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2026-09-01 - 04:04

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 Tue Sep 01, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
291989099111103,5cyclictest0-21swapper/200:10:012
2919889998748,34cyclictest2951552-21munin-plugin-st22:15:001
2919889997735,34cyclictest231ktimers/121:00:131
2919886997531,39cyclictest2936673-21dropbear20:45:220
2919889997467,4cyclictest231ktimers/119:35:001
2919889997234,32cyclictest0-21swapper/121:20:291
2919889997234,32cyclictest0-21swapper/121:20:281
291988699685,38cyclictest2967015-21rm23:45:020
2919890996761,4cyclictest311ktimers/219:15:192
2919889996728,29cyclictest0-21swapper/119:35:181
291989099666,52cyclictest32-21ksoftirqd/219:45:202
2919889996417,8cyclictest0-21swapper/119:15:181
2919889996328,30cyclictest0-21swapper/119:50:291
2919889996328,30cyclictest0-21swapper/119:50:291
2919889996224,33cyclictest2958291-21grep22:50:281
291988699625,27cyclictest0-21swapper/022:50:010
2919886996224,4cyclictest2968493-21/usr/sbin/munin23:50:280
2919886996214,45cyclictest0-21swapper/020:25:230
2919889996126,28cyclictest0-21swapper/120:25:201
2919889996122,4cyclictest0-21swapper/122:45:281
2919889996122,33cyclictest0-21swapper/120:50:221
2919889996118,10cyclictest0-21swapper/123:45:191
2919886996118,40cyclictest2947698-21if_eth121:50:220
2919889996024,26cyclictest0-21swapper/100:39:591
2919889996019,4cyclictest0-21swapper/123:05:011
2919889996019,4cyclictest0-21swapper/123:05:011
2919886996019,4cyclictest2945911-21ssh21:40:190
2919889995925,24cyclictest0-21swapper/121:25:281
2919889995924,6cyclictest2974667-21grep00:30:291
2919889995920,7cyclictest0-21swapper/121:05:281
2919889995920,6cyclictest0-21swapper/100:10:251
2919889995920,6cyclictest0-21swapper/100:10:251
2919889995919,33cyclictest0-21swapper/121:10:201
2919889995910,10cyclictest0-21swapper/121:40:011
2919886995922,34cyclictest0-21swapper/022:00:260
2919886995922,34cyclictest0-21swapper/022:00:250
2919886995920,3cyclictest2958080-21/usr/sbin/munin22:50:260
2919890995852,4cyclictest30-21rcuc/223:00:002
2919889995826,28cyclictest167450irq/126-8000000.ethernet-tx121:35:151
2919886995825,29cyclictest2923775-21df19:30:160
2919889995718,7cyclictest0-21swapper/121:55:311
291988699579,42cyclictest0-21swapper/020:55:010
291988699574,22cyclictest0-21swapper/023:50:020
2919886995716,38cyclictest2926543-21kernelversion19:45:230
2919886995713,41cyclictest1-21systemd00:08:150
2919886995642,10cyclictest2923084-21/usr/sbin/munin19:25:230
2919886995640,13cyclictest2953097-21/usr/sbin/munin22:20:290
2919886995635,3cyclictest2974209-21diskstats00:30:200
2919886995632,3cyclictest2973905-21sshd00:27:050
2919886995628,3cyclictest2944138-21df_inode21:30:190
2919886995625,7cyclictest2959455-21/usr/sbin/munin23:00:240
2919886995625,7cyclictest2959455-21/usr/sbin/munin23:00:240
2919886995537,12cyclictest0-21swapper/021:05:120
2919886995527,4cyclictest2955308-21fschecks_count22:35:190
2919886995527,3cyclictest2954686-21meminfo22:30:240
2919886995527,26cyclictest2940999-21memory21:10:230
2919886995520,32cyclictest2927292-21fschecks_time19:50:210
2919886995520,32cyclictest2927292-21fschecks_time19:50:210
2919890995433,14cyclictest311ktimers/221:15:122
2919889995416,7cyclictest0-21swapper/120:10:271
2919886995442,9cyclictest2943007-21users21:20:290
2919886995442,9cyclictest2943007-21users21:20:290
2919886995437,13cyclictest0-21swapper/022:15:150
2919886995436,13cyclictest0-21swapper/000:00:130
2919886995435,16cyclictest2956284-21/usr/sbin/munin22:40:210
2919886995434,16cyclictest2925922-21/usr/sbin/munin19:40:280
