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 Sun Sep 06, 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
2177190	99	44	39,4	cyclictest	2514244	-21	cp	12:35:00	3
2177186	99	44	41,2	cyclictest	2249414	-21	kworker/u8:0+events_unbound	08:25:21	2
2177186	99	40	36,3	cyclictest	2192635	-21	kworker/u8:1+flush-259:0	08:20:11	2
2177186	99	37	33,3	cyclictest	2348063	-21	kworker/u8:4+events_unbound	10:04:01	2
2177186	99	34	31,2	cyclictest	2410208	-21	kworker/u8:0+flush-259:0	11:35:22	2
2177186	99	34	27,3	cyclictest	2384600	-21	kworker/u8:3+events_unbound	10:55:14	2
2177181	99	34	28,4	cyclictest	2478102	-21	apt-get	12:00:11	1
2177186	99	33	29,2	cyclictest	2358701	-21	kworker/u8:2+flush-259:0	10:05:15	2
2177179	99	33	29,3	cyclictest	2208353	-21	/usr/sbin/munin	07:40:15	0
2177190	99	32	27,4	cyclictest	2457481	-21	/usr/sbin/munin	11:40:16	3
2177179	99	32	29,2	cyclictest	2249414	-21	kworker/u8:0+flush-259:0	08:35:18	0
2177179	99	32	28,3	cyclictest	335557	-21	systemd-journal	07:29:29	0
2177186	99	31	28,2	cyclictest	2457281	-21	kworker/u8:3+flush-259:0	11:55:25	2
2177181	99	31	26,3	cyclictest	2503950	-21	/usr/sbin/munin	12:25:14	1
2177186	99	30	27,2	cyclictest	2228804	-21	kworker/u8:0+events_unbound	08:10:20	2
2177181	99	30	24,4	cyclictest	2367950	-21	ntpq	10:10:22	1
2177190	99	29	25,3	cyclictest	2457281	-21	kworker/u8:3+flush-259:0	12:10:25	3
2177186	99	29	26,2	cyclictest	2374292	-21	kworker/u8:2+flush-259:0	11:10:15	2
2177186	99	29	23,4	cyclictest	509	-21	rs:main		2
2177181	99	29	23,4	cyclictest	2274324	-21	ntpq	08:40:21	1
2177179	99	29	23,4	cyclictest	2322290	-21	latency_hist	09:30:01	0
2177186	99	28	24,3	cyclictest	2374292	-21	kworker/u8:2+events_unbound	10:25:14	2
2177186	99	28	24,3	cyclictest	2192635	-21	kworker/u8:1+events_unbound	08:40:15	2
2177181	99	28	23,3	cyclictest	2249386	-21	latency_hist	08:20:01	1
2177181	99	28	21,5	cyclictest	2347116	-21	ntpq	09:50:21	1
2177190	99	27	23,3	cyclictest	2311703	-21	kworker/u8:3+flush-259:0	09:45:25	3
2177190	99	27	22,3	cyclictest	2483008	-21	latency_hist	12:05:00	3
2177186	99	27	23,3	cyclictest	2374292	-21	kworker/u8:2+events_unbound	10:45:14	2
2177179	99	27	20,5	cyclictest	2300337	-21	ntpq	09:05:23	0
2177190	99	26	23,2	cyclictest	2348063	-21	kworker/u8:4+events_unbound	10:40:19	3
2177186	99	26	22,3	cyclictest	2457281	-21	kworker/u8:3+events_unbound	12:20:09	2
2177186	99	26	19,5	cyclictest	335557	-21	systemd-journal	09:53:07	2
2177181	99	26	21,3	cyclictest	2192868	-21	/usr/sbin/munin	07:25:20	1
2177179	99	26	23,2	cyclictest	2348306	-21	apt-get	09:55:11	0
2177186	99	25	22,2	cyclictest	2384600	-21	kworker/u8:3+events_unbound	10:40:15	2
2177186	99	25	22,2	cyclictest	2280414	-21	kworker/u8:0+events_unbound	09:30:20	2
2177186	99	25	21,3	cyclictest	2384600	-21	kworker/u8:3+events_unbound	10:30:15	2
2177186	99	25	20,3	cyclictest	2457281	-21	kworker/u8:3+flush-259:0	12:25:22	2
2177186	99	25	17,3	cyclictest	2280414	-21	kworker/u8:0+events_unbound	09:35:22	2
2177181	99	25	21,3	cyclictest	2301897	-21	apt-get	09:10:14	1
2177190	99	24	20,3	cyclictest	2374292	-21	kworker/u8:2+flush-259:0	10:45:20	3
2177190	99	24	19,4	cyclictest	2384638	-21	apt-get	10:30:11	3
2177190	99	24	18,4	cyclictest	335557	-21	systemd-journal	07:45:00	3
2177186	99	24	21,2	cyclictest	2374292	-21	kworker/u8:2+events_unbound	11:15:23	2
2177186	99	24	21,2	cyclictest	2177156	-21	kworker/u8:2+flush-259:0	07:25:24	2
2177186	99	24	20,3	cyclictest	2177156	-21	kworker/u8:2+events_unbound	07:20:21	2
2177186	99	24	17,3	cyclictest	2483252	-21	kworker/u8:0+events_unbound	12:15:00	2
2177190	99	23	19,3	cyclictest	2249629	-21	/usr/sbin/munin	08:20:13	3
2177190	99	23	19,3	cyclictest	2177404	-21	apt-get	07:10:10	3
