OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #8

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.
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 rackbslot8s (updated Mon May 04, 2026 00:44:17)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3466742	2	120	107,8	sleep0	0	-21	swapper/0	19:05:24	0
3466756	2	119	105,9	sleep5	0	-21	swapper/5	19:05:36	5
3467056	2	118	103,9	sleep6	0	-21	swapper/6	19:09:53	6
3466776	2	115	100,10	sleep7	0	-21	swapper/7	19:05:54	7
3467051	2	114	100,9	sleep1	0	-21	swapper/1	19:09:49	1
3467044	2	113	98,10	sleep3	0	-21	swapper/3	19:09:42	3
3467036	2	109	95,9	sleep4	0	-21	swapper/4	19:09:35	4
3466942	2	109	95,9	sleep2	0	-21	swapper/2	19:08:13	2
3467307	99	107	0,103	cyclictest	14	1	rcu_preempt	22:45:22	2
3467299	99	103	0,102	cyclictest	0	-21	swapper/0	23:36:45	0
3467324	99	102	0,100	cyclictest	0	-21	swapper/6	19:32:36	6
3467324	99	102	0,100	cyclictest	0	-21	swapper/6	19:23:36	6
3467307	99	102	101,0	cyclictest	0	-21	swapper/2	19:10:07	2
3467307	99	102	0,0	cyclictest	0	-21	swapper/2	22:08:45	2
3467299	99	102	99,3	cyclictest	553	-21	snmpd	21:21:30	0
3467299	99	102	99,3	cyclictest	553	-21	snmpd	19:59:41	0
3467329	99	101	0,100	cyclictest	0	-21	swapper/7	22:07:44	7
3467329	99	101	0,100	cyclictest	0	-21	swapper/7	21:40:52	7
3467324	99	101	99,2	cyclictest	553	-21	snmpd	22:58:16	6
3467324	99	101	99,2	cyclictest	553	-21	snmpd	00:22:25	6
3467324	99	101	98,3	cyclictest	553	-21	snmpd	22:29:36	6
3467324	99	101	0,100	cyclictest	0	-21	swapper/6	23:27:38	6
3467324	99	101	0,100	cyclictest	0	-21	swapper/6	23:01:43	6
3467324	99	101	0,100	cyclictest	0	-21	swapper/6	21:13:42	6
3467324	99	101	0,0	cyclictest	0	-21	swapper/6	20:01:22	6
3467315	99	101	99,2	cyclictest	553	-21	snmpd	19:58:52	4
3467315	99	101	98,3	cyclictest	553	-21	snmpd	22:53:31	4
3467312	99	101	99,2	cyclictest	553	-21	snmpd	23:37:36	3
3467312	99	101	99,2	cyclictest	553	-21	snmpd	20:05:43	3
3467312	99	101	99,1	cyclictest	605	-21	lldpd	20:43:42	3
3467312	99	101	100,1	cyclictest	553	-21	snmpd	23:43:48	3
3467307	99	101	99,2	cyclictest	3545419	-21	kworker/2:2	21:49:03	2
3467307	99	101	99,2	cyclictest	3521142	-21	kworker/2:1	21:07:24	2
3467307	99	101	99,2	cyclictest	3521142	-21	kworker/2:1	21:01:16	2
3467307	99	101	99,2	cyclictest	3521142	-21	kworker/2:1	21:01:16	2
3467307	99	101	99,2	cyclictest	3521142	-21	kworker/2:1	20:59:32	2
3467307	99	101	99,2	cyclictest	3480495	-21	kworker/2:2	20:15:56	2
3467307	99	101	99,2	cyclictest	3436303	-21	kworker/2:1	19:23:10	2
3467307	99	101	99,2	cyclictest	31	-21	ksoftirqd/2	20:51:39	2
3467307	99	101	99,2	cyclictest	31	-21	ksoftirqd/2	20:45:57	2
3467307	99	101	99,2	cyclictest	31	-21	ksoftirqd/2	20:41:38	2
3467307	99	101	99,2	cyclictest	31	-21	ksoftirqd/2	20:30:52	2
3467307	99	101	99,2	cyclictest	31	-21	ksoftirqd/2	19:51:10	2
3467307	99	101	99,2	cyclictest	31	-21	ksoftirqd/2	19:26:34	2
3467307	99	101	99,2	cyclictest	0	-21	swapper/2	20:29:35	2
3467307	99	101	99,2	cyclictest	0	-21	swapper/2	19:41:32	2
3467307	99	101	1,1	cyclictest	31	-21	ksoftirqd/2	23:22:39	2
3467307	99	101	1,1	cyclictest	31	-21	ksoftirqd/2	22:35:01	2
