OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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.

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 100 highest latencies:

System rackeslot4s.osadl.org (updated Sun Mar 29, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3859725	99	41	36,4	cyclictest	4021027	-21	gpgv	21:45:01	0
3859725	99	37	32,3	cyclictest	4188390	-21	base64	00:25:01	0
3859735	99	34	30,3	cyclictest	3974262	-21	kworker/u8:4+flush-259:0	21:55:16	3
3859735	99	34	30,3	cyclictest	3869709	-21	kworker/u8:1+flush-259:0	19:45:25	3
3859735	99	34	28,4	cyclictest	3999872	-21	apt-get	21:25:01	3
3859725	99	34	31,2	cyclictest	4152334	-21	apt-get	23:50:10	0
3859731	99	32	27,4	cyclictest	4100376	-21	cat	23:00:02	2
3859729	99	32	28,3	cyclictest	4100543	-21	apt-get	23:00:12	1
3859729	99	32	28,3	cyclictest	4032081	-21	kworker/u8:1+flush-259:0	22:10:19	1
3859725	99	32	29,2	cyclictest	4042900	-21	gpgv	22:05:01	0
3859731	99	31	26,3	cyclictest	252	-21	systemd-journal	21:35:20	2
3859725	99	31	28,2	cyclictest	3869709	-21	kworker/u8:1+flush-259:0	19:40:24	0
3859725	99	31	28,2	cyclictest	3869709	-21	kworker/u8:1+flush-259:0	19:40:24	0
3859729	99	30	25,3	cyclictest	4142102	-21	apt-get	23:40:11	1
3859725	99	30	26,3	cyclictest	3859949	-21	apt-get	19:10:11	0
3859735	99	29	25,3	cyclictest	1665514	-21	kworker/u8:3+flush-259:0	20:40:25	3
3859725	99	29	26,2	cyclictest	4042990	-21	kworker/u8:2+flush-259:0	22:35:16	0
3859735	99	27	23,3	cyclictest	3885721	-21	kworker/u8:4+flush-259:0	19:50:27	3
3859735	99	27	22,4	cyclictest	4177938	-21	latency_hist	00:15:00	3
3859731	99	27	23,3	cyclictest	3953271	-21	apt-get	20:40:13	2
3859731	99	27	20,5	cyclictest	3968625	-21	cat	20:55:02	2
3859729	99	27	21,4	cyclictest	4032323	-21	apt-get	21:55:13	1
3859735	99	26	22,3	cyclictest	4090203	-21	kworker/u8:2+events_unbound	23:10:13	3
3859735	99	25	21,3	cyclictest	1665514	-21	kworker/u8:3+flush-259:0	20:15:18	3
3859731	99	25	22,2	cyclictest	3989773	-21	kworker/u8:0+flush-259:0	21:40:17	2
3859731	99	25	21,3	cyclictest	4120580	-21	kworker/u8:0+flush-259:0	23:20:29	2
3859731	99	25	20,4	cyclictest	5070	-21	gpgv	00:34:59	2
3859729	99	25	21,3	cyclictest	4068767	-21	apt-get	22:30:10	1
3859729	99	25	20,4	cyclictest	4167876	-21	apt-get	00:05:11	1
3859725	99	25	22,2	cyclictest	4090203	-21	kworker/u8:2+events_unbound	23:15:12	0
3859725	99	25	21,3	cyclictest	4042453	-21	gpgv	22:05:00	0
3859725	99	25	20,4	cyclictest	9791	-21	ntpq	00:35:23	0
3859725	99	25	20,4	cyclictest	4063346	-21	latency_hist	22:25:01	0
3859735	99	24	20,3	cyclictest	4078847	-21	kworker/u8:3+flush-259:0	23:30:15	3
3859731	99	24	20,2	cyclictest	4162407	-21	kworker/u8:4+flush-259:0	00:09:59	2
3859725	99	24	21,2	cyclictest	4146999	-21	kworker/u8:2+events_unbound	00:15:24	0
3859725	99	24	21,2	cyclictest	4146999	-21	kworker/u8:2+events_unbound	00:15:23	0
3859735	99	23	20,2	cyclictest	3895838	-21	kworker/u8:0+events_unbound	20:00:25	3
3859735	99	23	18,3	cyclictest	4194255	-21	diskstats	00:30:14	3
3859725	99	23	20,2	cyclictest	3974262	-21	kworker/u8:4+flush-259:0	21:35:24	0
3859725	99	23	20,2	cyclictest	3885721	-21	kworker/u8:4+flush-259:0	20:10:26	0
3859725	99	23	19,3	cyclictest	3968468	-21	kworker/u8:0+events_unbound	20:55:24	0
3859725	99	23	18,4	cyclictest	4094719	-21	latency_hist	22:55:01	0
3859729	99	22	17,3	cyclictest	509	-21	rs:main		1
3859729	99	22	17,3	cyclictest	252	-21	systemd-journal	20:02:27	1
3859729	99	22	16,4	cyclictest	4173017	-21	apt-get	00:10:12	1
3859729	99	22	16,4	cyclictest	4098944	-21	ntpq	22:55:20	1
3859725	99	22	18,3	cyclictest	3869709	-21	kworker/u8:1+events_unbound	19:45:13	0
3859725	99	22	0,20	cyclictest	1	-21	systemd	00:15:00	0
