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2026-06-26 - 00:30

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 792 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
2137254993935,2cyclictest0-21swapper/207:40:202
2137254993930,5cyclictest0-21swapper/208:35:272
2137254993928,7cyclictest0-21swapper/210:50:272
2137254993927,8cyclictest311ktimers/209:25:122
2137254993926,8cyclictest0-21swapper/210:20:302
2137254993924,11cyclictest0-21swapper/210:04:592
2137254993913,15cyclictest2184757-21/usr/sbin/munin11:45:182
2137254993913,15cyclictest2181381-21/usr/sbin/munin11:25:192
2137252993925,9cyclictest231ktimers/107:15:121
2137252993923,9cyclictest2185282-21grep11:45:271
2137252993923,5cyclictest0-21swapper/109:40:001
2137252993923,11cyclictest231ktimers/110:10:151
2137252993921,14cyclictest231ktimers/109:30:121
2137250993925,10cyclictest0-21swapper/008:25:280
213725099391,8cyclictest2187079-21munin-plugin-st11:59:590
213725099391,4cyclictest0-21swapper/007:10:290
213725099391,36cyclictest0-21swapper/009:00:210
2137254993830,4cyclictest0-21swapper/209:40:062
2137254993830,4cyclictest0-21swapper/209:40:062
2137254993829,5cyclictest0-21swapper/207:20:272
2137254993826,8cyclictest311ktimers/208:45:112
2137254993825,9cyclictest311ktimers/210:05:122
2137254993824,11cyclictest311ktimers/212:05:142
2137254993824,10cyclictest0-21swapper/212:15:272
213725499381,20cyclictest2147331-21/usr/sbin/munin08:05:192
213725299389,6cyclictest0-21swapper/112:25:011
213725299384,8cyclictest0-21swapper/107:10:011
2137252993830,5cyclictest167450irq/126-8000000.ethernet-tx107:45:131
2137250993833,4cyclictest131ktimers/009:25:200
2137250993831,4cyclictest0-21swapper/009:51:080
2137250993829,6cyclictest0-21swapper/008:30:110
2137250993828,7cyclictest0-21swapper/010:45:270
2137250993828,7cyclictest0-21swapper/010:45:270
213725099382,33cyclictest2169471-21fschecks_count10:15:190
213725099381,35cyclictest0-21swapper/011:10:280
2137254993726,8cyclictest311ktimers/211:40:142
2137254993726,8cyclictest0-21swapper/207:40:002
2137254993725,8cyclictest2138540-21sshd07:15:042
213725499371,19cyclictest30-21rcuc/208:05:002
2137252993728,5cyclictest2151262-21grep08:25:301
2137252993727,6cyclictest1261-21rs:main1
2137252993727,6cyclictest1261-21rs:main1
2137252993723,8cyclictest0-21swapper/107:25:011
2137252993711,21cyclictest2149012-21/usr/sbin/munin08:15:201
2137252993711,21cyclictest2149012-21/usr/sbin/munin08:15:191
213725099371,34cyclictest0-21swapper/010:10:150
2137254993628,5cyclictest0-21swapper/211:05:272
2137254993626,7cyclictest0-21swapper/209:45:282
2137254993623,8cyclictest0-21swapper/208:25:302
2137254993621,8cyclictest2155517-21grep08:50:312
213725299363,28cyclictest2161384-21unixbench_multi09:25:291
2137252993626,6cyclictest2178593-21grep11:05:271
213725099361,3cyclictest0-21swapper/007:25:200
213725099361,33cyclictest0-21swapper/011:28:030
213725099361,33cyclictest0-21swapper/009:10:460
213725099361,33cyclictest0-21swapper/007:35:110
213725099361,30cyclictest2182592-21wc11:30:270
213725099361,2cyclictest0-21swapper/012:05:280
2137254993528,4cyclictest0-21swapper/209:00:282
