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2026-08-04 - 23:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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.

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 100 highest latencies:
System rack4slot1s.osadl.org (updated Tue Aug 04, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33442990,2sleep30-21swapper/311:54:033
33442990,2sleep30-21swapper/311:54:033
286082920,2sleep30-21swapper/308:43:533
286082920,2sleep30-21swapper/308:43:533
44782870,2chrt0-21swapper/309:04:033
195292760,2sleep019534-21if_err_eth012:38:550
195292760,2sleep019534-21if_err_eth012:38:550
246612750,3sleep20-21swapper/209:58:572
246612750,3sleep20-21swapper/209:58:572
246612750,3sleep20-21swapper/209:58:572
299192740,2chrt29920-21gunzip11:39:021
299192740,2chrt29920-21gunzip11:39:021
123782650,2sleep112375-21tune2fs10:53:511
123782650,2sleep112375-21tune2fs10:53:511
49682620,3sleep30-21swapper/310:33:513
49682620,3sleep30-21swapper/310:33:513
142602610,3chrt0-21swapper/009:31:010
142602610,3chrt0-21swapper/009:31:010
244112590,3sleep0171ktimers/008:33:420
137692560,2sleep30-21swapper/309:29:033
137692560,2sleep30-21swapper/309:29:033
258482530,2chrt351rcuc/208:34:032
258482530,2chrt351rcuc/208:34:032
169912510,3sleep30-21swapper/311:04:023
79172500,3sleep00-21swapper/009:14:010
79172500,3sleep00-21swapper/009:14:010
157682500,2chrt0-21swapper/208:08:542
157682500,2chrt0-21swapper/208:08:542
222832490,3chrt0-21swapper/311:18:583
222832490,3chrt0-21swapper/311:18:583
272392480,2sleep00-21swapper/011:33:500
272392480,2sleep00-21swapper/011:33:500
10802450,4chrt0-21swapper/311:48:573
10802450,4chrt0-21swapper/311:48:573
7102420,3sleep30-21swapper/307:28:553
7102420,3sleep30-21swapper/307:28:553
79382410,3chrt0-21swapper/312:08:513
79382410,3chrt0-21swapper/312:08:513
2733099401,10cyclictest10914-21sort10:48:550
324562390,3sleep30-21swapper/308:53:543
2733099391,6cyclictest23064-21taskset11:21:430
2733099391,6cyclictest23064-21taskset11:21:430
86732380,2sleep00-21swapper/012:09:000
86732380,2sleep00-21swapper/012:09:000
2733099388,28cyclictest9934-21systemctl09:19:010
2733099388,28cyclictest9934-21systemctl09:19:010
2733099381,5cyclictest4126-21cut07:38:530
2733099381,5cyclictest4126-21cut07:38:530
307992370,8sleep130803-21unixbench-2d10:14:041
307992370,8sleep130803-21unixbench-2d10:14:041
2733099378,26cyclictest0-21swapper/011:08:540
2733099378,26cyclictest0-21swapper/011:08:540
2733099371,9cyclictest11229-21gltestperf09:23:530
2733099371,9cyclictest11229-21gltestperf09:23:530
2733099371,6cyclictest28356-21/usr/sbin/munin08:44:010
2733099371,6cyclictest28356-21/usr/sbin/munin08:44:010
27330993711,24cyclictest20506-21sshd08:22:080
27330993711,24cyclictest20506-21sshd08:22:080
193472370,3chrt0-21swapper/209:44:022
193472370,3chrt0-21swapper/209:44:022
2733099361,6cyclictest6100-21fschecks_time07:43:540
2733099361,6cyclictest6100-21fschecks_time07:43:540
13922360,4sleep20-21swapper/210:23:532
13922360,4sleep20-21swapper/210:23:532
33612350,2sleep13363-21latency_hist09:03:491
33612350,2sleep13363-21latency_hist09:03:491
2733099351,9cyclictest23337-21grep09:54:040
2733099351,9cyclictest23337-21grep09:54:040
2733099351,9cyclictest18973-21cat08:18:470
2733099351,7cyclictest16287-21taskset09:38:080
2733099351,7cyclictest16287-21taskset09:38:080
2733099351,7cyclictest16033-21open_inodes08:08:590
2733099351,7cyclictest16033-21open_inodes08:08:590
2733099351,6cyclictest1409-21cat11:49:010
2733099351,6cyclictest1409-21cat11:49:010
2733099351,10cyclictest7722-21latency_hist12:08:420
2733099351,10cyclictest7722-21latency_hist12:08:420
2733099351,10cyclictest3907-21cat11:58:410
2733099351,10cyclictest3907-21cat11:58:410
37262340,3sleep20-21swapper/211:56:442
37262340,3sleep20-21swapper/211:56:442
27341993428,5cyclictest31622-21needreboot11:44:001
27341993428,5cyclictest31622-21needreboot11:44:001
27341993426,6cyclictest28046-21processes11:34:001
27341993426,6cyclictest28046-21processes11:34:001
27341993425,7cyclictest15633-21swap09:34:011
27341993425,7cyclictest15633-21swap09:34:011
2733099348,24cyclictest0-21swapper/008:38:500
2733099348,24cyclictest0-21swapper/008:38:500
2733099342,9cyclictest749-21runrttasks12:03:160
2733099342,9cyclictest749-21runrttasks12:03:160
2733099341,8cyclictest15949-21/usr/sbin/munin11:04:030
2733099341,8cyclictest12376-21/usr/sbin/munin12:18:570
2733099341,8cyclictest12376-21/usr/sbin/munin12:18:570
2733099341,8cyclictest12376-21/usr/sbin/munin12:18:570
2733099341,7cyclictest988-21cpuspeed10:23:510
2733099341,7cyclictest988-21cpuspeed10:23:510
2733099341,7cyclictest28032-21fschecks_time10:08:510
2733099341,7cyclictest26865-21taskset11:32:250
2733099341,7cyclictest24950-21grep09:59:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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