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 Sep 22, 2026 00:44:04)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3430962	99	55	49,4	cyclictest	3478684	-21	gpgv	19:55:00	3
3430958	99	52	45,5	cyclictest	3771028	-21	latency_hist	00:35:01	2
3430952	99	51	48,3	cyclictest	3393027	-21	kworker/u8:3+events_unbound	21:50:23	0
3430955	99	48	42,4	cyclictest	3656166	-21	base64	22:45:01	1
3430952	99	47	39,5	cyclictest	3682706	-21	diskstats	23:10:13	0
3430952	99	45	42,2	cyclictest	3393027	-21	kworker/u8:3+events_unbound	21:40:22	0
3430952	99	45	42,2	cyclictest	3393027	-21	kworker/u8:3+events_unbound	20:20:23	0
3430962	99	43	39,3	cyclictest	3562124	-21	kworker/u8:2+flush-259:0	21:25:11	3
3430952	99	43	39,3	cyclictest	3745225	-21	kworker/u8:0+events_unbound	00:20:14	0
3430952	99	43	39,3	cyclictest	3393027	-21	kworker/u8:3+events_unbound	22:30:26	0
3430958	99	42	36,4	cyclictest	3708430	-21	apt-get	23:35:11	2
3430958	99	42	36,4	cyclictest	3467473	-21	apt-get	19:45:01	2
3430955	99	40	34,5	cyclictest	3457307	-21	base64	19:35:00	1
3430952	99	40	37,2	cyclictest	3446388	-21	kworker/u8:0+events_unbound	19:27:01	0
3430952	99	40	36,3	cyclictest	3393027	-21	kworker/u8:3+events_unbound	20:55:19	0
3430962	99	39	34,4	cyclictest	3393027	-21	kworker/u8:3+flush-259:0	22:05:00	3
3430955	99	39	35,3	cyclictest	3467621	-21	kworker/u8:0+events_unbound	19:45:25	1
3430955	99	39	35,3	cyclictest	3393027	-21	kworker/u8:3+flush-259:0	21:55:25	1
3430952	99	39	32,5	cyclictest	3671080	-21	ntpq	22:55:23	0
3430952	99	39	31,6	cyclictest	3562338	-21	/usr/sbin/munin	21:15:15	0
3430958	99	37	29,5	cyclictest	3739811	-21	cp	00:05:00	2
3430952	99	37	33,3	cyclictest	3640695	-21	kworker/u8:1+events_unbound	23:30:17	0
3430955	99	36	33,2	cyclictest	3640695	-21	kworker/u8:1+events_unbound	23:25:15	1
3430952	99	36	32,3	cyclictest	3708208	-21	kworker/u8:3+events_unbound	00:28:31	0
3430952	99	36	32,3	cyclictest	3708208	-21	kworker/u8:3+events_unbound	00:03:31	0
3430952	99	36	32,3	cyclictest	3467621	-21	kworker/u8:0+events_unbound	19:45:14	0
3430952	99	36	31,3	cyclictest	3713345	-21	apt-get	23:40:00	0
3430952	99	36	31,3	cyclictest	3572454	-21	kworker/u8:0+events_unbound	22:08:30	0
3430958	99	35	29,4	cyclictest	335557	-21	systemd-journal	21:32:29	2
3430955	99	35	32,2	cyclictest	3656697	-21	apt-get	22:45:12	1
3430952	99	35	31,3	cyclictest	3745225	-21	kworker/u8:0+events_unbound	00:12:17	0
3430952	99	35	31,3	cyclictest	3708208	-21	kworker/u8:3+events_unbound	23:53:30	0
3430952	99	35	31,3	cyclictest	3572454	-21	kworker/u8:0+events_unbound	22:29:31	0
3430962	99	34	30,3	cyclictest	3682307	-21	kworker/u8:2+flush-259:0	23:25:00	3
3430962	99	34	30,3	cyclictest	3393027	-21	kworker/u8:3+flush-259:0	20:55:23	3
3430962	99	34	27,5	cyclictest	3650833	-21	latency_hist	22:40:01	3
3430955	99	34	29,4	cyclictest	3734760	-21	apt-get	00:00:13	1
3430955	99	34	28,4	cyclictest	3478199	-21	latency_hist	19:55:00	1
3430952	99	34	30,3	cyclictest	3393027	-21	kworker/u8:3+events_unbound	20:02:30	0
3430952	99	34	26,5	cyclictest	3461440	-21	ntpq	19:35:22	0
3430955	99	33	30,2	cyclictest	3562124	-21	kworker/u8:2+flush-259:0	21:25:10	1
3430955	99	33	29,3	cyclictest	3682546	-21	apt-get	23:10:11	1
3430952	99	33	30,2	cyclictest	3393027	-21	kworker/u8:3+events_unbound	20:14:29	0
3430952	99	33	29,3	cyclictest	3724115	-21	kworker/u8:2+events_unbound	00:05:28	0
3430952	99	33	29,3	cyclictest	3613988	-21	kworker/u8:2+events_unbound	22:12:27	0
3430952	99	33	29,3	cyclictest	3562124	-21	kworker/u8:2+events_unbound	21:25:01	0
3430952	99	33	29,3	cyclictest	3393027	-21	kworker/u8:3+events_unbound	20:47:15	0
3430958	99	32	29,2	cyclictest	3572454	-21	kworker/u8:0+events_unbound	22:05:13	2
3430958	99	32	27,3	cyclictest	3504028	-21	ntpq	20:15:22	2
3430955	99	32	29,2	cyclictest	3393027	-21	kworker/u8:3+events_unbound	20:25:14	1
