OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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
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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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackcslot7s.osadl.org (updated Fri Dec 19, 2025 12:44:53)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3978874	2	114	0,10	sleep1	3978876	-21	processes	11:30:28	1
4001235	2	111	0,5	sleep3	41	1	rcuc/3	12:30:30	3
3979059	2	107	0,4	sleep0	0	-21	swapper/0	11:30:31	0
3913375	2	95	0,8	sleep3	42	-21	ksoftirqd/3	08:25:19	3
3984280	2	93	0,4	sleep3	0	-21	swapper/3	11:45:24	3
3984280	2	93	0,4	sleep3	0	-21	swapper/3	11:45:23	3
3887940	2	93	0,6	sleep1	0	-21	swapper/1	07:15:06	1
3933296	2	92	0,6	sleep3	0	-21	swapper/3	09:20:24	3
3933296	2	92	0,6	sleep3	0	-21	swapper/3	09:20:24	3
1973	99	83	0,5	rtkit-daemon	0	-21	swapper/0	09:55:39	0
1973	99	83	0,5	rtkit-daemon	0	-21	swapper/0	07:40:43	0
1973	99	82	0,6	rtkit-daemon	4497	-21	PK-Backend	07:55:25	0
1973	99	82	0,5	rtkit-daemon	0	-21	swapper/0	08:56:21	0
1973	99	81	0,4	rtkit-daemon	0	-21	swapper/0	08:13:52	0
1973	99	80	0,6	rtkit-daemon	4497	-21	PK-Backend	09:24:20	1
1973	99	80	0,6	rtkit-daemon	4497	-21	PK-Backend	09:24:20	1
1973	99	80	0,6	rtkit-daemon	4497	-21	PK-Backend	07:10:15	0
1973	99	79	0,6	rtkit-daemon	0	-21	swapper/0	09:41:08	0
1973	99	79	0,5	rtkit-daemon	0	-21	swapper/0	07:33:52	0
1973	99	78	0,5	rtkit-daemon	0	-21	swapper/0	08:32:12	0
1973	99	77	0,5	rtkit-daemon	4497	-21	PK-Backend	07:50:16	0
1973	99	75	0,60	rtkit-daemon	0	-21	swapper/0	07:08:52	0
3884055	2	73	47,16	sleep3	0	-21	swapper/3	07:05:12	3
1973	99	73	0,5	rtkit-daemon	0	-21	swapper/0	09:48:54	0
1973	99	72	0,4	rtkit-daemon	4497	-21	PK-Backend	10:46:10	1
3885529	2	65	46,12	sleep2	0	-21	swapper/2	07:10:01	2
3906349	2	63	0,5	sleep2	33	1	rcuc/2	08:05:21	2
3885381	2	63	42,14	sleep1	0	-21	swapper/1	07:08:10	1
1973	99	61	0,9	rtkit-daemon	1972	-21	rtkit-daemon	10:27:20	0
1973	99	61	0,9	rtkit-daemon	1972	-21	rtkit-daemon	10:20:10	1
3885674	99	60	20,35	cyclictest	3972782	-21	expr	11:15:13	1
3885674	99	59	18,11	cyclictest	3912231	-21	seq	08:22:50	1
3938850	2	58	0,7	sleep0	0	-21	swapper/0	09:35:29	0
1973	99	58	0,9	rtkit-daemon	1972	-21	rtkit-daemon	10:10:44	0
3885674	99	57	14,13	cyclictest	2372	-21	snap-store	12:27:39	1
3885674	99	56	19,32	cyclictest	3993677	-21	grep	12:10:25	1
3885674	99	56	19,32	cyclictest	3993677	-21	grep	12:10:25	1
3885674	99	55	15,11	cyclictest	3996179	-21	date	12:20:01	1
1973	99	55	0,8	rtkit-daemon	1972	-21	rtkit-daemon	11:58:29	1
3885679	99	54	46,5	cyclictest	34	1	ksoftirqd/2	11:21:02	2
3885679	99	54	46,5	cyclictest	34	1	ksoftirqd/2	11:21:02	2
3885674	99	54	13,13	cyclictest	3996770	-21	basename	12:20:19	1
3885674	99	52	9,13	cyclictest	3930995	-21	hddtemp_smartct	09:15:18	1
3885674	99	52	3,20	cyclictest	3925842	-21	ntpq	09:00:24	1
3885674	99	52	19,6	cyclictest	3887469	-21	latency_hist	07:15:01	1
3885674	99	52	15,12	cyclictest	3943078	-21	awk	09:50:11	1
3885674	99	52	12,11	cyclictest	3952549	-21	swap	10:15:28	1
3999510	2	51	0,4	chrt	0	-21	swapper/2	12:26:06	2
3885674	99	51	18,8	cyclictest	4497	-21	PK-Backend	09:25:12	1
3885674	99	51	17,7	cyclictest	3940154	-21	missed_timers	09:40:23	1
