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 Tue Feb 10, 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
4070690	99	41	36,3	cyclictest	4174333	-21	apt-get	20:50:11	1
4070690	99	39	35,2	cyclictest	4153023	-21	kworker/u8:0+events_unbound	20:35:14	1
4070687	99	39	32,5	cyclictest	22323	-21	latency_hist	21:30:00	0
4070698	99	38	33,3	cyclictest	4179462	-21	kworker/u8:4+flush-259:0	21:15:17	3
4070698	99	36	30,4	cyclictest	125632	-21	apt-get	23:10:13	3
4070690	99	36	33,2	cyclictest	16277	-21	kworker/u8:1+events_unbound	22:50:16	1
4070687	99	35	29,3	cyclictest	1	-21	systemd	20:45:00	0
4070687	99	35	28,4	cyclictest	4080890	-21	latency_hist	19:20:01	0
4070694	99	33	31,2	cyclictest	16277	-21	kworker/u8:1+events_unbound	22:15:02	2
4070694	99	33	30,2	cyclictest	4065517	-21	kworker/u8:1+events_unbound	19:26:56	2
4070690	99	33	30,2	cyclictest	3350312	-21	kworker/u8:5+flush-259:0	19:30:23	1
4070690	99	33	29,3	cyclictest	4101723	-21	kworker/u8:3+flush-259:0	19:50:25	1
4070690	99	33	29,3	cyclictest	125284	-21	kworker/u8:2+events_unbound	23:10:01	1
4070694	99	31	25,4	cyclictest	94439	-21	latency_hist	22:40:01	2
4070690	99	31	27,3	cyclictest	32403	-21	kworker/u8:3+events_unbound	21:50:14	1
4070690	99	30	27,2	cyclictest	27206	-21	kworker/u8:0+flush-259:0	21:55:24	1
4070687	99	30	27,2	cyclictest	4137584	-21	kworker/u8:3+flush-259:0	21:00:17	0
4070694	99	29	26,2	cyclictest	4179462	-21	kworker/u8:4+flush-259:0	21:05:00	2
4070694	99	29	25,3	cyclictest	27206	-21	kworker/u8:0+events_unbound	22:57:25	2
4070690	99	29	25,3	cyclictest	4153023	-21	kworker/u8:0+events_unbound	20:34:56	1
4070690	99	29	25,3	cyclictest	4086071	-21	kworker/u8:0+events_unbound	19:35:14	1
4070690	99	29	25,3	cyclictest	125284	-21	kworker/u8:2+events_unbound	23:45:12	1
4070694	99	28	25,2	cyclictest	130622	-21	gpgv	23:15:01	2
4070694	99	28	22,4	cyclictest	4163724	-21	latency_hist	20:40:01	2
4070690	99	28	25,2	cyclictest	4096345	-21	kworker/u8:2+flush-259:0	19:45:15	1
4070690	99	28	22,5	cyclictest	4101911	-21	diskstats	19:40:13	1
4070687	99	28	23,4	cyclictest	4184367	-21	apt-get	21:00:00	0
4070687	99	28	21,5	cyclictest	208261	-21	latency_hist	00:30:01	0
4070687	99	28	21,5	cyclictest	198409	-21	diskstats	00:20:14	0
4070690	99	27	26,1	cyclictest	27206	-21	kworker/u8:0+events_unbound	22:30:15	1
4070690	99	27	24,2	cyclictest	125284	-21	kworker/u8:2+flush-259:0	00:00:22	1
4070694	99	26	20,4	cyclictest	252	-21	systemd-journal	20:05:00	2
4070690	99	26	23,2	cyclictest	27206	-21	kworker/u8:0+events_unbound	22:45:14	1
4070690	99	26	23,2	cyclictest	187621	-21	kworker/u8:1+flush-259:0	00:25:23	1
4070690	99	26	22,3	cyclictest	4137584	-21	kworker/u8:3+flush-259:0	21:25:00	1
4070690	99	26	21,3	cyclictest	125284	-21	kworker/u8:2+events_unbound	23:20:16	1
4070687	99	26	22,2	cyclictest	4137813	-21	apt-get	20:15:12	0
4070698	99	25	19,4	cyclictest	252	-21	systemd-journal	21:00:00	3
4070690	99	25	21,3	cyclictest	53486	-21	apt-get	22:00:12	1
4070690	99	25	21,3	cyclictest	4096345	-21	kworker/u8:2+flush-259:0	19:55:21	1
4070690	99	25	21,3	cyclictest	177299	-21	kworker/u8:3+events_unbound	00:30:29	1
4070690	99	25	21,3	cyclictest	16277	-21	kworker/u8:1+events_unbound	22:25:20	1
4070690	99	25	19,4	cyclictest	1210	-21	latency_hist	21:10:00	1
4070687	99	25	0,23	cyclictest	1	-21	systemd	20:01:04	0
4070698	99	24	19,4	cyclictest	252	-21	systemd-journal	20:45:00	3
4070690	99	24	20,3	cyclictest	68869	-21	kworker/u8:4+events_unbound	22:15:28	1
4070690	99	24	20,3	cyclictest	4179462	-21	kworker/u8:4+flush-259:0	21:15:15	1
4070690	99	24	20,3	cyclictest	1906	-21	apt-get	21:10:12	1
4070690	99	24	19,4	cyclictest	161527	-21	kworker/u8:0+flush-259:0	00:10:27	1