2177186	99	23	20,2	cyclictest	2457281	-21	kworker/u8:3+flush-259:0	12:05:22	2
2177186	99	23	19,3	cyclictest	2483252	-21	kworker/u8:0+events_unbound	12:35:30	2
2177181	99	23	20,2	cyclictest	2177156	-21	kworker/u8:2+flush-259:0	07:30:21	1
2177181	99	23	19,3	cyclictest	509	-21	rs:main		1
2177181	99	23	17,5	cyclictest	2289849	-21	ntpq	08:55:23	1
2177179	99	23	20,2	cyclictest	2410208	-21	kworker/u8:0+flush-259:0	11:30:00	0
2177190	99	22	18,3	cyclictest	2415546	-21	gpgv	11:00:00	3
2177190	99	22	17,3	cyclictest	509	-21	rs:main		3
2177186	99	22	19,2	cyclictest	2374292	-21	kworker/u8:2+flush-259:0	11:00:25	2
2177186	99	22	19,2	cyclictest	2374292	-21	kworker/u8:2+events_unbound	11:25:21	2
2177186	99	22	19,2	cyclictest	2192635	-21	kworker/u8:1+events_unbound	08:15:14	2
2177186	99	22	19,2	cyclictest	2177156	-21	kworker/u8:2+flush-259:0	07:15:16	2
2177186	99	22	18,3	cyclictest	2337728	-21	kworker/u8:1+events_unbound	10:10:29	2
2177186	99	22	18,3	cyclictest	2192635	-21	kworker/u8:1+flush-259:0	08:05:17	2
2177186	99	22	18,3	cyclictest	2192635	-21	kworker/u8:1+flush-259:0	08:05:17	2
2177186	99	22	18,3	cyclictest	2192635	-21	kworker/u8:1+events_unbound	07:56:59	2
2177186	99	22	16,4	cyclictest	2202985	-21	latency_hist	07:35:01	2
2177186	99	22	13,3	cyclictest	2374292	-21	kworker/u8:2+events_unbound	11:30:20	2
2177181	99	22	16,5	cyclictest	2394993	-21	/usr/sbin/munin	10:40:15	1
2177179	99	22	19,2	cyclictest	2467510	-21	kworker/u8:1+events_unbound	11:50:14	0
2177179	99	22	18,3	cyclictest	2218715	-21	apt-get	07:50:11	0
2177190	99	21	17,3	cyclictest	2192635	-21	kworker/u8:1+flush-259:0	08:35:00	3
2177190	99	21	17,2	cyclictest	2374292	-21	kworker/u8:2+flush-259:0	11:45:15	3
2177190	99	21	16,3	cyclictest	335557	-21	systemd-journal	10:20:07	3
2177190	99	21	16,3	cyclictest	2333005	-21	diskstats	09:40:14	3
2177190	99	21	15,4	cyclictest	2269149	-21	ntpq	08:35:23	3
2177186	99	21	17,2	cyclictest	0	-21	swapper/2	09:10:00	2
2177186	99	21	16,4	cyclictest	2311703	-21	kworker/u8:3+flush-259:0	09:45:21	2
2177186	99	21	14,3	cyclictest	2374292	-21	kworker/u8:2+events_unbound	11:20:24	2
2177179	99	21	18,2	cyclictest	2457281	-21	kworker/u8:3+events_unbound	12:10:23	0
2177179	99	21	18,2	cyclictest	2243710	-21	kworker/u8:3+flush-259:0	08:15:13	0
2177179	99	21	14,5	cyclictest	2467540	-21	latency_hist	11:50:01	0
2177179	99	21	14,5	cyclictest	2409419	-21	ntpq	10:50:21	0
2177190	99	20	16,3	cyclictest	2467811	-21	apt-get	11:50:11	3
2177190	99	20	14,5	cyclictest	2416026	-21	cat	11:00:01	3
2177190	99	20	14,4	cyclictest	2239054	-21	latency_hist	08:10:01	3
2177190	99	20	14,4	cyclictest	2239054	-21	latency_hist	08:10:00	3
2177186	99	20	17,2	cyclictest	2311703	-21	kworker/u8:3+flush-259:0	09:20:20	2
2177186	99	20	17,2	cyclictest	2249414	-21	kworker/u8:0+events_unbound	08:30:15	2
2177186	99	20	16,3	cyclictest	2139012	-21	kworker/u8:0+events_unbound	07:35:20	2
2177186	99	20	15,4	cyclictest	507	-21	in:imuxsock	11:50:00	2
2177181	99	20	16,3	cyclictest	2431564	-21	apt-get	11:15:11	1
2177181	99	20	16,3	cyclictest	2182559	-21	apt-get	07:15:13	1
2177181	99	20	13,5	cyclictest	335557	-21	systemd-journal	08:00:00	1
2177179	99	20	17,2	cyclictest	2483252	-21	kworker/u8:0+flush-259:0	12:35:20	0
2177179	99	20	16,3	cyclictest	2384600	-21	kworker/u8:3+flush-259:0	10:30:21	0
2177179	99	20	16,3	cyclictest	2327689	-21	apt-get	09:35:11	0
2177179	99	20	14,3	cyclictest	2177156	-21	kworker/u8:2+flush-259:0	07:30:14	0
2177190	99	19	17,1	cyclictest	2249394	-21	munin-plugin-st	08:20:00	3
2177190	99	19	15,3	cyclictest	2264905	-21	kworker/u8:2+flush-259:0	08:45:00	3
2177186	99	19	16,2	cyclictest	2421008	-21	kworker/u8:1+events_unbound	11:05:15	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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