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 Aug 16, 2026 00:44:04)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2596732	99	47	41,4	cyclictest	2810259	-21	/usr/sbin/munin	22:35:17	3
2596732	99	47	41,4	cyclictest	2653801	-21	latency_hist	20:05:00	3
2596732	99	47	40,5	cyclictest	2628034	-21	latency_hist	19:40:01	3
2596732	99	46	40,4	cyclictest	335557	-21	systemd-journal	21:25:00	3
2596728	99	45	40,3	cyclictest	2879187	-21	apt-get	23:40:14	2
2596728	99	44	40,3	cyclictest	2825968	-21	kworker/u8:3+events_unbound	23:15:00	2
2596722	99	41	35,4	cyclictest	2601827	-21	latency_hist	19:15:02	0
2596726	99	40	34,4	cyclictest	335557	-21	systemd-journal	20:05:21	1
2596722	99	39	35,3	cyclictest	2884061	-21	apt-get	23:45:03	0
2596722	99	39	33,4	cyclictest	2836251	-21	latency_hist	23:00:01	0
2596726	99	38	34,3	cyclictest	2841861	-21	kworker/u8:0+flush-259:0	23:30:01	1
2596722	99	38	31,5	cyclictest	2778871	-21	cp	22:05:02	0
2596728	99	37	32,3	cyclictest	2731721	-21	latency_hist	21:20:01	2
2596722	99	36	32,3	cyclictest	2873982	-21	kworker/u8:1+flush-259:0	23:35:16	0
2596722	99	35	29,4	cyclictest	2915688	-21	cp	00:15:01	0
2596728	99	34	31,2	cyclictest	2627835	-21	kworker/u8:2+flush-259:0	20:35:19	2
2596722	99	34	31,2	cyclictest	2789215	-21	apt-get	22:15:12	0
2596722	99	34	28,4	cyclictest	2699714	-21	ntpq	20:45:23	0
2596726	99	33	27,4	cyclictest	2726561	-21	latency_hist	21:15:01	1
2596722	99	33	30,2	cyclictest	2931480	-21	kworker/u8:3+flush-259:0	00:35:00	0
2596722	99	33	27,4	cyclictest	2721369	-21	latency_hist	21:10:00	0
2596732	99	32	25,5	cyclictest	2778751	-21	cat	22:05:01	3
2596728	99	32	29,2	cyclictest	2873982	-21	kworker/u8:1+flush-259:0	00:00:01	2
2596728	99	32	27,4	cyclictest	2863137	-21	base64	23:25:00	2
2596728	99	32	25,5	cyclictest	2804564	-21	cp	22:30:00	2
2596728	99	32	25,5	cyclictest	2632321	-21	ntpq	19:40:23	2
2596726	99	32	26,4	cyclictest	335557	-21	systemd-journal	19:14:41	1
2596728	99	31	28,2	cyclictest	2700678	-21	kworker/u8:1+flush-259:0	21:05:01	2
2596722	99	31	27,3	cyclictest	2627835	-21	kworker/u8:2+flush-259:0	20:45:00	0
2596722	99	31	25,4	cyclictest	2777326	-21	ntpq	22:00:24	0
2596728	99	30	26,3	cyclictest	2894810	-21	kworker/u8:0+flush-259:0	00:15:26	2
2596728	99	30	26,3	cyclictest	2716394	-21	kworker/u8:4+flush-259:0	21:25:00	2
2596728	99	30	26,2	cyclictest	2778901	-21	/usr/sbin/munin	22:05:23	2
2596726	99	30	24,4	cyclictest	2695487	-21	latency_hist	20:45:00	1
2596726	99	30	23,5	cyclictest	335557	-21	systemd-journal	21:55:01	1
2596722	99	30	26,3	cyclictest	2804488	-21	gpgv	22:29:59	0
2596732	99	29	25,3	cyclictest	2757812	-21	kworker/u8:1+flush-259:0	21:45:25	3
2596732	99	29	22,5	cyclictest	2904079	-21	kworker/u8:3+flush-259:0	00:20:01	3
2596728	99	29	25,3	cyclictest	2915504	-21	apt-get	00:15:01	2
2596728	99	29	25,3	cyclictest	2894810	-21	kworker/u8:0+flush-259:0	00:35:17	2
2596728	99	29	23,4	cyclictest	2627190	-21	ntpq	19:35:23	2
2596728	99	28	25,2	cyclictest	2633201	-21	kworker/u8:0+events_unbound	19:45:18	2
2596722	99	28	24,3	cyclictest	2627835	-21	kworker/u8:2+events_unbound	21:55:22	0
2596728	99	27	24,2	cyclictest	2810244	-21	kworker/u8:2+events_unbound	22:50:19	2
2596722	99	27	24,2	cyclictest	2627835	-21	kworker/u8:2+flush-259:0	21:15:01	0
2596732	99	26	20,4	cyclictest	2910590	-21	/usr/sbin/munin	00:10:18	3
2596728	99	26	23,2	cyclictest	2690331	-21	kworker/u8:3+events_unbound	21:38:04	2
2596722	99	26	23,2	cyclictest	2841861	-21	kworker/u8:0+flush-259:0	23:25:00	0
2596732	99	25	21,3	cyclictest	2700678	-21	kworker/u8:1+events_unbound	21:00:00	3
2596728	99	25	23,1	cyclictest	2810244	-21	kworker/u8:2+events_unbound	22:47:03	2
2596728	99	25	21,3	cyclictest	2627835	-21	kworker/u8:2+flush-259:0	22:20:16	2
