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 Mar 04, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3293379	99	37	35,1	cyclictest	3308836	-21	fwupd	19:22:28	1
3293382	99	32	26,4	cyclictest	3424021	-21	gpgv	21:15:00	2
3293382	99	31	29,1	cyclictest	3298959	-21	kworker/u8:4+events_unbound	19:22:28	2
3293376	99	31	27,3	cyclictest	3397853	-21	kworker/u8:0+flush-259:0	20:50:20	0
3293382	99	30	27,2	cyclictest	3293797	-21	kworker/u8:1+flush-259:0	19:35:23	2
3293384	99	29	23,4	cyclictest	3605946	-21	latency_hist	00:10:01	3
3293382	99	29	26,2	cyclictest	3413165	-21	kworker/u8:3+flush-259:0	22:35:23	2
3293379	99	28	24,3	cyclictest	3423907	-21	apt-get	21:15:00	1
3293379	99	28	23,3	cyclictest	3361318	-21	/usr/sbin/munin	20:15:21	1
3293384	99	27	23,3	cyclictest	3564352	-21	kworker/u8:1+flush-259:0	23:55:01	3
3293384	99	26	20,4	cyclictest	3430118	-21	cp	21:20:01	3
3293382	99	25	21,3	cyclictest	3413165	-21	kworker/u8:3+flush-259:0	00:00:24	2
3293382	99	25	17,5	cyclictest	252	-21	systemd-journal	22:30:01	2
3293382	99	24	19,4	cyclictest	3413166	-21	kworker/u8:4+flush-259:0	21:05:24	2
3293382	99	24	18,4	cyclictest	3401916	-21	ntpq	20:50:20	2
3293384	99	23	19,3	cyclictest	3595460	-21	kworker/u8:2+flush-259:0	00:30:24	3
3293384	99	23	16,5	cyclictest	3512911	-21	latency_hist	22:40:00	3
3293382	99	23	19,3	cyclictest	3413165	-21	kworker/u8:3+events_unbound	23:55:13	2
3293382	99	23	17,4	cyclictest	252	-21	systemd-journal	19:50:01	2
3293379	99	23	18,3	cyclictest	3381979	-21	/usr/sbin/munin	20:35:14	1
3293376	99	23	18,3	cyclictest	3366682	-21	diskstats	20:20:12	0
3293382	99	22	18,2	cyclictest	0	-21	swapper/2	00:40:00	2
3293379	99	22	19,2	cyclictest	3413165	-21	kworker/u8:3+events_unbound	00:04:56	1
3293376	99	22	19,2	cyclictest	3460870	-21	kworker/u8:5+flush-259:0	22:10:16	0
3293376	99	22	18,3	cyclictest	3413165	-21	kworker/u8:3+flush-259:0	00:10:22	0
3293376	99	22	17,3	cyclictest	3590714	-21	/usr/sbin/munin	23:55:25	0
3293376	99	22	16,4	cyclictest	3413550	-21	diskstats	21:05:14	0
3293384	99	21	18,2	cyclictest	3293797	-21	kworker/u8:1+events_unbound	19:22:30	3
3293382	99	21	16,3	cyclictest	3340466	-21	kworker/u8:2+flush-259:0	20:05:23	2
3293379	99	21	15,4	cyclictest	252	-21	systemd-journal	20:31:31	1
3293384	99	20	14,5	cyclictest	3314237	-21	latency_hist	19:30:01	3
3293382	99	20	18,1	cyclictest	3413165	-21	kworker/u8:3+events_unbound	23:35:14	2
3293382	99	20	17,2	cyclictest	3350796	-21	kworker/u8:3+events_unbound	20:35:16	2
3293382	99	20	16,3	cyclictest	3350796	-21	kworker/u8:3+flush-259:0	20:20:17	2
3293382	99	20	16,3	cyclictest	3298993	-21	apt-get	19:15:11	2
3293382	99	20	14,4	cyclictest	3626836	-21	apt-get	00:30:11	2
3293382	99	20	14,4	cyclictest	3298724	-21	latency_hist	19:15:01	2
3293379	99	20	17,2	cyclictest	0	-21	swapper/1	21:10:00	1
3293379	99	20	17,2	cyclictest	0	-21	swapper/1	00:35:00	1
3293379	99	20	15,4	cyclictest	3293739	-21	cat	19:10:01	1
3293379	99	20	15,3	cyclictest	252	-21	systemd-journal	22:11:48	1
3293379	99	20	14,4	cyclictest	3616488	-21	/usr/sbin/munin	00:20:19	1
3293376	99	20	17,2	cyclictest	3413165	-21	kworker/u8:3+events_unbound	00:00:17	0
3293384	99	19	16,2	cyclictest	3418330	-21	sh	21:10:00	3
3293384	99	19	15,3	cyclictest	3413165	-21	kworker/u8:3+flush-259:0	22:00:24	3
3293384	99	19	14,4	cyclictest	3600757	-21	latency_hist	00:05:01	3
3293382	99	19	16,2	cyclictest	3513138	-21	kworker/u8:4+events_unbound	22:40:15	2
3293382	99	19	15,3	cyclictest	3413166	-21	kworker/u8:4+flush-259:0	21:25:22	2
3293382	99	19	14,3	cyclictest	3386931	-21	kworker/u8:1+flush-259:0	20:55:17	2
3293382	99	19	13,4	cyclictest	3575440	-21	diskstats	23:40:14	2
