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 Fri Mar 06, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
870817	99	51	48,2	cyclictest	75	-21	kswapd0	12:07:42	3
870817	99	51	48,2	cyclictest	75	-21	kswapd0	12:07:42	3
870807	99	51	47,3	cyclictest	1177646	-21	kworker/u8:0+flush-259:0	12:07:59	0
870807	99	51	47,3	cyclictest	1177646	-21	kworker/u8:0+flush-259:0	12:07:59	0
870810	99	47	44,2	cyclictest	75	-21	kswapd0	12:07:41	1
870810	99	47	44,2	cyclictest	75	-21	kswapd0	12:07:41	1
870810	99	34	31,2	cyclictest	948763	-21	kworker/u8:0+flush-259:0	10:00:21	1
870810	99	33	30,2	cyclictest	948763	-21	kworker/u8:0+events_unbound	09:15:16	1
870817	99	32	25,5	cyclictest	1006299	-21	diskstats	09:20:13	3
870810	99	32	29,2	cyclictest	901772	-21	kworker/u8:1+flush-259:0	08:00:15	1
870817	99	31	25,4	cyclictest	1069104	-21	/usr/sbin/munin	10:20:14	3
870810	99	31	28,2	cyclictest	948763	-21	kworker/u8:0+flush-259:0	09:45:16	1
870810	99	30	27,2	cyclictest	928271	-21	kworker/u8:3+events_unbound	08:35:21	1
870815	99	28	25,2	cyclictest	75	-21	kswapd0	12:07:42	2
870815	99	28	25,2	cyclictest	75	-21	kswapd0	12:07:42	2
870807	99	28	24,3	cyclictest	1198321	-21	kworker/u8:2+flush-259:0	12:25:15	0
870810	99	27	25,2	cyclictest	959472	-21	kworker/u8:2+flush-259:0	09:10:16	1
870810	99	27	23,2	cyclictest	1161784	-21	kworker/u8:4+flush-259:0	11:55:00	1
870807	99	27	1,24	cyclictest	1042368	-21	munin-run	09:55:01	0
870810	99	26	23,2	cyclictest	948763	-21	kworker/u8:0+events_unbound	09:25:15	1
870810	99	26	21,4	cyclictest	916771	-21	ntpq	07:50:21	1
870810	99	25	19,5	cyclictest	1093642	-21	ntpq	10:40:20	1
870810	99	24	22,1	cyclictest	948763	-21	kworker/u8:0+events_unbound	10:20:21	1
870810	99	24	21,2	cyclictest	1146335	-21	apt-get	11:35:10	1
870810	99	24	21,2	cyclictest	1074030	-21	kworker/u8:3+events_unbound	11:20:19	1
870810	99	24	20,3	cyclictest	1198535	-21	kworker/u8:4+flush-259:0	12:35:14	1
870810	99	24	19,4	cyclictest	1099993	-21	apt-get	10:50:14	1
870807	99	24	20,3	cyclictest	928271	-21	kworker/u8:3+flush-259:0	08:35:16	0
870807	99	24	20,3	cyclictest	1181688	-21	kworker/u8:3+events_unbound	12:15:17	0
870807	99	24	19,4	cyclictest	1001115	-21	diskstats	09:15:15	0
870815	99	23	20,2	cyclictest	1198569	-21	apt-get	12:25:12	2
870810	99	23	20,2	cyclictest	969787	-21	kworker/u8:1+flush-259:0	08:50:01	1
870810	99	23	20,2	cyclictest	152928	-21	kworker/u8:2+events_unbound	07:35:17	1
870810	99	23	20,2	cyclictest	1181688	-21	kworker/u8:3+events_unbound	12:10:15	1
870810	99	23	20,2	cyclictest	1181688	-21	kworker/u8:3+events_unbound	12:10:15	1
870810	99	23	20,2	cyclictest	1115170	-21	kworker/u8:2+events_unbound	11:40:23	1
870810	99	23	20,2	cyclictest	1042348	-21	gpgv	09:54:59	1
870807	99	23	20,2	cyclictest	1187798	-21	kworker/u8:2+flush-259:0	12:15:00	0
870807	99	23	20,2	cyclictest	1187798	-21	kworker/u8:2+flush-259:0	12:15:00	0
870807	99	23	20,2	cyclictest	1074030	-21	kworker/u8:3+flush-259:0	11:20:17	0
870807	99	23	16,5	cyclictest	875035	-21	ntpq	07:10:20	0
870815	99	22	15,5	cyclictest	252	-21	systemd-journal	11:39:40	2
870810	99	22	20,2	cyclictest	1198321	-21	kworker/u8:2+flush-259:0	12:30:15	1
870810	99	22	19,2	cyclictest	959472	-21	kworker/u8:2+events_unbound	09:00:19	1
870810	99	22	18,3	cyclictest	959472	-21	kworker/u8:2+flush-259:0	08:40:10	1
870810	99	22	18,3	cyclictest	865834	-21	kworker/u8:0+events_unbound	07:10:18	1
870807	99	22	16,4	cyclictest	890579	-21	ntpq	07:25:21	0
870807	99	22	16,4	cyclictest	890579	-21	ntpq	07:25:20	0
870807	99	22	1,20	cyclictest	1	-21	systemd	11:01:40	0
870817	99	21	15,4	cyclictest	1193429	-21	apt-get	12:20:11	3
870815	99	21	16,3	cyclictest	886267	-21	latency_hist	07:25:01	2
