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2026-07-26 - 23:18

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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 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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot6s.osadl.org (updated Sun Jul 26, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
130690991002,13cyclictest175670-21/usr/sbin/munin11:30:182
130690998915,20cyclictest157293-21apt-get09:45:032
130686998275,5cyclictest131ktimers/008:00:200
130690997669,5cyclictest311ktimers/210:35:012
130690996627,33cyclictest0-21swapper/208:45:272
130688996612,32cyclictest22-21rcuc/111:50:011
130690996527,30cyclictest170212-21grep10:55:302
130688996531,17cyclictest22-21rcuc/112:30:011
130690996415,6cyclictest0-21swapper/211:45:022
130690996321,4cyclictest0-21swapper/207:35:292
13068699635,36cyclictest20850irq/208-8000000.ethernet08:20:010
130686996251,7cyclictest0-21swapper/007:10:110
130686996251,7cyclictest0-21swapper/007:10:110
130690996015,7cyclictest0-21swapper/207:35:002
13068699601,7cyclictest0-21swapper/007:50:190
130690995725,27cyclictest0-21swapper/212:20:282
130690995718,4cyclictest0-21swapper/212:05:212
13069099567,10cyclictest154666-21apt-get09:30:012
130690995627,24cyclictest145273-21grep08:30:312
130690995617,9cyclictest0-21swapper/210:15:262
130688995640,11cyclictest231ktimers/109:45:111
130690995525,4cyclictest0-21swapper/208:10:172
130690995523,5cyclictest0-21swapper/210:25:272
130686995549,3cyclictest0-21swapper/010:15:110
130690995440,10cyclictest0-21swapper/211:55:272
130690995440,10cyclictest0-21swapper/211:55:272
130690995416,12cyclictest167981-21/usr/sbin/munin10:45:172
13069099541,46cyclictest0-21swapper/208:25:282
13069099541,28cyclictest186508-21sshd12:31:282
13068699543,5cyclictest134704-21fschecks_time07:30:190
13068699541,4cyclictest0-21swapper/008:40:170
13068699531,10cyclictest0-21swapper/007:10:000
130690995220,27cyclictest0-21swapper/209:35:272
130690995213,7cyclictest0-21swapper/211:55:012
130688995243,6cyclictest159912-21munin-plugin-st09:59:591
130688995231,15cyclictest231ktimers/111:55:121
130688995231,15cyclictest231ktimers/111:55:121
130690995116,6cyclictest0-21swapper/209:50:192
130690995116,6cyclictest0-21swapper/209:50:192
13069099511,26cyclictest151265-21users09:05:272
130690995011,10cyclictest0-21swapper/210:40:202
130688995021,15cyclictest231ktimers/110:50:121
130688995021,15cyclictest231ktimers/110:50:121
130686995043,4cyclictest167350irq/118-8000000.ethernet-tx012:10:010
13068699501,46cyclictest0-21swapper/009:20:210
13069099491,5cyclictest169263-21sshd10:50:272
13069099491,5cyclictest169263-21sshd10:50:272
13068899496,4cyclictest135304-21gpgv07:35:011
130688994930,15cyclictest231ktimers/111:00:121
130688994930,15cyclictest231ktimers/111:00:121
130686994938,3cyclictest135563-21fschecks_count07:35:200
130690994833,11cyclictest0-21swapper/211:39:592
130690994823,3cyclictest164236-21apt-key10:25:022
130690994821,4cyclictest311ktimers/207:25:122
130690994817,9cyclictest185730-21cp12:30:022
130690994817,4cyclictest0-21swapper/207:50:012
130688994735,8cyclictest132580-21grep07:15:281
130690994626,16cyclictest0-21swapper/208:40:262
130690994623,4cyclictest143648-21head08:20:292
130690994623,4cyclictest143648-21head08:20:282
13069099462,12cyclictest152935-21head09:15:292
130690994617,8cyclictest0-21swapper/208:00:002
130688994635,8cyclictest0-21swapper/110:45:001
130688994628,13cyclictest231ktimers/111:40:121
130686994639,4cyclictest20650irq/252-8000000.ethernet09:50:240
130686994639,4cyclictest20650irq/252-8000000.ethernet09:50:240
130686994635,5cyclictest171388-21latency_hist11:05:010
130686994635,5cyclictest171388-21latency_hist11:05:010
130686994635,5cyclictest0-21swapper/009:55:210
130686994633,8cyclictest0-21swapper/010:50:300
130686994633,8cyclictest0-21swapper/010:50:300
13068699462,5cyclictest166837-21munin-run10:40:000
13069099453,21cyclictest153190-21/usr/sbin/munin09:20:182
130690994523,4cyclictest0-21swapper/211:05:272
130690994519,7cyclictest311ktimers/209:55:192
130690994515,7cyclictest0-21swapper/208:35:292
130688994529,12cyclictest231ktimers/111:25:151
130686994537,5cyclictest152981-21sendmail09:20:000
130686994533,6cyclictest0-21swapper/009:30:010
130686994530,10cyclictest0-21swapper/011:50:280
13068699452,41cyclictest0-21swapper/010:55:140
13068699451,42cyclictest0-21swapper/008:05:150
130690994431,9cyclictest0-21swapper/210:05:262
130688994424,16cyclictest231ktimers/107:45:111
13068699444,8cyclictest185602-21apt-get12:30:010
130686994441,2cyclictest0-21swapper/011:05:110
130686994437,4cyclictest130680-21cyclictest11:45:000
13068899431,8cyclictest0-21swapper/112:15:011
130686994335,4cyclictest167350irq/118-8000000.ethernet-tx011:10:270
130686994316,25cyclictest131ktimers/012:20:010
130690994232,7cyclictest149606-21sendmail09:00:002
13068899427,29cyclictest22-21rcuc/109:10:241
13068899427,15cyclictest137984-21/usr/sbin/munin07:50:191
130688994234,4cyclictest148292-21sh08:50:201
130688994233,5cyclictest0-21swapper/109:50:261
130688994233,5cyclictest0-21swapper/109:50:261
130688994231,7cyclictest136634-21phc2sys07:40:261
130688994231,7cyclictest136634-21phc2sys07:40:261
130688994231,4cyclictest0-21swapper/108:45:271
130688994230,8cyclictest0-21swapper/110:05:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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