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 Sat Dec 06, 2025 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2965095	99	47	45,1	cyclictest	3073646	-21	fwupd	20:52:05	2
2965095	99	42	36,4	cyclictest	3241197	-21	kworker/u8:2+flush-259:0	23:40:00	2
2965089	99	39	32,5	cyclictest	3283166	-21	diskstats	00:15:14	0
2965093	99	37	30,5	cyclictest	2698871	-21	systemd-journal	00:40:00	1
2965089	99	35	29,5	cyclictest	3178996	-21	kworker/u8:1+events_unbound	23:30:01	0
2965099	99	34	28,4	cyclictest	3110936	-21	latency_hist	21:30:00	3
2965099	99	34	27,5	cyclictest	2990747	-21	latency_hist	19:35:00	3
2965095	99	34	26,6	cyclictest	3122119	-21	latency_hist	21:40:00	2
2965089	99	34	29,3	cyclictest	3262392	-21	/usr/sbin/munin	23:55:17	0
2965099	99	33	20,12	cyclictest	3000061	-21	in:imuxsock	21:35:00	3
2965093	99	32	27,4	cyclictest	2698871	-21	systemd-journal	20:30:00	1
2965089	99	31	27,3	cyclictest	3225789	-21	kworker/u8:4+flush-259:0	00:20:12	0
2965099	99	29	23,4	cyclictest	3200354	-21	latency_hist	22:55:01	3
2965095	99	29	26,2	cyclictest	3058504	-21	kworker/u8:1+flush-259:0	21:15:18	2
2965089	99	29	23,4	cyclictest	3116533	-21	apt-get	21:35:02	0
2965089	99	29	21,6	cyclictest	2698871	-21	systemd-journal	23:45:00	0
2965095	99	28	24,3	cyclictest	3132488	-21	kworker/u8:3+flush-259:0	22:00:16	2
2965099	99	27	20,5	cyclictest	3127297	-21	latency_hist	21:45:00	3
2965099	99	26	20,4	cyclictest	3001523	-21	base64	19:45:00	3
2965095	99	26	22,3	cyclictest	3027018	-21	kworker/u8:3+flush-259:0	20:10:01	2
2965089	99	26	23,2	cyclictest	3153734	-21	kworker/u8:0+flush-259:0	22:45:01	0
2965095	99	25	20,3	cyclictest	3267509	-21	kworker/u8:0+flush-259:0	00:05:17	2
2965093	99	25	19,4	cyclictest	3011753	-21	latency_hist	19:55:01	1
2965089	99	25	22,2	cyclictest	3089838	-21	kworker/u8:2+events_unbound	21:30:23	0
2965095	99	24	19,3	cyclictest	3011984	-21	kworker/u8:0+events_unbound	20:40:18	2
2965089	99	24	20,3	cyclictest	3241197	-21	kworker/u8:2+flush-259:0	00:30:28	0
2965089	99	24	19,4	cyclictest	2985605	-21	kworker/u8:3+events_unbound	19:50:15	0
2965089	99	24	18,5	cyclictest	2698871	-21	systemd-journal	20:00:00	0
2965099	99	23	17,5	cyclictest	3047858	-21	apt-get	20:26:35	3
2965095	99	23	19,3	cyclictest	3163805	-21	kworker/u8:3+events_unbound	22:25:18	2
2965095	99	23	18,4	cyclictest	3079049	-21	apt-get	21:00:02	2
2965095	99	22	18,3	cyclictest	2960174	-21	kworker/u8:3+flush-259:0	19:10:00	2
2965093	99	22	16,4	cyclictest	3241548	-21	latency_hist	23:35:00	1
2965089	99	22	18,3	cyclictest	3047056	-21	kworker/u8:3+flush-259:0	20:30:20	0
2965089	99	22	17,4	cyclictest	3042581	-21	apt-get	20:25:00	0
2965089	99	22	14,5	cyclictest	3100377	-21	cat	21:20:00	0
2965095	99	21	17,3	cyclictest	3231265	-21	idleruntime-cro	23:25:01	2
2965093	99	21	18,2	cyclictest	0	-21	swapper/1	21:10:00	1
2965093	99	21	17,3	cyclictest	2698871	-21	systemd-journal	22:41:16	1
2965089	99	21	18,2	cyclictest	3143404	-21	kworker/u8:1+events_unbound	22:00:24	0
2965089	99	21	17,3	cyclictest	3225789	-21	kworker/u8:4+events_unbound	23:45:20	0
2965089	99	21	17,3	cyclictest	3169194	-21	kworker/u8:4+events_unbound	22:25:28	0
2965089	99	21	17,3	cyclictest	3058504	-21	kworker/u8:1+flush-259:0	20:45:11	0
2965089	99	21	16,4	cyclictest	3241197	-21	kworker/u8:2+flush-259:0	00:25:21	0
2965095	99	20	13,5	cyclictest	3143171	-21	awk	22:00:00	2
2965095	99	20	13,5	cyclictest	3012172	-21	diskstats	19:55:13	2
2965093	99	20	18,1	cyclictest	0	-21	swapper/1	23:00:00	1
2965093	99	20	16,3	cyclictest	3137789	-21	latency_hist	21:55:01	1
2965093	99	20	15,4	cyclictest	2989834	-21	ntpq	19:30:21	1
2965089	99	20	17,2	cyclictest	3089838	-21	kworker/u8:2+flush-259:0	22:05:16	0
