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Default latency plot of shadow in rack #2, slot #7

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
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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 rack2slot7s.osadl.org (updated Sun Feb 01, 2026 07:55:20)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3031996	99	79	68,8	cyclictest	3851713	-21	od	06:10:18	1
3031995	99	71	57,10	cyclictest	3854030	-21	sh	06:10:25	0
3031995	99	66	53,8	cyclictest	3846518	-21	rm	06:10:05	0
3031995	99	66	53,8	cyclictest	3846518	-21	rm	06:10:05	0
3031996	99	63	34,25	cyclictest	3275886	-21	sh	05:40:44	1
3031998	99	59	52,4	cyclictest	3845846	-21	sh	06:10:03	2
3031998	99	59	52,4	cyclictest	3845846	-21	sh	06:10:03	2
3031998	99	59	51,5	cyclictest	3263860	-21	grep	05:40:00	2
3031996	99	59	33,5	cyclictest	3846394	-21	tee	06:10:04	1
3031996	99	59	33,5	cyclictest	3846394	-21	tee	06:10:04	1
3031998	99	58	48,7	cyclictest	3851370	-21	sh	06:10:17	2
3031995	99	58	24,19	cyclictest	3336597	-21	sh	05:43:16	0
3031996	99	55	28,5	cyclictest	3263513	-21	cpuspeed	05:39:59	1
3031995	99	54	2,31	cyclictest	3924979	-21	ntpq	06:30:13	0
3031998	99	53	44,5	cyclictest	3227231	-21	spawn	05:35:01	2
3031996	99	53	28,5	cyclictest	3039975	-21	latency_hist	05:30:02	1
3031996	99	52	43,5	cyclictest	0	-21	swapper/1	05:50:10	1
3031998	99	51	43,4	cyclictest	0	-21	swapper/2	05:50:01	2
3031998	99	50	39,7	cyclictest	3266475	-21	sh	05:40:12	2
3031996	99	49	41,5	cyclictest	3346079	-21	execl	05:50:01	1
3031996	99	49	40,6	cyclictest	3167957	-21	spawn	05:35:02	1
3031995	99	49	41,4	cyclictest	0	-21	swapper/0	05:50:01	0
3031995	99	49	31,14	cyclictest	0	-21	swapper/0	05:50:14	0
3031995	99	49	1,30	cyclictest	3038890	-21	ntpq	05:25:11	0
3031995	99	47	33,11	cyclictest	3263851	-21	munin-run	05:40:01	0
3031998	99	45	35,6	cyclictest	3925792	-21	munin-run	06:35:01	2
3031996	99	45	33,9	cyclictest	763	-21	snmpd	05:20:15	1
3031995	99	45	2,38	cyclictest	3920336	-21	ntpq	06:15:06	0
3031995	99	45	2,37	cyclictest	3032584	-21	ntpq	05:05:08	0
3031995	99	45	1,26	cyclictest	3033758	-21	awk	05:10:03	0
3031998	99	44	36,5	cyclictest	3346990	-21	execl	05:50:22	2
3031998	99	44	36,5	cyclictest	3034842	-21	idleruntime-cro	05:15:01	2
3031996	99	44	36,5	cyclictest	3925829	-21	fschecks_count	06:35:01	1
3031995	99	44	22,19	cyclictest	0	-21	swapper/0	06:00:01	0
3031998	99	43	29,9	cyclictest	3924289	-21	latency_hist	06:30:02	2
3031995	99	43	17,16	cyclictest	124	50	irq/32-eth0	05:15:15	0
3031995	99	43	17,16	cyclictest	124	50	irq/32-eth0	05:15:15	0
3031995	99	42	19,20	cyclictest	3681832	-21	spawn	06:04:12	0
3031996	99	41	31,6	cyclictest	3349724	-21	cut	06:00:01	1
3031995	99	41	3,34	cyclictest	3926422	-21	ntpq	06:35:09	0
3031995	99	41	2,36	cyclictest	3040436	-21	ntpq	05:30:08	0
3031995	99	41	1,36	cyclictest	3923499	-21	ntpq	06:25:14	0
