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Default latency plot of shadow in rack #c, 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 rackcslot7s.osadl.org (updated Fri Dec 26, 2025 12:44:49)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3721057	2	258	0,21	sleep3	42	-21	ksoftirqd/3	07:05:21	3
3721883	2	207	0,9	sleep2	4497	-21	PK-Backend	07:08:00	2
3791554	2	102	0,14	sleep0	13	-21	ksoftirqd/0	10:22:53	0
1973	99	98	0,5	rtkit-daemon	0	-21	swapper/3	12:05:17	3
3819694	2	91	0,8	sleep0	4497	-21	PK-Backend	11:45:03	0
3749323	2	83	0,6	sleep0	4497	-21	PK-Backend	08:25:02	0
3788094	2	77	0,7	sleep2	4497	-21	PK-Backend	10:15:01	2
3751031	2	76	0,3	sleep0	3751032	-21	sleep	08:30:01	0
3721858	2	74	47,17	sleep1	0	-21	swapper/1	07:07:57	1
3731828	2	65	0,19	sleep1	26	-21	ksoftirqd/1	07:35:16	1
3721857	2	65	44,13	sleep0	0	-21	swapper/0	07:07:56	0
3825722	2	59	0,15	chrt	26	-21	ksoftirqd/1	12:00:25	1
3722210	99	59	22,12	cyclictest	438	-20	systemd-journal	11:17:01	3
3722210	99	56	17,13	cyclictest	438	-20	systemd-journal	08:08:07	3
3722210	99	55	16,11	cyclictest	3777368	-21	grep	09:45:01	3
3722210	99	53	19,10	cyclictest	3731289	-21	perf	07:34:59	3
3722210	99	53	16,11	cyclictest	438	-20	systemd-journal	12:00:21	3
3722210	99	53	15,11	cyclictest	3724829	-21	cstates	07:15:14	3
3722205	99	53	13,19	cyclictest	34	-21	ksoftirqd/2	12:25:02	2
3755651	2	52	0,19	sleep0	13	-21	ksoftirqd/0	08:40:30	0
3722210	99	52	18,13	cyclictest	3800757	-21	awk	10:50:14	3
3722210	99	52	16,11	cyclictest	3796567	-21	cat	10:35:30	3
3722210	99	51	16,11	cyclictest	3768371	-21	apt-get	09:20:00	3
3722202	99	51	1,16	cyclictest	3729546	-21	sh	07:30:00	1
3734100	2	50	0,5	sleep3	0	-21	swapper/3	07:40:25	3
3722210	99	50	20,7	cyclictest	3784885	-21	sh	10:05:15	3
3722210	99	50	18,12	cyclictest	3755292	-21	cat	08:40:22	3
3722210	99	49	21,9	cyclictest	3729642	-21	latency_hist	07:30:00	3
3722210	99	49	17,12	cyclictest	3834241	-21	df	12:25:16	3
3722210	99	49	14,11	cyclictest	3836887	-21	seq	12:32:19	3
3722210	99	48	16,8	cyclictest	3807833	-21	cstates	11:10:13	3
3722202	99	48	25,19	cyclictest	3770417	-21	awk	09:25:01	1
3820493	2	47	0,5	chrt	0	-21	swapper/0	11:45:23	0
3722210	99	47	14,10	cyclictest	3816900	-21	sed	11:35:22	3
3722210	99	47	13,10	cyclictest	3724056	-21	date	07:15:02	3
3722210	99	47	1,26	cyclictest	3824436	-21	chrt	11:57:00	3
3722210	99	47	12,10	cyclictest	438	-20	systemd-journal	11:35:00	3
3722210	99	46	2,23	cyclictest	3779324	-21	apt	09:50:11	3
3722210	99	46	19,6	cyclictest	3795241	-21	perf	10:35:00	3
3722210	99	46	16,7	cyclictest	3799108	-21	tr	10:45:14	3
3722210	99	45	2,7	cyclictest	3769269	-21	df_inode	09:20:14	3
3722210	99	45	25,4	cyclictest	0	-21	swapper/3	11:44:12	3
3722210	99	45	18,7	cyclictest	3778076	-21	interrupts	09:45:18	3
3722210	99	44	2,22	cyclictest	3749951	-21	fw_packets	08:25:19	3
3722210	99	44	18,7	cyclictest	3820219	-21	irqstats	11:45:19	3
3722210	99	44	1,7	cyclictest	3788214	-21	/usr/sbin/munin	10:15:27	3
3722210	99	44	1,28	cyclictest	0	-21	swapper/3	10:20:05	3
3722210	99	44	1,23	cyclictest	3805310	-21	taskset	11:01:07	3
3722210	99	44	1,11	cyclictest	3738126	-21	taskset	07:53:32	3
