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 Jun 02, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1758258	99	43	39,3	cyclictest	1998653	-21	kworker/u8:0+flush-259:0	11:15:16	1
1758256	99	40	34,4	cyclictest	2055414	-21	latency_hist	11:55:01	0
1758261	99	36	32,3	cyclictest	1877776	-21	kworker/u8:0+flush-259:0	10:10:01	2
1758266	99	33	27,4	cyclictest	335557	-21	systemd-journal	11:20:26	3
1758256	99	33	26,5	cyclictest	335557	-21	systemd-journal	09:00:00	0
1758258	99	32	26,4	cyclictest	1899395	-21	/usr/sbin/munin	09:25:14	1
1758256	99	32	26,4	cyclictest	1825701	-21	latency_hist	08:15:00	0
1758258	99	31	27,3	cyclictest	1877776	-21	kworker/u8:0+flush-259:0	09:50:01	1
1758258	99	31	27,3	cyclictest	1799827	-21	kworker/u8:0+flush-259:0	08:14:59	1
1758258	99	31	25,4	cyclictest	1892726	-21	ntpq	09:15:22	1
1758258	99	31	25,4	cyclictest	1883123	-21	store	09:10:01	1
1758258	99	31	25,4	cyclictest	1793927	-21	ntpq	07:40:24	1
1758261	99	30	25,3	cyclictest	2034958	-21	apt-get	11:35:13	2
1758258	99	30	25,3	cyclictest	2091964	-21	kworker/u8:1+flush-259:0	12:35:01	1
1758258	99	30	23,4	cyclictest	2060181	-21	ntpq	11:55:22	1
1758256	99	30	25,4	cyclictest	335557	-21	systemd-journal	11:30:00	0
1758266	99	29	23,4	cyclictest	335557	-21	systemd-journal	12:15:00	3
1758261	99	29	25,3	cyclictest	1961437	-21	kworker/u8:0+flush-259:0	10:29:59	2
1758258	99	29	24,3	cyclictest	1779140	-21	apt-get	07:30:11	1
1758258	99	29	22,5	cyclictest	2085963	-21	ntpq	12:20:21	1
1758258	99	29	21,5	cyclictest	2045013	-21	latency_hist	11:45:01	1
1758261	99	28	25,2	cyclictest	1904313	-21	kworker/u8:2+events_unbound	09:35:18	2
1758261	99	28	24,3	cyclictest	2071410	-21	kworker/u8:0+flush-259:0	12:10:25	2
1758261	99	28	20,6	cyclictest	335557	-21	systemd-journal	08:15:00	2
1758266	99	27	22,4	cyclictest	335557	-21	systemd-journal	10:05:00	3
1758261	99	27	21,4	cyclictest	335557	-21	systemd-journal	12:30:27	2
1758261	99	27	21,4	cyclictest	335557	-21	systemd-journal	09:17:27	2
1758258	99	27	23,3	cyclictest	1867136	-21	kworker/u8:3+flush-259:0	08:55:00	1
1758258	99	27	22,3	cyclictest	1784629	-21	cat	07:35:01	1
1758266	99	26	23,2	cyclictest	1950621	-21	kworker/u8:3+events_unbound	10:45:15	3
1758261	99	26	21,3	cyclictest	1758221	-21	kworker/u8:3+flush-259:0	07:25:22	2
1758258	99	26	20,4	cyclictest	1758198	-21	latency_hist	07:10:01	1
1758258	99	26	19,4	cyclictest	1909697	-21	/usr/sbin/munin	09:35:14	1
1758266	99	25	22,2	cyclictest	2045247	-21	kworker/u8:2+events_unbound	12:09:57	3
1758266	99	25	21,3	cyclictest	1904313	-21	kworker/u8:2+events_unbound	09:59:57	3
1758266	99	25	21,2	cyclictest	2852396	-21	kworker/u8:2+events_unbound	07:40:03	3
1758261	99	25	21,3	cyclictest	1998653	-21	kworker/u8:0+events_unbound	11:15:23	2
1758258	99	25	22,2	cyclictest	1955850	-21	kworker/u8:1+flush-259:0	10:30:26	1
1758266	99	24	21,2	cyclictest	1789598	-21	cron	07:40:00	3
1758266	99	24	20,3	cyclictest	1899291	-21	gpgv	09:25:01	3
1758261	99	24	20,3	cyclictest	1904313	-21	kworker/u8:2+events_unbound	09:40:28	2
1758261	99	24	20,3	cyclictest	1836712	-21	kworker/u8:1+events_unbound	08:37:28	2
1758261	99	24	20,3	cyclictest	1836712	-21	kworker/u8:1+events_unbound	08:37:27	2
1758256	99	24	20,3	cyclictest	1882913	-21	http	09:10:01	0
1758256	99	24	18,4	cyclictest	1763381	-21	latency_hist	07:15:02	0
1758266	99	23	20,2	cyclictest	1950621	-21	kworker/u8:3+events_unbound	11:39:57	3
1758266	99	23	20,2	cyclictest	1846738	-21	kworker/u8:2+events_unbound	09:21:28	3
1758261	99	23	16,5	cyclictest	2070459	-21	ntpq	12:05:21	2
1758258	99	23	19,3	cyclictest	2091925	-21	apt-get	12:29:20	1
1758258	99	23	19,3	cyclictest	1846738	-21	kworker/u8:2+flush-259:0	09:00:24	1
1758258	99	23	16,4	cyclictest	1914881	-21	/usr/sbin/munin	09:40:14	1