870810	99	21	19,2	cyclictest	959472	-21	kworker/u8:2+events_unbound	09:05:23	1
870810	99	21	18,2	cyclictest	1198321	-21	kworker/u8:2+events_unbound	12:25:18	1
870810	99	21	18,1	cyclictest	0	-21	swapper/1	08:00:01	1
870810	99	21	17,3	cyclictest	948763	-21	kworker/u8:0+events_unbound	11:15:19	1
870810	99	21	17,3	cyclictest	1115170	-21	kworker/u8:2+events_unbound	12:00:22	1
870810	99	21	17,3	cyclictest	1011039	-21	kworker/u8:2+flush-259:0	09:30:20	1
870807	99	21	18,2	cyclictest	865834	-21	kworker/u8:0+events_unbound	07:40:15	0
870807	99	21	17,3	cyclictest	1115170	-21	kworker/u8:2+flush-259:0	11:40:20	0
870817	99	20	16,2	cyclictest	0	-21	swapper/3	07:40:00	3
870815	99	20	16,3	cyclictest	1074030	-21	kworker/u8:3+flush-259:0	10:50:19	2
870815	99	20	16,3	cyclictest	1042317	-21	sh	09:54:59	2
870815	99	20	15,4	cyclictest	959472	-21	kworker/u8:2+flush-259:0	08:40:15	2
870815	99	20	13,5	cyclictest	896615	-21	latency_hist	07:35:01	2
870810	99	20	17,2	cyclictest	928271	-21	kworker/u8:3+flush-259:0	08:20:21	1
870807	99	20	17,2	cyclictest	1074030	-21	kworker/u8:3+events_unbound	11:30:24	0
870807	99	20	17,2	cyclictest	1031595	-21	kworker/u8:1+events_unbound	09:55:15	0
870807	99	20	16,3	cyclictest	959472	-21	kworker/u8:2+events_unbound	08:40:12	0
870807	99	20	16,3	cyclictest	1031595	-21	kworker/u8:1+flush-259:0	10:40:22	0
870807	99	20	15,4	cyclictest	1084262	-21	latency_hist	10:35:01	0
870817	99	19	14,3	cyclictest	1104869	-21	kworker/u8:1+flush-259:0	10:55:25	3
870817	99	19	13,4	cyclictest	1166760	-21	latency_hist	11:55:00	3
870817	99	19	11,6	cyclictest	1063815	-21	cat	10:15:01	3
870810	99	19	16,2	cyclictest	938405	-21	kworker/u8:1+events_unbound	08:15:16	1
870810	99	19	16,2	cyclictest	928271	-21	kworker/u8:3+flush-259:0	08:05:24	1
870810	99	19	16,2	cyclictest	865834	-21	kworker/u8:0+flush-259:0	07:25:53	1
870810	99	19	16,2	cyclictest	865834	-21	kworker/u8:0+flush-259:0	07:25:52	1
870810	99	19	16,2	cyclictest	1104869	-21	kworker/u8:1+flush-259:0	10:55:21	1
870810	99	19	16,2	cyclictest	1031595	-21	kworker/u8:1+flush-259:0	10:25:24	1
870810	99	19	15,3	cyclictest	969787	-21	kworker/u8:1+events_unbound	09:20:20	1
870807	99	19	15,3	cyclictest	948763	-21	kworker/u8:0+events_unbound	10:10:20	0
870807	99	19	15,3	cyclictest	1156410	-21	kworker/u8:1+flush-259:0	11:50:20	0
870817	99	18	15,2	cyclictest	980130	-21	latency_hist	08:55:01	3
870817	99	18	13,4	cyclictest	152928	-21	kworker/u8:2+flush-259:0	07:25:01	3
870817	99	18	12,5	cyclictest	1078272	-21	ntpq	10:25:22	3
870817	99	18	12,4	cyclictest	943573	-21	latency_hist	08:20:00	3
870810	99	18	15,2	cyclictest	1181688	-21	kworker/u8:3+events_unbound	12:15:15	1
870810	99	18	14,3	cyclictest	948763	-21	kworker/u8:0+flush-259:0	10:30:15	1
870810	99	18	14,3	cyclictest	1161784	-21	kworker/u8:4+flush-259:0	11:55:21	1
870807	99	18	15,2	cyclictest	959472	-21	kworker/u8:2+flush-259:0	08:50:21	0
870807	99	18	15,2	cyclictest	928271	-21	kworker/u8:3+flush-259:0	08:28:56	0
870807	99	18	15,2	cyclictest	1074030	-21	kworker/u8:3+events_unbound	10:50:23	0
870807	99	18	14,3	cyclictest	948763	-21	kworker/u8:0+events_unbound	11:47:40	0
870807	99	18	14,3	cyclictest	948763	-21	kworker/u8:0+events_unbound	10:15:11	0
870807	99	18	14,3	cyclictest	1181688	-21	kworker/u8:3+events_unbound	12:20:26	0
870807	99	18	1,15	cyclictest	252	-21	systemd-journal	12:05:00	0
870817	99	17	14,2	cyclictest	0	-21	swapper/3	08:30:01	3
870817	99	17	10,5	cyclictest	907429	-21	cat	07:45:01	3
870815	99	17	13,3	cyclictest	1099722	-21	sh	10:50:00	2
870815	99	17	10,5	cyclictest	907054	-21	cat	07:45:01	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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