OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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

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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 792 highest latencies:

System rackeslot6s.osadl.org (updated Fri May 01, 2026 12:44:51)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3882489	99	64	5,40	cyclictest	0	-21	swapper/1	10:35:01	1
3882488	99	61	5,17	cyclictest	208	50	irq/208-8000000.ethernet	09:50:01	0
3882488	99	56	1,25	cyclictest	15	-21	rcuc/0	08:25:01	0
3882489	99	55	39,12	cyclictest	23	1	ktimers/1	08:45:12	1
3882491	99	54	1,33	cyclictest	0	-21	swapper/2	07:35:01	2
3882489	99	54	47,4	cyclictest	3893799	-21	munin-plugin-st	08:15:00	1
3882489	99	54	47,4	cyclictest	23	1	ktimers/1	11:40:01	1
3882489	99	54	33,16	cyclictest	23	1	ktimers/1	07:30:15	1
3882488	99	54	41,9	cyclictest	1283	-21	cron	11:45:01	0
3882488	99	54	2,4	cyclictest	3938040	-21	tail	12:30:28	0
3882489	99	53	43,6	cyclictest	3926162	-21	munin-plugin-st	11:25:00	1
3882488	99	52	44,4	cyclictest	1673	50	irq/118-8000000.ethernet-tx0	11:00:17	0
3882488	99	52	44,4	cyclictest	1673	50	irq/118-8000000.ethernet-tx0	11:00:17	0
3882488	99	52	27,21	cyclictest	206	50	irq/252-8000000.ethernet	10:35:01	0
3882488	99	51	27,20	cyclictest	197	50	irq/27-20000000.i2c	07:55:14	0
3882491	99	50	37,8	cyclictest	31	1	ktimers/2	11:10:10	2
3882491	99	50	34,11	cyclictest	0	-21	swapper/2	09:25:01	2
3882491	99	50	34,11	cyclictest	0	-21	swapper/2	09:25:00	2
3882488	99	49	43,4	cyclictest	3882482	-21	cyclictest	10:30:00	0
3882488	99	49	41,4	cyclictest	1673	50	irq/118-8000000.ethernet-tx0	09:40:21	0
3882491	99	48	34,9	cyclictest	0	-21	swapper/2	11:40:01	2
3882489	99	48	38,7	cyclictest	23	1	ktimers/1	07:45:12	1
3882489	99	48	2,16	cyclictest	0	-21	swapper/1	09:30:02	1
3882488	99	48	37,8	cyclictest	3908015	-21	ptp4l	09:35:27	0
3882488	99	48	37,8	cyclictest	3908015	-21	ptp4l	09:35:27	0
3882491	99	47	5,19	cyclictest	30	-21	rcuc/2	10:25:01	2
3882489	99	47	10,20	cyclictest	23	1	ktimers/1	10:30:01	1
3882491	99	46	39,5	cyclictest	31	1	ktimers/2	10:35:03	2
3882491	99	46	33,10	cyclictest	3898021	-21	sendmail	08:39:59	2
3882488	99	46	25,19	cyclictest	0	-21	swapper/0	12:35:25	0
3882491	99	45	16,15	cyclictest	31	1	ktimers/2	08:45:12	2
3882489	99	45	35,5	cyclictest	0	-21	swapper/1	12:00:00	1
3882489	99	45	34,8	cyclictest	3929535	-21	grep	11:40:28	1
3882488	99	45	6,6	cyclictest	0	-21	swapper/0	09:25:01	0
3882488	99	45	6,6	cyclictest	0	-21	swapper/0	09:25:01	0
3882488	99	45	39,3	cyclictest	1673	50	irq/118-8000000.ethernet-tx0	11:15:12	0
3882488	99	45	2,6	cyclictest	3911273	-21	meminfo	09:55:22	0
3882491	99	44	33,8	cyclictest	3894649	-21	sendmail	08:20:00	2
3882489	99	44	35,5	cyclictest	0	-21	swapper/1	08:00:28	1
3882489	99	44	18,13	cyclictest	3882482	-21	cyclictest	08:35:12	1
