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2026-06-25 - 19:48

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 Thu Jun 25, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21372509910089,8cyclictest20850irq/208-8000000.ethernet08:50:120
2137250997362,3cyclictest0-21swapper/010:50:110
2137252996043,11cyclictest2145429-21sh07:55:011
2137254995649,4cyclictest2170027-21sendmail10:20:002
2137252995420,16cyclictest231ktimers/107:10:151
213725099521,4cyclictest0-21swapper/007:55:020
213725499501,2cyclictest0-21swapper/210:35:022
2137252995032,12cyclictest0-21swapper/108:30:291
213725099503,3cyclictest2167350-21mailstats10:00:280
213725099502,17cyclictest20850irq/208-8000000.ethernet12:35:020
213725099501,2cyclictest0-21swapper/012:40:000
2137250994932,15cyclictest167350irq/118-8000000.ethernet-tx012:10:200
2137250994913,12cyclictest2140208-21gpgv07:25:010
213725499480,25cyclictest311ktimers/211:40:002
2137252994839,5cyclictest2171804-21munin-plugin-st10:30:001
2137250994842,3cyclictest167350irq/118-8000000.ethernet-tx009:30:120
2137250994840,4cyclictest2183643-21unixbench_singl11:35:280
2137250994837,7cyclictest2170993-21latency_hist10:25:010
2137254994738,5cyclictest47-21kauditd11:20:002
2137254994731,8cyclictest0-21swapper/210:40:282
2137252994731,11cyclictest0-21swapper/108:35:201
213725099478,3cyclictest0-21swapper/011:50:010
2137250994740,5cyclictest2164961-21munin-plugin-st09:49:590
213725099471,44cyclictest0-21swapper/007:40:130
213725099471,44cyclictest0-21swapper/007:40:130
2137252994634,7cyclictest2150469-21grep08:20:281
2137250994641,3cyclictest2184557-21munin-plugin-st11:45:000
2137250994622,16cyclictest0-21swapper/008:25:000
213725099461,2cyclictest0-21swapper/007:45:100
2137254994533,7cyclictest2137369-21apt-key07:10:012
2137252994537,5cyclictest2157198-21unixbench_singl09:00:281
2137252994535,6cyclictest231ktimers/112:10:101
2137252994530,8cyclictest0-21swapper/111:40:011
2137252994525,14cyclictest231ktimers/109:45:111
2137250994530,9cyclictest0-21swapper/009:40:010
213725099452,40cyclictest2147884-21grep08:05:280
2137250994514,15cyclictest2190675-21/usr/sbin/munin12:20:190
213725099451,30cyclictest0-21swapper/009:45:020
213725099451,30cyclictest0-21swapper/009:45:020
213725099451,2cyclictest0-21swapper/007:10:000
2137254994433,7cyclictest0-21swapper/212:35:282
2137252994434,5cyclictest2184487-21grep11:40:271
213725099442,4cyclictest2168257-21grep10:05:270
213725099442,40cyclictest0-21swapper/010:40:160
213725099441,40cyclictest2141732-21ps07:30:270
213725099441,40cyclictest2141732-21ps07:30:270
213725499434,29cyclictest30-21rcuc/207:55:012
2137254994332,8cyclictest0-21swapper/210:25:282
2137254994332,8cyclictest0-21swapper/209:10:002
2137254994331,8cyclictest0-21swapper/208:10:292
2137254994328,10cyclictest0-21swapper/212:00:282
2137254994328,10cyclictest0-21swapper/212:00:282
2137254994327,9cyclictest0-21swapper/207:15:012
2137254994322,15cyclictest0-21swapper/211:55:302
213725499431,8cyclictest0-21swapper/210:45:192
213725499431,8cyclictest0-21swapper/210:45:182
2137252994331,6cyclictest2180252-21grep11:15:281
2137252994329,9cyclictest0-21swapper/108:00:191
2137252994325,10cyclictest0-21swapper/112:20:011
2137252994324,13cyclictest0-21swapper/110:35:251
2137250994337,4cyclictest167350irq/118-8000000.ethernet-tx010:30:190
213725099432,5cyclictest2179985-21memory11:15:230
213725099431,5cyclictest2171814-21ls10:30:000
213725099431,38cyclictest0-21swapper/008:50:020
2137252994233,4cyclictest0-21swapper/112:35:281
2137252994232,6cyclictest2158011-21grep09:05:301
2137252994228,9cyclictest0-21swapper/107:40:301
2137252994228,9cyclictest0-21swapper/107:40:301
2137252994226,12cyclictest231ktimers/110:15:111
2137252994222,11cyclictest0-21swapper/109:40:191
2137252994222,11cyclictest0-21swapper/109:40:191
213725099422,5cyclictest2152654-21irqstats08:35:230
213725099422,4cyclictest2176898-21sed11:00:010
2137250994224,15cyclictest2158082-21users09:05:310
2137254994130,7cyclictest2152139-21unixbench_singl08:30:282
2137254994125,12cyclictest0-21swapper/212:20:292
2137252994126,11cyclictest0-21swapper/107:35:231
2137252994125,8cyclictest0-21swapper/110:20:291
2137252994125,10cyclictest2146275-21sendmail08:00:001
2137250994136,4cyclictest0-21swapper/010:35:090
2137250994135,3cyclictest20650irq/252-8000000.ethernet09:20:110
2137250994133,5cyclictest0-21swapper/011:02:110
213725099412,3cyclictest2190115-21meminfo12:15:260
213725099411,6cyclictest0-21swapper/010:00:010
213725099411,38cyclictest0-21swapper/012:00:180
213725099411,38cyclictest0-21swapper/012:00:180
2137254994030,5cyclictest0-21swapper/212:10:272
2137254994027,8cyclictest0-21swapper/211:50:302
2137254994027,8cyclictest0-21swapper/209:15:292
2137254994025,10cyclictest0-21swapper/211:30:252
2137252994031,4cyclictest2181970-21grep11:25:291
2137252994029,5cyclictest0-21swapper/111:10:191
2137252994022,9cyclictest0-21swapper/109:50:201
213725099402,4cyclictest2145704-21df_inode07:55:180
2137250994024,14cyclictest2153930-21sed08:45:010
213725099401,4cyclictest2180770-21if_eth011:20:220
213725099401,3cyclictest2138127-21apt-get07:15:060
213725099401,37cyclictest0-21swapper/008:10:250
213725099401,36cyclictest2191583-21/usr/sbin/munin12:25:170
2137254993935,2cyclictest0-21swapper/207:40:202
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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