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 Sat Aug 08, 2026 12:45:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
9306	99	63	21,27	cyclictest	359	66	irq/58-eth0	09:10:14	3
9261	99	62	4,8	cyclictest	13	1	rcu_preempt	10:30:14	0
9276	99	59	2,49	cyclictest	24511	-21	ssh	10:20:14	1
9261	99	59	5,40	cyclictest	13	1	rcu_preempt	10:45:14	0
9306	99	58	50,4	cyclictest	359	66	irq/58-eth0	12:15:15	3
9292	99	49	5,17	cyclictest	27	-21	ksoftirqd/2	10:30:14	2
9292	99	49	0,28	cyclictest	6477	-21	ssh	10:10:12	2
9292	99	47	7,19	cyclictest	27	-21	ksoftirqd/2	10:25:14	2
9292	99	47	1,35	cyclictest	27	-21	ksoftirqd/2	08:30:12	2
9292	99	46	5,32	cyclictest	4442	-21	ssh	12:15:16	2
9261	99	46	7,7	cyclictest	13	1	rcu_preempt	12:15:16	0
9261	99	46	6,6	cyclictest	13	1	rcu_preempt	08:30:12	0
9276	99	45	16,21	cyclictest	616	-21	systemd-logind	08:10:15	1
9261	99	45	2,31	cyclictest	29929	-21	ssh	10:05:15	0
9292	99	43	4,17	cyclictest	27	-21	ksoftirqd/2	09:10:14	2
9276	99	43	1,35	cyclictest	31380	-21	ssh	12:30:13	1
9261	99	43	1,39	cyclictest	19209	-21	ssh	10:35:16	0
9276	99	42	25,12	cyclictest	0	-21	swapper/1	10:15:16	1
9276	99	41	3,24	cyclictest	4751	-21	ssh	10:45:16	1
9276	99	41	1,6	cyclictest	17226	-21	ssh	09:40:14	1
9261	99	41	15,12	cyclictest	13	1	rcu_preempt	07:40:14	0
9261	99	41	1,32	cyclictest	11777	-21	ssh	09:55:13	0
9261	99	40	14,11	cyclictest	13	1	rcu_preempt	11:45:13	0
9306	99	38	5,22	cyclictest	359	66	irq/58-eth0	10:40:13	3
9306	99	38	4,27	cyclictest	359	66	irq/58-eth0	12:05:13	3
9276	99	38	5,29	cyclictest	9846	-21	ssh	12:00:15	1
9276	99	37	1,9	cyclictest	10159	-21	awk	10:10:26	1
9276	99	37	1,29	cyclictest	11665	-21	sh	11:25:14	1
9261	99	37	10,20	cyclictest	26249	-21	ssh	11:15:15	0
9292	99	36	21,12	cyclictest	27	-21	ksoftirqd/2	12:30:13	2
9276	99	36	1,9	cyclictest	1531	-21	grep	08:05:30	1
9276	99	36	1,10	cyclictest	27251	-21	tr	09:45:19	1
9276	99	36	1,10	cyclictest	24950	-21	ssh	09:25:19	1
9292	99	35	5,15	cyclictest	26	1	rcuc/2	09:30:14	2
9292	99	35	2,15	cyclictest	9164	-21	apt-get	07:10:04	2
9292	99	35	2,15	cyclictest	9164	-21	apt-get	07:10:04	2
9276	99	35	7,4	cyclictest	5052	-21	switchtime	10:25:31	1
9276	99	35	2,22	cyclictest	21	-21	ksoftirqd/1	07:25:13	1
9276	99	35	1,9	cyclictest	32041	-21	grep	12:10:31	1
9276	99	35	1,7	cyclictest	27745	-21	apt	10:40:01	1
9276	99	35	1,11	cyclictest	26222	-21	apt-get	11:15:15	1
9276	99	35	1,10	cyclictest	8203	-21	ssh	09:35:13	1
9276	99	35	1,10	cyclictest	31941	-21	wc	10:40:27	1
9276	99	35	0,10	cyclictest	31681	-21	irqcore	08:40:17	1
9261	99	35	1,27	cyclictest	20823	-21	ssh	10:00:12	0
9306	99	34	3,18	cyclictest	359	66	irq/58-eth0	10:45:14	3
9306	99	34	2,20	cyclictest	359	66	irq/58-eth0	10:20:13	3
9292	99	34	18,11	cyclictest	27	-21	ksoftirqd/2	08:10:14	2
9276	99	34	2,9	cyclictest	28634	-21	ntp_kernel_err	08:00:25	1
9276	99	34	2,11	cyclictest	27545	-21	diskmemload	12:15:15	1
