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 14, 2026 12:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3797297	99	51	47,3	cyclictest	3947916	-21	kworker/u8:1+flush-259:0	09:45:25	2
3797294	99	46	43,2	cyclictest	3984656	-21	kworker/u8:2+flush-259:0	10:15:27	1
3797297	99	42	37,3	cyclictest	4036358	-21	kworker/u8:3+flush-259:0	12:30:19	2
3797297	99	42	37,3	cyclictest	4036358	-21	kworker/u8:3+flush-259:0	12:30:19	2
3797297	99	39	35,3	cyclictest	3963735	-21	kworker/u8:3+events_unbound	09:55:01	2
3797297	99	38	34,3	cyclictest	3958395	-21	kworker/u8:0+events_unbound	10:15:28	2
3797290	99	38	32,4	cyclictest	509	-21	rs:main		0
3797290	99	38	31,5	cyclictest	4099441	-21	diskstats	12:00:14	0
3797297	99	37	33,3	cyclictest	4046995	-21	kworker/u8:2+flush-259:0	12:25:23	2
3797297	99	37	33,3	cyclictest	4005327	-21	kworker/u8:1+flush-259:0	10:45:00	2
3797297	99	36	32,3	cyclictest	3921212	-21	kworker/u8:2+flush-259:0	09:10:20	2
3797290	99	36	32,3	cyclictest	3797284	-21	kworker/u8:3+flush-259:0	07:25:16	0
3797297	99	35	32,2	cyclictest	3797284	-21	kworker/u8:3+events_unbound	07:20:21	2
3797294	99	35	30,4	cyclictest	252	-21	systemd-journal	09:50:00	1
3797294	99	35	29,4	cyclictest	4021368	-21	cat	10:45:01	1
3797290	99	34	29,4	cyclictest	3797284	-21	kworker/u8:3+flush-259:0	08:35:17	0
3797290	99	34	29,3	cyclictest	3797284	-21	kworker/u8:3+flush-259:0	07:20:15	0
3797297	99	33	28,3	cyclictest	3890277	-21	kworker/u8:1+flush-259:0	08:50:21	2
3797290	99	33	26,5	cyclictest	4020771	-21	latency_hist	10:45:01	0
3797297	99	32	29,2	cyclictest	3848783	-21	kworker/u8:2+events_unbound	08:43:45	2
3797297	99	32	28,3	cyclictest	4109347	-21	kworker/u8:1+events_unbound	12:18:45	2
3797297	99	31	28,2	cyclictest	628206	-21	kworker/u8:1+events_unbound	07:15:00	2
3797297	99	31	27,3	cyclictest	3974226	-21	apt-get	10:00:10	2
3797297	99	31	27,3	cyclictest	3963735	-21	kworker/u8:3+events_unbound	10:09:46	2
3797297	99	31	27,3	cyclictest	3963735	-21	kworker/u8:3+events_unbound	10:09:45	2
3797297	99	31	27,3	cyclictest	3890277	-21	kworker/u8:1+events_unbound	09:08:45	2
3797297	99	31	25,4	cyclictest	3833750	-21	diskstats	07:45:13	2
3797290	99	31	24,5	cyclictest	4071935	-21	ntpq	11:30:20	0
3797299	99	30	26,3	cyclictest	3848783	-21	kworker/u8:2+flush-259:0	08:45:14	3
3797299	99	30	26,3	cyclictest	3797284	-21	kworker/u8:3+flush-259:0	08:05:25	3
3797297	99	30	26,3	cyclictest	3895919	-21	kworker/u8:3+events_unbound	08:55:18	2
3797290	99	30	26,2	cyclictest	4109347	-21	kworker/u8:1+flush-259:0	12:25:00	0
3797290	99	30	24,4	cyclictest	3921656	-21	apt-get	09:10:02	0
3797297	99	29	27,2	cyclictest	4036358	-21	kworker/u8:3+flush-259:0	11:35:23	2
3797297	99	29	25,3	cyclictest	3818121	-21	kworker/u8:0+events_unbound	08:00:19	2
3797297	99	29	23,4	cyclictest	4099253	-21	/usr/sbin/munin	12:00:15	2
3797290	99	29	25,3	cyclictest	4046995	-21	kworker/u8:2+flush-259:0	11:55:17	0
3797290	99	29	22,5	cyclictest	3916545	-21	latency_hist	09:05:02	0
3797290	99	29	21,6	cyclictest	3858661	-21	ntpq	08:05:22	0
3797290	99	29	21,5	cyclictest	4135197	-21	latency_hist	12:35:01	0
3797290	99	29	21,5	cyclictest	4135197	-21	latency_hist	12:35:01	0
3797297	99	28	25,2	cyclictest	3890277	-21	kworker/u8:1+events_unbound	09:15:15	2
3797297	99	28	24,3	cyclictest	3818121	-21	kworker/u8:0+events_unbound	07:38:46	2
3797297	99	28	24,3	cyclictest	3818121	-21	kworker/u8:0+events_unbound	07:38:45	2
3797294	99	28	24,3	cyclictest	3995241	-21	apt-get	10:20:12	1
3797294	99	28	23,3	cyclictest	252	-21	systemd-journal	08:02:43	1
3797299	99	27	22,3	cyclictest	3812726	-21	latency_hist	07:25:00	3
3797297	99	27	24,2	cyclictest	3797284	-21	kworker/u8:3+events_unbound	07:53:44	2
3797299	99	26	22,3	cyclictest	4134835	-21	kworker/u8:1+flush-259:0	12:40:00	3
3797299	99	26	19,5	cyclictest	252	-21	systemd-journal	10:50:00	3
