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 Thu May 28, 2026 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3135741	99	44	40,3	cyclictest	3266082	-21	kworker/u8:4+flush-259:0	21:39:31	1
3135737	99	44	37,5	cyclictest	3322581	-21	latency_hist	22:10:01	0
3135741	99	42	38,3	cyclictest	3369701	-21	apt-get	22:55:12	1
3135741	99	39	36,2	cyclictest	3229639	-21	kworker/u8:3+events_unbound	20:41:32	1
3135741	99	39	36,2	cyclictest	3193018	-21	kworker/u8:0+events_unbound	20:20:18	1
3135741	99	39	35,3	cyclictest	3379785	-21	kworker/u8:1+events_unbound	23:13:32	1
3135737	99	39	35,3	cyclictest	3442583	-21	apt-get	00:05:12	0
3135743	99	38	32,4	cyclictest	3332908	-21	latency_hist	22:20:01	2
3135741	99	38	35,2	cyclictest	3140910	-21	kworker/u8:4+events_unbound	19:18:32	1
3135741	99	38	34,3	cyclictest	551483	-21	kworker/u8:1+events_unbound	20:31:20	1
3135741	99	37	34,2	cyclictest	3281637	-21	kworker/u8:0+events_unbound	21:45:23	1
3135741	99	37	33,3	cyclictest	3390135	-21	kworker/u8:0+events_unbound	23:48:31	1
3135741	99	36	33,2	cyclictest	3379785	-21	kworker/u8:1+events_unbound	23:19:32	1
3135741	99	36	33,2	cyclictest	3348425	-21	kworker/u8:1+events_unbound	22:35:33	1
3135741	99	36	33,2	cyclictest	3219497	-21	kworker/u8:2+events_unbound	20:37:32	1
3135741	99	36	33,2	cyclictest	3140910	-21	kworker/u8:4+events_unbound	19:30:24	1
3135741	99	36	32,3	cyclictest	3364460	-21	kworker/u8:4+events_unbound	23:00:33	1
3135741	99	36	32,3	cyclictest	3348425	-21	kworker/u8:1+events_unbound	22:31:32	1
3135737	99	36	29,5	cyclictest	3379759	-21	latency_hist	23:05:01	0
3135743	99	35	28,4	cyclictest	3281410	-21	latency_hist	21:30:00	2
3135741	99	35	32,2	cyclictest	3281637	-21	kworker/u8:0+events_unbound	21:50:12	1
3135741	99	35	32,2	cyclictest	3250528	-21	kworker/u8:2+events_unbound	21:10:19	1
3135741	99	35	32,2	cyclictest	3186970	-21	kworker/u8:2+events_unbound	20:00:14	1
3135741	99	35	32,2	cyclictest	3140910	-21	kworker/u8:4+events_unbound	19:49:31	1
3135741	99	35	32,2	cyclictest	3097678	-21	kworker/u8:3+events_unbound	19:14:33	1
3135741	99	35	31,3	cyclictest	3447480	-21	kworker/u8:2+events_unbound	00:18:32	1
3135741	99	35	31,3	cyclictest	3379992	-21	kworker/u8:2+events_unbound	23:23:32	1
3135741	99	35	31,3	cyclictest	3312298	-21	kworker/u8:0+events_unbound	22:26:31	1
3135741	99	34	31,2	cyclictest	551483	-21	kworker/u8:1+events_unbound	20:45:13	1
3135741	99	34	31,2	cyclictest	3338108	-21	kworker/u8:3+events_unbound	22:45:23	1
3135741	99	34	31,2	cyclictest	3306835	-21	kworker/u8:2+events_unbound	22:06:26	1
3135747	99	33	28,3	cyclictest	3306835	-21	kworker/u8:2+flush-259:0	22:00:15	3
3135747	99	33	27,4	cyclictest	3473253	-21	latency_hist	00:35:01	3
3135741	99	33	30,2	cyclictest	3312298	-21	kworker/u8:0+events_unbound	22:02:31	1
3135741	99	33	30,2	cyclictest	3186970	-21	kworker/u8:2+events_unbound	20:14:31	1
3135741	99	33	29,3	cyclictest	3447480	-21	kworker/u8:2+events_unbound	00:13:31	1
3135741	99	33	29,3	cyclictest	3291915	-21	kworker/u8:1+events_unbound	22:11:29	1
3135743	99	32	26,4	cyclictest	3462926	-21	latency_hist	00:25:01	2
3135741	99	32	29,2	cyclictest	551483	-21	kworker/u8:1+events_unbound	21:00:32	1
3135741	99	32	29,2	cyclictest	3291915	-21	kworker/u8:1+events_unbound	22:15:17	1
3135741	99	32	29,2	cyclictest	3229639	-21	kworker/u8:3+events_unbound	21:26:12	1
3135737	99	32	27,3	cyclictest	3291947	-21	apt-get	21:40:11	0
3135747	99	31	27,3	cyclictest	551483	-21	kworker/u8:1+flush-259:0	20:59:59	3
3135747	99	31	27,3	cyclictest	3343733	-21	gpgv	22:30:01	3
3135747	99	31	27,3	cyclictest	3146308	-21	/usr/sbin/munin	19:20:19	3
3135743	99	31	26,4	cyclictest	3213885	-21	gpgv	20:25:01	2
3135741	99	31	28,2	cyclictest	3291915	-21	kworker/u8:1+events_unbound	22:20:24	1
3135741	99	31	28,2	cyclictest	3140910	-21	kworker/u8:4+events_unbound	19:40:19	1
3135741	99	31	27,3	cyclictest	3266082	-21	kworker/u8:4+events_unbound	21:40:25	1
