OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #7, slot #2

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 rack7slot2.osadl.org (updated Fri Feb 20, 2026 12:44:12)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3371558	99	97	82,13	cyclictest	3382872	-21	kworker/u4:5+events_unbound	10:00:01	0
3371558	99	96	87,6	cyclictest	3485235	-21	kworker/u4:10+events_unbound	10:54:42	0
3371559	99	94	87,5	cyclictest	3434719	-21	kworker/u4:11+events_unbound	09:59:36	1
3371559	99	91	83,6	cyclictest	3565217	-21	kworker/u4:12+events_unbound	12:30:02	1
3371558	99	91	81,7	cyclictest	3519502	-21	kworker/u4:14+events_unbound	11:34:53	0
3371558	99	84	76,5	cyclictest	3426065	-21	kworker/u4:4+events_unbound	10:24:40	0
3371559	99	83	72,7	cyclictest	3379075	-21	kworker/u4:5+events_unbound	07:45:00	1
3371558	99	83	63,15	cyclictest	3393264	-21	apt-get	08:35:11	0
3371559	99	79	71,6	cyclictest	3498095	-21	kworker/u4:0+events_unbound	11:10:00	1
3371559	99	79	71,6	cyclictest	3498095	-21	kworker/u4:0+events_unbound	11:10:00	1
3371559	99	76	72,2	cyclictest	3498099	-21	kworker/u4:6+events_unbound	11:04:45	1
3371558	99	76	68,6	cyclictest	3413040	-21	kworker/u4:9+events_unbound	09:39:32	0
3371558	99	74	67,5	cyclictest	3518887	-21	kworker/u4:13+events_unbound	11:29:54	0
3371559	99	73	64,7	cyclictest	3477287	-21	kworker/u4:2+events_unbound	10:38:23	1
3371559	99	72	59,5	cyclictest	3501781	-21	kworker/u4:7+events_unbound	12:20:00	1
3371559	99	72	59,5	cyclictest	3501781	-21	kworker/u4:7+events_unbound	12:19:59	1
3371558	99	70	63,5	cyclictest	3544478	-21	kworker/u4:4+events_unbound	12:15:01	0
3371559	99	69	61,6	cyclictest	3535940	-21	kworker/u4:8+events_unbound	11:49:56	1
3371558	99	68	59,7	cyclictest	3477287	-21	kworker/u4:2+events_unbound	10:39:41	0
3371559	99	65	48,6	cyclictest	3455726	-21	kworker/u4:1+events_unbound	10:34:41	1
3371558	99	65	55,7	cyclictest	3398358	-21	kworker/u4:8+events_unbound	09:10:01	0
3371558	99	65	51,6	cyclictest	3426063	-21	kworker/u4:3+events_unbound	09:44:34	0
3371559	99	64	48,7	cyclictest	3468746	-21	kworker/u4:6+events_unbound	10:44:40	1
3371558	99	64	45,17	cyclictest	3434103	-21	kworker/u4:7+events_unbound	09:55:00	0
3371559	99	63	55,6	cyclictest	3375311	-21	kworker/u4:1+events_unbound	07:34:12	1
3371558	99	62	54,6	cyclictest	3477287	-21	kworker/u4:2+events_unbound	10:40:04	0
3371558	99	61	53,5	cyclictest	3393231	-21	kworker/u4:17+events_unbound	09:50:01	0
3371558	99	60	52,6	cyclictest	3455728	-21	kworker/u4:6+events_unbound	10:19:40	0
3371559	99	59	52,5	cyclictest	3485235	-21	kworker/u4:10+events_unbound	11:39:54	1
3371558	99	59	50,6	cyclictest	3453611	-21	apt-get	10:10:13	0
3371559	99	58	52,4	cyclictest	3372759	-21	kworker/u4:6+events_unbound	07:20:00	1
3371559	99	58	49,7	cyclictest	3398358	-21	kworker/u4:8+events_unbound	09:09:28	1
3371559	99	58	49,6	cyclictest	3381614	-21	kworker/u4:7+events_unbound	08:04:19	1
3371559	99	58	49,6	cyclictest	3371484	-21	kworker/u4:4+events_unbound	07:24:13	1
3371559	99	58	48,8	cyclictest	3317334	-21	kworker/u4:12+events_unbound	07:54:15	1
3371558	99	58	49,7	cyclictest	3382872	-21	kworker/u4:5+events_unbound	09:04:28	0
3371559	99	57	49,6	cyclictest	0	-21	swapper/1	11:55:28	1
3371558	99	57	49,6	cyclictest	3526443	-21	ssh	11:35:35	0
3371558	99	57	48,7	cyclictest	3402146	-21	kworker/u4:0+events_unbound	09:19:29	0
3371559	99	56	47,6	cyclictest	3393231	-21	kworker/u4:17+events_unbound	08:59:28	1
3371558	99	55	47,6	cyclictest	388	-21	dbus-daemon	11:24:51	0
3371558	99	55	46,5	cyclictest	0	-21	swapper/0	11:05:26	0
3371558	99	55	46,5	cyclictest	0	-21	swapper/0	11:05:26	0
3371559	99	54	44,7	cyclictest	3400899	-21	systemd	09:04:27	1
3371558	99	54	45,6	cyclictest	3399591	-21	unixbench_singl	08:55:36	0
