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 Wed Aug 19, 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
3828700	99	59	55,3	cyclictest	4151811	-21	gpgv	00:20:00	1
3828695	99	59	57,1	cyclictest	75	-21	kswapd0	22:15:02	0
3828703	99	52	47,4	cyclictest	3964648	-21	kworker/u8:0+flush-259:0	21:40:24	2
3828703	99	52	47,3	cyclictest	3907512	-21	kworker/u8:0+flush-259:0	20:40:00	2
3828703	99	48	43,4	cyclictest	3907512	-21	kworker/u8:0+flush-259:0	20:45:01	2
3828695	99	47	40,5	cyclictest	335557	-21	systemd-journal	22:35:24	0
3828705	99	45	42,2	cyclictest	3823696	-21	kworker/u8:4+flush-259:0	21:00:01	3
3828705	99	40	37,2	cyclictest	3964648	-21	kworker/u8:0+flush-259:0	22:10:00	3
3828703	99	40	36,3	cyclictest	3860125	-21	kworker/u8:0+flush-259:0	20:00:27	2
3828705	99	39	35,3	cyclictest	4016825	-21	kworker/u8:2+flush-259:0	22:30:24	3
3828700	99	39	34,4	cyclictest	4037976	-21	apt-get	22:30:12	1
3828700	99	39	34,4	cyclictest	335557	-21	systemd-journal	19:25:55	1
3828705	99	37	34,2	cyclictest	4006516	-21	kworker/u8:1+flush-259:0	22:00:26	3
3828695	99	37	30,6	cyclictest	4110270	-21	kworker/u8:2+flush-259:0	00:15:01	0
3828695	99	37	30,6	cyclictest	4110270	-21	kworker/u8:2+flush-259:0	00:15:00	0
3828695	99	36	31,4	cyclictest	3828878	-21	/usr/sbin/munin	19:10:15	0
3828705	99	35	32,2	cyclictest	3865472	-21	kworker/u8:3+flush-259:0	19:50:18	3
3828705	99	35	31,3	cyclictest	75	-21	kswapd0	22:15:02	3
3828705	99	35	29,3	cyclictest	4151608	-21	latency_hist	00:20:00	3
3828703	99	35	31,2	cyclictest	3823696	-21	kworker/u8:4+flush-259:0	21:50:21	2
3828703	99	35	31,2	cyclictest	3823696	-21	kworker/u8:4+flush-259:0	21:50:21	2
3828700	99	35	30,3	cyclictest	3891759	-21	base64	20:10:00	1
3828700	99	35	29,4	cyclictest	3876283	-21	/usr/sbin/munin	19:55:17	1
3828695	99	34	31,2	cyclictest	3823696	-21	kworker/u8:4+flush-259:0	22:10:26	0
3828705	99	33	28,4	cyclictest	4053240	-21	latency_hist	22:45:01	3
3828705	99	33	27,5	cyclictest	3855195	-21	apt-get	19:35:13	3
3828700	99	33	28,4	cyclictest	3871152	-21	apt-get	19:50:12	1
3828695	99	33	28,3	cyclictest	335557	-21	systemd-journal	00:00:01	0
3828703	99	32	27,4	cyclictest	335557	-21	systemd-journal	23:10:00	2
3828700	99	32	29,2	cyclictest	3897147	-21	kworker/u8:2+flush-259:0	20:40:18	1
3828700	99	32	28,3	cyclictest	3970346	-21	kworker/u8:3+flush-259:0	21:35:20	1
3828700	99	32	27,3	cyclictest	3985863	-21	/usr/sbin/munin	21:40:14	1
3828703	99	31	27,3	cyclictest	4152264	-21	kworker/u8:4+flush-259:0	00:40:01	2
3828703	99	31	25,4	cyclictest	3844134	-21	latency_hist	19:25:01	2
3828700	99	31	27,3	cyclictest	3897147	-21	kworker/u8:2+flush-259:0	20:20:25	1
3828695	99	31	28,2	cyclictest	4110270	-21	kworker/u8:2+flush-259:0	00:00:29	0
3828695	99	31	28,2	cyclictest	3823696	-21	kworker/u8:4+events_unbound	20:55:01	0
3828705	99	30	26,3	cyclictest	4027608	-21	kworker/u8:3+flush-259:0	23:10:00	3
3828703	99	30	26,3	cyclictest	4022343	-21	base64	22:15:01	2
3828703	99	30	24,4	cyclictest	3892212	-21	cp	20:10:01	2
3828700	99	30	27,2	cyclictest	4110270	-21	kworker/u8:2+flush-259:0	23:50:18	1
3828700	99	30	25,3	cyclictest	3849557	-21	kworker/u8:2+flush-259:0	19:30:26	1
3828695	99	30	27,2	cyclictest	4037569	-21	kworker/u8:0+flush-259:0	23:15:16	0
3828705	99	29	25,3	cyclictest	4016825	-21	kworker/u8:2+flush-259:0	22:25:25	3
3828705	99	29	25,3	cyclictest	3823696	-21	kworker/u8:4+events_unbound	19:57:11	3
3828703	99	29	22,5	cyclictest	4011464	-21	latency_hist	22:05:01	2
3828700	99	29	26,2	cyclictest	3823696	-21	kworker/u8:4+flush-259:0	19:20:20	1
3828705	99	28	25,2	cyclictest	3938651	-21	kworker/u8:1+flush-259:0	21:05:24	3
3828703	99	28	22,2	cyclictest	4162442	-21	idleruntime-cro	00:30:00	2
3828700	99	28	24,3	cyclictest	335557	-21	systemd-journal	21:01:14	1
3828695	99	28	23,4	cyclictest	4114475	-21	ntpq	23:40:20	0