3882488	99	44	7,7	cyclictest	3884604	-21	rm	07:20:01	0
3882488	99	44	7,7	cyclictest	3884604	-21	rm	07:20:01	0
3882488	99	44	39,3	cyclictest	0	-21	swapper/0	11:30:16	0
3882488	99	44	35,6	cyclictest	3935611	-21	sh	12:20:00	0
3882488	99	44	33,6	cyclictest	1673	50	irq/118-8000000.ethernet-tx0	08:00:28	0
3882488	99	44	2,5	cyclictest	3920243	-21	munin-run	10:50:00	0
3882488	99	44	2,39	cyclictest	0	-21	swapper/0	10:20:00	0
3882488	99	44	2,39	cyclictest	0	-21	swapper/0	10:20:00	0
3882491	99	43	26,11	cyclictest	0	-21	swapper/2	07:35:24	2
3882489	99	43	36,4	cyclictest	14	-21	rcu_preempt	09:05:21	1
3882489	99	43	34,5	cyclictest	3891264	-21	cat	08:00:00	1
3882489	99	43	30,9	cyclictest	0	-21	swapper/1	12:05:28	1
3882489	99	43	27,11	cyclictest	3936364	-21	grep	12:20:28	1
3882488	99	43	36,4	cyclictest	1673	50	irq/118-8000000.ethernet-tx0	10:55:23	0
3882488	99	43	36,4	cyclictest	1673	50	irq/118-8000000.ethernet-tx0	09:15:23	0
3882488	99	43	36,4	cyclictest	1673	50	irq/118-8000000.ethernet-tx0	07:30:16	0
3882491	99	42	27,11	cyclictest	3930661	-21	/usr/sbin/munin	11:50:18	2
3882491	99	42	27,11	cyclictest	3930661	-21	/usr/sbin/munin	11:50:18	2
3882489	99	42	4,2	cyclictest	0	-21	swapper/1	12:35:00	1
3882489	99	42	35,5	cyclictest	14	-21	rcu_preempt	10:40:18	1
3882488	99	42	36,3	cyclictest	1673	50	irq/118-8000000.ethernet-tx0	11:25:11	0
3882488	99	42	2,9	cyclictest	0	-21	swapper/0	11:40:01	0
3882488	99	42	29,9	cyclictest	0	-21	swapper/0	11:55:20	0
3882488	99	42	2,4	cyclictest	0	-21	swapper/0	08:26:51	0
3882488	99	42	2,3	cyclictest	3898606	-21	ps	08:40:27	0
3882488	99	42	1,2	cyclictest	0	-21	swapper/0	09:05:00	0
3882491	99	41	31,5	cyclictest	0	-21	swapper/2	08:55:27	2
3882491	99	41	29,8	cyclictest	0	-21	swapper/2	11:25:27	2
3882491	99	41	10,14	cyclictest	3907599	-21	/usr/sbin/munin	09:35:19	2
3882491	99	41	10,14	cyclictest	3907599	-21	/usr/sbin/munin	09:35:19	2
3882489	99	41	29,8	cyclictest	3925312	-21	sendmail	11:20:00	1
3882488	99	41	37,2	cyclictest	0	-21	swapper/0	11:20:11	0
3882488	99	41	34,4	cyclictest	208	50	irq/208-8000000.ethernet	10:10:01	0
3882488	99	41	33,4	cyclictest	1673	50	irq/118-8000000.ethernet-tx0	10:55:01	0
3882488	99	41	27,12	cyclictest	13	1	ktimers/0	08:50:11	0
3882488	99	41	1,5	cyclictest	3896798	-21	irqstats	08:30:22	0
3882488	99	41	1,5	cyclictest	3896798	-21	irqstats	08:30:22	0
3882488	99	41	1,38	cyclictest	0	-21	swapper/0	07:35:15	0
3882488	99	41	1,35	cyclictest	0	-21	swapper/0	12:00:02	0
3882491	99	40	7,9	cyclictest	0	-21	swapper/2	10:35:01	2
3882491	99	40	28,8	cyclictest	0	-21	swapper/2	12:20:28	2
3882491	99	40	27,8	cyclictest	0	-21	swapper/2	07:45:29	2
3882491	99	40	23,9	cyclictest	0	-21	swapper/2	10:05:27	2
3882491	99	40	23,10	cyclictest	0	-21	swapper/2	07:20:01	2
3882491	99	40	23,10	cyclictest	0	-21	swapper/2	07:20:01	2
3882491	99	40	1,35	cyclictest	0	-21	swapper/2	09:30:02	2
