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 Sat Aug 29, 2026 00:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2255024	99	55	51,3	cyclictest	2582448	-21	apt-get	00:25:12	0
2255024	99	51	48,2	cyclictest	2395089	-21	kworker/u8:2+events_unbound	22:00:23	0
2255024	99	50	43,5	cyclictest	2400433	-21	cp	21:30:00	0
2255026	99	47	44,2	cyclictest	2265349	-21	kworker/u8:3+events_unbound	19:35:24	1
2255024	99	44	41,3	cyclictest	2384410	-21	kworker/u8:0+events_unbound	21:20:22	0
2255024	99	43	38,4	cyclictest	2358473	-21	latency_hist	20:50:00	0
2255026	99	42	39,2	cyclictest	2431859	-21	kworker/u8:1+flush-259:0	22:25:25	1
2255026	99	42	38,3	cyclictest	2275659	-21	kworker/u8:0+flush-259:0	20:05:23	1
2255026	99	42	37,4	cyclictest	2353535	-21	apt-get	20:45:10	1
2255024	99	42	36,4	cyclictest	2483435	-21	apt-get	22:50:13	0
2255037	99	40	36,3	cyclictest	2587656	-21	apt-get	00:30:11	3
2255033	99	40	35,3	cyclictest	2281050	-21	apt-get	19:35:11	2
2255026	99	40	35,3	cyclictest	2421583	-21	apt-get	21:50:11	1
2255026	99	38	35,2	cyclictest	2431859	-21	kworker/u8:1+flush-259:0	22:45:26	1
2255026	99	37	34,2	cyclictest	2556575	-21	apt-get	00:00:12	1
2255026	99	37	33,3	cyclictest	2499320	-21	apt-get	23:05:12	1
2255026	99	37	33,3	cyclictest	2327547	-21	kworker/u8:4+events_unbound	20:35:10	1
2255026	99	36	33,2	cyclictest	2431859	-21	kworker/u8:1+flush-259:0	22:20:16	1
2255026	99	36	31,3	cyclictest	2400266	-21	https	21:30:00	1
2255033	99	35	28,5	cyclictest	335557	-21	systemd-journal	20:15:00	2
2255026	99	35	32,2	cyclictest	2514562	-21	kworker/u8:1+flush-259:0	00:10:26	1
2255026	99	34	31,2	cyclictest	2395089	-21	kworker/u8:2+events_unbound	21:25:25	1
2255024	99	33	30,2	cyclictest	2431859	-21	kworker/u8:1+flush-259:0	22:25:17	0
2255024	99	33	28,4	cyclictest	2359158	-21	apt-get	20:50:11	0
2255037	99	32	29,2	cyclictest	2327547	-21	kworker/u8:4+flush-259:0	20:40:35	3
2255026	99	32	28,3	cyclictest	2514562	-21	kworker/u8:1+flush-259:0	00:05:24	1
2255026	99	32	28,3	cyclictest	2478034	-21	kworker/u8:2+flush-259:0	23:30:15	1
2255026	99	32	28,3	cyclictest	2406090	-21	apt-get	21:35:12	1
2255033	99	30	25,4	cyclictest	2498659	-21	gpgv	23:05:00	2
2255026	99	30	27,2	cyclictest	2493501	-21	kworker/u8:3+flush-259:0	00:15:16	1
2255026	99	30	26,3	cyclictest	2332774	-21	kworker/u8:5+events_unbound	20:29:20	1
2255037	99	29	23,4	cyclictest	2383800	-21	ntpq	21:10:21	3
2255037	99	28	25,2	cyclictest	2327340	-21	kworker/u8:2+flush-259:0	20:45:21	3
2255037	99	28	24,3	cyclictest	2384410	-21	kworker/u8:0+flush-259:0	21:20:01	3
2255026	99	28	26,1	cyclictest	2234780	-21	kworker/u8:2+events_unbound	19:15:25	1
2255026	99	28	23,4	cyclictest	2390131	-21	apt-get	21:20:10	1
2255026	99	28	23,4	cyclictest	2369485	-21	apt-get	21:00:11	1
2255026	99	28	23,4	cyclictest	2322445	-21	apt-get	20:15:12	1
2255024	99	28	25,2	cyclictest	2275659	-21	kworker/u8:0+flush-259:0	19:40:24	0
2255037	99	27	21,4	cyclictest	2301763	-21	apt-get	19:55:12	3
2255026	99	27	23,3	cyclictest	2541061	-21	apt-get	23:45:10	1
2255024	99	27	23,3	cyclictest	2265349	-21	kworker/u8:3+flush-259:0	19:25:25	0
2255024	99	27	21,4	cyclictest	2520339	-21	/usr/sbin/munin	23:25:23	0
2255033	99	26	21,3	cyclictest	2190844	-21	kworker/u8:1+flush-259:0	19:10:37	2
2255033	99	26	20,4	cyclictest	2275659	-21	kworker/u8:0+flush-259:0	19:35:00	2
2255026	99	25	21,3	cyclictest	2582413	-21	kworker/u8:4+flush-259:0	00:30:24	1
2255026	99	25	21,3	cyclictest	2478034	-21	kworker/u8:2+events_unbound	23:20:15	1
2255026	99	25	19,4	cyclictest	2269629	-21	ntpq	19:20:21	1
2255024	99	25	22,2	cyclictest	2265349	-21	kworker/u8:3+events_unbound	20:20:27	0
2255026	99	24	21,2	cyclictest	2275659	-21	kworker/u8:0+flush-259:0	19:55:14	1
