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 Fri Aug 21, 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
1812968	99	58	53,3	cyclictest	75	-21	kswapd0	20:55:02	0
1812968	99	52	48,3	cyclictest	2059155	-21	gpgv	23:04:59	0
1812977	99	51	46,3	cyclictest	1906065	-21	latency_hist	20:40:00	3
1812970	99	49	44,3	cyclictest	2143713	-21	apt-get	00:25:12	1
1812975	99	48	43,3	cyclictest	1864611	-21	latency_hist	20:00:01	2
1812975	99	48	42,4	cyclictest	2059225	-21	cp	23:05:01	2
1812977	99	45	39,4	cyclictest	2132687	-21	latency_hist	00:15:01	3
1812970	99	43	37,4	cyclictest	1911462	-21	apt-get	20:45:12	1
1812968	99	43	38,3	cyclictest	2000168	-21	kworker/u8:3+flush-259:0	22:10:00	0
1812968	99	43	37,4	cyclictest	2048911	-21	cp	22:55:02	0
1812977	99	42	37,4	cyclictest	1942935	-21	apt-get	21:15:12	3
1812968	99	42	36,4	cyclictest	2005607	-21	latency_hist	22:15:01	0
1812968	99	40	37,2	cyclictest	1922544	-21	kworker/u8:4+flush-259:0	21:30:26	0
1812968	99	40	36,2	cyclictest	2000168	-21	kworker/u8:3+events_unbound	22:15:20	0
1812977	99	38	32,4	cyclictest	1880142	-21	latency_hist	20:15:01	3
1812975	99	38	32,4	cyclictest	335557	-21	systemd-journal	23:55:01	2
1812968	99	38	33,4	cyclictest	2153846	-21	apt-get	00:35:01	0
1812977	99	37	30,5	cyclictest	1849063	-21	latency_hist	19:45:00	3
1812970	99	37	30,5	cyclictest	2111764	-21	cp	23:55:01	1
1812968	99	35	32,2	cyclictest	2085277	-21	kworker/u8:4+events_unbound	23:45:23	0
1812968	99	35	31,3	cyclictest	1874967	-21	latency_hist	20:10:01	0
1812968	99	35	28,4	cyclictest	1984275	-21	cp	21:55:00	0
1812970	99	34	28,4	cyclictest	2122341	-21	latency_hist	00:05:00	1
1812970	99	33	27,4	cyclictest	2138271	-21	latency_hist	00:20:00	1
1812970	99	33	27,4	cyclictest	1849324	-21	apt-get	19:45:11	1
1812968	99	33	29,2	cyclictest	2132889	-21	gpgv	00:15:00	0
1812968	99	33	28,3	cyclictest	2064631	-21	kworker/u8:3+events_unbound	23:25:14	0
1812968	99	33	27,4	cyclictest	2038042	-21	gpgv	22:45:01	0
1812975	99	32	27,4	cyclictest	2048304	-21	gpgv	22:55:00	2
1812975	99	32	27,4	cyclictest	1994949	-21	gpgv	22:05:00	2
1812975	99	31	24,5	cyclictest	2016725	-21	cp	22:25:01	2
1812970	99	31	25,4	cyclictest	2138532	-21	apt-get	00:20:13	1
1812968	99	31	28,2	cyclictest	2005646	-21	kworker/u8:1+flush-259:0	22:40:00	0
1812968	99	31	28,2	cyclictest	1869806	-21	kworker/u8:1+events_unbound	20:37:18	0
1812968	99	31	28,2	cyclictest	1823456	-21	kworker/u8:2+events_unbound	19:50:12	0
1812968	99	31	28,2	cyclictest	1764850	-21	kworker/u8:1+events_unbound	19:10:23	0
1812968	99	31	27,3	cyclictest	2064631	-21	kworker/u8:3+events_unbound	23:17:56	0
1812968	99	31	27,3	cyclictest	2005646	-21	kworker/u8:1+events_unbound	00:08:57	0
1812968	99	31	26,3	cyclictest	2143352	-21	kworker/u8:2+events_unbound	00:35:19	0
1812977	99	30	26,3	cyclictest	2122601	-21	apt-get	00:05:13	3
1812975	99	30	22,6	cyclictest	2037652	-21	cat	22:45:01	2
1812968	99	30	27,2	cyclictest	1921584	-21	kworker/u8:0+events_unbound	21:35:25	0
1812968	99	30	27,2	cyclictest	1890570	-21	kworker/u8:3+events_unbound	20:27:11	0
1812968	99	30	26,2	cyclictest	1900936	-21	kworker/u8:0+flush-259:0	20:45:25	0
1812968	99	30	25,4	cyclictest	1910872	-21	kworker/u8:2+events_unbound	21:18:56	0
1812975	99	29	24,4	cyclictest	1906330	-21	apt-get	20:40:12	2
1812968	99	29	26,3	cyclictest	2064631	-21	kworker/u8:3+events_unbound	23:55:14	0
1812968	99	29	26,2	cyclictest	2021683	-21	kworker/u8:2+events_unbound	23:07:45	0
1812968	99	29	26,2	cyclictest	1955993	-21	kworker/u8:2+flush-259:0	21:25:26	0
1812968	99	29	26,2	cyclictest	1955993	-21	kworker/u8:2+flush-259:0	21:25:26	0
1812968	99	29	26,2	cyclictest	1955993	-21	kworker/u8:2+events_unbound	21:42:19	0