3882489	99	40	4,3	cyclictest	0	-21	swapper/1	07:15:02	1
3882489	99	40	32,5	cyclictest	0	-21	swapper/1	07:20:26	1
3882489	99	40	32,4	cyclictest	14	-21	rcu_preempt	10:15:19	1
3882489	99	40	32,4	cyclictest	14	-21	rcu_preempt	10:15:18	1
3882489	99	40	3,13	cyclictest	24	-21	ksoftirqd/1	09:35:00	1
3882489	99	40	18,8	cyclictest	23	1	ktimers/1	07:15:12	1
3882489	99	40	18,8	cyclictest	23	1	ktimers/1	07:15:12	1
3882488	99	40	26,9	cyclictest	0	-21	swapper/0	08:55:25	0
3882488	99	40	26,11	cyclictest	13	1	ktimers/0	10:35:13	0
3882488	99	40	2,5	cyclictest	0	-21	swapper/0	07:40:13	0
3882488	99	40	1,37	cyclictest	0	-21	swapper/0	08:10:26	0
3882488	99	40	1,36	cyclictest	3909597	-21	memory	09:45:26	0
3882488	99	40	1,36	cyclictest	0	-21	swapper/0	08:15:22	0
3882491	99	39	29,5	cyclictest	0	-21	swapper/2	07:55:25	2
3882491	99	39	26,8	cyclictest	0	-21	swapper/2	12:25:28	2
3882491	99	39	26,8	cyclictest	0	-21	swapper/2	12:25:28	2
3882489	99	39	8,8	cyclictest	3882482	1	cyclictest	11:45:13	1
3882489	99	39	32,5	cyclictest	14	-21	rcu_preempt	09:15:20	1
3882489	99	39	28,7	cyclictest	0	-21	swapper/1	10:50:25	1
3882489	99	39	28,6	cyclictest	0	-21	swapper/1	09:00:01	1
3882489	99	39	25,9	cyclictest	0	-21	swapper/1	12:10:28	1
3882489	99	39	25,9	cyclictest	0	-21	swapper/1	10:10:28	1
3882489	99	39	20,13	cyclictest	23	1	ktimers/1	09:55:10	1
3882488	99	39	33,4	cyclictest	13	1	ktimers/0	08:45:14	0
3882488	99	39	3,31	cyclictest	3907296	-21	grep	09:30:28	0
3882488	99	39	30,5	cyclictest	1673	50	irq/118-8000000.ethernet-tx0	12:10:27	0
3882488	99	39	2,5	cyclictest	1660	-21	snmpd	11:13:40	0
3882488	99	39	24,11	cyclictest	0	-21	swapper/0	07:25:27	0
3882488	99	39	1,9	cyclictest	0	-21	swapper/0	10:45:00	0
3882488	99	39	1,36	cyclictest	0	-21	swapper/0	09:25:05	0
3882488	99	39	1,36	cyclictest	0	-21	swapper/0	07:10:21	0
3882491	99	38	27,7	cyclictest	0	-21	swapper/2	09:15:28	2
3882491	99	38	27,6	cyclictest	0	-21	swapper/2	09:10:16	2
3882491	99	38	25,6	cyclictest	0	-21	swapper/2	08:30:01	2
3882489	99	38	30,4	cyclictest	0	-21	swapper/1	12:15:27	1
3882489	99	38	29,4	cyclictest	0	-21	swapper/1	08:15:29	1
3882489	99	38	27,7	cyclictest	23	1	ktimers/1	07:25:26	1
3882488	99	38	33,3	cyclictest	15	-21	rcuc/0	10:25:01	0
3882488	99	38	32,3	cyclictest	0	-21	swapper/0	10:00:26	0
3882488	99	38	1,4	cyclictest	0	-21	swapper/0	08:35:18	0
3882488	99	38	1,35	cyclictest	0	-21	swapper/0	12:05:15	0
3882488	99	38	1,35	cyclictest	0	-21	swapper/0	09:10:20	0
3882488	99	38	1,2	cyclictest	3929909	-21	/usr/sbin/munin	11:45:20	0
3882488	99	38	1,2	cyclictest	0	-21	swapper/0	08:10:01	0
3882491	99	37	28,5	cyclictest	0	-21	swapper/2	11:05:16	2
3882491	99	37	25,8	cyclictest	1	-21	systemd	11:56:33	2
3882491	99	37	24,8	cyclictest	31	1	ktimers/2	11:40:11	2
3882491	99	37	23,11	cyclictest	0	-21	swapper/2	08:25:01	2
3882489	99	37	30,4	cyclictest	1674	50	irq/126-8000000.ethernet-tx1	11:30:13	1
