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 Wed Apr 29, 2026 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2038073	99	44	42,1	cyclictest	2266531	-21	fwupd	10:46:27	3
2038067	99	41	37,3	cyclictest	2126404	-21	kworker/u8:3+flush-259:0	08:50:15	1
2038070	99	38	36,2	cyclictest	2246187	-21	kworker/u8:4+events_unbound	11:30:02	2
2038070	99	38	34,3	cyclictest	2234736	-21	kworker/u8:0+events_unbound	10:35:02	2
2038067	99	38	34,3	cyclictest	2147020	-21	kworker/u8:2+events_unbound	09:25:23	1
2038067	99	38	34,3	cyclictest	2085036	-21	kworker/u8:2+events_unbound	08:25:21	1
2038067	99	37	31,2	cyclictest	2183683	-21	kworker/u8:1+events_unbound	10:20:21	1
2038063	99	37	30,5	cyclictest	2167602	-21	latency_hist	09:15:01	0
2038070	99	36	33,2	cyclictest	2157328	-21	kworker/u8:3+events_unbound	09:54:06	2
2038070	99	36	33,2	cyclictest	2053935	-21	kworker/u8:3+events_unbound	07:40:25	2
2038070	99	35	30,4	cyclictest	2048872	-21	cat	07:20:01	2
2038067	99	35	32,2	cyclictest	2105400	-21	kworker/u8:1+flush-259:0	08:30:24	1
2038067	99	35	29,2	cyclictest	2147020	-21	kworker/u8:2+events_unbound	08:55:12	1
2038070	99	34	31,2	cyclictest	2167642	-21	kworker/u8:1+events_unbound	09:18:03	2
2038070	99	34	31,2	cyclictest	2126404	-21	kworker/u8:3+events_unbound	08:40:23	2
2038070	99	34	30,3	cyclictest	2085036	-21	kworker/u8:2+events_unbound	08:27:06	2
2038070	99	34	30,3	cyclictest	2079699	-21	kworker/u8:0+events_unbound	07:56:07	2
2038067	99	34	27,3	cyclictest	2313963	-21	kworker/u8:3+events_unbound	11:50:22	1
2038067	99	33	30,2	cyclictest	2131773	-21	kworker/u8:0+events_unbound	09:10:21	1
2038067	99	33	29,3	cyclictest	2157328	-21	kworker/u8:3+flush-259:0	09:20:05	1
2038067	99	33	27,2	cyclictest	2053935	-21	kworker/u8:3+flush-259:0	07:50:00	1
2038070	99	32	29,2	cyclictest	2234736	-21	kworker/u8:0+events_unbound	10:43:08	2
2038070	99	31	28,2	cyclictest	2183683	-21	kworker/u8:1+events_unbound	11:28:06	2
2038067	99	31	27,3	cyclictest	2246187	-21	kworker/u8:4+flush-259:0	11:00:06	1
2038067	99	31	27,2	cyclictest	2053935	-21	kworker/u8:3+events_unbound	07:30:13	1
2038067	99	31	25,4	cyclictest	2198073	-21	ntpq	09:40:22	1
2038073	99	30	24,4	cyclictest	2235630	-21	cp	10:20:01	3
2038070	99	30	28,2	cyclictest	2246187	-21	kworker/u8:4+events_unbound	10:51:06	2
2038070	99	30	27,2	cyclictest	2267077	-21	kworker/u8:2+events_unbound	10:57:06	2
2038070	99	30	26,3	cyclictest	2246187	-21	kworker/u8:4+events_unbound	10:46:06	2
2038073	99	29	25,3	cyclictest	2147020	-21	kworker/u8:2+flush-259:0	09:30:00	3
2038070	99	29	27,2	cyclictest	2157328	-21	kworker/u8:3+events_unbound	10:15:24	2