3797297	99	26	22,3	cyclictest	4134835	-21	kworker/u8:1+flush-259:0	12:35:25	2
3797297	99	26	22,3	cyclictest	4109347	-21	kworker/u8:1+events_unbound	12:24:44	2
3797297	99	26	22,3	cyclictest	3848783	-21	kworker/u8:2+flush-259:0	08:20:21	2
3797297	99	26	21,4	cyclictest	4036358	-21	kworker/u8:3+events_unbound	11:50:45	2
3797297	99	26	20,4	cyclictest	3843892	-21	apt-get	07:55:12	2
3797294	99	26	22,3	cyclictest	3932698	-21	apt-get	09:20:11	1
3797290	99	26	23,2	cyclictest	4036358	-21	kworker/u8:3+flush-259:0	11:45:00	0
3797297	99	25	22,2	cyclictest	3848783	-21	kworker/u8:2+flush-259:0	08:45:18	2
3797297	99	25	22,2	cyclictest	3797284	-21	kworker/u8:3+events_unbound	07:30:23	2
3797297	99	25	21,3	cyclictest	3958395	-21	kworker/u8:0+events_unbound	10:26:43	2
3797297	99	25	21,3	cyclictest	3921212	-21	kworker/u8:2+events_unbound	09:22:45	2
3797294	99	25	18,5	cyclictest	3901089	-21	latency_hist	08:50:00	1
3797290	99	25	20,3	cyclictest	4125132	-21	apt-get	12:25:10	0
3797290	99	25	16,6	cyclictest	252	-21	systemd-journal	09:29:59	0
3797299	99	24	19,4	cyclictest	4109326	-21	latency_hist	12:09:59	3
3797297	99	24	20,2	cyclictest	3895919	-21	kworker/u8:3+events_unbound	09:00:22	2
3797297	99	24	19,4	cyclictest	3797284	-21	kworker/u8:3+events_unbound	07:41:44	2
3797294	99	24	20,3	cyclictest	3797284	-21	kworker/u8:3+flush-259:0	08:10:15	1
3797290	99	24	20,3	cyclictest	3958395	-21	kworker/u8:0+flush-259:0	10:15:21	0
3797299	99	23	19,3	cyclictest	4005327	-21	kworker/u8:1+flush-259:0	11:40:01	3
3797299	99	23	17,4	cyclictest	4109561	-21	/usr/sbin/munin	12:10:14	3
3797297	99	23	20,3	cyclictest	3984656	-21	kworker/u8:2+events_unbound	10:20:25	2
3797297	99	23	19,3	cyclictest	4036358	-21	kworker/u8:3+flush-259:0	11:00:00	2
3797297	99	23	19,3	cyclictest	3921212	-21	kworker/u8:2+flush-259:0	09:25:14	2
3797290	99	23	16,5	cyclictest	4009567	-21	ntpq	10:30:22	0
3797297	99	22	19,2	cyclictest	3963735	-21	kworker/u8:3+flush-259:0	09:55:23	2
3797297	99	22	18,3	cyclictest	4005327	-21	kworker/u8:1+flush-259:0	11:45:18	2
3797297	99	22	18,3	cyclictest	3984656	-21	kworker/u8:2+events_unbound	10:32:44	2
3797297	99	22	16,4	cyclictest	4036358	-21	kworker/u8:3+events_unbound	11:05:15	2
3797294	99	22	16,5	cyclictest	3868916	-21	ntpq	08:15:19	1
3797290	99	22	17,4	cyclictest	4005327	-21	kworker/u8:1+flush-259:0	10:45:16	0
3797290	99	22	17,4	cyclictest	3958395	-21	kworker/u8:0+flush-259:0	10:35:16	0
3797290	99	22	16,4	cyclictest	4036860	-21	/usr/sbin/munin	11:00:19	0
3797290	99	22	16,4	cyclictest	3875185	-21	apt-get	08:25:12	0
3797299	99	21	17,3	cyclictest	3958395	-21	kworker/u8:0+flush-259:0	10:25:13	3
3797297	99	21	18,2	cyclictest	3921212	-21	kworker/u8:2+events_unbound	09:40:21	2
3797297	99	21	17,3	cyclictest	4036358	-21	kworker/u8:3+events_unbound	11:30:18	2
3797297	99	21	17,3	cyclictest	3958395	-21	kworker/u8:0+flush-259:0	10:35:21	2
3797297	99	21	16,3	cyclictest	4046995	-21	kworker/u8:2+flush-259:0	11:15:16	2
3797297	99	21	14,5	cyclictest	252	-21	systemd-journal	11:11:43	2
3797294	99	21	19,2	cyclictest	4036358	-21	kworker/u8:3+flush-259:0	11:35:01	1
3797294	99	21	16,4	cyclictest	509	-21	rs:main		1
3797299	99	20	8,11	cyclictest	3964381	-21	irqcore	09:50:15	3
3797299	99	20	8,11	cyclictest	0	-21	swapper/3	10:05:01	3
3797299	99	20	14,4	cyclictest	252	-21	systemd-journal	10:15:29	3
3797297	99	20	16,3	cyclictest	628206	-21	kworker/u8:1+events_unbound	07:15:20	2
3797297	99	20	16,3	cyclictest	4104431	-21	apt-get	12:05:11	2
3797297	99	20	14,2	cyclictest	4046995	-21	kworker/u8:2+events_unbound	12:10:13	2
3797294	99	20	16,3	cyclictest	4067641	-21	latency_hist	11:30:01	1
3797294	99	20	16,3	cyclictest	3812995	-21	apt-get	07:25:11	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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