3882489	99	37	29,5	cyclictest	0	-21	swapper/1	10:20:26	1
3882489	99	37	28,5	cyclictest	0	-21	swapper/1	07:35:27	1
3882489	99	37	25,9	cyclictest	0	-21	swapper/1	11:25:24	1
3882489	99	37	25,8	cyclictest	0	-21	swapper/1	08:05:29	1
3882489	99	37	22,9	cyclictest	22	-21	rcuc/1	09:45:29	1
3882489	99	37	21,11	cyclictest	23	1	ktimers/1	11:10:13	1
3882488	99	37	1,3	cyclictest	3889202	-21	irqstats	07:45:24	0
3882488	99	37	1,34	cyclictest	0	-21	swapper/0	09:07:28	0
3882491	99	36	28,5	cyclictest	0	-21	swapper/2	12:10:28	2
3882491	99	36	26,6	cyclictest	3892857	-21	grep	08:05:29	2
3882491	99	36	25,6	cyclictest	3898784	-21	grep	08:40:28	2
3882491	99	36	22,9	cyclictest	31	1	ktimers/2	12:00:13	2
3882491	99	36	22,9	cyclictest	0	-21	swapper/2	08:00:18	2
3882491	99	36	18,12	cyclictest	0	-21	swapper/2	09:00:20	2
3882491	99	36	12,6	cyclictest	3933066	-21	kworker/u8:3-ext4-rsv-conversion	12:10:01	2
3882489	99	36	5,23	cyclictest	3895409	-21	grep	08:20:28	1
3882489	99	36	28,4	cyclictest	0	-21	swapper/1	11:00:21	1
3882489	99	36	28,4	cyclictest	0	-21	swapper/1	11:00:21	1
3882489	99	36	27,4	cyclictest	0	-21	swapper/1	10:35:25	1
3882489	99	36	19,7	cyclictest	23	1	ktimers/1	11:05:14	1
3882489	99	36	18,9	cyclictest	0	-21	swapper/1	10:05:19	1
3882488	99	36	31,3	cyclictest	0	-21	swapper/0	11:05:12	0
3882488	99	36	30,3	cyclictest	0	-21	swapper/0	12:20:12	0
3882488	99	36	1,3	cyclictest	0	-21	swapper/0	07:20:14	0
3882488	99	36	1,33	cyclictest	0	-21	swapper/0	10:14:00	0
3882491	99	35	26,6	cyclictest	0	-21	swapper/2	09:55:19	2
3882491	99	35	25,7	cyclictest	3919606	-21	/usr/sbin/munin	10:45:19	2
3882491	99	35	25,4	cyclictest	0	-21	swapper/2	10:55:19	2
3882491	99	35	20,11	cyclictest	0	-21	swapper/2	11:30:17	2
3882489	99	35	29,4	cyclictest	14	-21	rcu_preempt	09:00:20	1
3882489	99	35	27,5	cyclictest	0	-21	swapper/1	08:50:20	1
3882489	99	35	24,4	cyclictest	0	-21	swapper/1	10:00:27	1
3882489	99	35	19,8	cyclictest	23	1	ktimers/1	08:40:11	1
3882488	99	35	28,4	cyclictest	0	-21	swapper/0	12:25:14	0
3882488	99	35	28,4	cyclictest	0	-21	swapper/0	12:25:14	0
3882491	99	34	20,9	cyclictest	30	-21	rcuc/2	11:45:13	2
3882489	99	34	28,3	cyclictest	14	-21	rcu_preempt	07:40:18	1
3882489	99	34	22,8	cyclictest	0	-21	swapper/1	09:35:29	1
3882489	99	34	22,8	cyclictest	0	-21	swapper/1	09:35:29	1
3882489	99	34	21,9	cyclictest	0	-21	swapper/1	12:00:28	1
3882489	99	34	18,9	cyclictest	0	-21	swapper/1	12:40:01	1
3882488	99	34	27,4	cyclictest	0	-21	swapper/0	07:50:24	0
3882488	99	34	27,4	cyclictest	0	-21	swapper/0	07:50:24	0
3882488	99	34	26,5	cyclictest	3931199	-21	grep	11:50:29	0
3882488	99	34	26,5	cyclictest	3931199	-21	grep	11:50:28	0
3882491	99	33	26,4	cyclictest	14	-21	rcu_preempt	10:40:27	2
3882491	99	33	25,5	cyclictest	3910559	-21	ptp4l-jitter	09:50:25	2
3882491	99	33	25,4	cyclictest	0	-21	swapper/2	07:25:29	2
