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 Mon Sep 28, 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
473963	99	59	53,4	cyclictest	661089	-21	apt-get	10:10:11	0
473966	99	52	46,4	cyclictest	561996	-21	/usr/sbin/munin	08:35:14	1
473969	99	49	43,4	cyclictest	567425	-21	base64	08:40:01	2
473969	99	47	41,4	cyclictest	619290	-21	/usr/sbin/munin	09:30:14	2
473973	99	45	41,3	cyclictest	697567	-21	kworker/u8:3+events_unbound	10:45:16	3
473973	99	43	40,2	cyclictest	535500	-21	kworker/u8:1+flush-259:0	08:35:23	3
473963	99	41	36,3	cyclictest	645584	-21	apt-get	09:55:12	0
473963	99	41	36,3	cyclictest	645584	-21	apt-get	09:55:11	0
473973	99	40	35,3	cyclictest	489240	-21	kworker/u8:0+flush-259:0	07:55:18	3
473966	99	39	36,2	cyclictest	430647	-21	kworker/u8:1+flush-259:0	07:40:22	1
473973	99	38	34,3	cyclictest	613872	-21	kworker/u8:4+events_unbound	09:50:23	3
473969	99	38	34,3	cyclictest	692085	-21	gpgv	10:40:00	2
473973	99	37	33,3	cyclictest	613872	-21	kworker/u8:4+flush-259:0	11:15:23	3
473973	99	37	32,4	cyclictest	2618172	-21	kworker/u8:4+flush-259:0	07:20:23	3
473966	99	37	32,3	cyclictest	614086	-21	/usr/sbin/munin	09:25:20	1
473966	99	37	31,4	cyclictest	754593	-21	latency_hist	11:40:01	1
473973	99	36	32,3	cyclictest	525315	-21	kworker/u8:2+flush-259:0	08:10:00	3
473973	99	36	32,2	cyclictest	780491	-21	latency_hist	12:05:00	3
473973	99	36	28,5	cyclictest	718374	-21	latency_hist	11:05:02	3
473973	99	35	32,2	cyclictest	718391	-21	kworker/u8:5+flush-259:0	11:25:24	3
473966	99	35	29,4	cyclictest	483361	-21	ntpq	07:15:20	1
473973	99	34	30,3	cyclictest	566947	-21	kworker/u8:2+events_unbound	09:05:15	3
473969	99	34	30,3	cyclictest	629228	-21	kworker/u8:0+flush-259:0	09:55:16	2
473969	99	34	30,3	cyclictest	629228	-21	kworker/u8:0+flush-259:0	09:55:16	2
473963	99	34	28,4	cyclictest	764081	-21	ntpq	11:45:21	0
473973	99	33	30,2	cyclictest	629228	-21	kworker/u8:0+flush-259:0	09:40:15	3
473973	99	33	29,3	cyclictest	629228	-21	kworker/u8:0+events_unbound	10:37:11	3
473966	99	33	30,2	cyclictest	566947	-21	kworker/u8:2+flush-259:0	10:10:24	1
473963	99	33	30,2	cyclictest	718391	-21	kworker/u8:5+flush-259:0	11:25:20	0
473973	99	32	31,1	cyclictest	613872	-21	kworker/u8:4+events_unbound	10:55:11	3
473973	99	32	28,3	cyclictest	629228	-21	kworker/u8:0+flush-259:0	11:10:21	3
473973	99	32	28,3	cyclictest	566947	-21	kworker/u8:2+events_unbound	10:40:24	3
473973	99	32	25,5	cyclictest	515228	-21	latency_hist	07:50:01	3
473966	99	32	28,3	cyclictest	525315	-21	kworker/u8:2+flush-259:0	08:15:25	1
473973	99	31	28,2	cyclictest	566947	-21	kworker/u8:2+flush-259:0	09:40:00	3
473973	99	30	26,3	cyclictest	629228	-21	kworker/u8:0+flush-259:0	10:05:12	3
473973	99	30	26,3	cyclictest	613871	-21	kworker/u8:3+events_unbound	09:30:13	3
473973	99	30	25,3	cyclictest	541097	-21	latency_hist	08:15:01	3
473969	99	30	26,3	cyclictest	629228	-21	kworker/u8:0+flush-259:0	10:05:23	2
473969	99	30	26,3	cyclictest	613872	-21	kworker/u8:4+events_unbound	09:25:25	2
473966	99	30	27,2	cyclictest	707920	-21	kworker/u8:2+events_unbound	12:35:26	1
473963	99	30	27,2	cyclictest	535500	-21	kworker/u8:1+flush-259:0	08:25:23	0
473973	99	29	25,3	cyclictest	613872	-21	kworker/u8:4+flush-259:0	10:00:20	3
473973	99	29	25,3	cyclictest	489240	-21	kworker/u8:0+flush-259:0	08:30:02	3
473966	99	29	26,2	cyclictest	765156	-21	kworker/u8:3+flush-259:0	12:15:18	1
473966	99	29	26,2	cyclictest	765156	-21	kworker/u8:3+flush-259:0	12:15:17	1
473966	99	29	26,2	cyclictest	566947	-21	kworker/u8:2+flush-259:0	09:15:27	1
473966	99	29	25,3	cyclictest	489240	-21	kworker/u8:0+events_unbound	08:50:14	1
473963	99	29	25,3	cyclictest	765156	-21	kworker/u8:3+flush-259:0	12:00:23	0
473963	99	29	25,3	cyclictest	707920	-21	kworker/u8:2+events_unbound	12:25:01	0
