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 Tue Dec 23, 2025 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1504253	99	38	31,5	cyclictest	1737595	-21	latency_hist	10:55:01	2
1504255	99	33	27,4	cyclictest	252	-21	systemd-journal	09:50:00	3
1504253	99	33	26,5	cyclictest	1700132	-21	ntpq	10:15:22	2
1504245	99	33	31,1	cyclictest	1799875	-21	kworker/0:0+pm	11:57:12	0
1504255	99	32	27,3	cyclictest	1494191	-21	kworker/u8:1+flush-259:0	07:15:00	3
1504253	99	30	23,5	cyclictest	1711744	-21	diskstats	10:30:12	2
1504253	99	30	22,5	cyclictest	1582093	-21	latency_hist	08:25:01	2
1504255	99	29	25,3	cyclictest	1768951	-21	kworker/u8:0+flush-259:0	11:40:18	3
1504253	99	29	24,4	cyclictest	1810212	-21	kworker/u8:1+flush-259:0	12:05:16	2
1504249	99	28	25,2	cyclictest	1555844	-21	kworker/u8:1+flush-259:0	08:55:22	1
1504255	99	27	22,4	cyclictest	1841239	-21	latency_hist	12:35:00	3
1504255	99	26	20,4	cyclictest	1623313	-21	latency_hist	09:05:01	3
1504249	99	26	23,2	cyclictest	1794942	-21	kworker/u8:3+events_unbound	12:10:18	1
1504249	99	26	22,3	cyclictest	1794942	-21	kworker/u8:3+events_unbound	11:55:23	1
1504249	99	26	22,3	cyclictest	1727036	-21	kworker/u8:4+flush-259:0	11:10:21	1
1504249	99	26	22,3	cyclictest	1455076	-21	kworker/u8:3+flush-259:0	07:35:22	1
1504249	99	26	22,3	cyclictest	1455076	-21	kworker/u8:3+flush-259:0	07:35:22	1
1504249	99	25	22,2	cyclictest	1768951	-21	kworker/u8:0+flush-259:0	11:35:30	1
1504245	99	25	22,2	cyclictest	1460263	-21	kworker/u8:5+flush-259:0	07:25:21	0
1504245	99	25	20,4	cyclictest	1654683	-21	diskstats	09:35:15	0
1504249	99	24	21,2	cyclictest	1566409	-21	kworker/u8:0+flush-259:0	09:20:20	1
1504249	99	24	20,3	cyclictest	1794942	-21	kworker/u8:3+flush-259:0	12:25:23	1
1504245	99	24	21,2	cyclictest	1825438	-21	kworker/u8:0+flush-259:0	12:20:15	0
1504255	99	23	19,3	cyclictest	252	-21	systemd-journal	09:35:18	3
1504253	99	23	15,6	cyclictest	252	-21	systemd-journal	11:39:59	2
1504249	99	23	21,2	cyclictest	1758625	-21	kworker/u8:1+flush-259:0	11:50:25	1
1504249	99	23	20,2	cyclictest	1566409	-21	kworker/u8:0+events_unbound	09:50:14	1
1504249	99	23	19,3	cyclictest	1555844	-21	kworker/u8:1+flush-259:0	08:25:00	1
1504255	99	22	20,1	cyclictest	1804751	-21	fwupd	11:57:10	3
1504255	99	22	18,3	cyclictest	1768951	-21	kworker/u8:0+flush-259:0	11:25:21	3
1504255	99	22	17,3	cyclictest	1664583	-21	latency_hist	09:45:01	3
1504255	99	22	17,3	cyclictest	1498662	-21	kworker/u8:2+flush-259:0	07:45:00	3
1504253	99	22	15,5	cyclictest	252	-21	systemd-journal	08:58:17	2
1504249	99	22	20,2	cyclictest	1607727	-21	kworker/u8:2+events_unbound	09:15:22	1
1504249	99	22	18,3	cyclictest	1810212	-21	kworker/u8:1+flush-259:0	12:05:21	1
1504249	99	22	18,3	cyclictest	1498662	-21	kworker/u8:2+flush-259:0	07:20:25	1
1504253	99	21	4,4	cyclictest	1710415	-21	ntpq	10:25:21	2
1504249	99	21	17,3	cyclictest	1524481	-21	kworker/u8:0+events_unbound	07:50:20	1
1504249	99	21	15,4	cyclictest	1561278	-21	/usr/sbin/munin	08:05:15	1
1504245	99	21	17,3	cyclictest	1530062	-21	kworker/u8:4+events_unbound	07:45:22	0
1504255	99	20	17,2	cyclictest	1711550	-21	kworker/u8:4+flush-259:0	10:35:16	3
1504255	99	20	16,3	cyclictest	1669957	-21	apt-get	09:50:11	3
1504249	99	20	16,3	cyclictest	1654487	-21	kworker/u8:1+events_unbound	09:35:23	1
1504249	99	20	16,3	cyclictest	1566409	-21	kworker/u8:0+flush-259:0	10:25:19	1
1504249	99	20	16,3	cyclictest	1566409	-21	kworker/u8:0+flush-259:0	08:30:19	1
1504249	99	20	15,3	cyclictest	1566418	-21	/usr/sbin/munin	08:10:15	1
1504249	99	20	14,5	cyclictest	1663695	-21	ntpq	09:40:20	1
1504245	99	20	17,2	cyclictest	1690308	-21	kworker/u8:2+flush-259:0	10:45:17	0
1504255	99	19	14,3	cyclictest	1726714	-21	kworker/u8:3+flush-259:0	11:00:17	3
1504253	99	19	4,4	cyclictest	1674012	-21	ld	09:50:21	2
