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 Dec 02, 2025 12:43:53)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
534	2	329	321,5	sleep2	0	-21	swapper/2	07:07:53	2
31096	2	316	309,4	sleep3	0	-21	swapper/3	07:05:01	3
413	2	315	308,4	sleep0	0	-21	swapper/0	07:06:23	0
401	2	314	306,5	sleep1	0	-21	swapper/1	07:06:16	1
1016	99	301	0,300	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	10:55:14	2
1017	99	300	0,299	cyclictest	20198	-21	kworker/u16:0+efi_rts_wq	11:55:14	3
1017	99	299	0,298	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	08:18:18	3
1017	99	298	0,297	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	07:20:13	3
1017	99	298	0,297	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	08:25:13	3
1014	99	297	0,295	cyclictest	20198	-21	kworker/u16:0+efi_rts_wq	11:50:14	0
1017	99	296	0,295	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	10:08:35	3
1017	99	295	0,294	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	11:00:15	3
1014	99	295	0,294	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	07:15:12	0
1014	99	294	0,293	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	10:00:12	0
1014	99	294	0,293	cyclictest	20198	-21	kworker/u16:0+efi_rts_wq	12:20:15	0
1017	99	293	0,292	cyclictest	13267	-21	kworker/u16:2+efi_rts_wq	11:30:13	3
1017	99	293	0,291	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	10:50:13	3
1015	99	293	0,292	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	08:38:22	1
1017	99	292	0,291	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	08:35:13	3
1017	99	292	0,291	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	07:55:19	3
1014	99	292	0,291	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	09:08:27	0
1014	99	291	0,290	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	08:58:25	0
1016	99	290	0,289	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	09:05:13	2
1015	99	290	0,289	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	07:38:09	1
1015	99	289	0,288	cyclictest	20198	-21	kworker/u16:0+efi_rts_wq	11:55:14	1
1016	99	288	0,287	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	10:05:15	2
1016	99	288	0,287	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	07:45:13	2
1016	99	287	0,286	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	08:55:16	2
1014	99	287	0,286	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	09:50:13	0
1014	99	287	0,286	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	09:38:31	0
1015	99	286	0,285	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	09:45:13	1
1016	99	284	0,282	cyclictest	5444	-21	kworker/u16:3+efi_rts_wq	11:15:14	2
1014	99	284	0,281	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	10:35:15	0
1016	99	283	0,282	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	10:43:45	2
1015	99	282	0,281	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	08:00:12	1
1017	99	281	0,280	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	10:30:12	3
1014	99	281	0,280	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	10:40:13	0
1016	99	280	0,279	cyclictest	31773	-21	kworker/u16:4+efi_rts_wq	12:35:15	2
1017	99	279	0,278	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	07:50:10	3
1016	99	278	0,277	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	08:33:21	2
1017	99	276	0,275	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	09:15:13	3
1017	99	276	0,275	cyclictest	20198	-21	kworker/u16:0+efi_rts_wq	11:43:57	3
1015	99	276	0,275	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	09:23:29	1
1015	99	276	0,275	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	10:18:37	1
1014	99	276	0,275	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	08:50:13	0
1015	99	275	0,274	cyclictest	5444	-21	kworker/u16:3+efi_rts_wq	11:05:15	1
1014	99	274	0,273	cyclictest	5444	-21	kworker/u16:3+efi_rts_wq	11:08:50	0
1017	99	272	0,271	cyclictest	31073	-21	kworker/u16:0+efi_rts_wq	08:10:14	3
1016	99	272	0,271	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	10:20:13	2
1016	99	272	0,271	cyclictest	23232	-21	kworker/u16:2+efi_rts_wq	08:00:12	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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