3135737	99	31	26,3	cyclictest	3291915	-21	kworker/u8:1+flush-259:0	22:15:01	0
3135737	99	31	25,4	cyclictest	3364233	-21	latency_hist	22:50:01	0
3135737	99	31	24,5	cyclictest	3187817	-21	latency_hist	20:00:01	0
3135747	99	30	23,5	cyclictest	3186905	-21	ntpq	19:55:20	3
3135741	99	30	27,2	cyclictest	551483	-21	kworker/u8:1+events_unbound	21:20:20	1
3135741	99	30	27,2	cyclictest	3447480	-21	kworker/u8:2+events_unbound	00:30:15	1
3135741	99	30	27,2	cyclictest	3447480	-21	kworker/u8:2+events_unbound	00:25:15	1
3135737	99	30	24,4	cyclictest	3146301	-21	kworker/u8:0+flush-259:0	19:20:16	0
3135747	99	29	25,3	cyclictest	3390135	-21	kworker/u8:0+flush-259:0	00:02:24	3
3135741	99	29	26,2	cyclictest	3266082	-21	kworker/u8:4+events_unbound	21:16:23	1
3135741	99	29	26,2	cyclictest	3140910	-21	kworker/u8:4+events_unbound	19:50:25	1
3135741	99	29	25,3	cyclictest	551483	-21	kworker/u8:1+events_unbound	19:23:34	1
3135741	99	29	23,4	cyclictest	3286576	-21	latency_hist	21:35:01	1
3135743	99	28	22,4	cyclictest	335557	-21	systemd-journal	21:46:14	2
3135741	99	28	25,2	cyclictest	3338108	-21	kworker/u8:3+events_unbound	23:25:17	1
3135741	99	28	25,2	cyclictest	3208675	-21	kworker/u8:3+events_unbound	20:25:24	1
3135747	99	27	22,4	cyclictest	3266082	-21	kworker/u8:4+flush-259:0	21:45:00	3
3135743	99	27	23,3	cyclictest	3473252	-21	apt-get	00:35:01	2
3135741	99	27	24,2	cyclictest	3390135	-21	kworker/u8:0+events_unbound	00:08:30	1
3135741	99	27	24,2	cyclictest	3291915	-21	kworker/u8:1+events_unbound	21:56:14	1
3135743	99	26	23,2	cyclictest	3260260	-21	kworker/u8:0+flush-259:0	21:10:01	2
3135743	99	26	22,3	cyclictest	3213669	-21	apt-get	20:25:01	2
3135743	99	26	21,3	cyclictest	509	-21	rs:main		2
3135741	99	26	23,2	cyclictest	3395313	-21	kworker/u8:4+events_unbound	23:35:27	1
3135741	99	26	23,2	cyclictest	3390135	-21	kworker/u8:0+events_unbound	00:03:33	1
3135741	99	26	23,2	cyclictest	3146301	-21	kworker/u8:0+events_unbound	19:36:14	1
3135741	99	26	23,2	cyclictest	3140910	-21	kworker/u8:4+events_unbound	19:26:22	1
3135737	99	26	21,4	cyclictest	335557	-21	systemd-journal	20:05:01	0
3135737	99	26	20,4	cyclictest	3214352	-21	apt-get	20:25:09	0
3135747	99	25	22,2	cyclictest	551483	-21	kworker/u8:1+flush-259:0	21:00:16	3
3135747	99	25	20,4	cyclictest	3337167	-21	ntpq	22:20:19	3
3135743	99	25	20,3	cyclictest	335557	-21	systemd-journal	21:16:31	2
3135741	99	25	22,2	cyclictest	3473073	-21	kworker/u8:3+events_unbound	00:38:31	1
3135741	99	25	22,2	cyclictest	3229851	-21	kworker/u8:4+events_unbound	20:51:31	1
3135741	99	25	21,3	cyclictest	3245405	-21	apt-get	20:55:10	1
3135737	99	25	20,3	cyclictest	3255759	-21	apt-get	21:05:10	0
3135747	99	24	22,2	cyclictest	3353927	-21	kworker/u8:0+flush-259:0	22:50:00	3
3135747	99	24	17,5	cyclictest	3219270	-21	latency_hist	20:30:00	3
3135743	99	24	20,3	cyclictest	3306835	-21	kworker/u8:2+flush-259:0	22:10:20	2
3135741	99	24	21,2	cyclictest	3379785	-21	kworker/u8:1+events_unbound	23:06:34	1
3135743	99	23	20,2	cyclictest	3395313	-21	kworker/u8:4+flush-259:0	23:44:59	2
3135741	99	23	20,2	cyclictest	3260657	-21	sh	21:09:59	1
3135737	99	23	20,2	cyclictest	3140910	-21	kworker/u8:4+flush-259:0	20:10:00	0
3135737	99	23	17,4	cyclictest	335557	-21	systemd-journal	19:45:00	0
3135737	99	23	16,5	cyclictest	3405164	-21	ntpq	23:25:19	0
3135747	99	22	16,4	cyclictest	3380000	-21	/usr/sbin/munin	23:05:13	3
3135743	99	22	19,2	cyclictest	3338108	-21	kworker/u8:3+events_unbound	23:30:00	2
3135743	99	22	17,3	cyclictest	3307407	-21	apt-get	21:55:11	2
3135741	99	22	19,2	cyclictest	3353927	-21	kworker/u8:0+events_unbound	22:40:17	1
3135741	99	22	18,3	cyclictest	3390135	-21	kworker/u8:0+flush-259:0	23:55:00	1
3135737	99	22	18,3	cyclictest	3266082	-21	kworker/u8:4+flush-259:0	21:35:16	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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