OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Mon Jun 29, 2026 00:44:18)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3551784	2	78	0,3	chrt	0	-21	swapper/2	23:30:32	2
3287229	99	61	55,4	cyclictest	3357920	-21	kworker/u8:0+flush-8:0	22:00:30	0
3287229	99	59	50,6	cyclictest	1704890	-21	systemd-journal	00:30:26	0
3287232	99	54	50,3	cyclictest	3377826	-21	kworker/u8:2+flush-8:0	21:05:31	1
3287232	99	53	48,4	cyclictest	3377826	-21	kworker/u8:2+flush-8:0	22:15:30	1
3287229	99	53	46,5	cyclictest	3377826	-21	kworker/u8:2+events_unbound	21:35:33	0
3287229	99	53	43,7	cyclictest	3312898	-21	ntpq	19:30:26	0
3287232	99	52	48,3	cyclictest	3478410	-21	kworker/u8:1+flush-8:0	22:45:32	1
3287232	99	52	47,4	cyclictest	3308920	-21	kworker/u8:3+flush-8:0	20:15:32	1
3597689	2	51	0,1	chrt	3597690	-21	/usr/sbin/munin	00:20:16	2
3287229	99	50	47,2	cyclictest	3357920	-21	kworker/u8:0+events_unbound	20:35:31	0
3287232	99	48	36,9	cyclictest	3382502	-21	ntpq	20:40:25	1
3287232	99	47	43,3	cyclictest	3319034	-21	kworker/u8:1+flush-8:0	20:35:31	1
3287232	99	46	36,8	cyclictest	1704890	-21	systemd-journal	19:45:27	1
3287232	99	45	35,7	cyclictest	1704890	-21	systemd-journal	21:45:00	1
3287234	99	44	34,8	cyclictest	1704890	-21	systemd-journal	20:40:01	2
3287232	99	44	40,3	cyclictest	2994733	-21	kworker/u8:2+flush-8:0	20:20:30	1
3287232	99	44	38,5	cyclictest	3143449	-21	kworker/u8:4+flush-8:0	19:10:28	1
3287232	99	44	36,6	cyclictest	3377826	-21	kworker/u8:2+flush-8:0	21:10:28	1
3287229	99	44	40,3	cyclictest	3319034	-21	kworker/u8:1+events_unbound	20:12:28	0
3292501	2	43	0,3	chrt	20	1	rcuc/0	19:15:02	0
3287234	99	43	8,18	cyclictest	3508180	-21	apt-get	22:50:14	2
3287232	99	43	39,3	cyclictest	3601852	-21	kworker/u8:2+events_unbound	00:25:32	1
3287232	99	43	39,3	cyclictest	3357920	-21	kworker/u8:0+flush-8:0	00:10:26	1
3287232	99	42	38,3	cyclictest	3357920	-21	kworker/u8:0+flush-8:0	22:40:31	1
3287232	99	42	35,5	cyclictest	3433052	-21	latency_hist	21:35:00	1
3287229	99	42	33,6	cyclictest	3442994	-21	latency_hist	21:45:00	0
3287232	99	41	32,6	cyclictest	1704890	-21	systemd-journal	19:58:25	1
3287232	99	40	36,3	cyclictest	3377826	-21	kworker/u8:2+flush-8:0	22:30:31	1
3287232	99	40	28,9	cyclictest	3457090	-21	ntpq	21:55:25	1
3287229	99	40	36,3	cyclictest	3377826	-21	kworker/u8:2+events_unbound	21:22:54	0
3287232	99	39	31,5	cyclictest	1704890	-21	systemd-journal	19:35:26	1
3287232	99	39	31,5	cyclictest	1704890	-21	systemd-journal	19:35:25	1
3287229	99	39	35,3	cyclictest	3357920	-21	kworker/u8:0+events_unbound	20:34:29	0
3287232	99	38	33,4	cyclictest	3388044	-21	kworker/u8:1+flush-8:0	20:55:32	1
3287232	99	38	32,4	cyclictest	2994733	-21	kworker/u8:2+events_unbound	20:05:31	1
3287232	99	38	26,9	cyclictest	1704890	-21	systemd-journal	21:39:27	1
3287229	99	38	34,3	cyclictest	3388044	-21	kworker/u8:1+events_unbound	20:49:27	0
3287229	99	38	30,6	cyclictest	3552419	-21	latency_hist	23:35:00	0
3287229	99	38	28,7	cyclictest	3337920	-21	ntpq	19:55:26	0
3287232	99	37	32,4	cyclictest	3478410	-21	kworker/u8:1+flush-8:0	23:45:28	1
3287232	99	37	31,4	cyclictest	3552644	-21	kworker/u8:3+flush-8:0	00:00:26	1
3287229	99	37	31,4	cyclictest	1704890	-21	systemd-journal	22:08:01	0
3287229	99	37	31,4	cyclictest	1704890	-21	systemd-journal	22:08:01	0
3287229	99	37	27,7	cyclictest	3302983	-21	ntpq	19:20:24	0
3388954	2	36	0,3	sleep3	47	1	rcuc/3	20:50:17	3
3287229	99	36	32,3	cyclictest	3478410	-21	kworker/u8:1+events_unbound	22:54:39	0
3287232	99	35	30,4	cyclictest	2994733	-21	kworker/u8:2+events_unbound	19:25:20	1
3287232	99	35	28,5	cyclictest	3602203	-21	latency_hist	00:25:01	1
3287232	99	35	28,5	cyclictest	3319034	-21	kworker/u8:1+flush-8:0	20:10:28	1