3293379	99	19	16,2	cyclictest	3595460	-21	kworker/u8:2+events_unbound	00:35:28	1
3293379	99	19	14,3	cyclictest	3445650	-21	apt-get	21:35:11	1
3293379	99	19	12,5	cyclictest	252	-21	systemd-journal	00:14:31	1
3293376	99	19	15,3	cyclictest	3423934	-21	gpgv	21:15:01	0
3293376	99	19	14,4	cyclictest	252	-21	systemd-journal	22:05:00	0
3293384	99	18	14,3	cyclictest	3544019	-21	apt-get	23:10:10	3
3293384	99	18	13,3	cyclictest	3611125	-21	kworker/u8:0+flush-259:0	00:15:25	3
3293382	99	18	15,2	cyclictest	3413165	-21	kworker/u8:3+flush-259:0	21:55:22	2
3293382	99	18	15,2	cyclictest	3413165	-21	kworker/u8:3+events_unbound	22:16:48	2
3293382	99	18	15,2	cyclictest	3397853	-21	kworker/u8:0+events_unbound	22:20:14	2
3293382	99	18	15,2	cyclictest	3340466	-21	kworker/u8:2+events_unbound	20:25:13	2
3293382	99	18	15,2	cyclictest	3293797	-21	kworker/u8:1+events_unbound	19:40:14	2
3293379	99	18	15,2	cyclictest	3523211	-21	turbostat.cron	22:49:59	1
3293379	99	18	14,3	cyclictest	3402814	-21	grep	20:55:00	1
3293376	99	18	15,2	cyclictest	3529053	-21	irqcore	22:55:16	0
3293376	99	18	12,5	cyclictest	3513332	-21	diskstats	22:40:13	0
3293384	99	17	14,2	cyclictest	3303917	-21	sh	19:20:00	3
3293384	99	17	13,3	cyclictest	3350796	-21	kworker/u8:3+flush-259:0	20:50:00	3
3293384	99	17	13,3	cyclictest	3293797	-21	kworker/u8:1+flush-259:0	20:10:21	3
3293382	99	17	9,6	cyclictest	3392495	-21	latency_hist	20:45:00	2
3293382	99	17	14,2	cyclictest	3413165	-21	kworker/u8:3+flush-259:0	23:30:20	2
3293382	99	17	13,3	cyclictest	3513138	-21	kworker/u8:4+events_unbound	23:15:00	2
3293382	99	17	13,3	cyclictest	3413165	-21	kworker/u8:3+events_unbound	23:15:22	2
3293379	99	17	14,2	cyclictest	3350796	-21	kworker/u8:3+events_unbound	20:27:49	1
3293379	99	17	14,1	cyclictest	0	-21	swapper/1	19:30:01	1
3293379	99	17	12,4	cyclictest	252	-21	systemd-journal	21:20:31	1
3293379	99	17	1,14	cyclictest	509	-21	rs:main		1
3293379	99	17	11,4	cyclictest	3507520	-21	cat	22:35:00	1
3293376	99	17	14,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	21:30:23	0
3293376	99	17	14,2	cyclictest	3605951	-21	sh	00:10:00	0
3293376	99	17	13,3	cyclictest	3397853	-21	kworker/u8:0+flush-259:0	21:20:00	0
3293376	99	17	13,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	19:30:23	0
3293376	99	17	12,4	cyclictest	3595460	-21	kworker/u8:2+flush-259:0	00:30:21	0
3293376	99	17	10,5	cyclictest	3324095	-21	ntpq	19:35:20	0
3293376	99	17	0,15	cyclictest	252	-21	systemd-journal	19:55:01	0
3293384	99	16	9,5	cyclictest	3407953	-21	latency_hist	21:00:00	3
3293384	99	16	14,1	cyclictest	3621407	-21	sh	00:25:01	3
3293384	99	16	13,2	cyclictest	3298959	-21	kworker/u8:4+events_unbound	19:45:22	3
3293384	99	16	12,3	cyclictest	3413165	-21	kworker/u8:3+flush-259:0	23:20:29	3
3293384	99	16	12,3	cyclictest	3350796	-21	kworker/u8:3+flush-259:0	20:40:20	3
3293384	99	16	12,3	cyclictest	3298959	-21	kworker/u8:4+flush-259:0	19:40:23	3
3293384	99	16	10,4	cyclictest	252	-21	systemd-journal	22:32:30	3
3293382	99	16	13,2	cyclictest	3623977	-21	kthreadcore	00:25:18	2
3293382	99	16	13,2	cyclictest	3335973	-21	sed	19:50:16	2
3293382	99	16	12,3	cyclictest	3413165	-21	kworker/u8:3+events_unbound	23:25:15	2
3293382	99	16	12,3	cyclictest	3350796	-21	kworker/u8:3+events_unbound	20:45:15	2
3293382	99	16	12,3	cyclictest	2570056	-21	kworker/u8:3+flush-259:0	19:25:23	2
3293379	99	16	2,4	cyclictest	32	-21	ksoftirqd/1	22:15:19	1
3293379	99	16	13,2	cyclictest	3413165	-21	kworker/u8:3+events_unbound	23:57:11	1
3293379	99	16	13,2	cyclictest	3391632	-21	ntp_kernel_pll_	20:40:21	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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