OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #3

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 50 highest latencies:

System rackcslot3s.osadl.org (updated Tue Apr 28, 2026 12:43:55)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
12739	2	328	305,4	sleep3	0	-21	swapper/3	07:08:18	3
10800	2	324	318,4	sleep2	0	-21	swapper/2	07:05:02	2
12811	2	316	302,4	sleep1	0	-21	swapper/1	07:09:14	1
13138	99	315	0,314	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	09:20:12	2
12711	2	314	306,5	sleep0	0	-21	swapper/0	07:07:55	0
13138	99	313	0,312	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	08:35:14	2
13139	99	311	0,310	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	07:45:13	3
13139	99	311	0,310	cyclictest	20255	-21	kworker/u16:3+efi_rts_wq	11:10:12	3
13138	99	311	0,310	cyclictest	20255	-21	kworker/u16:3+efi_rts_wq	11:02:29	2
13138	99	311	0,310	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	08:45:14	2
13138	99	310	0,309	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	08:52:05	2
13136	99	308	0,307	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	09:15:13	0
13137	99	307	0,306	cyclictest	17499	-21	kworker/u16:2+efi_rts_wq	11:27:31	1
13136	99	307	0,306	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	10:05:14	0
13136	99	307	0,306	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	07:35:13	0
13137	99	306	0,305	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	09:47:15	1
13139	99	303	0,302	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	09:25:12	3
13136	99	300	0,299	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	10:15:12	0
13136	99	299	0,298	cyclictest	28426	-21	kworker/u16:0+efi_rts_wq	12:35:13	0
13139	99	298	0,297	cyclictest	20255	-21	kworker/u16:3+efi_rts_wq	12:05:13	3
13139	99	298	0,297	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	10:17:19	3
13137	99	298	0,297	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	09:40:14	1
13137	99	297	0,296	cyclictest	9441	-21	kworker/u16:1+efi_rts_wq	10:45:14	1
13137	99	297	0,296	cyclictest	9441	-21	kworker/u16:1+efi_rts_wq	10:45:13	1
13137	99	297	0,296	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	08:25:14	1
13137	99	297	0,296	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	09:05:15	1
13136	99	297	0,296	cyclictest	17499	-21	kworker/u16:2+efi_rts_wq	10:57:27	0
13139	99	296	0,295	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	08:37:02	3
13139	99	295	0,294	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	09:35:12	3
13139	99	295	0,294	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	07:55:12	3
13136	99	295	0,294	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	08:40:11	0
13136	99	295	0,294	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	07:40:12	0
13139	99	294	0,292	cyclictest	13199	-21	kworker/u16:1+efi_rts_wq	12:00:14	3
13136	99	294	0,293	cyclictest	28426	-21	kworker/u16:0+efi_rts_wq	12:15:10	0
13136	99	293	0,292	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	10:20:11	0
13136	99	293	0,292	cyclictest	17499	-21	kworker/u16:2+efi_rts_wq	11:25:11	0
13139	99	292	0,290	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	07:10:16	3
13137	99	292	0,291	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	07:25:14	1
13139	99	291	0,290	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	10:02:16	3
13139	99	291	0,290	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	08:57:06	3
13139	99	287	0,286	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	07:25:13	3
13138	99	284	0,282	cyclictest	20255	-21	kworker/u16:3+efi_rts_wq	11:05:13	2
13139	99	283	0,282	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	09:10:11	3
13139	99	283	0,282	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	08:00:14	3
13138	99	283	0,282	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	07:30:14	2
13137	99	281	0,280	cyclictest	17499	-21	kworker/u16:2+efi_rts_wq	11:15:14	1
13136	99	281	0,280	cyclictest	12634	-21	kworker/u16:3+efi_rts_wq	09:45:12	0
13139	99	280	0,279	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	07:15:00	3
13137	99	280	0,279	cyclictest	25689	-21	kworker/u16:0+efi_rts_wq	08:42:03	1
13137	99	278	0,277	cyclictest	28426	-21	kworker/u16:0+efi_rts_wq	12:10:12	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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