3859735	99	21	15,4	cyclictest	4188736	-21	cat	00:25:01	3
3859731	99	21	16,4	cyclictest	3900975	-21	apt-get	19:50:00	2
3859729	99	21	17,3	cyclictest	4120580	-21	kworker/u8:0+flush-259:0	23:55:26	1
3859729	99	21	14,5	cyclictest	4093804	-21	ntpq	22:50:21	1
3859725	99	21	16,4	cyclictest	3979456	-21	apt-get	21:05:11	0
3859735	99	20	16,3	cyclictest	4090203	-21	kworker/u8:2+flush-259:0	22:50:24	3
3859735	99	20	16,3	cyclictest	1665514	-21	kworker/u8:3+events_unbound	21:15:01	3
3859735	99	20	15,3	cyclictest	252	-21	systemd-journal	22:35:00	3
3859731	99	20	17,2	cyclictest	3974262	-21	kworker/u8:4+events_unbound	21:20:15	2
3859729	99	20	14,4	cyclictest	252	-21	systemd-journal	23:46:21	1
3859729	99	20	1,13	cyclictest	4120829	-21	idleruntime-cro	23:20:01	1
3859725	99	20	17,2	cyclictest	4032081	-21	kworker/u8:1+events_unbound	22:15:12	0
3859725	99	20	17,2	cyclictest	3968468	-21	kworker/u8:0+events_unbound	21:00:22	0
3859725	99	20	16,3	cyclictest	3974262	-21	kworker/u8:4+events_unbound	21:20:22	0
3859725	99	20	16,3	cyclictest	252	-21	systemd-journal	21:47:52	0
3859725	99	20	16,3	cyclictest	252	-21	systemd-journal	21:47:51	0
3859735	99	19	16,2	cyclictest	4078847	-21	kworker/u8:3+events_unbound	23:00:19	3
3859735	99	19	15,3	cyclictest	4032081	-21	kworker/u8:1+flush-259:0	22:15:17	3
3859735	99	19	14,3	cyclictest	4078847	-21	kworker/u8:3+flush-259:0	23:10:01	3
3859735	99	19	13,4	cyclictest	252	-21	systemd-journal	19:29:19	3
3859729	99	19	15,3	cyclictest	1665514	-21	kworker/u8:3+flush-259:0	20:20:10	1
3859729	99	19	14,4	cyclictest	4043025	-21	apt-get	22:05:12	1
3859729	99	19	14,4	cyclictest	3885721	-21	kworker/u8:4+flush-259:0	19:50:25	1
3859729	99	19	14,3	cyclictest	509	-21	rs:main		1
3859725	99	19	16,2	cyclictest	4120580	-21	kworker/u8:0+flush-259:0	23:40:17	0
3859725	99	19	15,3	cyclictest	3932098	-21	kworker/u8:0+flush-259:0	20:25:26	0
3859725	99	19	15,3	cyclictest	3895838	-21	kworker/u8:0+events_unbound	19:55:18	0
3859725	99	19	15,3	cyclictest	1665514	-21	kworker/u8:3+events_unbound	21:10:13	0
3859735	99	18	15,2	cyclictest	4042990	-21	kworker/u8:2+flush-259:0	22:30:01	3
3859735	99	18	14,3	cyclictest	4146999	-21	kworker/u8:2+events_unbound	00:35:17	3
3859735	99	18	13,4	cyclictest	4020911	-21	apt-get	21:44:59	3
3859731	99	18	3,8	cyclictest	4053068	-21	munin-plugin-st	22:15:00	2
3859731	99	18	14,3	cyclictest	3974262	-21	kworker/u8:4+flush-259:0	21:55:25	2
3859731	99	18	14,3	cyclictest	3895838	-21	kworker/u8:0+flush-259:0	19:55:00	2
3859731	99	18	14,2	cyclictest	0	-21	swapper/2	23:15:00	2
3859731	99	18	13,4	cyclictest	4120580	-21	kworker/u8:0+events_unbound	23:55:23	2
3859729	99	18	15,2	cyclictest	4187292	-21	ntp_kernel_err	00:20:21	1
3859729	99	18	14,2	cyclictest	0	-21	swapper/1	21:55:00	1
3859729	99	18	12,4	cyclictest	4183055	-21	latency_hist	00:20:01	1
3859729	99	18	12,4	cyclictest	4183055	-21	latency_hist	00:20:00	1
3859729	99	18	12,4	cyclictest	3869099	-21	ntpq	19:15:22	1
3859725	99	18	16,2	cyclictest	4078847	-21	kworker/u8:3+flush-259:0	23:28:22	0
3859725	99	18	16,1	cyclictest	3890636	-21	cron	19:40:00	0
3859725	99	18	15,2	cyclictest	3989773	-21	kworker/u8:0+flush-259:0	21:35:01	0
3859725	99	18	15,2	cyclictest	3922048	-21	kworker/u8:1+flush-259:0	20:30:15	0
3859725	99	18	15,2	cyclictest	3885721	-21	kworker/u8:4+events_unbound	19:50:19	0
3859725	99	18	15,2	cyclictest	3865534	-21	irqcore	19:15:18	0
3859725	99	18	15,2	cyclictest	1665514	-21	kworker/u8:3+events_unbound	20:05:00	0
3859725	99	18	14,3	cyclictest	4099861	-21	apt-get	23:00:02	0
3859725	99	18	14,3	cyclictest	4078847	-21	kworker/u8:3+flush-259:0	23:08:06	0
3859725	99	18	14,3	cyclictest	3932098	-21	kworker/u8:0+flush-259:0	20:37:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34