3467307	99	101	1,1	cyclictest	31	-21	ksoftirqd/2	00:00:58	2
3467307	99	101	100,1	cyclictest	31	-21	ksoftirqd/2	19:58:43	2
3467307	99	101	0,1	cyclictest	31	-21	ksoftirqd/2	21:30:20	2
3467307	99	101	0,101	cyclictest	0	-21	swapper/2	20:05:18	2
3467307	99	101	0,101	cyclictest	0	-21	swapper/2	20:01:49	2
3467307	99	101	0,101	cyclictest	0	-21	swapper/2	00:14:50	2
3467307	99	101	0,100	cyclictest	0	-21	swapper/2	23:45:54	2
3467307	99	101	0,0	cyclictest	0	-21	swapper/2	21:51:40	2
3467303	99	101	99,2	cyclictest	553	-21	snmpd	21:27:28	1
3467303	99	101	99,2	cyclictest	553	-21	snmpd	21:17:49	1
3467303	99	101	99,2	cyclictest	553	-21	snmpd	00:03:28	1
3467303	99	101	0,100	cyclictest	0	-21	swapper/1	20:42:20	1
3467299	99	101	99,2	cyclictest	553	-21	snmpd	23:53:04	0
3467299	99	101	0,100	cyclictest	0	-21	swapper/0	22:00:27	0
3467329	99	100	0,99	cyclictest	0	-21	swapper/7	23:40:46	7
3467329	99	100	0,99	cyclictest	0	-21	swapper/7	21:00:28	7
3467329	99	100	0,99	cyclictest	0	-21	swapper/7	21:00:28	7
3467329	99	100	0,99	cyclictest	0	-21	swapper/7	20:31:33	7
3467329	99	100	0,99	cyclictest	0	-21	swapper/7	00:29:41	7
3467329	99	100	0,100	cyclictest	0	-21	swapper/7	23:05:22	7
3467329	99	100	0,100	cyclictest	0	-21	swapper/7	21:59:48	7
3467329	99	100	0,100	cyclictest	0	-21	swapper/7	20:42:39	7
3467329	99	100	0,100	cyclictest	0	-21	swapper/7	00:30:14	7
3467324	99	100	99,1	cyclictest	553	-21	snmpd	23:33:42	6
3467324	99	100	99,1	cyclictest	553	-21	snmpd	23:20:38	6
3467324	99	100	99,1	cyclictest	553	-21	snmpd	21:53:39	6
3467324	99	100	99,1	cyclictest	553	-21	snmpd	21:47:10	6
3467324	99	100	99,1	cyclictest	553	-21	snmpd	21:42:01	6
3467324	99	100	98,2	cyclictest	553	-21	snmpd	19:35:12	6
3467324	99	100	0,99	cyclictest	0	-21	swapper/6	22:39:45	6
3467324	99	100	0,99	cyclictest	0	-21	swapper/6	19:57:12	6
3467324	99	100	0,99	cyclictest	0	-21	swapper/6	00:32:33	6
3467324	99	100	0,100	cyclictest	0	-21	swapper/6	20:19:37	6
3467320	99	100	99,1	cyclictest	553	-21	snmpd	23:05:05	5
3467320	99	100	99,1	cyclictest	553	-21	snmpd	23:02:40	5
3467320	99	100	99,1	cyclictest	553	-21	snmpd	22:51:46	5
3467320	99	100	99,1	cyclictest	553	-21	snmpd	22:30:30	5
3467320	99	100	99,1	cyclictest	553	-21	snmpd	21:08:42	5
3467320	99	100	99,1	cyclictest	553	-21	snmpd	20:25:18	5
3467320	99	100	99,1	cyclictest	553	-21	snmpd	19:10:29	5
3467320	99	100	0,99	cyclictest	0	-21	swapper/5	20:35:09	5
3467320	99	100	0,99	cyclictest	0	-21	swapper/5	20:34:06	5
3467320	99	100	0,99	cyclictest	0	-21	swapper/5	00:06:29	5
3467320	99	100	0,100	cyclictest	0	-21	swapper/5	23:26:53	5
3467320	99	100	0,100	cyclictest	0	-21	swapper/5	00:20:14	5
3467315	99	100	99,1	cyclictest	553	-21	snmpd	20:15:52	4
3467315	99	100	99,1	cyclictest	3481636	-21	cat	19:35:16	4
3467315	99	100	98,2	cyclictest	553	-21	snmpd	23:36:09	4
3467315	99	100	98,2	cyclictest	553	-21	snmpd	23:34:36	4
3467315	99	100	98,2	cyclictest	553	-21	snmpd	20:21:46	4
3467315	99	100	95,2	cyclictest	553	-21	snmpd	22:14:24	4
3467315	99	100	0,99	cyclictest	0	-21	swapper/4	00:30:33	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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