9276	99	34	2,10	cyclictest	25185	-21	kthreadcore	10:55:24	1
9276	99	34	1,9	cyclictest	17928	-21	tr	09:00:01	1
9276	99	34	1,9	cyclictest	10347	-21	cut	10:30:17	1
9276	99	34	1,8	cyclictest	5940	-21	ssh	11:20:24	1
9276	99	34	1,8	cyclictest	13979	-21	ps	12:20:20	1
9276	99	34	1,8	cyclictest	12277	-21	cat	08:50:28	1
9276	99	34	1,7	cyclictest	12112	-21	latency_hist	08:20:02	1
9276	99	34	17,12	cyclictest	27774	-1	kworker/u9:2	09:15:12	1
9276	99	34	11,20	cyclictest	27545	-21	diskmemload	11:35:28	1
9276	99	34	1,10	cyclictest	9436	-21	latency_hist	07:10:01	1
9276	99	34	1,10	cyclictest	24813	-21	cut	12:25:23	1
9276	99	34	1,10	cyclictest	19007	-21	ntp_states	11:45:26	1
9261	99	34	3,21	cyclictest	1148	-21	sh	10:25:15	0
9306	99	33	3,19	cyclictest	359	66	irq/58-eth0	11:25:13	3
9292	99	33	13,15	cyclictest	27	-21	ksoftirqd/2	08:20:14	2
9276	99	33	1,9	cyclictest	6084	-21	kthreadcore	09:50:23	1
9276	99	33	1,9	cyclictest	26415	-21	cat	08:35:01	1
9276	99	33	1,9	cyclictest	22687	-21	kthreadcore	11:30:23	1
9276	99	33	1,9	cyclictest	22343	-21	latency_hist	10:55:01	1
9276	99	33	1,9	cyclictest	12139	-21	if_eth1	09:55:17	1
9276	99	33	1,10	cyclictest	2515	-21	kthreadcore	11:55:23	1
9276	99	33	1,10	cyclictest	21948	-21	kthreadcore	12:05:23	1
9276	99	33	1,10	cyclictest	10852	-21	kthreadcore	07:10:20	1
9276	99	33	1,10	cyclictest	10852	-21	kthreadcore	07:10:20	1
9276	99	33	0,9	cyclictest	11950	-21	ssh	11:05:28	1
9276	99	33	0,9	cyclictest	11950	-21	ssh	11:05:28	1
9276	99	33	0,8	cyclictest	20772	-21	irqcore	07:55:17	1
9261	99	33	2,7	cyclictest	13	1	rcu_preempt	09:34:39	0
9306	99	32	3,18	cyclictest	32	1	rcuc/3	11:50:14	3
9292	99	32	4,18	cyclictest	273	46	irq/40-dwc2_hso	12:20:16	2
9292	99	32	1,17	cyclictest	11676	-21	ssh	11:25:14	2
9276	99	32	5,6	cyclictest	19980	-21	cat	07:50:29	1
9276	99	32	1,9	cyclictest	21203	-21	cat	11:10:30	1
9276	99	32	1,9	cyclictest	15370	-21	latency_hist	07:50:01	1
9276	99	32	1,8	cyclictest	15643	-21	ntpq	08:20:25	1
9276	99	32	1,8	cyclictest	13711	-21	cpuspeed	09:20:16	1
9276	99	32	1,8	cyclictest	13711	-21	cpuspeed	09:20:15	1
9276	99	32	1,7	cyclictest	7725	-21	cut	11:40:20	1
9276	99	32	1,10	cyclictest	796	-21	kthreadcore	11:00:21	1
9276	99	32	0,8	cyclictest	29522	-21	awk	10:05:01	1
9261	99	32	3,22	cyclictest	28155	-21	ssh	10:40:13	0
9306	99	31	3,14	cyclictest	359	66	irq/58-eth0	11:55:14	3
9306	99	31	2,21	cyclictest	359	66	irq/58-eth0	11:45:12	3
9306	99	31	2,16	cyclictest	359	66	irq/58-eth0	09:05:13	3
9306	99	31	12,12	cyclictest	359	66	irq/58-eth0	11:30:14	3
9292	99	31	6,17	cyclictest	27	-21	ksoftirqd/2	10:50:13	2
9292	99	31	1,19	cyclictest	18830	-21	ssh	12:05:14	2
9276	99	31	1,9	cyclictest	8493	-21	latency_hist	08:50:02	1
9276	99	31	1,8	cyclictest	6015	-21	df	07:40:16	1
9276	99	31	1,8	cyclictest	22951	-21	/usr/sbin/munin	09:05:27	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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