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 Sep 17, 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
2987370	99	36	31,3	cyclictest	3101986	-21	gpgv	09:00:00	3
2987363	99	36	30,4	cyclictest	3170083	-21	latency_hist	10:05:01	2
2987370	99	33	30,2	cyclictest	3185761	-21	kworker/u8:4+flush-259:0	10:35:19	3
2987370	99	31	28,2	cyclictest	3236997	-21	kworker/u8:3+flush-259:0	11:50:19	3
2987363	99	31	26,3	cyclictest	3117786	-21	latency_hist	09:15:01	2
2987354	99	31	25,5	cyclictest	2987091	-21	latency_hist	07:10:01	0
2987358	99	30	26,3	cyclictest	3226929	-21	kworker/u8:2+flush-259:0	11:25:00	1
2987354	99	30	25,4	cyclictest	2987098	-21	apt-get	07:10:02	0
2987358	99	29	25,3	cyclictest	3236997	-21	kworker/u8:3+flush-259:0	11:15:26	1
2987358	99	29	23,5	cyclictest	3086200	-21	apt-get	08:42:55	1
2987370	99	28	25,2	cyclictest	3216423	-21	kworker/u8:1+flush-259:0	11:00:25	3
2987370	99	28	24,3	cyclictest	3293972	-21	kworker/u8:3+flush-259:0	12:25:00	3
2987370	99	28	23,3	cyclictest	3247493	-21	/usr/sbin/munin	11:20:14	3
2987358	99	28	23,3	cyclictest	3159406	-21	kworker/u8:1+flush-259:0	10:05:19	1
2987354	99	28	24,3	cyclictest	3262718	-21	kworker/u8:0+flush-259:0	12:30:25	0
2987370	99	26	21,4	cyclictest	3055021	-21	latency_hist	08:15:01	3
2987370	99	26	20,4	cyclictest	3190686	-21	latency_hist	10:25:01	3
2987354	99	26	23,2	cyclictest	3273000	-21	kworker/u8:1+flush-259:0	11:45:22	0
2987354	99	26	20,5	cyclictest	3189835	-21	ntpq	10:20:24	0
2987358	99	25	18,5	cyclictest	2698871	-21	systemd-journal	10:15:00	1
2987354	99	25	18,6	cyclictest	3106589	-21	ntpq	09:00:24	0
2987354	99	25	18,5	cyclictest	3158927	-21	ntpq	09:50:23	0
2987354	99	25	18,4	cyclictest	3024262	-21	/usr/sbin/munin	07:45:20	0
2987363	99	24	20,3	cyclictest	3196047	-21	/usr/sbin/munin	10:30:17	2
2987358	99	24	20,3	cyclictest	3236997	-21	kworker/u8:3+flush-259:0	11:45:00	1
2987354	99	24	21,2	cyclictest	3262718	-21	kworker/u8:0+events_unbound	12:10:23	0
2987354	99	24	20,3	cyclictest	3081285	-21	kworker/u8:1+flush-259:0	08:50:17	0
2987370	99	23	19,3	cyclictest	3262718	-21	kworker/u8:0+flush-259:0	12:05:19	3
2987370	99	23	19,3	cyclictest	3262718	-21	kworker/u8:0+flush-259:0	12:05:18	3
2987358	99	23	20,2	cyclictest	3201198	-21	kworker/u8:3+flush-259:0	10:49:56	1
2987358	99	23	17,4	cyclictest	3190930	-21	/usr/sbin/munin	10:25:16	1
2987358	99	23	17,4	cyclictest	3111760	-21	ntpq	09:05:25	1
2987354	99	23	17,4	cyclictest	2987769	-21	kworker/u8:3+events_unbound	08:30:03	0
2987354	99	23	16,5	cyclictest	2698871	-21	systemd-journal	08:36:26	0
2987370	99	22	17,4	cyclictest	2992939	-21	/usr/sbin/munin	07:15:16	3
2987370	99	22	17,4	cyclictest	2992939	-21	/usr/sbin/munin	07:15:15	3
2987370	99	22	15,5	cyclictest	2698871	-21	systemd-journal	09:50:00	3
2987358	99	22	19,2	cyclictest	3070172	-21	kworker/u8:2+flush-259:0	08:35:27	1
2987358	99	22	17,3	cyclictest	3086663	-21	/usr/sbin/munin	08:45:14	1
2987358	99	22	16,4	cyclictest	3029175	-21	awk	07:50:01	1
2987354	99	22	18,2	cyclictest	3117766	-21	cron	09:14:59	0
2987354	99	22	16,4	cyclictest	3278959	-21	diskstats	11:50:17	0
2987370	99	21	17,3	cyclictest	3096724	-21	kworker/u8:2+events_unbound	09:05:27	3
2987370	99	21	17,3	cyclictest	3000063	-21	rs:main		3
2987370	99	21	15,4	cyclictest	3096716	-21	latency_hist	08:54:59	3
2987358	99	21	16,4	cyclictest	2971825	-21	kworker/u8:2+flush-259:0	07:30:28	1
2987354	99	21	18,2	cyclictest	3288788	-21	cron	12:00:00	0
2987354	99	21	17,3	cyclictest	3236997	-21	kworker/u8:3+flush-259:0	11:35:20	0
2987354	99	21	16,3	cyclictest	3236997	-21	kworker/u8:3+events_unbound	11:20:13	0
2987354	99	21	16,3	cyclictest	3060386	-21	kworker/u8:0+events_unbound	08:22:25	0
2987370	99	20	17,2	cyclictest	0	-21	swapper/3	08:30:01	3
