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 Thu Dec 18, 2025 00:43:55)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1145	2	319	312,5	sleep2	0	-21	swapper/2	19:07:06	2
1284	2	318	305,4	sleep1	0	-21	swapper/1	19:08:53	1
1079	2	318	311,4	sleep3	0	-21	swapper/3	19:06:14	3
1131	2	316	303,5	sleep0	0	-21	swapper/0	19:06:56	0
1637	99	314	0,313	cyclictest	32694	-21	kworker/u16:3+efi_rts_wq	00:31:37	0
1639	99	313	0,312	cyclictest	32694	-21	kworker/u16:3+efi_rts_wq	00:16:35	2
1638	99	313	0,312	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	22:24:22	1
1637	99	313	0,312	cyclictest	15383	-21	kworker/u16:1+efi_rts_wq	22:50:12	0
1640	99	312	0,311	cyclictest	32694	-21	kworker/u16:3+efi_rts_wq	23:15:14	3
1640	99	312	0,311	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	21:45:12	3
1640	99	311	0,310	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	20:35:14	3
1639	99	311	0,310	cyclictest	15383	-21	kworker/u16:1+efi_rts_wq	22:45:13	2
1637	99	309	0,308	cyclictest	10856	-21	kworker/u16:0+efi_rts_wq	23:25:12	0
1640	99	308	0,307	cyclictest	15383	-21	kworker/u16:1+efi_rts_wq	22:30:13	3
1640	99	307	0,306	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	21:15:12	3
1640	99	303	0,302	cyclictest	6506	-21	kworker/u16:2+efi_rts_wq	21:10:12	3
1640	99	303	0,302	cyclictest	6506	-21	kworker/u16:2+efi_rts_wq	21:10:12	3
1640	99	303	0,302	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	21:35:13	3
1640	99	303	0,301	cyclictest	32694	-21	kworker/u16:3+efi_rts_wq	23:45:12	3
1639	99	302	0,301	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	20:35:14	2
1638	99	302	0,301	cyclictest	32694	-21	kworker/u16:3+efi_rts_wq	22:54:27	1
1637	99	302	0,301	cyclictest	15383	-21	kworker/u16:1+efi_rts_wq	22:30:12	0
1638	99	301	0,300	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	20:20:13	1
1638	99	300	0,299	cyclictest	10856	-21	kworker/u16:0+efi_rts_wq	23:56:30	1
1640	99	298	0,297	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	21:55:11	3
1639	99	298	0,297	cyclictest	32694	-21	kworker/u16:3+efi_rts_wq	23:45:14	2
1639	99	298	0,297	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	21:05:15	2
1639	99	297	0,296	cyclictest	15383	-21	kworker/u16:1+efi_rts_wq	22:39:24	2
1637	99	297	0,296	cyclictest	6506	-21	kworker/u16:2+efi_rts_wq	21:00:13	0
1640	99	296	0,295	cyclictest	15383	-21	kworker/u16:1+efi_rts_wq	21:34:13	3
1638	99	295	0,294	cyclictest	32694	-21	kworker/u16:3+efi_rts_wq	00:15:14	1
1638	99	295	0,294	cyclictest	10856	-21	kworker/u16:0+efi_rts_wq	23:20:15	1
1639	99	294	0,293	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	22:40:13	2
1638	99	293	0,292	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	20:15:14	1
1638	99	292	0,291	cyclictest	32694	-21	kworker/u16:3+efi_rts_wq	23:50:11	1
1637	99	292	0,291	cyclictest	6506	-21	kworker/u16:2+efi_rts_wq	20:45:12	0
1640	99	291	0,290	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	22:04:19	3
1639	99	290	0,289	cyclictest	32694	-21	kworker/u16:3+efi_rts_wq	00:00:13	2
1639	99	290	0,288	cyclictest	25368	-21	kworker/u16:2+efi_rts_wq	23:05:13	2
1638	99	290	0,289	cyclictest	6506	-21	kworker/u16:2+efi_rts_wq	19:43:50	1
1640	99	287	0,286	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	21:54:17	3
1639	99	287	0,286	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	20:15:13	2
1638	99	286	0,285	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	20:40:13	1
1638	99	285	0,284	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	19:15:01	1
1639	99	284	0,283	cyclictest	32694	-21	kworker/u16:3+efi_rts_wq	23:40:11	2
1640	99	283	0,282	cyclictest	32694	-21	kworker/u16:3+efi_rts_wq	23:55:12	3
1640	99	282	0,281	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	20:29:00	3
1640	99	282	0,281	cyclictest	10856	-21	kworker/u16:0+efi_rts_wq	23:35:14	3
1638	99	282	0,281	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	19:28:48	1
1637	99	281	0,280	cyclictest	1287	-21	kworker/u16:3+efi_rts_wq	21:55:11	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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