OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack7slot4s.osadl.org (updated Mon May 11, 2026 00:45:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
26977	99	76	1,9	cyclictest	12	-21	ksoftirqd/0	22:10:13	0
26977	99	66	8,43	cyclictest	20556	-21	ssh	21:50:13	0
26999	99	65	3,41	cyclictest	8789	-21	ssh	22:55:12	2
26999	99	64	1,38	cyclictest	0	-21	swapper/2	21:50:13	2
26999	99	62	6,6	cyclictest	13	1	rcu_preempt	22:45:12	2
26999	99	61	11,41	cyclictest	13	1	rcu_preempt	22:05:14	2
26999	99	58	5,13	cyclictest	13	1	rcu_preempt	00:15:13	2
26977	99	55	2,41	cyclictest	25846	-21	ssh	21:35:14	0
26999	99	51	4,30	cyclictest	930	-21	snmpd	21:40:13	2
26987	99	51	6,40	cyclictest	9597	-21	ssh	00:25:13	1
26999	99	49	16,25	cyclictest	27	-21	ksoftirqd/2	00:35:12	2
26987	99	49	3,7	cyclictest	13	1	rcu_preempt	00:35:12	1
26987	99	48	3,30	cyclictest	11448	-21	ssh	23:50:15	1
26999	99	46	4,21	cyclictest	20331	-21	ssh	23:55:12	2
26987	99	45	5,34	cyclictest	6276	-21	ssh	22:00:13	1
26987	99	45	29,13	cyclictest	23074	-21	apt-get	22:45:12	1
26987	99	45	28,11	cyclictest	13978	-21	apt-get	22:40:11	1
26987	99	44	5,30	cyclictest	25794	-21	ssh	23:40:14	1
26987	99	42	32,4	cyclictest	11678	-21	apt-get	20:35:13	1
26987	99	42	14,17	cyclictest	24650	-21	grep	21:15:23	1
26987	99	42	14,17	cyclictest	24650	-21	grep	21:15:23	1
26987	99	41	4,32	cyclictest	15338	-21	ssh	22:05:13	1
26987	99	41	24,12	cyclictest	24305	-21	apt-get	22:10:13	1
26987	99	41	10,12	cyclictest	14137	-21	ssh	21:45:21	1
26977	99	41	3,28	cyclictest	460	-21	ssh	00:20:12	0
26977	99	41	13,18	cyclictest	12	-21	ksoftirqd/0	22:40:11	0
26987	99	40	28,9	cyclictest	0	-21	swapper/1	21:10:11	1
26987	99	40	28,9	cyclictest	0	-21	swapper/1	21:10:11	1
26977	99	40	14,3	cyclictest	13	1	rcu_preempt	22:35:12	0
27011	99	39	7,19	cyclictest	359	66	irq/58-eth0	00:05:12	3
26999	99	39	4,4	cyclictest	13	1	rcu_preempt	20:05:14	2
26999	99	39	12,8	cyclictest	13	1	rcu_preempt	21:35:13	2
26999	99	39	1,22	cyclictest	10049	-21	ssh	22:20:14	2
26999	99	39	0,19	cyclictest	5921	-21	ssh	00:05:13	2
26987	99	39	34,3	cyclictest	29739	-21	apt-get	20:20:12	1
26987	99	39	23,11	cyclictest	19092	-21	ssh	22:25:12	1
26987	99	39	20,14	cyclictest	0	-21	swapper/1	21:55:13	1
26987	99	38	29,4	cyclictest	4387	-21	apt-get	19:20:11	1
26987	99	38	25,10	cyclictest	8778	-21	apt-get	22:55:13	1
26987	99	38	12,10	cyclictest	14466	-21	ssh	00:09:55	1
26987	99	38	11,12	cyclictest	23537	-21	grep	23:20:20	1
26987	99	38	11,12	cyclictest	23537	-21	grep	23:20:20	1
26977	99	38	1,6	cyclictest	13	1	rcu_preempt	20:20:12	0
27011	99	37	30,3	cyclictest	359	66	irq/58-eth0	23:15:15	3
26999	99	37	11,10	cyclictest	27	-21	ksoftirqd/2	22:10:13	2
26987	99	37	9,9	cyclictest	7445	-21	cron	21:25:00	1
26987	99	37	28,4	cyclictest	25819	-21	apt-get	21:35:13	1
26987	99	37	26,6	cyclictest	449	-21	apt-get	00:20:13	1
26987	99	37	13,16	cyclictest	3312	-21	ssh	22:33:36	1
26987	99	37	12,9	cyclictest	18376	-21	cat	19:30:30	1
