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 Fri Apr 10, 2026 12:43:54)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
9532	2	321	314,5	sleep3	0	-21	swapper/3	07:07:55	3
9356	2	321	314,5	sleep0	0	-21	swapper/0	07:05:40	0
9531	2	319	313,4	sleep2	0	-21	swapper/2	07:07:54	2
9490	2	319	312,4	sleep1	0	-21	swapper/1	07:07:21	1
9961	99	312	0,311	cyclictest	13904	-21	kworker/u16:0+efi_rts_wq	08:55:13	2
9960	99	312	0,311	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	08:45:12	1
9960	99	312	0,310	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	09:20:12	1
9959	99	312	0,311	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	08:25:13	0
9962	99	311	0,310	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	09:10:11	3
9960	99	311	0,310	cyclictest	13957	-21	kworker/u16:1+efi_rts_wq	10:45:12	1
9961	99	310	0,309	cyclictest	13904	-21	kworker/u16:0+efi_rts_wq	07:15:12	2
9961	99	309	0,308	cyclictest	27803	-21	kworker/u16:2+efi_rts_wq	11:45:13	2
9959	99	309	0,308	cyclictest	27803	-21	kworker/u16:2+efi_rts_wq	11:22:46	0
9959	99	308	0,307	cyclictest	13904	-21	kworker/u16:0+efi_rts_wq	09:45:11	0
9960	99	306	0,305	cyclictest	13904	-21	kworker/u16:0+efi_rts_wq	08:05:12	1
9959	99	306	0,305	cyclictest	13957	-21	kworker/u16:1+efi_rts_wq	10:55:14	0
9962	99	305	0,304	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	12:28:01	3
9962	99	305	0,304	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	09:02:21	3
9959	99	305	0,304	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	11:50:11	0
9960	99	304	0,303	cyclictest	13904	-21	kworker/u16:0+efi_rts_wq	08:50:13	1
9960	99	303	0,302	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	09:52:31	1
9959	99	303	0,302	cyclictest	18258	-21	kworker/u16:1+efi_rts_wq	12:10:12	0
9959	99	303	0,301	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	10:37:38	0
9962	99	302	0,301	cyclictest	13957	-21	kworker/u16:1+efi_rts_wq	11:00:13	3
9960	99	302	0,301	cyclictest	27803	-21	kworker/u16:2+efi_rts_wq	11:40:11	1
9962	99	301	0,300	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	09:30:14	3
9960	99	301	0,300	cyclictest	13904	-21	kworker/u16:0+efi_rts_wq	09:55:12	1
9960	99	301	0,300	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	08:00:13	1
9961	99	300	0,299	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	08:35:12	2
9959	99	300	0,299	cyclictest	13904	-21	kworker/u16:0+efi_rts_wq	09:25:12	0
9959	99	299	0,298	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	11:35:12	0
9962	99	297	0,296	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	11:55:10	3
9962	99	297	0,296	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	11:42:50	3
9960	99	297	0,296	cyclictest	13904	-21	kworker/u16:0+efi_rts_wq	09:15:12	1
9960	99	297	0,296	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	12:15:12	1
9960	99	297	0,294	cyclictest	13904	-21	kworker/u16:0+efi_rts_wq	07:15:02	1
9962	99	295	0,294	cyclictest	13904	-21	kworker/u16:0+efi_rts_wq	07:25:13	3
9962	99	295	0,294	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	09:35:12	3
9962	99	295	0,294	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	07:22:04	3
9960	99	295	0,294	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	11:20:11	1
9960	99	295	0,294	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	10:50:12	1
9962	99	294	0,293	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	11:25:13	3
9962	99	293	0,292	cyclictest	18258	-21	kworker/u16:1+efi_rts_wq	12:38:03	3
9962	99	293	0,292	cyclictest	13957	-21	kworker/u16:1+efi_rts_wq	11:10:12	3
9962	99	290	0,289	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	07:12:02	3
9961	99	290	0,289	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	12:25:14	2
9962	99	289	0,288	cyclictest	13904	-21	kworker/u16:0+efi_rts_wq	08:20:13	3
9959	99	288	0,287	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	09:50:12	0
9962	99	287	0,286	cyclictest	13310	-21	kworker/u16:3+efi_rts_wq	10:40:12	3
9960	99	286	0,285	cyclictest	13904	-21	kworker/u16:0+efi_rts_wq	07:35:13	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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