473963	99	29	23,4	cyclictest	629360	-21	latency_hist	09:40:00	0
473973	99	28	25,2	cyclictest	613872	-21	kworker/u8:4+events_unbound	09:25:28	3
473973	99	28	25,2	cyclictest	430647	-21	kworker/u8:1+flush-259:0	07:25:21	3
473973	99	28	25,2	cyclictest	430647	-21	kworker/u8:1+flush-259:0	07:25:20	3
473973	99	28	24,3	cyclictest	629228	-21	kworker/u8:0+flush-259:0	09:45:20	3
473973	99	28	24,3	cyclictest	430647	-21	kworker/u8:1+flush-259:0	07:30:21	3
473973	99	28	23,3	cyclictest	791067	-21	/usr/sbin/munin	12:15:22	3
473973	99	28	23,3	cyclictest	791067	-21	/usr/sbin/munin	12:15:21	3
473973	99	28	21,3	cyclictest	535500	-21	kworker/u8:1+events_unbound	08:25:20	3
473969	99	28	25,2	cyclictest	707920	-21	kworker/u8:2+flush-259:0	11:20:24	2
473966	99	28	23,3	cyclictest	708138	-21	/usr/sbin/munin	10:55:15	1
473966	99	28	21,5	cyclictest	733053	-21	ntpq	11:15:19	1
473973	99	27	24,2	cyclictest	629228	-21	kworker/u8:0+events_unbound	10:20:19	3
473969	99	27	24,2	cyclictest	718391	-21	kworker/u8:5+flush-259:0	11:25:16	2
473969	99	27	23,3	cyclictest	697808	-21	apt-get	10:45:11	2
473966	99	27	23,3	cyclictest	613872	-21	kworker/u8:4+flush-259:0	10:50:23	1
473966	99	27	23,3	cyclictest	613872	-21	kworker/u8:4+events_unbound	10:15:16	1
473973	99	26	20,4	cyclictest	765156	-21	kworker/u8:3+flush-259:0	11:55:24	3
473969	99	26	22,3	cyclictest	535500	-21	kworker/u8:1+flush-259:0	09:10:26	2
473966	99	26	20,4	cyclictest	775526	-21	/usr/sbin/munin	12:00:14	1
473963	99	26	21,3	cyclictest	593437	-21	apt-get	09:05:13	0
473973	99	25	22,2	cyclictest	535500	-21	kworker/u8:1+flush-259:0	08:40:18	3
473973	99	25	21,3	cyclictest	707920	-21	kworker/u8:2+events_unbound	12:30:15	3
473973	99	25	21,3	cyclictest	629228	-21	kworker/u8:0+events_unbound	09:55:21	3
473973	99	25	21,3	cyclictest	629228	-21	kworker/u8:0+events_unbound	09:55:21	3
473973	99	25	21,3	cyclictest	598352	-21	kworker/u8:3+flush-259:0	09:10:22	3
473973	99	25	21,3	cyclictest	598352	-21	kworker/u8:3+events_unbound	09:15:14	3
473973	99	25	21,3	cyclictest	582732	-21	kworker/u8:3+events_unbound	08:55:10	3
473973	99	25	21,3	cyclictest	489240	-21	kworker/u8:0+events_unbound	08:50:18	3
473973	99	25	20,4	cyclictest	744549	-21	apt-get	11:30:14	3
473973	99	25	20,4	cyclictest	566947	-21	kworker/u8:2+flush-259:0	09:00:21	3
473973	99	25	20,3	cyclictest	765156	-21	kworker/u8:3+flush-259:0	12:10:20	3
473969	99	25	21,3	cyclictest	660847	-21	kworker/u8:1+events_unbound	10:20:23	2
473969	99	25	19,4	cyclictest	335557	-21	systemd-journal	09:23:21	2
473966	99	25	21,3	cyclictest	629228	-21	kworker/u8:0+events_unbound	10:35:16	1
473966	99	25	19,4	cyclictest	655934	-21	apt-get	10:05:11	1
473963	99	25	21,3	cyclictest	520670	-21	apt-get	07:55:11	0
473973	99	24	21,2	cyclictest	707920	-21	kworker/u8:2+flush-259:0	11:45:18	3
473969	99	24	21,2	cyclictest	535500	-21	kworker/u8:1+flush-259:0	09:15:15	2
473969	99	24	20,3	cyclictest	535500	-21	kworker/u8:1+events_unbound	08:20:22	2
473969	99	24	20,2	cyclictest	765156	-21	kworker/u8:3+flush-259:0	12:20:17	2
473969	99	24	19,4	cyclictest	335557	-21	systemd-journal	09:50:00	2
473966	99	24	21,2	cyclictest	489240	-21	kworker/u8:0+events_unbound	07:55:16	1
473966	99	24	21,2	cyclictest	479102	-21	kworker/u8:2+flush-259:0	07:30:00	1
473966	99	24	21,2	cyclictest	479102	-21	kworker/u8:2+flush-259:0	07:30:00	1
473966	99	24	20,3	cyclictest	335557	-21	systemd-journal	08:30:14	1
473963	99	24	20,3	cyclictest	430647	-21	kworker/u8:1+flush-259:0	07:45:18	0
473963	99	24	19,3	cyclictest	430647	-21	kworker/u8:1+events_unbound	07:35:18	0
473969	99	23	20,2	cyclictest	707920	-21	kworker/u8:2+events_unbound	12:05:13	2
473969	99	23	20,2	cyclictest	489240	-21	kworker/u8:0+flush-259:0	08:30:21	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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