3287232	99	35	27,6	cyclictest	1704890	-21	systemd-journal	21:05:01	1
3287229	99	35	32,2	cyclictest	3493212	-21	kworker/u8:3+events_unbound	22:44:38	0
3287229	99	35	31,3	cyclictest	3357920	-21	kworker/u8:0+events_unbound	22:48:12	0
3287232	99	34	28,4	cyclictest	3517792	-21	latency_hist	23:00:00	1
3287232	99	34	27,5	cyclictest	1704890	-21	systemd-journal	22:05:28	1
3287232	99	34	27,5	cyclictest	1704890	-21	systemd-journal	22:05:28	1
3287232	99	34	25,7	cyclictest	3294235	-21	/usr/sbin/munin	19:15:25	1
3287229	99	34	31,2	cyclictest	3522388	-21	kworker/u8:2+events_unbound	23:11:27	0
3287229	99	34	30,3	cyclictest	3552644	-21	kworker/u8:3+events_unbound	00:23:33	0
3287229	99	34	29,3	cyclictest	3587716	-21	fschecks_time	00:10:17	0
3287229	99	34	27,5	cyclictest	3379499	-21	irqrtprio	20:40:21	0
3287229	99	34	19,2	cyclictest	16	1	rcu_preempt	00:35:34	0
3287234	99	33	22,8	cyclictest	3577190	-21	awk	00:00:00	2
3287234	99	33	10,6	cyclictest	3357730	-21	ntpq	20:15:27	2
3287232	99	33	26,5	cyclictest	3597027	-21	http	00:20:01	1
3287232	99	33	26,5	cyclictest	3597027	-21	http	00:20:01	1
3287232	99	33	26,5	cyclictest	3368825	-21	apt-get	20:30:13	1
3287229	99	33	30,2	cyclictest	3377826	-21	kworker/u8:2+events_unbound	21:14:39	0
3287229	99	33	30,2	cyclictest	3319034	-21	kworker/u8:1+events_unbound	19:47:34	0
3287229	99	33	30,2	cyclictest	2994733	-21	kworker/u8:2+events_unbound	19:14:11	0
3287229	99	33	29,3	cyclictest	3552644	-21	kworker/u8:3+events_unbound	00:02:14	0
3287229	99	33	29,3	cyclictest	3388044	-21	kworker/u8:1+events_unbound	20:55:56	0
3287229	99	33	29,3	cyclictest	3357920	-21	kworker/u8:0+events_unbound	22:28:39	0
3287229	99	33	29,3	cyclictest	3357920	-21	kworker/u8:0+events_unbound	21:48:05	0
3287234	99	32	9,11	cyclictest	3453764	-21	perl	21:55:17	2
3287234	99	32	8,12	cyclictest	3392452	-21	ntpq	20:50:26	2
3287232	99	32	28,3	cyclictest	3388044	-21	kworker/u8:1+events_unbound	20:50:30	1
3287232	99	32	28,3	cyclictest	3294854	-21	kworker/u8:0+events_unbound	19:20:27	1
3287232	99	32	28,3	cyclictest	2994733	-21	kworker/u8:2+flush-8:0	19:40:37	1
3287232	99	32	21,8	cyclictest	1704890	-21	systemd-journal	23:50:25	1
3287229	99	32	29,2	cyclictest	3522388	-21	kworker/u8:2+events_unbound	23:19:31	0
3287229	99	32	29,2	cyclictest	3478410	-21	kworker/u8:1+events_unbound	23:53:10	0
3287229	99	32	29,2	cyclictest	3478410	-21	kworker/u8:1+events_unbound	23:44:59	0
3287229	99	32	29,2	cyclictest	3478410	-21	kworker/u8:1+events_unbound	00:07:51	0
3287229	99	32	29,2	cyclictest	3478410	-21	kworker/u8:1+events_unbound	00:07:50	0
3287229	99	32	29,2	cyclictest	3357920	-21	kworker/u8:0+events_unbound	22:17:36	0
3287229	99	32	29,2	cyclictest	3357920	-21	kworker/u8:0+events_unbound	21:30:51	0
3287229	99	32	29,2	cyclictest	3357920	-21	kworker/u8:0+events_unbound	20:51:35	0
3287229	99	32	28,3	cyclictest	3377826	-21	kworker/u8:2+events_unbound	22:31:36	0
3287229	99	32	28,3	cyclictest	3367830	-21	kworker/u8:3+events_unbound	20:29:16	0
3287229	99	32	28,3	cyclictest	3357920	-21	kworker/u8:0+events_unbound	00:28:15	0
3287229	99	32	28,3	cyclictest	3308920	-21	kworker/u8:3+events_unbound	19:37:24	0
3287229	99	32	28,3	cyclictest	3308920	-21	kworker/u8:3+events_unbound	19:37:24	0
3287229	99	32	26,4	cyclictest	3358232	-21	unixbench_multi	20:15:35	0
3287229	99	32	25,5	cyclictest	1712307	-21	ntpd	21:50:29	0
3287229	99	32	25,2	cyclictest	3478410	-21	kworker/u8:1+events_unbound	23:24:01	0
3287229	99	32	23,2	cyclictest	16	1	rcu_preempt	20:05:13	0
3287229	99	32	13,5	cyclictest	0	-21	swapper/0	19:40:17	0
3282401	2	32	3,9	sleep1	3282427	-21	apt-get	19:05:12	1
3287234	99	31	26,3	cyclictest	3314201	-21	aten2_r5power_p	19:35:16	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17