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 Sat Jul 25, 2026 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3668596	99	43	37,4	cyclictest	3699750	-21	latency_hist	07:40:01	1
3668605	99	40	35,3	cyclictest	3855741	-21	apt-get	10:10:13	3
3668605	99	40	33,4	cyclictest	509	-21	rs:main		3
3668599	99	39	35,3	cyclictest	3798403	-21	base64	09:15:01	2
3668592	99	39	32,5	cyclictest	3840368	-21	diskstats	09:55:15	0
3668605	99	38	32,4	cyclictest	335557	-21	systemd-journal	10:45:44	3
3668599	99	38	34,2	cyclictest	3974682	-21	gpgv	12:05:00	2
3668596	99	38	31,5	cyclictest	3964339	-21	latency_hist	11:55:00	1
3668605	99	36	30,4	cyclictest	3679116	-21	latency_hist	07:20:00	3
3668599	99	35	31,3	cyclictest	3871224	-21	/usr/sbin/munin	10:25:16	2
3668596	99	35	29,4	cyclictest	3797796	-21	apt-get	09:15:00	1
3668599	99	34	31,2	cyclictest	3751691	-21	apt-get	08:30:14	2
3668596	99	34	28,4	cyclictest	3932076	-21	ntpq	11:20:22	1
3668592	99	33	30,2	cyclictest	3860859	-21	kworker/u8:0+flush-259:0	11:05:00	0
3668592	99	33	30,2	cyclictest	3630358	-21	kworker/u8:1+flush-259:0	07:19:59	0
3668605	99	32	26,4	cyclictest	3735941	-21	latency_hist	08:15:01	3
3668599	99	32	28,3	cyclictest	3917498	-21	latency_hist	11:10:01	2
3668599	99	31	27,3	cyclictest	3917537	-21	kworker/u8:2+flush-259:0	11:45:16	2
3668592	99	31	29,2	cyclictest	3798459	-21	kworker/u8:3+events_unbound	09:15:15	0
3668592	99	31	28,2	cyclictest	3614655	-21	kworker/u8:0+events_unbound	07:23:30	0
3668592	99	31	26,3	cyclictest	3668668	-21	cat	07:10:01	0
3668592	99	30	26,3	cyclictest	3777458	-21	apt-get	08:55:12	0
3668599	99	29	26,2	cyclictest	3819383	-21	kworker/u8:3+flush-259:0	09:45:18	2
3668596	99	28	25,2	cyclictest	3860859	-21	kworker/u8:0+flush-259:0	10:20:25	1
3668596	99	28	25,2	cyclictest	3669345	-21	kworker/u8:2+flush-259:0	07:15:01	1
3668596	99	28	23,3	cyclictest	3819383	-21	kworker/u8:3+flush-259:0	09:55:19	1
3668592	99	28	25,3	cyclictest	3860859	-21	kworker/u8:0+events_unbound	10:44:29	0
3668592	99	28	24,3	cyclictest	3824778	-21	apt-get	09:40:11	0
3668592	99	28	22,4	cyclictest	335557	-21	systemd-journal	07:35:01	0
3668605	99	27	22,4	cyclictest	3891896	-21	kworker/u8:4+flush-259:0	11:00:00	3
3668599	99	27	23,3	cyclictest	335557	-21	systemd-journal	07:29:50	2
3668592	99	27	24,2	cyclictest	3746276	-21	kworker/u8:1+events_unbound	09:25:15	0
3668592	99	27	22,4	cyclictest	3958311	-21	ntpq	11:45:21	0
3668592	99	27	22,4	cyclictest	3704015	-21	ntpq	07:40:21	0
3668592	99	27	1,24	cyclictest	509	-21	rs:main		0
3668605	99	26	20,4	cyclictest	3730795	-21	latency_hist	08:10:01	3
3668605	99	26	19,5	cyclictest	4011214	-21	latency_hist	12:40:01	3
3668599	99	26	23,2	cyclictest	3746276	-21	kworker/u8:1+events_unbound	08:30:01	2
3668599	99	26	22,3	cyclictest	3917537	-21	kworker/u8:2+events_unbound	11:41:28	2
3668599	99	26	22,3	cyclictest	3787518	-21	kworker/u8:0+events_unbound	09:30:24	2
3668596	99	26	22,3	cyclictest	3746276	-21	kworker/u8:1+events_unbound	09:00:30	1
3668596	99	26	22,2	cyclictest	3725890	-21	apt-get	08:05:15	1
3668592	99	26	20,4	cyclictest	3885695	-21	ntpq	10:35:25	0
3668605	99	25	21,3	cyclictest	3881568	-21	kworker/u8:3+flush-259:0	10:45:01	3
3668605	99	25	19,4	cyclictest	3942390	-21	ntpq	11:30:23	3
3668599	99	25	22,2	cyclictest	3808586	-21	kworker/u8:2+events_unbound	10:30:22	2
3668599	99	25	21,3	cyclictest	3725893	-21	kworker/u8:0+events_unbound	08:19:28	2
3668596	99	25	22,3	cyclictest	3669345	-21	kworker/u8:2+events_unbound	08:25:00	1
3668596	99	25	20,4	cyclictest	3922912	-21	apt-get	11:15:13	1
3668592	99	25	19,4	cyclictest	3938106	-21	latency_hist	11:30:00	0
3668605	99	24	19,3	cyclictest	335557	-21	systemd-journal	08:35:00	3
3668605	99	24	18,4	cyclictest	335557	-21	systemd-journal	08:29:27	3