1504253	99	19	14,4	cyclictest	1727036	-21	kworker/u8:4+flush-259:0	11:15:00	2
1504253	99	19	13,4	cyclictest	1820526	-21	latency_hist	12:15:01	2
1504253	99	19	12,5	cyclictest	1695855	-21	latency_hist	10:15:00	2
1504249	99	19	6,7	cyclictest	1700962	-21	idleruntime-cro	10:20:00	1
1504249	99	19	16,2	cyclictest	1810212	-21	kworker/u8:1+flush-259:0	12:30:15	1
1504249	99	19	16,2	cyclictest	1768951	-21	kworker/u8:0+flush-259:0	11:40:24	1
1504249	99	19	16,2	cyclictest	1726714	-21	kworker/u8:3+flush-259:0	11:00:00	1
1504249	99	19	16,2	cyclictest	1690308	-21	kworker/u8:2+flush-259:0	10:35:17	1
1504249	99	19	16,2	cyclictest	1455076	-21	kworker/u8:3+events_unbound	08:00:17	1
1504249	99	19	15,3	cyclictest	1784618	-21	kworker/u8:4+flush-259:0	11:49:59	1
1504249	99	19	15,3	cyclictest	1455076	-21	kworker/u8:3+flush-259:0	08:20:00	1
1504249	99	19	14,4	cyclictest	1732485	-21	base64	10:50:01	1
1504249	99	19	14,3	cyclictest	1841262	-21	kworker/u8:4+flush-259:0	12:35:22	1
1504245	99	19	17,1	cyclictest	1638523	-21	kworker/u8:3+flush-259:0	09:45:18	0
1504245	99	19	16,3	cyclictest	1524481	-21	kworker/u8:0+events_unbound	07:30:20	0
1504245	99	19	16,2	cyclictest	1607727	-21	kworker/u8:2+flush-259:0	08:50:24	0
1504245	99	19	16,2	cyclictest	1530062	-21	kworker/u8:4+flush-259:0	08:00:15	0
1504245	99	19	15,3	cyclictest	1810212	-21	kworker/u8:1+flush-259:0	12:10:19	0
1504245	99	19	15,3	cyclictest	1706388	-21	kworker/u8:1+events_unbound	10:55:20	0
1504245	99	19	15,3	cyclictest	1566409	-21	kworker/u8:0+flush-259:0	10:25:15	0
1504245	99	19	13,4	cyclictest	1690268	-21	latency_hist	10:10:00	0
1504255	99	18	15,3	cyclictest	1758625	-21	kworker/u8:1+flush-259:0	11:45:23	3
1504255	99	18	15,2	cyclictest	1810212	-21	kworker/u8:1+flush-259:0	12:15:25	3
1504255	99	18	15,1	cyclictest	0	-21	swapper/3	10:50:01	3
1504255	99	18	14,3	cyclictest	1566409	-21	kworker/u8:0+flush-259:0	09:25:18	3
1504255	99	18	14,3	cyclictest	1455076	-21	kworker/u8:3+flush-259:0	08:45:16	3
1504255	99	18	13,3	cyclictest	252	-21	systemd-journal	07:21:16	3
1504253	99	18	16,1	cyclictest	0	-21	swapper/2	09:10:00	2
1504253	99	18	14,2	cyclictest	1555844	-21	kworker/u8:1+events_unbound	08:15:18	2
1504253	99	18	14,2	cyclictest	0	-21	swapper/2	08:45:00	2
1504253	99	18	13,3	cyclictest	1690295	-21	gpgv	10:10:01	2
1504249	99	18	16,2	cyclictest	1530062	-21	kworker/u8:4+events_unbound	07:55:22	1
1504249	99	18	15,3	cyclictest	1460263	-21	kworker/u8:5+events_unbound	07:25:22	1
1504249	99	18	14,3	cyclictest	1711584	-21	apt-get	10:30:11	1
1504249	99	18	14,3	cyclictest	1566409	-21	kworker/u8:0+flush-259:0	10:20:15	1
1504249	99	18	13,3	cyclictest	1721883	-21	apt-get	10:40:10	1
1504249	99	18	13,3	cyclictest	1524481	-21	kworker/u8:0+flush-259:0	07:40:17	1
1504245	99	18	16,2	cyclictest	1706388	-21	kworker/u8:1+events_unbound	10:50:27	0
1504245	99	18	15,2	cyclictest	1841665	-21	diskstats	12:35:16	0
1504245	99	18	15,2	cyclictest	1669636	-21	kworker/u8:1+flush-259:0	10:00:21	0
1504245	99	18	14,3	cyclictest	1669636	-21	kworker/u8:1+events_unbound	10:15:24	0
1504245	99	18	14,2	cyclictest	1768951	-21	kworker/u8:0+flush-259:0	11:35:20	0
1504255	99	17	15,1	cyclictest	1571467	-21	cp	08:15:00	3
1504255	99	17	14,2	cyclictest	1607727	-21	kworker/u8:2+events_unbound	08:55:15	3
1504255	99	17	13,3	cyclictest	1455076	-21	kworker/u8:3+flush-259:0	08:05:17	3
1504255	99	17	12,3	cyclictest	252	-21	systemd-journal	11:31:20	3
1504253	99	17	4,7	cyclictest	1603119	-21	df	08:45:14	2
1504253	99	17	2,4	cyclictest	1596731	-21	ld	08:35:22	2
1504249	99	17	14,2	cyclictest	1494191	-21	kworker/u8:1+events_unbound	07:10:23	1
1504249	99	17	13,3	cyclictest	1810212	-21	kworker/u8:1+flush-259:0	12:15:19	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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