3885674	99	51	16,8	cyclictest	3947221	-21	ntp_offset	10:00:23	1
3885674	99	51	14,11	cyclictest	3989564	-21	expr	12:00:15	1
3885674	99	51	1,10	cyclictest	3977764	-21	cut	11:30:00	1
3885674	99	50	18,8	cyclictest	3950687	-21	ntp_states	10:10:24	1
3885674	99	50	18,7	cyclictest	4497	-21	PK-Backend	09:56:15	1
3885674	99	50	17,8	cyclictest	4497	-21	PK-Backend	11:01:26	1
3885674	99	50	17,29	cyclictest	3969414	-21	if_enp2s0	11:05:19	1
3885674	99	50	15,7	cyclictest	3982429	-21	missed_timers	11:40:22	1
3885674	99	50	15,7	cyclictest	3971161	-21	if_enp2s0	11:10:21	1
3885674	99	50	14,7	cyclictest	3905652	-21	latency_hist	08:05:01	1
3885674	99	50	10,10	cyclictest	3929086	-21	cat	09:10:15	1
3885674	99	49	18,7	cyclictest	4497	-21	PK-Backend	08:35:54	1
3885674	99	49	18,7	cyclictest	4497	-21	PK-Backend	08:33:49	1
3885674	99	49	16,6	cyclictest	3898347	-21	latency_hist	07:45:01	1
3885674	99	49	15,7	cyclictest	3938788	-21	timerandwakeup	09:35:30	1
3885674	99	49	15,7	cyclictest	3892049	-21	kernelversion	07:25:21	1
3885674	99	49	10,12	cyclictest	3975318	-21	systemd-udevd	11:21:00	1
3885674	99	49	10,12	cyclictest	3975318	-21	systemd-udevd	11:21:00	1
3885674	99	49	10,10	cyclictest	3941349	-21	cpu	09:45:13	1
3885674	99	48	6,12	cyclictest	3986759	-21	apt-get	11:55:01	1
3885674	99	48	17,7	cyclictest	4497	-21	PK-Backend	08:40:42	1
3885674	99	48	17,10	cyclictest	3890285	-21	if_err_enp2s0	07:20:18	1
3885674	99	48	14,7	cyclictest	1137	-21	runrttasks	09:32:03	1
3885674	99	48	13,8	cyclictest	3979810	-21	ls	11:35:13	1
3885674	99	48	13,7	cyclictest	3913563	-21	missed_timers	08:25:21	1
3885674	99	47	16,7	cyclictest	3949256	-21	timerwakeupswit	10:05:30	1
3885674	99	47	11,9	cyclictest	3909657	-21	if_enp2s0	08:15:18	1
3885674	99	46	2,17	cyclictest	3903416	-40	lsb_release	07:56:02	1
3885674	99	46	13,6	cyclictest	3992613	-21	latency_hist	12:10:01	1
3885674	99	46	10,7	cyclictest	0	-21	swapper/1	08:55:20	1
3903958	2	45	0,7	sleep2	0	-21	swapper/2	08:00:01	2
3885674	99	45	2,16	cyclictest	3956611	-21	munin-run	10:30:01	1
3885674	99	45	14,7	cyclictest	4497	-21	PK-Backend	07:36:06	1
3885679	99	44	26,14	cyclictest	34	-21	ksoftirqd/2	09:15:00	2
3885679	99	44	18,15	cyclictest	34	-21	ksoftirqd/2	12:00:59	2
3885674	99	44	2,17	cyclictest	3957676	-21	grep	10:30:27	1
3885674	99	44	2,17	cyclictest	3957676	-21	grep	10:30:27	1
3885674	99	44	2,15	cyclictest	3894161	-21	python3	07:30:26	1
3885674	99	43	2,8	cyclictest	3927588	-21	ntp_states	09:05:25	1
3885669	99	43	23,16	cyclictest	3975719	-21	apt-get	11:25:04	0
1973	99	43	0,31	rtkit-daemon	4497	-21	PK-Backend	09:34:48	0
3969526	2	42	0,14	sleep0	13	-21	ksoftirqd/0	11:05:19	0
1973	99	42	0,33	rtkit-daemon	13	-21	ksoftirqd/0	11:59:55	0
3885683	99	41	22,6	cyclictest	42	-21	ksoftirqd/3	11:30:10	3
3885683	99	41	20,10	cyclictest	3981006	-21	systemd-udevd	11:37:30	3
3885683	99	41	1,4	cyclictest	4497	-21	PK-Backend	12:05:14	3
3885679	99	41	27,10	cyclictest	3986759	-21	apt-get	11:55:01	2
3885674	99	41	11,9	cyclictest	3906438	-21	grep	08:05:22	1
3885669	99	41	26,11	cyclictest	3893005	-21	cron	07:29:59	0
3885683	99	40	22,13	cyclictest	438	-20	systemd-journal	07:37:11	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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