3668599	99	24	21,2	cyclictest	3630358	-21	kworker/u8:1+flush-259:0	07:20:21	2
3668599	99	24	18,4	cyclictest	3673966	-21	latency_hist	07:15:01	2
3668596	99	24	21,2	cyclictest	3630358	-21	kworker/u8:1+events_unbound	07:30:15	1
3668596	99	24	20,3	cyclictest	3746276	-21	kworker/u8:1+flush-259:0	08:30:21	1
3668592	99	24	21,2	cyclictest	3974603	-21	kworker/u8:2+events_unbound	12:20:00	0
3668605	99	23	20,2	cyclictest	3829691	-21	kworker/u8:1+flush-259:0	10:05:00	3
3668605	99	23	17,4	cyclictest	3834806	-21	latency_hist	09:50:01	3
3668605	99	23	17,4	cyclictest	3797801	-21	latency_hist	09:15:01	3
3668599	99	23	16,5	cyclictest	3719537	-21	ntpq	07:55:21	2
3668596	99	23	19,3	cyclictest	3943313	-21	gpgv	11:35:00	1
3668596	99	23	19,3	cyclictest	3829691	-21	kworker/u8:1+flush-259:0	10:15:26	1
3668592	99	23	19,3	cyclictest	3917537	-21	kworker/u8:2+events_unbound	11:50:21	0
3668592	99	23	19,3	cyclictest	3819383	-21	kworker/u8:3+events_unbound	10:10:25	0
3668592	99	23	19,3	cyclictest	3766923	-21	kworker/u8:2+events_unbound	08:49:19	0
3668592	99	23	18,3	cyclictest	335557	-21	systemd-journal	12:33:29	0
3668592	99	23	17,4	cyclictest	3819364	-21	latency_hist	09:35:01	0
3668605	99	22	16,4	cyclictest	3980276	-21	latency_hist	12:10:00	3
3668599	99	22	19,3	cyclictest	3990207	-21	kworker/u8:0+events_unbound	12:30:29	2
3668599	99	22	19,2	cyclictest	3860859	-21	kworker/u8:0+events_unbound	10:43:29	2
3668599	99	22	18,3	cyclictest	3932978	-21	kworker/u8:1+events_unbound	11:30:29	2
3668596	99	22	20,2	cyclictest	3829691	-21	kworker/u8:1+events_unbound	10:25:24	1
3668596	99	22	19,2	cyclictest	3630358	-21	kworker/u8:1+flush-259:0	07:20:26	1
3668596	99	22	18,3	cyclictest	3974603	-21	kworker/u8:2+flush-259:0	12:05:20	1
3668592	99	22	19,2	cyclictest	3819383	-21	kworker/u8:3+events_unbound	09:45:19	0
3668592	99	22	19,2	cyclictest	3766923	-21	kworker/u8:2+flush-259:0	08:50:27	0
3668592	99	22	18,3	cyclictest	3881568	-21	kworker/u8:3+events_unbound	10:49:29	0
3668592	99	22	18,3	cyclictest	3725893	-21	kworker/u8:0+events_unbound	08:20:28	0
3668592	99	22	17,4	cyclictest	3669057	-21	apt-get	07:10:11	0
3668592	99	22	17,4	cyclictest	335557	-21	systemd-journal	09:40:00	0
3668592	99	22	16,4	cyclictest	3864897	-21	ntpq	10:15:21	0
3668605	99	21	18,2	cyclictest	3787518	-21	kworker/u8:0+flush-259:0	09:20:19	3
3668599	99	21	18,2	cyclictest	3917537	-21	kworker/u8:2+events_unbound	11:23:31	2
3668599	99	21	18,2	cyclictest	3891896	-21	kworker/u8:4+flush-259:0	10:50:23	2
3668599	99	21	17,3	cyclictest	3819383	-21	kworker/u8:3+flush-259:0	09:40:22	2
3668599	99	21	17,3	cyclictest	3819383	-21	kworker/u8:3+events_unbound	10:10:19	2
3668599	99	21	17,3	cyclictest	3669345	-21	kworker/u8:2+events_unbound	07:15:23	2
3668599	99	21	17,3	cyclictest	3630358	-21	kworker/u8:1+events_unbound	07:37:28	2
3668596	99	21	20,1	cyclictest	3990207	-21	kworker/u8:0+flush-259:0	12:20:28	1
3668596	99	21	17,3	cyclictest	3798459	-21	kworker/u8:3+flush-259:0	09:15:14	1
3668596	99	21	16,4	cyclictest	3756818	-21	/usr/sbin/munin	08:35:15	1
3668592	99	21	18,2	cyclictest	500	-21	systemd-logind	12:40:00	0
3668592	99	21	18,2	cyclictest	3669345	-21	kworker/u8:2+events_unbound	07:45:24	0
3668592	99	21	18,1	cyclictest	0	-21	swapper/0	09:04:59	0
3668592	99	21	17,3	cyclictest	3932978	-21	kworker/u8:1+events_unbound	11:55:23	0
3668605	99	20	17,2	cyclictest	3829652	-21	cron	09:45:00	3
3668605	99	20	16,3	cyclictest	3829691	-21	kworker/u8:1+flush-259:0	10:35:00	3
3668605	99	20	14,4	cyclictest	3746276	-21	kworker/u8:1+events_unbound	09:00:20	3
3668599	99	20	16,3	cyclictest	3819383	-21	kworker/u8:3+events_unbound	10:05:24	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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