2965089	99	20	16,3	cyclictest	2985605	-21	kworker/u8:3+flush-259:0	19:45:15	0
2965089	99	20	16,3	cyclictest	2970417	-21	kworker/u8:1+flush-259:0	20:15:16	0
2965089	99	20	16,3	cyclictest	2970417	-21	kworker/u8:1+flush-259:0	19:19:59	0
2965089	99	20	16,3	cyclictest	2970417	-21	kworker/u8:1+events_unbound	19:35:19	0
2965089	99	20	15,4	cyclictest	3058504	-21	kworker/u8:1+events_unbound	21:00:19	0
2965099	99	19	16,2	cyclictest	3225789	-21	kworker/u8:4+events_unbound	00:10:00	3
2965099	99	19	15,3	cyclictest	2969261	-21	ntp_kernel_err	19:10:21	3
2965099	99	19	14,4	cyclictest	2698871	-21	systemd-journal	00:05:00	3
2965095	99	19	16,2	cyclictest	2970417	-21	kworker/u8:1+flush-259:0	19:20:24	2
2965095	99	19	16,2	cyclictest	2970417	-21	kworker/u8:1+events_unbound	19:50:00	2
2965095	99	19	14,4	cyclictest	3148566	-21	/usr/sbin/munin	22:05:22	2
2965095	99	19	13,4	cyclictest	3267264	-21	latency_hist	00:00:00	2
2965089	99	19	16,2	cyclictest	3303557	-21	apt-get	00:35:12	0
2965089	99	19	16,2	cyclictest	3210454	-21	kworker/u8:2+events_unbound	23:05:15	0
2965089	99	19	16,2	cyclictest	2965737	-21	irqcore	19:10:17	0
2965089	99	19	15,3	cyclictest	3084166	-21	kworker/u8:0+events_unbound	21:20:19	0
2965089	99	19	15,3	cyclictest	3006609	-21	kworker/u8:2+flush-259:0	20:05:14	0
2965089	99	19	15,2	cyclictest	0	-21	swapper/0	21:55:00	0
2965099	99	18	13,3	cyclictest	2975329	-21	latency_hist	19:20:00	3
2965099	99	18	12,4	cyclictest	2698871	-21	systemd-journal	23:05:00	3
2965095	99	18	14,3	cyclictest	3241197	-21	kworker/u8:2+flush-259:0	00:20:00	2
2965095	99	18	14,3	cyclictest	3006609	-21	kworker/u8:2+flush-259:0	20:00:25	2
2965095	99	18	13,4	cyclictest	3241197	-21	kworker/u8:2+flush-259:0	00:20:15	2
2965093	99	18	14,3	cyclictest	3153734	-21	kworker/u8:0+flush-259:0	22:30:00	1
2965093	99	18	13,4	cyclictest	3288143	-21	apt-get	00:20:10	1
2965093	99	18	13,3	cyclictest	3272672	-21	/usr/sbin/munin	00:05:19	1
2965093	99	18	11,5	cyclictest	3131575	-21	ntpq	21:45:21	1
2965089	99	18	15,2	cyclictest	3058504	-21	kworker/u8:1+events_unbound	20:56:42	0
2965089	99	18	14,3	cyclictest	3178996	-21	kworker/u8:1+events_unbound	22:51:19	0
2965089	99	18	14,3	cyclictest	3116175	-21	kworker/u8:0+events_unbound	21:55:24	0
2965089	99	18	14,3	cyclictest	3037486	-21	kworker/u8:2+flush-259:0	20:25:00	0
2965089	99	18	14,3	cyclictest	2970417	-21	kworker/u8:1+events_unbound	19:30:14	0
2965089	99	18	13,3	cyclictest	0	-21	swapper/0	22:25:00	0
2965099	99	17	13,3	cyclictest	3089838	-21	kworker/u8:2+flush-259:0	22:09:59	3
2965093	99	17	12,3	cyclictest	2698871	-21	systemd-journal	22:46:40	1
2965093	99	17	11,4	cyclictest	3220948	-21	latency_hist	23:15:00	1
2965093	99	17	11,4	cyclictest	2995862	-21	latency_hist	19:40:00	1
2965089	99	17	9,5	cyclictest	2698871	-21	systemd-journal	22:15:00	0
2965089	99	17	14,2	cyclictest	3178996	-21	kworker/u8:1+events_unbound	22:40:25	0
2965089	99	17	14,2	cyclictest	3132429	-21	cron	21:49:59	0
2965089	99	17	13,3	cyclictest	3267509	-21	kworker/u8:0+events_unbound	00:00:23	0
2965089	99	17	13,3	cyclictest	3215679	-21	kworker/u8:0+events_unbound	23:10:20	0
2965089	99	17	1,1	cyclictest	0	-21	swapper/0	20:52:04	0
2965089	99	17	10,5	cyclictest	3126371	-21	ntpq	21:40:19	0
2965099	99	16	13,2	cyclictest	0	-21	swapper/3	23:50:00	3
2965099	99	16	11,3	cyclictest	3231275	-21	latency_hist	23:25:01	3
2965095	99	16	1,1	cyclictest	0	-21	swapper/2	20:15:00	2
2965093	99	16	13,2	cyclictest	3006609	-21	kworker/u8:2+flush-259:0	20:00:18	1
2965093	99	16	13,2	cyclictest	3000083	-21	ntp_kernel_err	19:40:20	1
2965093	99	16	13,2	cyclictest	3000083	-21	ntp_kernel_err	19:40:20	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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