cyclictest	275	-21	systemd-journal	11:10:00	1
1294522	99	43	37,4	cyclictest	1585152	-21	kworker/u8:1+events_unbound	12:28:07	1
1294519	99	42	34,6	cyclictest	1395765	-21	latency_hist	08:50:01	0
1294522	99	41	37,3	cyclictest	1460498	-21	kworker/u8:1+events_unbound	10:17:54	1
1294522	99	41	34,6	cyclictest	4130059	-21	kworker/u8:3+flush-8:0	08:13:09	1
1294519	99	41	33,6	cyclictest	1360915	-21	latency_hist	08:15:01	0
1294522	99	40	35,3	cyclictest	1460498	-21	kworker/u8:1+flush-8:0	11:23:05	1
1294522	99	40	34,4	cyclictest	4130059	-21	kworker/u8:3+events_unbound	08:25:00	1
1294522	99	40	34,4	cyclictest	1360938	-21	kworker/u8:2+flush-8:0	09:27:55	1
1294522	99	39	34,4	cyclictest	1559911	-21	kworker/u8:2+events_unbound	11:47:58	1
1294522	99	39	32,5	cyclictest	1525102	-21	kworker/u8:0+flush-8:0	11:57:54	1
1294522	99	39	31,6	cyclictest	1365878	-21	latency_hist	08:20:01	1
1294519	99	39	34,3	cyclictest	1440269	-21	cron	09:35:00	0
1294519	99	39	31,6	cyclictest	1554722	-21	latency_hist	11:30:01	0
1289692	2	39	26,10	sleep2	0	-21	swapper/2	07:05:12	2
1294527	99	38	32,4	cyclictest	1539666	-21	apt-get	11:15:03	2
1294522	99	38	33,4	cyclictest	1460498	-21	kworker/u8:1+events_unbound	10:25:01	1
1294522	99	38	33,3	cyclictest	1366135	-21	kworker/u8:0+flush-8:0	09:02:50	1
1294522	99	38	28,8	cyclictest	1385182	-21	ntpq	08:38:00	1
1294522	99	38	28,8	cyclictest	1385182	-21	ntpq	08:38:00	1
1294519	99	38	32,4	cyclictest	1299394	-21	gpgv	07:15:01	0
1294522	99	37	32,4	cyclictest	1470179	-21	kworker/u8:2+flush-8:0	10:58:04	1
1294522	99	37	29,6	cyclictest	1415527	-21	latency_hist	09:10:01	1
1294296	2	37	4,9	sleep1	0	-21	swapper/1	07:09:25	1
1294522	99	36	32,3	cyclictest	1460498	-21	kworker/u8:1+events_unbound	10:27:50	1
1294522	99	36	31,4	cyclictest	1496243	-21	kworker/u8:3+events_unbound	11:27:50	1
1294522	99	36	31,3	cyclictest	1410585	-21	kworker/u8:1+flush-8:0	09:12:49	1
1294522	99	36	27,6	cyclictest	1336252	-21	latency_hist	07:50:01	1
1294519	99	36	31,4	cyclictest	1366135	-21	kworker/u8:0+flush-8:0	09:17:51	0
1294519	99	36	28,6	cyclictest	1509966	-21	latency_hist	10:45:01	0
1294519	99	36	27,7	cyclictest	1575202	-21	/usr/sbin/munin	11:52:59	0
1294527	99	35	26,7	cyclictest	1580130	-21	cp	11:55:01	2
1294527	99	35	26,7	cyclictest	1371266	-21	cp	08:25:01	2
1294522	99	35	31,2	cyclictest	1426602	-21	irqrtprio	09:22:51	1
1294522	99	35	30,4	cyclictest	1595032	-21	kworker/u8:2+events_unbound	12:13:01	1
1294522	99	35	28,5	cyclictest	1525102	-21	kworker/u8:0+flush-8:0	11:18:00	1
1294519	99	35	26,6	cyclictest	1594803	-21	latency_hist	12:10:01	0
1294519	99	35	24,2	cyclictest	16	1	rcu_preempt	09:02:58	0
1294522	99	34	29,4	cyclictest	1460498	-21	kworker/u8:1+events_unbound	10:47:51	1
1294522	99	34	28,5	cyclictest	1430621	-21	kworker/u8:4+flush-8:0	09:43:01	1
1294522	99	34	26,6	cyclictest	1609640	-21	latency_hist	12:25:01	1
1294519	99	34	30,3	cyclictest	4130059	-21	kworker/u8:3+flush-8:0	07:33:05	0
1294519	99	34	29,3	cyclictest	1600759	-21	irqcore	12:17:52	0
1294519	99	34	27,5	cyclictest	1560146	-21	apt-get	11:37:47	0