1812968	99	29	26,2	cyclictest	1828633	-21	kworker/u8:3+flush-259:0	20:00:16	0
1812968	99	29	26,2	cyclictest	1823456	-21	kworker/u8:2+flush-259:0	19:50:00	0
1812970	99	28	22,4	cyclictest	1979176	-21	apt-get	21:50:12	1
1812968	99	28	22,4	cyclictest	1879227	-21	ntpq	20:10:20	0
1812977	99	27	22,3	cyclictest	2095808	-21	base64	23:40:00	3
1812975	99	27	20,5	cyclictest	2000430	-21	latency_hist	22:10:02	2
1812968	99	27	24,2	cyclictest	2021683	-21	kworker/u8:2+flush-259:0	22:50:22	0
1812968	99	27	23,3	cyclictest	1916240	-21	kworker/u8:1+events_unbound	20:53:56	0
1812968	99	27	23,3	cyclictest	1823456	-21	kworker/u8:2+flush-259:0	19:55:16	0
1812968	99	27	23,3	cyclictest	1823456	-21	kworker/u8:2+events_unbound	19:37:05	0
1812968	99	27	21,5	cyclictest	1911203	-21	latency_hist	20:45:00	0
1812970	99	26	21,4	cyclictest	1818089	-21	kworker/u8:0+events_unbound	19:40:00	1
1812970	99	26	19,5	cyclictest	335557	-21	systemd-journal	00:05:56	1
1812968	99	26	23,2	cyclictest	1764850	-21	kworker/u8:1+flush-259:0	19:20:20	0
1812968	99	26	22,3	cyclictest	2085277	-21	kworker/u8:4+flush-259:0	23:30:15	0
1812968	99	26	22,3	cyclictest	2005646	-21	kworker/u8:1+flush-259:0	23:35:16	0
1812970	99	25	19,4	cyclictest	2016929	-21	gpgv	22:25:01	1
1812968	99	25	22,2	cyclictest	2021683	-21	kworker/u8:2+events_unbound	22:40:19	0
1812968	99	25	21,3	cyclictest	2117367	-21	kworker/u8:2+events_unbound	00:00:14	0
1812975	99	24	19,4	cyclictest	2021683	-21	kworker/u8:2+flush-259:0	23:09:59	2
1812975	99	24	18,4	cyclictest	2106436	-21	latency_hist	23:50:00	2
1812970	99	24	18,4	cyclictest	1921814	-21	store	20:55:00	1
1812968	99	24	21,2	cyclictest	2085277	-21	kworker/u8:4+events_unbound	23:40:23	0
1812968	99	24	21,2	cyclictest	2064631	-21	kworker/u8:3+flush-259:0	23:20:21	0
1812968	99	24	21,2	cyclictest	1973918	-21	kworker/u8:4+events_unbound	21:55:01	0
1812968	99	24	21,2	cyclictest	1921584	-21	kworker/u8:0+flush-259:0	21:50:01	0
1812968	99	24	20,3	cyclictest	2064855	-21	apt-get	23:10:12	0
1812977	99	23	7,3	cyclictest	2021067	-21	ntpq	22:25:22	3
1812968	99	23	19,3	cyclictest	2005646	-21	kworker/u8:1+events_unbound	00:19:56	0
1812977	99	22	17,3	cyclictest	335557	-21	systemd-journal	20:15:55	3
1812970	99	22	18,3	cyclictest	1921584	-21	kworker/u8:0+flush-259:0	21:25:19	1
1812970	99	22	18,3	cyclictest	1921584	-21	kworker/u8:0+flush-259:0	21:25:18	1
1812970	99	22	16,4	cyclictest	335557	-21	systemd-journal	22:12:55	1
1812970	99	22	16,4	cyclictest	2132682	-21	apt-get	00:15:00	1
1812968	99	22	19,2	cyclictest	2005646	-21	kworker/u8:1+flush-259:0	22:30:01	0
1812968	99	22	19,2	cyclictest	1869806	-21	kworker/u8:1+flush-259:0	20:30:21	0
1812968	99	22	19,2	cyclictest	1802857	-21	kworker/u8:4+flush-259:0	19:15:57	0
1812977	99	21	17,3	cyclictest	1921584	-21	kworker/u8:0+flush-259:0	22:15:00	3
1812975	99	21	17,3	cyclictest	2005646	-21	kworker/u8:1+flush-259:0	22:50:01	2
1812975	99	21	16,4	cyclictest	1828633	-21	kworker/u8:3+events_unbound	20:00:22	2
1812975	99	21	14,5	cyclictest	2126631	-21	ntpq	00:05:23	2
1812970	99	21	17,3	cyclictest	1828633	-21	kworker/u8:3+flush-259:0	20:15:00	1
1812968	99	21	18,2	cyclictest	1947875	-21	kworker/u8:1+events_unbound	21:20:12	0
1812968	99	21	17,3	cyclictest	1963008	-21	kworker/u8:1+events_unbound	22:02:23	0
1812977	99	20	17,2	cyclictest	0	-21	swapper/3	22:25:01	3
1812977	99	20	14,4	cyclictest	2064598	-21	latency_hist	23:10:00	3
1812977	99	20	14,4	cyclictest	2006132	-21	cat	22:15:01	3
1812975	99	20	12,6	cyclictest	1844330	-21	diskstats	19:40:12	2
1812975	99	20	1,18	cyclictest	1	-21	systemd	00:40:01	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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