2255024	99	24	18,5	cyclictest	2468132	-21	diskstats	22:35:13	0
2255033	99	23	17,4	cyclictest	2426496	-21	latency_hist	21:55:01	2
2255026	99	23	20,2	cyclictest	2327547	-21	kworker/u8:4+flush-259:0	21:55:24	1
2255026	99	23	19,3	cyclictest	2327547	-21	kworker/u8:4+flush-259:0	22:10:23	1
2255024	99	23	20,2	cyclictest	2514562	-21	kworker/u8:1+events_unbound	23:50:24	0
2255024	99	23	19,3	cyclictest	2327547	-21	kworker/u8:4+flush-259:0	22:05:19	0
2255037	99	22	18,2	cyclictest	2400237	-21	apt-get	21:30:00	3
2255037	99	21	16,3	cyclictest	2478034	-21	kworker/u8:2+events_unbound	22:55:17	3
2255033	99	21	13,6	cyclictest	2509549	-21	cp	23:15:01	2
2255026	99	21	18,2	cyclictest	2514562	-21	kworker/u8:1+events_unbound	23:35:12	1
2255026	99	21	18,2	cyclictest	2332774	-21	kworker/u8:5+events_unbound	20:30:19	1
2255024	99	21	18,3	cyclictest	2478034	-21	kworker/u8:2+flush-259:0	23:00:24	0
2255033	99	20	17,2	cyclictest	2478034	-21	kworker/u8:2+events_unbound	22:50:24	2
2255026	99	20	17,2	cyclictest	2265349	-21	kworker/u8:3+events_unbound	19:25:24	1
2255026	99	20	15,4	cyclictest	2431866	-21	/usr/sbin/munin	22:00:13	1
2255024	99	20	17,2	cyclictest	2353295	-21	kworker/u8:1+events_unbound	21:10:24	0
2255024	99	20	17,2	cyclictest	2327547	-21	kworker/u8:4+flush-259:0	21:15:23	0
2255024	99	20	17,2	cyclictest	2275659	-21	kworker/u8:0+flush-259:0	20:00:21	0
2255024	99	20	17,2	cyclictest	2275659	-21	kworker/u8:0+flush-259:0	20:00:20	0
2255024	99	20	16,2	cyclictest	2405847	-21	kworker/u8:0+events_unbound	21:50:17	0
2255037	99	19	16,2	cyclictest	2971	-21	cron	21:54:59	3
2255037	99	19	11,5	cyclictest	335557	-21	systemd-journal	00:25:00	3
2255033	99	19	15,3	cyclictest	2291370	-21	kworker/u8:2+flush-259:0	19:50:00	2
2255033	99	19	15,3	cyclictest	2275659	-21	kworker/u8:0+flush-259:0	20:20:01	2
2255033	99	19	15,2	cyclictest	0	-21	swapper/2	00:30:01	2
2255033	99	19	13,4	cyclictest	2390291	-21	diskstats	21:20:11	2
2255026	99	19	17,1	cyclictest	2327547	-21	kworker/u8:4+events_unbound	21:15:17	1
2255026	99	19	16,2	cyclictest	2514562	-21	kworker/u8:1+events_unbound	23:50:16	1
2255026	99	19	16,2	cyclictest	2467694	-21	cron	22:35:00	1
2255026	99	19	16,2	cyclictest	2327547	-21	kworker/u8:4+events_unbound	20:50:17	1
2255026	99	19	15,3	cyclictest	2190844	-21	kworker/u8:1+events_unbound	19:10:13	1
2255026	99	19	14,3	cyclictest	2510050	-21	apt-get	23:15:12	1
2255026	99	19	14,3	cyclictest	0	-21	swapper/1	22:39:59	1
2255026	99	19	13,5	cyclictest	2509466	-21	cp	23:15:01	1
2255024	99	19	16,2	cyclictest	2493501	-21	kworker/u8:3+events_unbound	00:20:12	0
2255024	99	19	16,2	cyclictest	2478034	-21	kworker/u8:2+events_unbound	23:40:15	0
2255024	99	19	14,4	cyclictest	2264414	-21	ntpq	19:15:21	0
2255037	99	18	14,3	cyclictest	2535672	-21	kworker/u8:0+flush-259:0	00:05:16	3
2255037	99	18	14,3	cyclictest	2520140	-21	kworker/u8:0+flush-259:0	23:25:26	3
2255037	99	18	14,3	cyclictest	2515208	-21	apt-get	23:20:12	3
2255037	99	18	14,3	cyclictest	2400762	-21	base64	21:30:01	3
2255037	99	18	13,4	cyclictest	335557	-21	systemd-journal	19:14:59	3
2255033	99	18	15,2	cyclictest	335557	-21	systemd-journal	21:20:01	2
2255033	99	18	15,2	cyclictest	2504222	-21	idleruntime-cro	23:09:59	2
2255033	99	18	15,2	cyclictest	2265289	-21	cron	19:20:00	2
2255033	99	18	12,4	cyclictest	2327547	-21	kworker/u8:4+flush-259:0	21:45:00	2
2255033	99	18	12,4	cyclictest	2286222	-21	/usr/sbin/munin	19:40:14	2
2255033	99	18	11,5	cyclictest	2571844	-21	latency_hist	00:15:00	2
2255024	99	18	15,2	cyclictest	2535672	-21	kworker/u8:0+events_unbound	00:00:22	0
2255024	99	18	15,2	cyclictest	2369895	-21	irqcore	21:00:15	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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