3430955	99	32	26,4	cyclictest	3494324	-21	cp	20:10:00	1
3430958	99	31	25,4	cyclictest	3494687	-21	cp	20:10:01	2
3430955	99	31	27,3	cyclictest	3393027	-21	kworker/u8:3+events_unbound	19:10:23	1
3430955	99	31	26,4	cyclictest	3714027	-21	apt-get	23:40:10	1
3430952	99	31	28,2	cyclictest	3764805	-21	kworker/u8:2+events_unbound	00:37:17	0
3430952	99	31	28,2	cyclictest	3393027	-21	kworker/u8:3+events_unbound	20:25:19	0
3430952	99	31	27,3	cyclictest	3562124	-21	kworker/u8:2+events_unbound	21:22:03	0
3430958	99	30	26,3	cyclictest	3431179	-21	apt-get	19:10:13	2
3430958	99	30	25,4	cyclictest	335557	-21	systemd-journal	22:35:01	2
3430958	99	30	24,4	cyclictest	3745198	-21	latency_hist	00:10:01	2
3430952	99	30	27,2	cyclictest	3393027	-21	kworker/u8:3+events_unbound	22:42:29	0
3430952	99	30	27,2	cyclictest	3393027	-21	kworker/u8:3+events_unbound	19:18:30	0
3430958	99	29	25,3	cyclictest	3436082	-21	kworker/u8:2+flush-259:0	19:20:16	2
3430958	99	29	24,3	cyclictest	3745225	-21	kworker/u8:0+flush-259:0	00:20:17	2
3430955	99	29	25,2	cyclictest	3629512	-21	gpgv	22:20:01	1
3430952	99	29	26,2	cyclictest	3393027	-21	kworker/u8:3+events_unbound	21:11:31	0
3430962	99	28	23,3	cyclictest	3640695	-21	kworker/u8:1+flush-259:0	23:45:00	3
3430962	99	28	22,4	cyclictest	509	-21	rs:main		3
3430955	99	28	25,2	cyclictest	3708208	-21	kworker/u8:3+flush-259:0	00:15:26	1
3430955	99	28	23,3	cyclictest	335557	-21	systemd-journal	19:35:01	1
3430955	99	28	22,4	cyclictest	335557	-21	systemd-journal	22:05:28	1
3430952	99	28	24,3	cyclictest	3530737	-21	kworker/u8:1+events_unbound	20:52:00	0
3430955	99	27	20,5	cyclictest	335557	-21	systemd-journal	20:31:27	1
3430952	99	27	24,2	cyclictest	3745225	-21	kworker/u8:0+events_unbound	00:17:30	0
3430952	99	27	24,2	cyclictest	3656051	-21	kworker/u8:4+events_unbound	22:52:30	0
3430962	99	26	22,3	cyclictest	3436082	-21	kworker/u8:2+flush-259:0	19:15:24	3
3430958	99	26	22,3	cyclictest	3393027	-21	kworker/u8:3+events_unbound	19:40:21	2
3430955	99	26	23,2	cyclictest	3764805	-21	kworker/u8:2+flush-259:0	00:35:24	1
3430955	99	26	21,4	cyclictest	3505130	-21	/usr/sbin/munin	20:20:14	1
3430955	99	26	20,4	cyclictest	335557	-21	systemd-journal	22:10:29	1
3430962	99	25	21,2	cyclictest	3562124	-21	kworker/u8:2+flush-259:0	21:20:18	3
3430962	99	25	20,4	cyclictest	3393027	-21	kworker/u8:3+flush-259:0	19:40:25	3
3430962	99	25	19,4	cyclictest	3567252	-21	latency_hist	21:20:00	3
3430962	99	25	0,23	cyclictest	1	-21	systemd	22:15:29	3
3430958	99	25	21,3	cyclictest	3708208	-21	kworker/u8:3+events_unbound	23:55:13	2
3430958	99	25	21,3	cyclictest	3640695	-21	kworker/u8:1+events_unbound	22:35:20	2
3430958	99	25	20,4	cyclictest	335557	-21	systemd-journal	23:55:00	2
3430955	99	25	22,2	cyclictest	3640695	-21	kworker/u8:1+flush-259:0	22:50:16	1
3430955	99	25	21,3	cyclictest	3436082	-21	kworker/u8:2+flush-259:0	19:22:29	1
3430952	99	25	22,2	cyclictest	3682307	-21	kworker/u8:2+events_unbound	23:23:30	0
3430952	99	25	21,3	cyclictest	3764805	-21	kworker/u8:2+events_unbound	00:32:29	0
3430952	99	25	18,5	cyclictest	3661629	-21	latency_hist	22:50:00	0
3430962	99	24	19,3	cyclictest	3393027	-21	kworker/u8:3+flush-259:0	20:20:16	3
3430962	99	24	19,3	cyclictest	3393027	-21	kworker/u8:3+flush-259:0	19:25:17	3
3430955	99	24	22,1	cyclictest	3393027	-21	kworker/u8:3+events_unbound	21:35:11	1
3430955	99	24	21,2	cyclictest	3640695	-21	kworker/u8:1+flush-259:0	23:30:24	1
3430955	99	24	20,3	cyclictest	3708208	-21	kworker/u8:3+events_unbound	00:05:22	1
3430955	99	24	20,3	cyclictest	3393027	-21	kworker/u8:3+flush-259:0	20:00:30	1
3430955	99	24	19,4	cyclictest	3441214	-21	latency_hist	19:20:00	1
3430955	99	24	17,5	cyclictest	3750353	-21	latency_hist	00:15:01	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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