3882491	99	33	20,8	cyclictest	0	-21	swapper/2	08:30:27	2
3882491	99	33	20,8	cyclictest	0	-21	swapper/2	08:30:27	2
3882489	99	33	27,4	cyclictest	3882482	-21	cyclictest	08:30:18	1
3882489	99	33	27,4	cyclictest	3882482	-21	cyclictest	08:30:18	1
3882489	99	33	26,4	cyclictest	0	-21	swapper/1	09:15:01	1
3882491	99	32	25,5	cyclictest	3926146	-21	kworker/u8:2-events_power_efficient	12:31:56	2
3882491	99	32	23,6	cyclictest	0	-21	swapper/2	09:45:20	2
3882491	99	32	20,7	cyclictest	0	-21	swapper/2	08:10:24	2
3882491	99	32	16,10	cyclictest	31	1	ktimers/2	07:50:12	2
3882491	99	32	16,10	cyclictest	31	1	ktimers/2	07:50:12	2
3882489	99	32	26,4	cyclictest	0	-21	swapper/1	09:50:17	1
3882489	99	32	23,6	cyclictest	3889781	-21	/usr/sbin/munin	07:50:21	1
3882489	99	32	23,6	cyclictest	3889781	-21	/usr/sbin/munin	07:50:21	1
3882489	99	32	21,7	cyclictest	0	-21	swapper/1	08:25:28	1
3882489	99	32	19,9	cyclictest	0	-21	swapper/1	10:55:27	1
3882491	99	31	23,6	cyclictest	0	-21	swapper/2	08:55:00	2
3882491	99	31	23,5	cyclictest	0	-21	swapper/2	07:10:28	2
3882491	99	31	22,6	cyclictest	0	-21	swapper/2	10:15:28	2
3882491	99	31	22,6	cyclictest	0	-21	swapper/2	10:15:28	2
3882491	99	31	2,25	cyclictest	0	-21	swapper/2	09:35:01	2
3882491	99	31	19,8	cyclictest	0	-21	swapper/2	11:00:28	2
3882491	99	31	19,8	cyclictest	0	-21	swapper/2	11:00:28	2
3882491	99	31	10,4	cyclictest	832	-21	systemd-network	07:44:42	2
3882489	99	31	22,5	cyclictest	3930449	-21	kworker/u8:0-events_power_efficient	11:50:10	1
3882489	99	31	22,5	cyclictest	3930449	-21	kworker/u8:0-events_power_efficient	11:50:10	1
3882489	99	31	22,5	cyclictest	0	-21	swapper/1	10:45:20	1
3882491	99	30	24,4	cyclictest	14	-21	rcu_preempt	10:00:27	2
3882491	99	30	22,4	cyclictest	0	-21	swapper/2	09:40:27	2
3882491	99	30	21,6	cyclictest	3920720	-21	sed	10:50:20	2
3882491	99	30	14,11	cyclictest	0	-21	swapper/2	12:15:25	2
3882489	99	30	22,6	cyclictest	3904990	-21	/usr/sbin/munin	09:20:24	1
3882489	99	30	22,6	cyclictest	3904990	-21	/usr/sbin/munin	09:20:24	1
3882489	99	30	19,8	cyclictest	0	-21	swapper/1	09:40:28	1
3882491	99	29	20,5	cyclictest	0	-21	swapper/2	11:20:20	2
3882491	99	29	19,7	cyclictest	3916314	-21	sh	10:25:21	2
3882491	99	29	18,6	cyclictest	3903008	-21	grep	09:05:28	2
3882491	99	29	13,10	cyclictest	0	-21	swapper/2	11:20:02	2
3882489	99	29	1,2	cyclictest	0	-21	swapper/1	07:10:01	1
3882491	99	28	16,8	cyclictest	0	-21	swapper/2	10:10:25	2
3882491	99	28	1,25	cyclictest	0	-21	swapper/2	07:20:15	2
3882491	99	28	12,12	cyclictest	31	1	ktimers/2	12:35:14	2
3882488	99	28	1,2	cyclictest	0	-21	swapper/0	07:10:01	0
3882489	99	27	2,18	cyclictest	3937249	-21	unixbench_singl	12:25:28	1
3882489	99	27	2,18	cyclictest	3937249	-21	unixbench_singl	12:25:28	1
3882491	99	23	13,5	cyclictest	0	-21	swapper/2	07:10:01	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2020-10-04 - 12:21