2596728	99	25	21,3	cyclictest	2627835	-21	kworker/u8:2+flush-259:0	20:55:23	2
2596728	99	25	21,3	cyclictest	2627835	-21	kworker/u8:2+flush-259:0	20:05:15	2
2596726	99	25	22,2	cyclictest	2617433	-21	kworker/u8:1+flush-259:0	19:30:18	1
2596726	99	25	20,3	cyclictest	2648689	-21	latency_hist	20:00:00	1
2596726	99	25	19,4	cyclictest	2836940	-21	apt-get	23:00:09	1
2596726	99	25	13,3	cyclictest	2836255	-21	apt-get	22:59:59	1
2596722	99	25	19,4	cyclictest	2831128	-21	latency_hist	22:55:00	0
2596732	99	24	20,3	cyclictest	335557	-21	systemd-journal	00:01:22	3
2596732	99	24	20,3	cyclictest	2894810	-21	kworker/u8:0+flush-259:0	00:25:22	3
2596732	99	24	16,6	cyclictest	2862541	-21	latency_hist	23:25:01	3
2596728	99	24	20,3	cyclictest	2627835	-21	kworker/u8:2+events_unbound	21:29:59	2
2596728	99	24	20,3	cyclictest	2617433	-21	kworker/u8:1+flush-259:0	19:30:02	2
2596728	99	24	18,4	cyclictest	335557	-21	systemd-journal	23:47:10	2
2596726	99	24	17,5	cyclictest	335557	-21	systemd-journal	20:15:45	1
2596722	99	24	21,2	cyclictest	2591529	-21	kworker/u8:3+events_unbound	19:35:23	0
2596732	99	23	20,2	cyclictest	2633201	-21	kworker/u8:0+flush-259:0	19:55:20	3
2596732	99	23	19,3	cyclictest	2894810	-21	kworker/u8:0+events_unbound	00:25:00	3
2596732	99	23	19,3	cyclictest	2627835	-21	kworker/u8:2+events_unbound	22:15:23	3
2596732	99	23	18,3	cyclictest	2752666	-21	apt-get	21:40:10	3
2596728	99	23	20,2	cyclictest	2841861	-21	kworker/u8:0+events_unbound	23:20:23	2
2596728	99	23	20,2	cyclictest	2690331	-21	kworker/u8:3+flush-259:0	20:50:19	2
2596728	99	23	17,4	cyclictest	2788082	-21	ntpq	22:10:22	2
2596726	99	23	17,4	cyclictest	2815191	-21	apt-get	22:40:00	1
2596726	99	23	17,4	cyclictest	2700636	-21	latency_hist	20:50:01	1
2596726	99	23	16,4	cyclictest	335557	-21	systemd-journal	19:22:40	1
2596722	99	23	19,3	cyclictest	2894810	-21	kworker/u8:0+events_unbound	00:25:22	0
2596722	99	23	19,3	cyclictest	2810244	-21	kworker/u8:2+events_unbound	23:04:56	0
2596722	99	23	19,3	cyclictest	2654012	-21	kworker/u8:1+events_unbound	20:28:47	0
2596722	99	23	18,4	cyclictest	2810244	-21	kworker/u8:2+flush-259:0	22:45:28	0
2596722	99	23	17,4	cyclictest	2621994	-21	ntpq	19:30:22	0
2596732	99	22	18,3	cyclictest	2690331	-21	kworker/u8:3+events_unbound	21:30:15	3
2596732	99	22	16,4	cyclictest	2799502	-21	/usr/sbin/munin	22:25:23	3
2596728	99	22	19,2	cyclictest	2627835	-21	kworker/u8:2+events_unbound	20:45:21	2
2596728	99	22	18,3	cyclictest	2757812	-21	kworker/u8:1+flush-259:0	21:45:19	2
2596728	99	22	18,3	cyclictest	2690331	-21	kworker/u8:3+flush-259:0	21:10:25	2
2596726	99	22	18,3	cyclictest	2752424	-21	kworker/u8:0+flush-259:0	22:35:00	1
2596726	99	22	15,4	cyclictest	2742096	-21	latency_hist	21:30:01	1
2596726	99	22	14,6	cyclictest	335557	-21	systemd-journal	23:45:01	1
2596722	99	22	20,1	cyclictest	2617433	-21	kworker/u8:1+events_unbound	19:40:20	0
2596722	99	22	18,3	cyclictest	2633201	-21	kworker/u8:0+flush-259:0	19:50:21	0
2596722	99	22	17,4	cyclictest	2941847	-21	latency_hist	00:40:00	0
2596722	99	22	16,4	cyclictest	2857413	-21	latency_hist	23:20:01	0
2596722	99	22	15,5	cyclictest	2596642	-21	latency_hist	19:10:01	0
2596732	99	21	18,2	cyclictest	0	-21	swapper/3	21:15:00	3
2596732	99	21	17,3	cyclictest	2894810	-21	kworker/u8:0+events_unbound	00:35:22	3
2596732	99	21	17,3	cyclictest	2894810	-21	kworker/u8:0+events_unbound	00:30:25	3
2596732	99	21	17,3	cyclictest	2591529	-21	kworker/u8:3+flush-259:0	19:15:00	3
2596728	99	21	18,2	cyclictest	2627835	-21	kworker/u8:2+flush-259:0	20:40:20	2
2596728	99	21	17,3	cyclictest	2757812	-21	kworker/u8:1+flush-259:0	21:55:00	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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