3722210	99	44	1,10	cyclictest	3821634	-21	cpuspeed_turbos	11:50:17	3
3722205	99	44	17,8	cyclictest	34	-21	ksoftirqd/2	08:53:05	2
3722205	99	44	16,14	cyclictest	14	1	rcu_preempt	07:11:47	2
3722205	99	44	15,16	cyclictest	34	-21	ksoftirqd/2	11:38:11	2
3722205	99	44	13,17	cyclictest	34	-21	ksoftirqd/2	11:01:22	2
3722202	99	44	34,7	cyclictest	25	1	rcuc/1	08:15:33	1
3722202	99	44	26,8	cyclictest	26	-21	ksoftirqd/1	09:49:37	1
3722202	99	44	10,8	cyclictest	26	-21	ksoftirqd/1	07:15:10	1
3734250	2	43	0,7	sleep2	4497	-21	PK-Backend	07:40:28	2
3722210	99	43	1,8	cyclictest	2190	-21	gvfs-udisks2-vo	11:09:56	3
3722210	99	43	17,7	cyclictest	3740534	-21	/usr/sbin/munin	08:00:23	3
3722205	99	43	22,13	cyclictest	34	-21	ksoftirqd/2	10:56:04	2
3722205	99	43	22,13	cyclictest	34	-21	ksoftirqd/2	10:56:04	2
3722205	99	43	13,12	cyclictest	14	1	rcu_preempt	12:30:16	2
3722205	99	43	12,15	cyclictest	34	-21	ksoftirqd/2	08:12:09	2
3722205	99	43	12,15	cyclictest	34	-21	ksoftirqd/2	08:12:09	2
3722202	99	43	8,6	cyclictest	14	1	rcu_preempt	12:39:59	1
3722202	99	43	3,10	cyclictest	26	-21	ksoftirqd/1	11:54:59	1
3722202	99	43	16,8	cyclictest	26	-21	ksoftirqd/1	09:41:12	1
3722202	99	43	14,10	cyclictest	26	-21	ksoftirqd/1	11:15:28	1
3722202	99	43	1,15	cyclictest	3751004	-21	cron	08:30:01	1
3722210	99	42	24,4	cyclictest	4497	-21	PK-Backend	08:21:32	3
3722210	99	42	19,5	cyclictest	42	-21	ksoftirqd/3	11:27:18	3
3722210	99	42	17,7	cyclictest	3731524	-21	/usr/sbin/munin	07:35:24	3
3722205	99	42	15,8	cyclictest	34	-21	ksoftirqd/2	11:25:26	2
3722205	99	42	15,7	cyclictest	14	1	rcu_preempt	08:05:21	2
3722205	99	42	10,16	cyclictest	34	-21	ksoftirqd/2	08:59:25	2
3722202	99	42	17,13	cyclictest	14	1	rcu_preempt	12:17:38	1
3722202	99	42	17,13	cyclictest	14	1	rcu_preempt	09:37:13	1
3722202	99	42	16,10	cyclictest	26	-21	ksoftirqd/1	12:24:56	1
3722202	99	42	14,8	cyclictest	26	-21	ksoftirqd/1	10:20:23	1
3722202	99	42	1,19	cyclictest	26	-21	ksoftirqd/1	09:51:18	1
3722202	99	42	10,18	cyclictest	26	-21	ksoftirqd/1	07:20:09	1
3722199	99	42	15,14	cyclictest	13	-21	ksoftirqd/0	07:29:59	0
1973	99	42	0,28	rtkit-daemon	4497	-21	PK-Backend	10:10:03	2
3772359	2	41	0,6	sleep1	0	-21	swapper/1	09:30:01	1
3722210	99	41	2,7	cyclictest	3832966	-21	users	12:20:29	3
3722210	99	41	17,7	cyclictest	1054	-21	snmpd	09:03:50	3
3722210	99	41	15,10	cyclictest	3781255	-21	ls	09:55:14	3
3722205	99	41	8,12	cyclictest	3822189	-21	netstat	11:50:26	2
3722205	99	41	25,12	cyclictest	34	-21	ksoftirqd/2	08:21:48	2
3722205	99	41	23,14	cyclictest	34	-21	ksoftirqd/2	12:35:19	2
3722205	99	41	21,13	cyclictest	34	-21	ksoftirqd/2	10:44:57	2
3722202	99	41	9,8	cyclictest	26	-21	ksoftirqd/1	08:40:00	1
3722202	99	41	9,8	cyclictest	26	-21	ksoftirqd/1	08:39:59	1
3722202	99	41	2,21	cyclictest	26	-21	ksoftirqd/1	08:30:18	1
3722202	99	41	22,14	cyclictest	438	-20	systemd-journal	10:10:01	1
3722202	99	41	1,6	cyclictest	4497	-21	PK-Backend	10:05:01	1
3722202	99	41	13,16	cyclictest	26	-21	ksoftirqd/1	09:18:34	1
3722202	99	41	12,9	cyclictest	26	-21	ksoftirqd/1	12:10:21	1
3722199	99	41	24,6	cyclictest	13	-21	ksoftirqd/0	10:00:02	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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