3371558	99	54	44,7	cyclictest	388	-21	dbus-daemon	09:24:28	0
3371559	99	53	47,4	cyclictest	3426065	-21	kworker/u4:4+events_unbound	10:13:43	1
3371559	99	53	45,6	cyclictest	3525010	-21	systemd	11:34:52	1
3371559	99	53	45,6	cyclictest	3381613	-21	kworker/u4:6+events_unbound	08:34:24	1
3371558	99	53	46,5	cyclictest	3572170	-21	/usr/sbin/munin	12:30:20	0
3371558	99	53	43,8	cyclictest	388	-21	dbus-daemon	10:09:37	0
3371558	99	53	43,5	cyclictest	0	-21	swapper/0	08:05:36	0
3371559	99	52	35,6	cyclictest	3489501	-21	kworker/u4:3+events_unbound	10:59:43	1
3371558	99	52	43,7	cyclictest	3371557	-21	cyclictest	10:25:14	0
3371558	99	52	42,7	cyclictest	3553034	-21	kworker/u4:11+events_unbound	12:10:00	0
3371559	99	51	44,5	cyclictest	3428240	-21	aten_r7power_en	09:40:15	1
3371559	99	51	43,6	cyclictest	3391982	-21	systemd	08:29:22	1
3371559	99	51	43,5	cyclictest	3487204	-21	ssh	10:50:01	1
3371559	99	51	43,5	cyclictest	0	-21	swapper/1	11:14:47	1
3371559	99	51	42,7	cyclictest	3533419	-21	sd-accept	11:44:54	1
3371558	99	51	44,5	cyclictest	3374463	-21	df_abs	07:20:17	0
3371558	99	51	43,5	cyclictest	3538259	-21	diskstats	11:50:19	0
3371558	99	51	43,5	cyclictest	0	-21	swapper/0	10:00:30	0
3371558	99	51	43,5	cyclictest	0	-21	swapper/0	10:00:30	0
3371559	99	50	43,5	cyclictest	3437339	-21	ssh	09:50:28	1
3371559	99	50	41,6	cyclictest	3563946	-21	ld	12:20:27	1
3371559	99	50	41,6	cyclictest	3563946	-21	ld	12:20:27	1
3371559	99	50	39,8	cyclictest	37	-21	kcompactd0	10:25:13	1
3371558	99	50	43,5	cyclictest	3579862	-21	latency_hist	12:40:01	0
3371558	99	50	42,5	cyclictest	3548771	-21	kworker/u4:0-nfsiod	12:15:23	0
3371558	99	50	42,5	cyclictest	3548771	-21	kworker/u4:0-nfsiod	12:15:23	0
3371558	99	50	41,6	cyclictest	3388837	-21	ntpq	08:15:23	0
3371559	99	49	42,5	cyclictest	3424209	-21	fschecks_time	09:35:19	1
3371559	99	49	42,5	cyclictest	3415296	-21	acpi	09:25:11	1
3371559	99	49	41,6	cyclictest	3512630	-21	latency_hist	11:20:02	1
3371559	99	49	41,6	cyclictest	3371787	-21	aten_r7power_en	07:10:15	1
3371559	99	49	41,5	cyclictest	3462947	-21	ntp_kernel_pll_	10:20:30	1
3371559	99	49	40,7	cyclictest	3419893	-21	fschecks_count	09:30:19	1
3371559	99	49	40,7	cyclictest	3398205	-21	timerwakeupswit	08:50:35	1
3371559	99	49	40,7	cyclictest	3317334	-21	kworker/u4:12+events_unbound	08:09:21	1
3371558	99	49	42,5	cyclictest	3542211	-21	aten2__	11:55:15	0
3371558	99	49	42,5	cyclictest	3406483	-21	grep	09:15:01	0
3371558	99	49	30,11	cyclictest	0	-21	swapper/0	08:45:01	0
3371559	99	48	41,5	cyclictest	3406495	-21	sh	09:15:01	1
3371559	99	48	40,6	cyclictest	3544477	-21	kworker/u4:3+events_unbound	12:05:01	1
3371559	99	48	40,6	cyclictest	3377816	-21	kworker/u4:3+events_unbound	07:49:16	1
3371559	99	48	40,6	cyclictest	3375311	-21	kworker/u4:1+events_unbound	07:30:00	1
3371559	99	48	39,7	cyclictest	3520800	-21	systemd	11:29:52	1
3371559	99	48	39,7	cyclictest	3432519	-21	aten_r7power_po	09:45:18	1
3371559	99	48	38,8	cyclictest	3395950	-21	latency_hist	08:45:02	1
3371558	99	48	42,4	cyclictest	3371557	-21	cyclictest	10:30:36	0
3371558	99	48	40,6	cyclictest	3534070	-21	/usr/sbin/munin	11:45:18	0
3371558	99	48	37,8	cyclictest	3508850	-21	grep	11:15:18	0
3371558	99	48	37,8	cyclictest	3492917	-21	sed	10:55:40	0
3371558	99	48	30,16	cyclictest	3533567	-21	latency_hist	11:45:02	0
3371558	99	48	27,18	cyclictest	3384123	-21	kworker/u4:8+rpciod	08:00:00	0
3371558	99	48	27,18	cyclictest	3384123	-21	kworker/u4:8+rpciod	07:59:59	0
3371559	99	47	40,5	cyclictest	3412223	-21	unixbench-2d	09:20:38	1
3371559	99	47	40,5	cyclictest	3407231	-21	gltestperf	09:15:20	1
3371559	99	47	38,7	cyclictest	314	-21	systemd-journal	10:04:36	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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