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 Jul 02, 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
1904540	99	55	44,8	cyclictest	335557	-21	systemd-journal	22:20:01	2
1904538	99	47	42,4	cyclictest	2039313	-21	gpgv	21:20:00	1
1904538	99	46	34,10	cyclictest	1971943	-21	base64	20:15:00	1
1904538	99	40	35,3	cyclictest	1930455	-21	kworker/u8:2+flush-259:0	19:35:19	1
1904534	99	40	36,3	cyclictest	2128322	-21	kworker/u8:3+flush-259:0	23:25:00	0
1904538	99	39	33,4	cyclictest	509	-21	rs:main		1
1904534	99	38	35,2	cyclictest	75	-21	kswapd0	20:15:03	0
1904544	99	37	31,4	cyclictest	1982522	-21	latency_hist	20:25:01	3
1904544	99	37	30,5	cyclictest	2148742	-21	latency_hist	23:05:01	3
1904534	99	37	33,3	cyclictest	2096999	-21	apt-get	22:15:11	0
1904540	99	36	30,3	cyclictest	2164603	-21	kworker/u8:0+flush-259:0	23:25:16	2
1904534	99	36	30,4	cyclictest	2242398	-21	diskstats	00:35:13	0
1904544	99	35	28,5	cyclictest	2247134	-21	latency_hist	00:40:01	3
1904540	99	35	30,4	cyclictest	1987652	-21	kworker/u8:1+flush-259:0	21:05:21	2
1904540	99	35	30,4	cyclictest	1987652	-21	kworker/u8:1+flush-259:0	21:05:20	2
1904540	99	34	29,3	cyclictest	2133507	-21	kworker/u8:4+flush-259:0	23:15:00	2
1904534	99	33	20,11	cyclictest	2185589	-21	diskstats	23:40:12	0
1904534	99	33	18,14	cyclictest	2133516	-21	/usr/sbin/munin	22:50:21	0
1904544	99	32	26,4	cyclictest	2003439	-21	apt-get	20:45:11	3
1904540	99	32	28,3	cyclictest	2133507	-21	kworker/u8:4+events_unbound	22:50:11	2
1904534	99	32	27,4	cyclictest	2159024	-21	latency_hist	23:15:01	0
1904544	99	31	25,4	cyclictest	2050186	-21	/usr/sbin/munin	21:30:15	3
1904544	99	31	25,4	cyclictest	1904725	-21	kworker/u8:3+flush-259:0	19:15:26	3
1904540	99	31	24,5	cyclictest	2096735	-21	latency_hist	22:15:00	2
1904538	99	31	25,4	cyclictest	2055085	-21	latency_hist	21:35:00	1
1904534	99	31	13,17	cyclictest	2023783	-21	turbostat	21:05:00	0
1904544	99	30	25,3	cyclictest	2206097	-21	/usr/sbin/munin	00:00:14	3
1904538	99	30	25,4	cyclictest	2101903	-21	latency_hist	22:20:01	1
1904544	99	29	22,4	cyclictest	1956521	-21	/usr/sbin/munin	20:00:14	3
1904534	99	29	25,3	cyclictest	2045027	-21	apt-get	21:25:11	0
1904544	99	28	24,3	cyclictest	2133507	-21	kworker/u8:4+flush-259:0	23:10:24	3
1904538	99	28	23,4	cyclictest	1904498	-21	kworker/u8:0+flush-259:0	19:20:16	1
1904534	99	28	22,4	cyclictest	1935581	-21	latency_hist	19:40:01	0
1904540	99	27	23,3	cyclictest	2128322	-21	kworker/u8:3+flush-259:0	23:20:16	2
1904540	99	27	23,3	cyclictest	1961640	-21	kworker/u8:4+events_unbound	20:20:01	2
1904540	99	27	22,4	cyclictest	335557	-21	systemd-journal	20:47:12	2
1904540	99	27	22,4	cyclictest	2039196	-21	apt-get	21:19:59	2
1904540	99	27	22,4	cyclictest	1904725	-21	kworker/u8:3+events_unbound	19:15:23	2
1904544	99	26	19,5	cyclictest	2023770	-21	latency_hist	21:05:01	3
1904540	99	26	23,2	cyclictest	1930455	-21	kworker/u8:2+flush-259:0	19:55:15	2
1904540	99	26	22,3	cyclictest	2164603	-21	kworker/u8:0+events_unbound	00:05:25	2
1904540	99	26	22,3	cyclictest	2055100	-21	kworker/u8:1+flush-259:0	22:40:21	2
1904540	99	26	22,3	cyclictest	1846236	-21	kworker/u8:4+flush-259:0	19:45:24	2
1904538	99	26	22,3	cyclictest	2091805	-21	kworker/u8:2+flush-259:0	22:39:59	1
1904538	99	26	22,3	cyclictest	1961640	-21	kworker/u8:4+flush-259:0	20:24:59	1
1904544	99	25	20,4	cyclictest	1930455	-21	kworker/u8:2+flush-259:0	19:45:16	3
1904544	99	25	18,5	cyclictest	335557	-21	systemd-journal	23:45:00	3
1904540	99	25	21,3	cyclictest	1961640	-21	kworker/u8:4+flush-259:0	20:20:23	2
1904538	99	25	21,3	cyclictest	2070586	-21	kworker/u8:3+flush-259:0	22:20:22	1
1904538	99	25	21,3	cyclictest	1925493	-21	/usr/sbin/munin	19:30:13	1
1904538	99	25	20,4	cyclictest	335557	-21	systemd-journal	20:58:11	1