1294522	99	33	29,3	cyclictest	1460498	-21	kworker/u8:1+events_unbound	10:02:51	1
1294522	99	33	29,2	cyclictest	1337060	-21	cut	07:52:50	1
1294522	99	33	28,4	cyclictest	1301707	-21	kworker/u8:1+flush-8:0	07:17:51	1
1294522	99	33	23,8	cyclictest	1424770	-21	ntpq	09:18:02	1
1294522	99	32	26,5	cyclictest	1366135	-21	kworker/u8:0+flush-8:0	08:43:02	1
1294522	99	32	25,5	cyclictest	1294856	-21	/usr/sbin/munin	07:13:04	1
1294522	99	32	24,6	cyclictest	1460498	-21	kworker/u8:1+flush-8:0	10:42:59	1
1294519	99	32	28,2	cyclictest	1385898	-21	turbostat.cron	08:40:00	0
1294519	99	32	28,2	cyclictest	1385898	-21	turbostat.cron	08:40:00	0
1294519	99	32	22,8	cyclictest	1455077	-21	latency_hist	09:50:00	0
1294522	99	31	27,2	cyclictest	1453600	-21	kthreadcore	09:47:56	1
1294522	99	31	26,4	cyclictest	1470179	-21	kworker/u8:2+events_unbound	10:52:49	1
1294522	99	31	26,3	cyclictest	1331562	-21	kworker/u8:1+events_unbound	08:08:02	1
1294522	99	31	16,3	cyclictest	0	-21	swapper/1	10:12:48	1
1294519	99	31	27,2	cyclictest	1584902	-21	idleruntime-cro	12:00:01	0
1294519	99	31	26,3	cyclictest	1496243	-21	kworker/u8:3+events_unbound	11:23:04	0
1294519	99	31	25,5	cyclictest	1460498	-21	kworker/u8:1+flush-8:0	10:33:05	0
1294519	99	31	25,4	cyclictest	1460498	-21	kworker/u8:1+events_unbound	11:13:05	0
1294519	99	31	22,7	cyclictest	1380964	-21	latency_hist	08:35:00	0
1294519	99	31	21,7	cyclictest	1475557	-21	/usr/sbin/munin	10:13:00	0
1294527	99	30	25,3	cyclictest	1395342	-21	grep	08:48:03	2
1294527	99	30	24,4	cyclictest	1327050	-21	cpuspeed_turbos	07:42:50	2
1294522	99	30	26,3	cyclictest	1585152	-21	kworker/u8:1+flush-8:0	12:33:05	1
1294522	99	30	26,3	cyclictest	1585152	-21	kworker/u8:1+flush-8:0	12:33:05	1
1294522	99	30	25,4	cyclictest	1430621	-21	kworker/u8:4+flush-8:0	09:37:58	1
1294522	99	30	25,3	cyclictest	1366135	-21	kworker/u8:0+flush-8:0	08:47:49	1
1294522	99	30	25,3	cyclictest	0	-21	swapper/1	12:10:00	1
1294522	99	30	24,5	cyclictest	1496243	-21	kworker/u8:3+flush-8:0	12:03:01	1
1294522	99	30	23,5	cyclictest	1460498	-21	kworker/u8:1+flush-8:0	10:38:06	1
1294522	99	30	22,6	cyclictest	4130059	-21	kworker/u8:3+flush-8:0	08:57:59	1
1294519	99	30	24,4	cyclictest	1585152	-21	kworker/u8:1+events_unbound	12:32:56	0
1294519	99	30	24,4	cyclictest	1585152	-21	kworker/u8:1+events_unbound	12:32:56	0
1294527	99	29	25,2	cyclictest	1474863	-21	unixbench_multi	10:08:06	2
1294527	99	29	24,3	cyclictest	1620524	-21	fschecks_count	12:37:51	2
1294527	99	29	24,3	cyclictest	1620524	-21	fschecks_count	12:37:51	2
1294527	99	29	23,4	cyclictest	1406205	-21	aten2_r5power_v	09:02:47	2
1294522	99	29	24,4	cyclictest	1559911	-21	kworker/u8:2+flush-8:0	11:52:55	1
1294522	99	29	24,3	cyclictest	1460498	-21	kworker/u8:1+events_unbound	10:32:59	1
1294522	99	29	23,5	cyclictest	1366135	-21	kworker/u8:0+flush-8:0	08:53:06	1
1294522	99	29	22,4	cyclictest	1316188	-21	unixbench_multi	07:28:08	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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