2038070	99	29	26,2	cyclictest	2147020	-21	kworker/u8:2+events_unbound	08:56:06	2
2038067	99	29	26,2	cyclictest	2131773	-21	kworker/u8:0+flush-259:0	09:00:06	1
2038067	99	29	26,2	cyclictest	2126404	-21	kworker/u8:3+events_unbound	08:45:18	1
2038067	99	29	25,3	cyclictest	2085036	-21	kworker/u8:2+flush-259:0	08:17:05	1
2038063	99	29	24,4	cyclictest	2152433	-21	apt-get	09:00:11	0
2038070	99	28	26,2	cyclictest	2105400	-21	kworker/u8:1+events_unbound	08:33:05	2
2038070	99	28	25,2	cyclictest	2183683	-21	kworker/u8:1+events_unbound	11:12:07	2
2038070	99	28	25,2	cyclictest	2022701	-21	kworker/u8:1+events_unbound	07:37:07	2
2038070	99	28	22,4	cyclictest	2178306	-21	latency_hist	09:25:00	2
2038067	99	28	25,2	cyclictest	2350292	-21	kworker/u8:2+flush-259:0	12:35:23	1
2038067	99	28	25,2	cyclictest	2246187	-21	kworker/u8:4+flush-259:0	12:10:16	1
2038067	99	28	25,2	cyclictest	2198971	-21	kworker/u8:0+flush-259:0	10:00:16	1
2038067	99	28	25,2	cyclictest	2053935	-21	kworker/u8:3+flush-259:0	07:25:25	1
2038067	99	28	23,2	cyclictest	2361028	-21	kworker/u8:3+events_unbound	12:20:15	1
2038070	99	27	24,2	cyclictest	2183683	-21	kworker/u8:1+events_unbound	11:07:07	2
2038067	99	27	24,2	cyclictest	2323940	-21	kworker/u8:1+flush-259:0	12:25:16	1
2038067	99	27	24,2	cyclictest	2032917	-21	kworker/u8:0+events_unbound	07:20:21	1
2038073	99	26	22,3	cyclictest	2022701	-21	kworker/u8:1+flush-259:0	07:20:01	3
2038073	99	26	20,4	cyclictest	2183877	-21	diskstats	09:30:15	3
2038070	99	26	23,2	cyclictest	2375411	-21	kworker/u8:0+events_unbound	12:33:06	2
2038067	99	26	23,2	cyclictest	2219719	-21	kworker/u8:4+events_unbound	10:08:12	1
2038067	99	26	23,2	cyclictest	2022701	-21	kworker/u8:1+events_unbound	07:15:22	1
2038067	99	26	20,2	cyclictest	2234736	-21	kworker/u8:0+events_unbound	10:45:00	1
2038063	99	26	24,1	cyclictest	2240660	-21	kworker/0:0+pm	10:46:29	0
2038073	99	25	20,3	cyclictest	2345310	-21	latency_hist	12:05:01	3
2038073	99	25	19,4	cyclictest	252	-21	systemd-journal	10:10:00	3
2038070	99	25	22,2	cyclictest	2198971	-21	kworker/u8:0+events_unbound	10:03:10	2
2038070	99	25	22,2	cyclictest	2022701	-21	kworker/u8:1+events_unbound	07:27:40	2
2038067	99	25	23,2	cyclictest	2183683	-21	kworker/u8:1+flush-259:0	11:28:25	1
2038067	99	25	21,3	cyclictest	2246187	-21	kworker/u8:4+events_unbound	10:46:28	1
2038063	99	25	22,2	cyclictest	2064481	-21	apt-get	07:35:10	0
2038070	99	24	22,2	cyclictest	2095118	-21	kworker/u8:3+events_unbound	08:16:05	2
2038070	99	24	21,2	cyclictest	2339700	-21	kworker/u8:0+events_unbound	12:02:07	2
2038067	99	24	21,2	cyclictest	2323940	-21	kworker/u8:1+events_unbound	12:15:13	1
