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
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 50 highest latencies:

System rackcslot3s.osadl.org (updated Sat Mar 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
25072	2	326	319,5	sleep2	0	-21	swapper/2	07:06:08	2
25356	2	322	307,5	sleep1	0	-21	swapper/1	07:09:47	1
25073	2	322	314,5	sleep3	0	-21	swapper/3	07:06:09	3
25639	99	315	0,314	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	10:18:13	3
25639	99	314	0,313	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	10:20:16	3
25639	99	314	0,313	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	10:20:16	3
25639	99	314	0,313	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	11:15:13	3
25636	99	314	0,313	cyclictest	31084	-21	kworker/u16:3+efi_rts_wq	12:05:12	0
25013	2	314	306,5	sleep0	0	-21	swapper/0	07:05:22	0
25637	99	311	0,308	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	11:20:12	1
25636	99	310	0,309	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	10:28:15	0
25639	99	309	0,308	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	08:25:10	3
25638	99	309	0,308	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	08:45:12	2
25637	99	309	0,308	cyclictest	31084	-21	kworker/u16:3+efi_rts_wq	11:53:30	1
25638	99	308	0,307	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	09:33:05	2
25636	99	308	0,307	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	12:15:14	0
25639	99	307	0,306	cyclictest	5035	-21	kworker/u16:1+efi_rts_wq	11:03:21	3
25637	99	306	0,305	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	09:35:11	1
25637	99	304	0,303	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	08:10:15	1
25639	99	303	0,302	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	09:20:13	3
25636	99	303	0,302	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	07:45:10	0
25636	99	301	0,300	cyclictest	21776	-21	kworker/u16:2+efi_rts_wq	07:25:14	0
25639	99	300	0,299	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	09:15:14	3
25639	99	298	0,297	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	08:45:12	3
25637	99	298	0,297	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	09:05:13	1
25637	99	297	0,296	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	09:00:13	1
25639	99	296	0,295	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	07:35:12	3
25639	99	296	0,295	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	07:30:15	3
25639	99	295	0,294	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	11:25:13	3
25639	99	295	0,292	cyclictest	31084	-21	kworker/u16:3+efi_rts_wq	12:25:12	3
25637	99	295	0,294	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	08:37:54	1
25636	99	295	0,294	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	09:25:10	0
25638	99	294	0,293	cyclictest	31084	-21	kworker/u16:3+efi_rts_wq	12:10:11	2
25637	99	293	0,292	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	08:30:14	1
25639	99	292	0,291	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	12:35:14	3
25639	99	292	0,291	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	08:32:53	3
25638	99	291	0,290	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	08:35:13	2
25638	99	291	0,289	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	10:10:13	2
25636	99	290	0,289	cyclictest	31084	-21	kworker/u16:3+efi_rts_wq	12:30:13	0
25636	99	290	0,289	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	11:20:13	0
25638	99	289	0,288	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	10:35:12	2
25636	99	287	0,286	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	10:03:11	0
25636	99	286	0,285	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	10:08:12	0
25636	99	286	0,285	cyclictest	12368	-21	kworker/u16:0+efi_rts_wq	09:50:11	0
25638	99	284	0,283	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	07:35:12	2
25636	99	284	0,283	cyclictest	21776	-21	kworker/u16:2+efi_rts_wq	07:50:14	0
25639	99	282	0,281	cyclictest	5035	-21	kworker/u16:1+efi_rts_wq	11:50:12	3
25639	99	279	0,278	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	09:07:59	3
25637	99	279	0,278	cyclictest	23795	-21	kworker/u16:3+efi_rts_wq	10:43:18	1
25638	99	278	0,277	cyclictest	5035	-21	kworker/u16:1+efi_rts_wq	11:05:14	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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