2987370	99	20	16,3	cyclictest	2977109	-21	kworker/u8:0+events_unbound	07:20:16	3
2987370	99	20	15,4	cyclictest	3324922	-21	turbostat	12:39:55	3
2987370	99	20	14,4	cyclictest	3102560	-21	apt-get	09:00:14	3
2987363	99	20	17,2	cyclictest	3216423	-21	kworker/u8:1+flush-259:0	11:00:17	2
2987363	99	20	16,3	cyclictest	3236997	-21	kworker/u8:3+flush-259:0	11:35:20	2
2987363	99	20	16,3	cyclictest	3159406	-21	kworker/u8:1+flush-259:0	09:55:24	2
2987363	99	20	16,3	cyclictest	3060146	-21	idleruntime-cro	08:20:01	2
2987358	99	20	14,4	cyclictest	2698871	-21	systemd-journal	09:53:25	1
2987354	99	20	16,3	cyclictest	3273000	-21	kworker/u8:1+flush-259:0	12:00:26	0
2987354	99	20	16,3	cyclictest	3159406	-21	kworker/u8:1+events_unbound	10:25:27	0
2987354	99	20	16,3	cyclictest	3076035	-21	kworker/u8:0+events_unbound	10:00:17	0
2987354	99	20	15,4	cyclictest	3013752	-21	kworker/u8:0+flush-259:0	07:44:31	0
2987354	99	20	15,3	cyclictest	3076035	-21	kworker/u8:0+flush-259:0	10:30:20	0
2987354	99	20	13,5	cyclictest	2698871	-21	systemd-journal	10:19:59	0
2987370	99	19	16,2	cyclictest	3076035	-21	kworker/u8:0+flush-259:0	08:38:55	3
2987370	99	19	15,3	cyclictest	3201198	-21	kworker/u8:3+events_unbound	10:45:21	3
2987370	99	19	15,3	cyclictest	3076035	-21	kworker/u8:0+flush-259:0	09:55:17	3
2987363	99	19	14,4	cyclictest	3048904	-21	ntpq	08:05:20	2
2987358	99	19	16,2	cyclictest	3283252	-21	kworker/u8:2+flush-259:0	11:55:25	1
2987358	99	19	15,3	cyclictest	3262718	-21	kworker/u8:0+flush-259:0	12:05:27	1
2987358	99	19	15,3	cyclictest	3262718	-21	kworker/u8:0+flush-259:0	12:05:26	1
2987358	99	19	14,4	cyclictest	3266986	-21	ntpq	11:35:23	1
2987358	99	19	14,4	cyclictest	2698871	-21	systemd-journal	09:02:26	1
2987354	99	19	15,3	cyclictest	3159406	-21	kworker/u8:1+events_unbound	10:15:00	0
2987354	99	19	15,3	cyclictest	3096724	-21	kworker/u8:2+flush-259:0	09:05:23	0
2987354	99	19	15,3	cyclictest	3081285	-21	kworker/u8:1+flush-259:0	09:20:00	0
2987354	99	19	15,3	cyclictest	3076035	-21	kworker/u8:0+flush-259:0	09:20:22	0
2987354	99	19	13,4	cyclictest	3132714	-21	ntpq	09:25:21	0
2987354	99	19	13,4	cyclictest	3029449	-21	apt-get	07:50:14	0
2987370	99	18	15,2	cyclictest	3252441	-21	kworker/u8:1+events_unbound	11:30:00	3
2987370	99	18	15,2	cyclictest	3159406	-21	kworker/u8:1+events_unbound	10:40:18	3
2987370	99	18	15,2	cyclictest	3076035	-21	kworker/u8:0+flush-259:0	10:30:19	3
2987370	99	18	14,3	cyclictest	3273000	-21	kworker/u8:1+flush-259:0	11:45:20	3
2987370	99	18	14,3	cyclictest	3081285	-21	kworker/u8:1+flush-259:0	09:25:22	3
2987370	99	18	14,3	cyclictest	2971825	-21	kworker/u8:2+flush-259:0	07:30:00	3
2987363	99	18	11,5	cyclictest	3324054	-21	ntpq	12:30:23	2
2987358	99	18	13,4	cyclictest	3096724	-21	kworker/u8:2+events_unbound	08:55:19	1
2987358	99	18	12,4	cyclictest	3283623	-21	latency_hist	11:55:00	1
2987358	99	18	12,4	cyclictest	3143915	-21	apt-get	09:40:00	1
2987354	99	18	14,3	cyclictest	3314831	-21	kworker/u8:4+events_unbound	12:35:27	0
2987354	99	18	14,3	cyclictest	3236997	-21	kworker/u8:3+events_unbound	11:30:18	0
2987354	99	18	14,3	cyclictest	3185761	-21	kworker/u8:4+events_unbound	10:49:27	0
2987354	99	18	14,3	cyclictest	2987769	-21	kworker/u8:3+flush-259:0	07:25:16	0
2987354	99	18	14,2	cyclictest	3170762	-21	irqcore	10:05:17	0
2987354	99	18	13,3	cyclictest	3226702	-21	turbostat	11:00:00	0
2987354	99	18	13,3	cyclictest	2987769	-21	kworker/u8:3+events_unbound	08:15:17	0
2987354	99	18	13,3	cyclictest	0	-21	swapper/0	07:20:00	0
2987354	99	18	13,3	cyclictest	0	-21	swapper/0	07:20:00	0
2987370	99	17	13,3	cyclictest	3262718	-21	kworker/u8:0+flush-259:0	12:10:19	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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