1904534	99	25	21,3	cyclictest	2195077	-21	kworker/u8:1+flush-259:0	23:50:00	0
1904544	99	24	19,3	cyclictest	2128322	-21	kworker/u8:3+flush-259:0	23:15:15	3
1904544	99	24	17,5	cyclictest	2091669	-21	cat	22:10:01	3
1904540	99	24	20,3	cyclictest	2023797	-21	kworker/u8:2+flush-259:0	21:40:25	2
1904540	99	24	20,3	cyclictest	1951287	-21	kworker/u8:3+events_unbound	20:05:20	2
1904540	99	24	19,3	cyclictest	2133507	-21	kworker/u8:4+events_unbound	00:22:23	2
1904538	99	24	19,4	cyclictest	335557	-21	systemd-journal	21:05:00	1
1904538	99	24	19,3	cyclictest	2185159	-21	latency_hist	23:40:01	1
1904544	99	23	19,3	cyclictest	75	-21	kswapd0	20:15:02	3
1904544	99	23	19,3	cyclictest	2091805	-21	kworker/u8:2+flush-259:0	23:00:00	3
1904544	99	23	18,4	cyclictest	2008351	-21	kworker/u8:0+flush-259:0	21:35:26	3
1904540	99	23	20,2	cyclictest	2164603	-21	kworker/u8:0+events_unbound	00:15:22	2
1904540	99	23	20,2	cyclictest	2070586	-21	kworker/u8:3+events_unbound	22:20:24	2
1904540	99	23	20,2	cyclictest	1930455	-21	kworker/u8:2+flush-259:0	19:50:22	2
1904540	99	23	19,3	cyclictest	2091805	-21	kworker/u8:2+events_unbound	22:30:53	2
1904540	99	23	19,3	cyclictest	2070586	-21	kworker/u8:3+flush-259:0	22:25:19	2
1904540	99	23	19,3	cyclictest	2055100	-21	kworker/u8:1+events_unbound	22:37:12	2
1904540	99	23	18,3	cyclictest	2008351	-21	kworker/u8:0+events_unbound	21:55:16	2
1904540	99	23	16,4	cyclictest	2060263	-21	awk	21:40:00	2
1904538	99	23	8,4	cyclictest	335557	-21	systemd-journal	00:00:00	1
1904544	99	22	17,4	cyclictest	2164603	-21	kworker/u8:0+flush-259:0	00:15:15	3
1904544	99	22	17,3	cyclictest	2185171	-21	sh	23:39:59	3
1904540	99	22	19,2	cyclictest	2236644	-21	kworker/u8:1+flush-259:0	00:30:17	2
1904540	99	22	19,2	cyclictest	2164603	-21	kworker/u8:0+events_unbound	23:40:26	2
1904540	99	22	17,3	cyclictest	2133507	-21	kworker/u8:4+flush-259:0	23:15:21	2
1904538	99	22	16,4	cyclictest	2190752	-21	diskstats	23:45:13	1
1904538	99	22	10,2	cyclictest	2237466	-21	irqcore	00:30:15	1
1904534	99	22	17,4	cyclictest	1987873	-21	/usr/sbin/munin	20:30:23	0
1904534	99	22	16,5	cyclictest	1986809	-21	ntpq	20:25:22	0
1904544	99	21	16,3	cyclictest	2029168	-21	kworker/u8:3+flush-259:0	21:10:24	3
1904544	99	21	14,5	cyclictest	335557	-21	systemd-journal	22:35:00	3
1904544	99	21	13,6	cyclictest	2049097	-21	ntpq	21:25:23	3
1904540	99	21	18,2	cyclictest	2164603	-21	kworker/u8:0+events_unbound	00:13:35	2
1904540	99	21	18,2	cyclictest	2128322	-21	kworker/u8:3+flush-259:0	23:30:24	2
1904540	99	21	18,2	cyclictest	1993059	-21	kworker/u8:2+events_unbound	20:37:29	2
1904540	99	21	17,3	cyclictest	2164603	-21	kworker/u8:0+events_unbound	23:50:16	2
1904538	99	21	16,4	cyclictest	335557	-21	systemd-journal	22:00:00	1
1904538	99	21	16,3	cyclictest	1904725	-21	kworker/u8:3+flush-259:0	19:15:16	1
1904534	99	21	17,2	cyclictest	1910016	-21	apt-get	19:15:12	0
1904534	99	21	16,4	cyclictest	2107707	-21	/usr/sbin/munin	22:25:15	0
1904544	99	20	17,2	cyclictest	1987652	-21	kworker/u8:1+events_unbound	21:05:18	3
1904544	99	20	17,2	cyclictest	1987652	-21	kworker/u8:1+events_unbound	21:05:17	3
1904544	99	20	14,4	cyclictest	2017815	-21	ntpq	20:55:22	3
1904544	99	20	14,4	cyclictest	2003174	-21	latency_hist	20:45:00	3
1904544	99	20	13,4	cyclictest	2153885	-21	latency_hist	23:10:01	3
1904544	99	20	0,18	cyclictest	2101952	-21	unin-run	22:20:01	3
1904540	99	20	17,2	cyclictest	2023797	-21	kworker/u8:2+events_unbound	21:25:13	2
1904540	99	20	16,3	cyclictest	335557	-21	systemd-journal	20:29:59	2
1904538	99	20	17,2	cyclictest	2128322	-21	kworker/u8:3+flush-259:0	23:30:15	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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