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 May 11, 2026 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2566257	99	50	42,5	cyclictest	2789774	-21	latency_hist	10:45:01	1
2566255	99	48	42,4	cyclictest	2774009	-21	cp	10:30:01	0
2566255	99	45	39,4	cyclictest	2862233	-21	latency_hist	11:55:01	0
2566260	99	44	41,2	cyclictest	2623033	-21	fwupd	08:03:21	2
2566260	99	44	41,2	cyclictest	2623033	-21	fwupd	08:03:20	2
2566257	99	41	33,5	cyclictest	2872660	-21	cp	12:05:00	1
2566255	99	41	38,2	cyclictest	2867012	-21	kworker/u8:4+flush-259:0	12:00:26	0
2566260	99	39	35,3	cyclictest	2587129	-21	kworker/u8:2+flush-259:0	07:35:01	2
2566260	99	39	34,4	cyclictest	2810489	-21	gpgv	11:05:01	2
2566257	99	38	32,4	cyclictest	2696041	-21	diskstats	09:15:14	1
2566255	99	38	35,2	cyclictest	1852587	-21	kworker/u8:4+events_unbound	07:14:42	0
2566264	99	36	28,6	cyclictest	2831354	-21	latency_hist	11:25:01	3
2566255	99	36	32,3	cyclictest	2867385	-21	latency_hist	12:00:00	0
2566255	99	35	32,3	cyclictest	2706582	-21	kworker/u8:0+events_unbound	09:42:37	0
2566255	99	35	32,2	cyclictest	2805418	-21	kworker/u8:0+events_unbound	11:05:19	0
2566255	99	35	29,4	cyclictest	252	-21	systemd-journal	07:34:36	0
2566257	99	34	29,3	cyclictest	2805418	-21	kworker/u8:0+flush-259:0	11:00:18	1
2566255	99	34	31,2	cyclictest	2571350	-21	kworker/u8:1+events_unbound	07:20:23	0
2566264	99	33	29,3	cyclictest	2706582	-21	kworker/u8:0+flush-259:0	09:35:18	3
2566264	99	33	26,5	cyclictest	2909029	-21	latency_hist	12:40:00	3
2566260	99	33	25,2	cyclictest	2789785	-21	kworker/u8:2+flush-259:0	10:55:15	2
2566255	99	33	30,3	cyclictest	2837176	-21	kworker/u8:3+events_unbound	12:21:37	0
2566255	99	33	30,2	cyclictest	2706582	-21	kworker/u8:0+events_unbound	09:55:15	0
2566260	99	32	28,3	cyclictest	2623042	-21	kworker/u8:2+flush-259:0	08:25:11	2
2566260	99	32	28,3	cyclictest	2587129	-21	kworker/u8:2+events_unbound	07:37:37	2
2566260	99	32	28,3	cyclictest	2550968	-21	kworker/u8:0+events_unbound	07:53:37	2
2566257	99	32	27,3	cyclictest	252	-21	systemd-journal	09:00:19	1
2566255	99	32	29,2	cyclictest	2837176	-21	kworker/u8:3+flush-259:0	12:10:37	0
2566255	99	32	29,2	cyclictest	2805418	-21	kworker/u8:0+events_unbound	11:15:24	0
2566255	99	32	29,2	cyclictest	2732845	-21	kworker/u8:3+events_unbound	10:40:21	0
2566255	99	32	29,2	cyclictest	2628401	-21	kworker/u8:1+events_unbound	09:15:16	0
2566255	99	32	29,2	cyclictest	2550968	-21	kworker/u8:0+flush-259:0	08:03:37	0
2566255	99	32	29,2	cyclictest	2550968	-21	kworker/u8:0+flush-259:0	08:03:37	0
2566255	99	32	29,2	cyclictest	2550968	-21	kworker/u8:0+events_unbound	07:39:54	0
2566260	99	31	27,3	cyclictest	2846839	-21	kworker/u8:0+events_unbound	11:41:38	2
2566260	99	31	25,4	cyclictest	509	-21	rs:main		2
2566257	99	31	25,4	cyclictest	252	-21	systemd-journal	09:49:36	1
2566255	99	31	28,2	cyclictest	2893791	-21	kworker/u8:2+events_unbound	12:25:23	0
2566255	99	31	28,2	cyclictest	2706582	-21	kworker/u8:0+events_unbound	09:35:14	0
2566255	99	31	27,3	cyclictest	2550968	-21	kworker/u8:0+events_unbound	07:40:22	0
2566255	99	31	26,3	cyclictest	2903842	-21	latency_hist	12:35:00	0
2566264	99	30	25,3	cyclictest	2805418	-21	kworker/u8:0+events_unbound	11:15:23	3
2566260	99	30	27,2	cyclictest	2716889	-21	kworker/u8:2+events_unbound	10:26:35	2
2566260	99	30	26,3	cyclictest	2846839	-21	kworker/u8:0+events_unbound	11:54:37	2
2566260	99	30	25,3	cyclictest	2789785	-21	kworker/u8:2+flush-259:0	11:30:16	2
2566257	99	30	24,4	cyclictest	509	-21	rs:main		1
2566255	99	30	27,2	cyclictest	2669955	-21	kworker/u8:4+events_unbound	09:05:21	0
2566255	99	30	27,2	cyclictest	2669955	-21	kworker/u8:4+events_unbound	08:55:00	0
2566255	99	30	27,2	cyclictest	2654399	-21	kworker/u8:3+events_unbound	08:35:15	0
2566255	99	30	27,2	cyclictest	2628401	-21	kworker/u8:1+events_unbound	09:20:22	0
2566255	99	30	27,2	cyclictest	2571350	-21	kworker/u8:1+flush-259:0	07:15:25	0