3031998	99	40	31,6	cyclictest	3922404	-21	unixbench_multi	06:20:21	2
3031996	99	40	32,5	cyclictest	3927373	-21	grep	06:40:02	1
3031996	99	40	29,8	cyclictest	3921256	-21	/usr/sbin/munin	06:20:01	1
3031998	99	39	30,6	cyclictest	3437895	-21	spawn	06:03:12	2
3031995	99	39	1,33	cyclictest	3037310	-21	ntpq	05:20:11	0
3031998	99	38	1,31	cyclictest	3037354	-21	execl	05:20:15	2
3031996	99	38	29,6	cyclictest	3499418	-21	spawn	06:03:29	1
3031995	99	38	1,34	cyclictest	3921940	-21	ntpq	06:20:12	0
3031998	99	37	30,4	cyclictest	3036465	-21	munin-run	05:20:01	2
3031998	99	37	30,4	cyclictest	3036465	-21	munin-run	05:20:01	2
3031996	99	36	28,5	cyclictest	0	-21	swapper/1	06:30:01	1
3031998	99	34	25,6	cyclictest	2912100	-21	cups-browsed	06:39:59	2
3031998	99	33	25,5	cyclictest	3921251	-21	latency_hist	06:20:02	2
3031998	99	33	25,5	cyclictest	1	-21	systemd	06:00:01	2
3031996	99	33	28,2	cyclictest	0	-21	swapper/1	05:20:01	1
3031996	99	33	28,2	cyclictest	0	-21	swapper/1	05:20:01	1
3031996	99	33	25,4	cyclictest	0	-21	swapper/1	05:15:01	1
3031998	99	31	26,2	cyclictest	0	-21	swapper/2	05:05:01	2
3031996	99	30	23,4	cyclictest	3032002	-21	systemd-run	05:05:01	1
3031995	99	30	1,26	cyclictest	3032024	-21	munin-run	05:05:02	0
3031996	99	29	21,5	cyclictest	3922996	-21	fschecks_count	06:25:02	1
3031996	99	29	21,5	cyclictest	3606335	-21	systemd-logind	05:10:02	1
3031998	99	28	11,14	cyclictest	35	1	ktimers/2	05:25:15	2
3031998	99	27	21,3	cyclictest	3019099	-21	kworker/u8:7-xprtiod	05:05:20	2
3032000	99	21	3,9	cyclictest	0	-21	swapper/3	05:40:09	3
3032000	99	20	5,7	cyclictest	0	-21	swapper/3	06:10:20	3
3032000	99	20	2,8	cyclictest	0	-21	swapper/3	05:15:17	3
3032000	99	20	2,8	cyclictest	0	-21	swapper/3	05:15:17	3
3032000	99	18	4,8	cyclictest	0	-21	swapper/3	05:56:16	3
3032000	99	18	3,8	cyclictest	0	-21	swapper/3	06:03:56	3
3032000	99	18	3,10	cyclictest	0	-21	swapper/3	06:05:34	3
3032000	99	18	3,10	cyclictest	0	-21	swapper/3	06:05:34	3
3032000	99	16	3,8	cyclictest	0	-21	swapper/3	05:50:11	3
3032000	99	16	1,8	cyclictest	0	-21	swapper/3	05:35:02	3
3032000	99	15	3,4	cyclictest	0	-21	swapper/3	05:35:09	3
3032000	99	15	1,7	cyclictest	0	-21	swapper/3	06:25:11	3
3032000	99	15	1,7	cyclictest	0	-21	swapper/3	05:45:13	3
3032000	99	15	1,6	cyclictest	0	-21	swapper/3	06:35:06	3
3032000	99	14	4,6	cyclictest	0	-21	swapper/3	06:20:08	3
3032000	99	14	1,7	cyclictest	0	-21	swapper/3	05:10:08	3
3032000	99	14	1,6	cyclictest	0	-21	swapper/3	06:30:10	3
3032000	99	13	2,7	cyclictest	0	-21	swapper/3	05:20:13	3
3032000	99	13	2,6	cyclictest	0	-21	swapper/3	05:25:14	3
3032000	99	12	2,6	cyclictest	0	-21	swapper/3	06:20:01	3
3032000	99	12	2,6	cyclictest	0	-21	swapper/3	05:05:08	3
3032000	99	12	2,5	cyclictest	0	-21	swapper/3	05:05:03	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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