26987	99	37	12,11	cyclictest	16029	-21	ssh	23:34:45	1
26987	99	37	12,10	cyclictest	27777	-21	/usr/sbin/munin	19:10:18	1
26987	99	37	10,12	cyclictest	32187	-21	ssh	22:50:12	1
26987	99	37	10,10	cyclictest	9583	-21	cat	22:35:30	1
26977	99	37	10,23	cyclictest	12	-21	ksoftirqd/0	22:25:13	0
26999	99	36	2,28	cyclictest	11021	-21	ssh	23:13:27	2
26999	99	36	18,8	cyclictest	27	-21	ksoftirqd/2	00:20:12	2
26987	99	36	9,13	cyclictest	5384	-21	cut	21:40:22	1
26987	99	36	1,32	cyclictest	3649	-21	sh	23:10:13	1
26987	99	36	13,13	cyclictest	32496	-21	kthreadcore	20:55:19	1
26987	99	36	10,12	cyclictest	20084	-21	kthreadcore	23:35:23	1
26987	99	36	10,11	cyclictest	8801	-21	sh	23:47:23	1
26987	99	36	10,10	cyclictest	2560	-21	cut	19:50:18	1
26977	99	36	3,15	cyclictest	13	1	rcu_preempt	23:17:13	0
27011	99	35	20,12	cyclictest	359	66	irq/58-eth0	23:50:15	3
26987	99	35	9,10	cyclictest	14841	-21	usage_EthcTask	22:20:31	1
26987	99	35	6,11	cyclictest	31347	-21	cat	23:05:31	1
26987	99	35	29,3	cyclictest	2115	-21	apt-get	20:25:13	1
26987	99	35	2,24	cyclictest	17888	-21	ssh	23:00:14	1
26987	99	35	20,10	cyclictest	28517	-21	apt-get	19:45:13	1
26987	99	35	11,7	cyclictest	0	-21	swapper/1	00:33:46	1
26987	99	34	9,10	cyclictest	3020	-21	ssh	00:01:57	1
26987	99	34	11,9	cyclictest	23681	-21	/usr/sbin/munin	19:40:17	1
26977	99	34	0,31	cyclictest	0	-21	swapper/0	23:30:14	0
27011	99	33	18,12	cyclictest	359	66	irq/58-eth0	22:40:13	3
27011	99	33	1,20	cyclictest	359	66	irq/58-eth0	22:05:14	3
26999	99	33	3,14	cyclictest	17867	-21	ssh	00:29:37	2
26987	99	33	18,9	cyclictest	30985	-21	ssh	23:25:10	1
26987	99	33	10,8	cyclictest	27587	-21	ntp_192.168.114	00:15:25	1
26987	99	33	10,8	cyclictest	18617	-21	ssh	00:10:26	1
26987	99	33	10,8	cyclictest	16976	-21	diskstats	21:30:18	1
26987	99	33	10,10	cyclictest	29257	-21	cat	20:15:30	1
26987	99	33	10,10	cyclictest	20483	-21	cut	20:10:17	1
26977	99	33	10,15	cyclictest	12	-21	ksoftirqd/0	00:00:13	0
27011	99	32	1,17	cyclictest	359	66	irq/58-eth0	22:55:13	3
26987	99	32	9,7	cyclictest	26304	-21	perl	20:50:16	1
26987	99	32	10,7	cyclictest	28989	-21	ssh	21:54:47	1
26987	99	32	10,7	cyclictest	1672	-21	irqstats	22:15:19	1
26977	99	32	3,25	cyclictest	5912	-21	ssh	00:05:12	0
26999	99	31	6,15	cyclictest	27	-21	ksoftirqd/2	23:35:14	2
26999	99	31	4,17	cyclictest	273	46	irq/40-dwc2_hso	19:25:14	2
26999	99	31	2,19	cyclictest	273	46	irq/40-dwc2_hso	23:45:14	2
26987	99	31	9,8	cyclictest	25092	-21	cat	20:45:29	1
26987	99	31	9,7	cyclictest	10803	-21	if_eth1	20:00:18	1
26987	99	31	25,3	cyclictest	16505	-21	apt-get	20:40:13	1
26987	99	31	11,9	cyclictest	10551	-21	threads	20:30:28	1
26987	99	31	10,8	cyclictest	11813	-21	sed	21:25:29	1
26977	99	31	2,22	cyclictest	6096	-21	ntp_states	23:45:27	0
26999	99	30	2,22	cyclictest	25918	-21	ssh	21:15:28	2
26999	99	30	2,22	cyclictest	25918	-21	ssh	21:15:28	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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