2038067	99	24	21,2	cyclictest	2313963	-21	kworker/u8:3+events_unbound	11:45:23	1
2038067	99	24	21,2	cyclictest	2298483	-21	kworker/u8:0+events_unbound	11:30:22	1
2038067	99	24	21,2	cyclictest	2183683	-21	kworker/u8:1+flush-259:0	09:50:15	1
2038073	99	23	17,4	cyclictest	252	-21	systemd-journal	07:27:05	3
2038073	99	23	17,4	cyclictest	2298246	-21	latency_hist	11:20:00	3
2038070	99	23	21,2	cyclictest	2313963	-21	kworker/u8:3+events_unbound	11:49:07	2
2038070	99	23	21,2	cyclictest	2313963	-21	kworker/u8:3+events_unbound	11:39:06	2
2038070	99	23	19,3	cyclictest	2183683	-21	kworker/u8:1+events_unbound	10:13:08	2
2038067	99	23	20,2	cyclictest	2183683	-21	kworker/u8:1+flush-259:0	11:05:21	1
2038067	99	23	20,2	cyclictest	2079699	-21	kworker/u8:0+events_unbound	08:00:22	1
2038067	99	23	20,2	cyclictest	2022701	-21	kworker/u8:1+events_unbound	07:35:18	1
2038063	99	23	17,4	cyclictest	2260880	-21	ntpq	10:40:21	0
2038073	99	22	19,2	cyclictest	2033106	-21	kworker/u8:4+flush-259:0	07:10:21	3
2038070	99	22	19,2	cyclictest	2361028	-21	kworker/u8:3+events_unbound	12:20:20	2
2038070	99	22	19,2	cyclictest	2079699	-21	kworker/u8:0+events_unbound	08:01:06	2
2038070	99	22	16,2	cyclictest	2085036	-21	kworker/u8:2+events_unbound	08:13:06	2
2038067	99	22	20,2	cyclictest	2323940	-21	kworker/u8:1+events_unbound	11:55:16	1
2038067	99	22	19,2	cyclictest	2246187	-21	kworker/u8:4+flush-259:0	10:50:27	1
2038067	99	22	19,2	cyclictest	2183683	-21	kworker/u8:1+events_unbound	10:10:22	1
2038067	99	22	19,2	cyclictest	2085036	-21	kworker/u8:2+events_unbound	08:10:22	1
2038067	99	22	16,4	cyclictest	2293499	-21	diskstats	11:15:15	1
2038063	99	22	16,5	cyclictest	2172329	-21	ntpq	09:15:21	0
2038063	99	22	16,5	cyclictest	2110522	-21	latency_hist	08:20:01	0
2038063	99	22	0,21	cyclictest	1	-21	systemd	12:26:06	0
2038073	99	21	15,4	cyclictest	2100482	-21	/usr/sbin/munin	08:10:15	3
2038073	99	21	14,5	cyclictest	2089047	-21	ntpq	07:55:21	3
2038067	99	21	18,2	cyclictest	2157328	-21	kworker/u8:3+flush-259:0	10:15:21	1
2038067	99	21	18,2	cyclictest	2079699	-21	kworker/u8:0+flush-259:0	08:05:21	1
2038067	99	21	18,2	cyclictest	2079699	-21	kworker/u8:0+events_unbound	07:55:21	1
2038067	99	21	18,2	cyclictest	2022701	-21	kworker/u8:1+flush-259:0	07:50:05	1
2038073	99	20	16,3	cyclictest	2235112	-21	gpgv	10:20:01	3
2038070	99	20	18,2	cyclictest	2323940	-21	kworker/u8:1+events_unbound	12:16:06	2
2038070	99	20	18,2	cyclictest	2298483	-21	kworker/u8:0+events_unbound	11:21:06	2
2038070	99	20	17,2	cyclictest	2313963	-21	kworker/u8:3+events_unbound	11:51:06	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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