3828705	99	27	22,3	cyclictest	4136056	-21	latency_hist	00:05:00	3
3828700	99	27	23,2	cyclictest	4115666	-21	apt-get	23:45:14	1
3828700	99	27	21,4	cyclictest	4027377	-21	latency_hist	22:20:01	1
3828695	99	27	24,2	cyclictest	4130893	-21	kworker/u8:3+flush-259:0	00:05:29	0
3828695	99	27	21,4	cyclictest	3928279	-21	latency_hist	20:45:01	0
3828705	99	26	22,3	cyclictest	3964648	-21	kworker/u8:0+flush-259:0	21:55:00	3
3828705	99	26	22,3	cyclictest	3964648	-21	kworker/u8:0+flush-259:0	21:55:00	3
3828705	99	26	22,3	cyclictest	3780075	-21	kworker/u8:0+flush-259:0	19:30:00	3
3828705	99	26	21,3	cyclictest	4152264	-21	kworker/u8:4+flush-259:0	00:25:00	3
3828703	99	26	22,3	cyclictest	3780075	-21	kworker/u8:0+flush-259:0	19:20:00	2
3828703	99	26	22,2	cyclictest	3860353	-21	apt-get	19:40:15	2
3828695	99	26	23,2	cyclictest	3964648	-21	kworker/u8:0+events_unbound	21:55:24	0
3828705	99	25	18,5	cyclictest	4089545	-21	latency_hist	23:20:01	3
3828703	99	25	21,3	cyclictest	4146668	-21	apt-get	00:15:13	2
3828695	99	25	22,2	cyclictest	4110270	-21	kworker/u8:2+events_unbound	00:30:11	0
3828695	99	25	21,3	cyclictest	3897147	-21	kworker/u8:2+events_unbound	21:16:19	0
3828695	99	25	18,5	cyclictest	4084355	-21	latency_hist	23:15:01	0
3828695	99	25	0,24	cyclictest	1	-21	systemd	00:29:24	0
3828705	99	24	21,2	cyclictest	3938651	-21	kworker/u8:1+events_unbound	21:05:00	3
3828703	99	24	20,3	cyclictest	3823696	-21	kworker/u8:4+flush-259:0	20:15:26	2
3828700	99	24	19,4	cyclictest	4011701	-21	/usr/sbin/munin	22:05:15	1
3828700	99	24	19,4	cyclictest	3897147	-21	kworker/u8:2+flush-259:0	20:30:17	1
3828695	99	24	20,3	cyclictest	3780075	-21	kworker/u8:0+events_unbound	19:20:54	0
3828705	99	23	19,3	cyclictest	3897147	-21	kworker/u8:2+flush-259:0	20:45:24	3
3828703	99	23	19,3	cyclictest	4110270	-21	kworker/u8:2+flush-259:0	00:35:00	2
3828700	99	23	19,2	cyclictest	3823696	-21	kworker/u8:4+flush-259:0	21:30:18	1
3828695	99	23	19,3	cyclictest	3985644	-21	kworker/u8:2+events_unbound	21:46:26	0
3828695	99	23	19,3	cyclictest	3823696	-21	kworker/u8:4+events_unbound	21:12:25	0
3828705	99	22	19,2	cyclictest	3833819	-21	latency_hist	19:14:59	3
3828705	99	22	17,3	cyclictest	3897147	-21	kworker/u8:2+events_unbound	21:10:22	3
3828700	99	22	18,3	cyclictest	335557	-21	systemd-journal	00:36:25	1
3828700	99	22	17,3	cyclictest	3938893	-21	apt-get	20:55:13	1
3828695	99	22	18,3	cyclictest	3897147	-21	kworker/u8:2+events_unbound	20:49:24	0
3828695	99	22	18,3	cyclictest	3865472	-21	kworker/u8:3+events_unbound	19:51:25	0
3828695	99	22	18,3	cyclictest	3849557	-21	kworker/u8:2+flush-259:0	19:35:24	0
3828705	99	21	18,2	cyclictest	4037569	-21	kworker/u8:0+flush-259:0	22:55:24	3
3828705	99	21	18,2	cyclictest	3970346	-21	kworker/u8:3+events_unbound	21:35:22	3
3828705	99	21	18,2	cyclictest	3897147	-21	kworker/u8:2+events_unbound	20:30:19	3
3828705	99	21	15,4	cyclictest	4062743	-21	ntpq	22:50:22	3
3828703	99	21	17,3	cyclictest	3897147	-21	kworker/u8:2+flush-259:0	20:45:22	2
3828703	99	21	17,3	cyclictest	335557	-21	systemd-journal	22:10:00	2
3828703	99	21	16,4	cyclictest	4037569	-21	kworker/u8:0+flush-259:0	23:15:18	2
3828700	99	21	17,3	cyclictest	4120548	-21	kworker/u8:1+flush-259:0	00:25:17	1
3828700	99	21	17,3	cyclictest	4069065	-21	apt-get	23:00:14	1
3828700	99	21	17,3	cyclictest	3849557	-21	kworker/u8:2+flush-259:0	19:35:16	1
3828700	99	21	17,3	cyclictest	3823696	-21	kworker/u8:4+flush-259:0	19:43:29	1
3828695	99	21	18,2	cyclictest	3860125	-21	kworker/u8:0+events_unbound	20:05:28	0
3828695	99	21	17,3	cyclictest	4037569	-21	kworker/u8:0+events_unbound	23:30:01	0
3828695	99	21	17,3	cyclictest	4016825	-21	kworker/u8:2+events_unbound	22:45:12	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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