2566255	99	30	26,3	cyclictest	2805418	-21	kworker/u8:0+events_unbound	11:02:37	0
2566255	99	30	25,2	cyclictest	2716889	-21	kworker/u8:2+events_unbound	10:10:00	0
2566255	99	30	24,5	cyclictest	2820194	-21	ntpq	11:10:22	0
2566260	99	29	25,3	cyclictest	2517905	-21	kworker/u8:3+events_unbound	07:14:48	2
2566255	99	29	27,2	cyclictest	2837176	-21	kworker/u8:3+flush-259:0	12:05:25	0
2566255	99	29	27,2	cyclictest	2789785	-21	kworker/u8:2+events_unbound	10:55:20	0
2566255	99	29	26,2	cyclictest	2789785	-21	kworker/u8:2+events_unbound	11:30:18	0
2566264	99	28	24,3	cyclictest	2732845	-21	kworker/u8:3+flush-259:0	10:30:22	3
2566260	99	28	24,3	cyclictest	2789785	-21	kworker/u8:2+flush-259:0	11:35:25	2
2566260	99	28	24,3	cyclictest	2550968	-21	kworker/u8:0+events_unbound	07:46:38	2
2566260	99	28	24,3	cyclictest	2517905	-21	kworker/u8:3+events_unbound	07:29:35	2
2566260	99	28	23,3	cyclictest	2732845	-21	kworker/u8:3+flush-259:0	10:35:24	2
2566257	99	28	24,3	cyclictest	2669988	-21	apt-get	08:50:10	1
2566257	99	28	22,4	cyclictest	2669721	-21	latency_hist	08:50:01	1
2566255	99	28	26,2	cyclictest	2878159	-21	kworker/u8:1+events_unbound	12:19:38	0
2566255	99	28	25,2	cyclictest	2669955	-21	kworker/u8:4+flush-259:0	09:25:03	0
2566255	99	28	25,2	cyclictest	2550968	-21	kworker/u8:0+flush-259:0	07:50:15	0
2566255	99	28	24,3	cyclictest	2716889	-21	kworker/u8:2+flush-259:0	10:15:19	0
2566260	99	27	23,3	cyclictest	2837176	-21	kworker/u8:3+events_unbound	12:03:36	2
2566260	99	27	23,3	cyclictest	2789785	-21	kworker/u8:2+events_unbound	11:20:15	2
2566260	99	27	23,3	cyclictest	2732845	-21	kworker/u8:3+flush-259:0	10:50:39	2
2566260	99	27	23,3	cyclictest	2732845	-21	kworker/u8:3+events_unbound	10:21:38	2
2566260	99	27	23,3	cyclictest	2732845	-21	kworker/u8:3+events_unbound	10:21:38	2
2566260	99	27	23,3	cyclictest	2607674	-21	kworker/u8:3+events_unbound	08:06:37	2
2566260	99	27	20,5	cyclictest	2685258	-21	latency_hist	09:05:01	2
2566255	99	27	20,5	cyclictest	2795146	-21	/usr/sbin/munin	10:50:14	0
2566260	99	26	22,3	cyclictest	2867012	-21	kworker/u8:4+events_unbound	12:11:38	2
2566260	99	26	22,3	cyclictest	2623042	-21	kworker/u8:2+flush-259:0	08:10:37	2
2566257	99	26	20,4	cyclictest	2893791	-21	kworker/u8:2+flush-259:0	12:35:19	1
2566255	99	26	23,3	cyclictest	2706582	-21	kworker/u8:0+events_unbound	09:51:38	0
2566255	99	26	23,2	cyclictest	2846839	-21	kworker/u8:0+events_unbound	11:45:57	0
2566260	99	25	22,2	cyclictest	2878159	-21	kworker/u8:1+flush-259:0	12:15:25	2
2566260	99	25	22,2	cyclictest	2654399	-21	kworker/u8:3+flush-259:0	08:35:19	2
2566260	99	25	22,2	cyclictest	2550968	-21	kworker/u8:0+events_unbound	07:55:22	2
2566260	99	25	21,3	cyclictest	2706582	-21	kworker/u8:0+events_unbound	10:02:37	2
2566260	99	25	21,3	cyclictest	2628401	-21	kworker/u8:1+flush-259:0	09:30:23	2
2566260	99	25	20,4	cyclictest	2898705	-21	latency_hist	12:30:00	2
2566260	99	25	19,4	cyclictest	252	-21	systemd-journal	09:39:59	2
2566257	99	25	20,4	cyclictest	2637696	-21	kworker/u8:0+flush-259:0	08:40:01	1
2566255	99	25	22,2	cyclictest	2716889	-21	kworker/u8:2+flush-259:0	10:20:25	0
2566255	99	25	22,2	cyclictest	2716889	-21	kworker/u8:2+flush-259:0	10:20:24	0
2566260	99	24	21,2	cyclictest	2628401	-21	kworker/u8:1+events_unbound	08:40:15	2
2566260	99	24	20,3	cyclictest	2805418	-21	kworker/u8:0+events_unbound	11:25:56	2
2566260	99	24	19,4	cyclictest	2774594	-21	apt-get	10:30:13	2
2566260	99	24	19,4	cyclictest	2732845	-21	kworker/u8:3+events_unbound	09:50:32	2
2566257	99	24	18,4	cyclictest	2690865	-21	diskstats	09:10:15	1
2566257	99	24	18,4	cyclictest	2576679	-21	cp	07:20:01	1
2566255	99	24	21,2	cyclictest	2628401	-21	kworker/u8:1+flush-259:0	08:40:20	0
2566255	99	24	21,2	cyclictest	2628401	-21	kworker/u8:1+flush-259:0	08:20:16	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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