2137254993525,7cyclictest0-21swapper/208:15:292
2137254993525,7cyclictest0-21swapper/208:15:292
2137254993525,6cyclictest0-21swapper/212:30:272
2137254993525,6cyclictest0-21swapper/208:55:302
2137254993522,9cyclictest0-21swapper/210:10:192
213725299356,25cyclictest22-21rcuc/112:30:001
213725299355,4cyclictest0-21swapper/110:50:011
213725299355,4cyclictest0-21swapper/110:50:011
2137252993525,5cyclictest0-21swapper/109:15:291
2137252993523,6cyclictest0-21swapper/110:30:291
2137252993520,10cyclictest0-21swapper/111:55:021
2137252993519,11cyclictest0-21swapper/108:10:011
2137252993518,8cyclictest0-21swapper/108:50:281
213725299351,7cyclictest0-21swapper/110:05:011
213725299351,2cyclictest0-21swapper/108:45:011
2137250993529,3cyclictest0-21swapper/008:00:130
213725099351,3cyclictest0-21swapper/011:50:460
213725099351,31cyclictest0-21swapper/011:05:110
2137254993424,7cyclictest0-21swapper/212:25:292
2137254993424,7cyclictest0-21swapper/207:45:212
213725499341,31cyclictest30-21rcuc/209:10:232
2137252993423,5cyclictest0-21swapper/110:05:271
2137252993420,10cyclictest0-21swapper/110:50:281
213725299341,6cyclictest0-21swapper/108:15:001
213725299341,5cyclictest2176479-21irqstats10:55:241
2137250993429,3cyclictest20850irq/208-8000000.ethernet09:15:210
2137254993322,7cyclictest0-21swapper/211:10:282
2137254993322,7cyclictest0-21swapper/207:30:282
2137254993322,7cyclictest0-21swapper/207:30:272
2137254993319,9cyclictest2150477-21grep08:20:282
213725499331,5cyclictest2161950-21irqstats09:30:222
2137252993321,8cyclictest0-21swapper/108:55:291
2137252993321,7cyclictest0-21swapper/109:55:201
2137252993320,8cyclictest0-21swapper/112:00:191
2137252993320,8cyclictest0-21swapper/112:00:191
2137252993318,10cyclictest0-21swapper/110:40:191
2137254993226,4cyclictest167550irq/134-8000000.ethernet-tx208:40:282
2137254993223,6cyclictest0-21swapper/209:50:282
2137254993222,7cyclictest0-21swapper/210:55:302
2137254993218,10cyclictest0-21swapper/209:55:272
2137252993222,8cyclictest2188134-21/usr/sbin/munin12:05:161
2137252993221,6cyclictest2180542-21/usr/sbin/munin11:20:221
2137250993226,4cyclictest20850irq/208-8000000.ethernet08:55:190
2137250993225,5cyclictest20850irq/208-8000000.ethernet08:15:130
2137250993225,5cyclictest20850irq/208-8000000.ethernet08:15:130
2137254993125,4cyclictest2163174-21latency_hist09:40:002
213725299313,20cyclictest2192890-21sed12:30:271
2137252993119,8cyclictest2141062-21grep07:25:281
2137254993021,4cyclictest0-21swapper/209:25:012
2137254993020,5cyclictest0-21swapper/211:20:252
2137254993019,8cyclictest0-21swapper/207:25:202
2137252993022,6cyclictest2187058-21sshd11:57:111
2137254992920,6cyclictest0-21swapper/207:55:282
2137252992920,5cyclictest0-21swapper/111:00:201
2137252992914,10cyclictest0-21swapper/111:30:291
213725299282,23cyclictest0-21swapper/109:21:371
2137252992816,8cyclictest231ktimers/108:45:201
2137254992714,8cyclictest311ktimers/210:30:122
2137254992611,8cyclictest47-21kauditd11:00:022
213725299265,12cyclictest2158908-21sed09:10:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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