1758266	99	22	19,2	cyclictest	2045247	-21	kworker/u8:2+events_unbound	12:19:56	3
1758261	99	22	19,2	cyclictest	1950621	-21	kworker/u8:3+events_unbound	10:17:28	2
1758261	99	22	18,3	cyclictest	2852396	-21	kworker/u8:2+flush-259:0	07:15:20	2
1758261	99	22	18,3	cyclictest	1955850	-21	kworker/u8:1+events_unbound	10:30:18	2
1758261	99	22	18,3	cyclictest	1904313	-21	kworker/u8:2+events_unbound	09:46:28	2
1758261	99	22	17,3	cyclictest	335557	-21	systemd-journal	09:30:26	2
1758261	99	22	17,3	cyclictest	1877776	-21	kworker/u8:0+flush-259:0	09:55:21	2
1758261	99	22	16,4	cyclictest	335557	-21	systemd-journal	10:55:00	2
1758261	99	22	15,5	cyclictest	1798965	-21	ntpq	07:45:19	2
1758261	99	22	15,5	cyclictest	1784017	-21	latency_hist	07:35:01	2
1758258	99	22	18,3	cyclictest	2045033	-21	kworker/u8:1+flush-259:0	11:45:26	1
1758258	99	22	17,3	cyclictest	1988136	-21	kworker/u8:4+flush-259:0	11:25:16	1
1758258	99	22	16,4	cyclictest	1835588	-21	ntpq	08:20:19	1
1758266	99	21	16,4	cyclictest	1882890	-21	apt-get	09:10:00	3
1758266	99	21	15,2	cyclictest	1852231	-21	apt-get	08:40:11	3
1758266	99	21	13,6	cyclictest	1966989	-21	cat	10:30:00	3
1758261	99	21	18,2	cyclictest	1988136	-21	kworker/u8:4+flush-259:0	11:05:22	2
1758261	99	21	18,2	cyclictest	1988136	-21	kworker/u8:4+flush-259:0	11:05:22	2
1758261	99	21	17,2	cyclictest	1950621	-21	kworker/u8:3+flush-259:0	10:50:00	2
1758261	99	21	16,3	cyclictest	1784676	-21	kworker/u8:1+events_unbound	08:00:12	2
1758258	99	21	18,2	cyclictest	1950621	-21	kworker/u8:3+events_unbound	11:00:18	1
1758258	99	21	17,3	cyclictest	2045033	-21	kworker/u8:1+flush-259:0	11:50:16	1
1758258	99	21	16,4	cyclictest	1758221	-21	kworker/u8:3+flush-259:0	07:45:15	1
1758266	99	20	18,2	cyclictest	2852396	-21	kworker/u8:2+events_unbound	07:34:00	3
1758266	99	20	17,2	cyclictest	1998653	-21	kworker/u8:0+events_unbound	11:27:35	3
1758266	99	20	17,2	cyclictest	1950621	-21	kworker/u8:3+events_unbound	11:45:01	3
1758266	99	20	17,2	cyclictest	1950621	-21	kworker/u8:3+events_unbound	11:03:40	3
1758266	99	20	17,2	cyclictest	1784676	-21	kworker/u8:1+events_unbound	08:09:44	3
1758266	99	20	15,3	cyclictest	335557	-21	systemd-journal	09:36:26	3
1758261	99	20	16,3	cyclictest	1867136	-21	kworker/u8:3+events_unbound	09:05:14	2
1758261	99	20	16,3	cyclictest	1820513	-21	kworker/u8:4+events_unbound	08:20:14	2
1758261	99	20	16,2	cyclictest	0	-21	swapper/2	09:05:01	2
1758258	99	20	16,3	cyclictest	1820512	-21	kworker/u8:3+flush-259:0	08:10:00	1
1758258	99	20	14,4	cyclictest	2076521	-21	latency_hist	12:15:01	1
1758258	99	20	14,4	cyclictest	1972719	-21	apt-get	10:35:13	1
1758266	99	19	17,2	cyclictest	2091964	-21	kworker/u8:1+events_unbound	12:29:36	3
1758266	99	19	16,2	cyclictest	2045033	-21	kworker/u8:1+events_unbound	11:53:35	3
1758266	99	19	16,2	cyclictest	1998653	-21	kworker/u8:0+events_unbound	11:10:31	3
1758266	99	19	16,2	cyclictest	1820514	-21	kworker/u8:5+events_unbound	08:15:49	3
1758266	99	19	16,2	cyclictest	1784676	-21	kworker/u8:1+events_unbound	08:04:05	3
1758266	99	19	16,2	cyclictest	1784676	-21	kworker/u8:1+events_unbound	07:53:38	3
1758266	99	19	16,2	cyclictest	1758221	-21	kworker/u8:3+events_unbound	07:24:47	3
1758266	99	19	15,3	cyclictest	1940882	-21	apt-get	10:05:12	3
1758266	99	19	14,4	cyclictest	1982761	-21	latency_hist	10:45:01	3
1758261	99	19	17,1	cyclictest	1799827	-21	kworker/u8:0+events_unbound	07:50:13	2
1758261	99	19	16,2	cyclictest	1988136	-21	kworker/u8:4+events_unbound	11:30:18	2
1758261	99	19	16,2	cyclictest	1950621	-21	kworker/u8:3+flush-259:0	10:55:24	2
1758261	99	19	15,3	cyclictest	2071410	-21	kworker/u8:0+events_unbound	12:15:18	2
1758261	99	19	15,3	cyclictest	1898437	-21	kworker/u8:1+flush-259:0	09:25:17	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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