4070690	99	24	19,3	cyclictest	27206	-21	kworker/u8:0+flush-259:0	21:40:20	1
4070690	99	24	18,4	cyclictest	120226	-21	latency_hist	23:05:00	1
4070690	99	24	17,5	cyclictest	27501	-21	latency_hist	21:35:01	1
4070687	99	24	20,3	cyclictest	161527	-21	kworker/u8:0+flush-259:0	00:15:16	0
4070687	99	24	19,4	cyclictest	2020136	-21	kworker/u8:3+flush-259:0	19:10:20	0
4070687	99	24	19,4	cyclictest	2020136	-21	kworker/u8:3+flush-259:0	19:10:20	0
4070687	99	24	18,4	cyclictest	141257	-21	latency_hist	23:25:01	0
4070687	99	24	17,5	cyclictest	4117189	-21	/usr/sbin/munin	19:55:15	0
4070687	99	24	16,6	cyclictest	4158594	-21	latency_hist	20:35:01	0
4070698	99	23	20,2	cyclictest	4101723	-21	kworker/u8:3+flush-259:0	19:55:17	3
4070694	99	23	20,2	cyclictest	125284	-21	kworker/u8:2+events_unbound	23:29:56	2
4070694	99	23	19,3	cyclictest	38020	-21	/usr/sbin/munin	21:45:13	2
4070694	99	23	18,4	cyclictest	4142971	-21	/usr/sbin/munin	20:20:15	2
4070690	99	23	21,1	cyclictest	161527	-21	kworker/u8:0+events_unbound	23:57:04	1
4070690	99	23	20,2	cyclictest	4173255	-21	kworker/u8:2+events_unbound	20:55:13	1
4070690	99	23	20,2	cyclictest	3350312	-21	kworker/u8:5+events_unbound	19:22:06	1
4070690	99	23	20,2	cyclictest	27206	-21	kworker/u8:0+events_unbound	22:05:25	1
4070690	99	23	20,2	cyclictest	16277	-21	kworker/u8:1+flush-259:0	23:15:25	1
4070690	99	23	19,3	cyclictest	4179462	-21	kworker/u8:4+events_unbound	21:00:14	1
4070690	99	23	19,3	cyclictest	4153023	-21	kworker/u8:0+flush-259:0	21:25:20	1
4070690	99	23	17,4	cyclictest	161861	-21	latency_hist	23:45:00	1
4070690	99	23	15,3	cyclictest	27206	-21	kworker/u8:0+events_unbound	22:55:21	1
4070687	99	23	17,4	cyclictest	146656	-21	/usr/sbin/munin	23:30:14	0
4070698	99	22	7,4	cyclictest	145608	-21	nvmesmart_nvme0	23:25:24	3
4070698	99	22	19,2	cyclictest	203152	-21	cut	00:25:01	3
4070698	99	22	17,4	cyclictest	4065517	-21	kworker/u8:1+flush-259:0	19:15:17	3
4070694	99	22	18,3	cyclictest	4117214	-21	apt-get	19:55:13	2
4070694	99	22	17,4	cyclictest	252	-21	systemd-journal	21:30:00	2
4070694	99	22	16,4	cyclictest	4116957	-21	latency_hist	19:55:01	2
4070690	99	22	18,3	cyclictest	4107053	-21	kworker/u8:0+events_unbound	20:15:33	1
4070690	99	22	18,3	cyclictest	4065517	-21	kworker/u8:1+flush-259:0	19:25:19	1
4070690	99	22	18,3	cyclictest	177299	-21	kworker/u8:3+flush-259:0	00:35:15	1
4070690	99	22	18,3	cyclictest	16277	-21	kworker/u8:1+events_unbound	21:45:03	1
4070687	99	22	17,3	cyclictest	4086071	-21	kworker/u8:0+events_unbound	19:35:18	0
4070687	99	22	16,4	cyclictest	32642	-21	latency_hist	21:40:00	0
4070698	99	21	5,5	cyclictest	104552	-21	modprobe	22:47:36	3
4070698	99	21	18,2	cyclictest	110173	-21	apt-get	22:55:15	3
4070694	99	21	15,4	cyclictest	252	-21	systemd-journal	23:22:04	2
4070690	99	21	18,2	cyclictest	2971	-21	cron	00:10:01	1
4070690	99	21	18,2	cyclictest	16277	-21	kworker/u8:1+flush-259:0	23:35:26	1
4070690	99	21	17,3	cyclictest	4065517	-21	kworker/u8:1+flush-259:0	19:15:25	1
4070690	99	21	17,3	cyclictest	21821	-21	kworker/u8:2+events_unbound	21:30:23	1
4070690	99	21	17,3	cyclictest	16277	-21	kworker/u8:1+events_unbound	23:50:26	1
4070687	99	21	17,3	cyclictest	16277	-21	kworker/u8:1+flush-259:0	21:55:20	0
4070698	99	20	7,7	cyclictest	5950	-21	ntpq	21:10:21	3
4070698	99	20	7,6	cyclictest	4091215	-21	munin-run	19:30:00	3
4070698	99	20	6,5	cyclictest	4159203	-21	if_enp0s30f4	20:35:16	3
4070698	99	20	5,9	cyclictest	161622	-21	taskset	23:42:22	3
4070698	99	20	5,5	cyclictest	47147	-21	/usr/sbin/munin	21:50:21	3
4070698	99	20	5,4	cyclictest	4105715	-21	ntpq	19:40:20	3
4070698	99	20	17,2	cyclictest	74069	-21	apt-get	22:20:13	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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