2919886995427,3cyclictest2950254-21fschecks_time22:05:230
2919886995426,3cyclictest2929695-21df_inode20:05:180
2919886995418,9cyclictest2921158-21memory19:15:060
2919889995317,5cyclictest0-21swapper/122:30:211
291988999531,26cyclictest0-21swapper/119:55:141
2919886995326,3cyclictest2970999-21irqstats00:10:180
2919886995326,3cyclictest2970999-21irqstats00:10:180
2919886995325,3cyclictest2934243-21memory20:30:240
2919886995325,3cyclictest2922103-21df_inode19:20:180
2919886995322,27cyclictest2975609-21cron00:40:000
2919886995321,8cyclictest2965425-21diskstats23:35:190
2919889995225,24cyclictest2947605-21fschecks_time21:50:211
2919889995223,4cyclictest0-21swapper/123:20:281
2919886995239,10cyclictest2945526-21sshd21:36:160
2919886995235,12cyclictest0-21swapper/020:15:130
2919886995233,14cyclictest0-21swapper/020:00:140
2919886995233,13cyclictest2954028-21/usr/sbin/munin22:25:270
2919886995232,15cyclictest0-21swapper/023:55:120
2919889995126,7cyclictest2947165-21grep21:45:271
2919889995119,7cyclictest0-21swapper/123:50:161
2919889995117,5cyclictest0-21swapper/120:55:311
291988699519,38cyclictest2943599-21ps21:25:270
2919886995143,4cyclictest2934783-21apt-get20:35:150
2919886995120,29cyclictest2928261-21phc2sys19:55:270
2919890995025,15cyclictest311ktimers/221:10:102
2919889995027,16cyclictest0-21swapper/119:45:211
2919886995027,3cyclictest2964814-21meminfo23:30:250
2919886995017,3cyclictest2958786-21fschecks_time22:55:210
2919889994940,5cyclictest0-21swapper/121:34:591
2919889994931,14cyclictest2961724-21grep23:10:271
291988999491,26cyclictest2969673-21/usr/sbin/munin00:00:251
2919889994910,7cyclictest0-21swapper/100:10:011
2919886994940,5cyclictest2924556-21apt-get19:35:160
2919886994932,13cyclictest0-21swapper/000:15:110
2919886994932,12cyclictest0-21swapper/021:15:130
2919886994923,22cyclictest1660-21snmpd20:56:010
2919886994921,25cyclictest2920263-21cat19:10:240
2919886994921,25cyclictest2920263-21cat19:10:230
2919890994835,7cyclictest167550irq/134-8000000.ethernet-tx222:25:012
2919889994826,16cyclictest0-21swapper/122:40:211
2919886994837,7cyclictest2960742-21/usr/sbin/munin23:05:270
2919886994821,4cyclictest2930576-21/usr/sbin/munin20:10:200
2919886994821,3cyclictest2961328-21ssh23:10:200
2919890994736,8cyclictest0-21swapper/223:05:012
2919890994736,8cyclictest0-21swapper/223:05:002
2919889994723,4cyclictest167450irq/126-8000000.ethernet-tx122:22:231
291988699478,36cyclictest0-21swapper/021:45:250
2919886994735,8cyclictest2950912-21/usr/sbin/munin22:10:130
2919886994732,12cyclictest2948725-21/usr/sbin/munin21:55:280
2919886994715,5cyclictest2932172-21apt20:20:120
2919889994637,5cyclictest0-21swapper/121:20:001
2919886994635,8cyclictest2972507-21/usr/sbin/munin00:20:170
2919886994632,10cyclictest2962964-21/usr/sbin/munin23:20:180
2919886994631,12cyclictest2939471-21/usr/sbin/munin21:00:280
2919886994629,13cyclictest2962057-21/usr/sbin/munin23:15:190
2919890994525,14cyclictest311ktimers/220:25:122
291988999457,15cyclictest2931897-21head20:15:291
2919886994538,4cyclictest2963993-21/usr/sbin/munin23:25:250
2919886994530,13cyclictest2935943-21memory20:40:270
2919886994530,13cyclictest2935943-21memory20:40:270
2919890994432,8cyclictest0-21swapper/219:34:592
2919890994430,5cyclictest0-21swapper/222:25:292
291988999442,19cyclictest2968986-21cut23:55:201
291988999441,4cyclictest0-21swapper/119:10:011
2919890994324,13cyclictest311ktimers/219:50:112
2919890994324,13cyclictest311ktimers/219:50:112
2919890994229,9cyclictest0-21swapper/220:50:282
2919890994226,11cyclictest0-21swapper/200:20:282
2919890994225,11cyclictest311ktimers/222:10:122
2919890994224,13cyclictest311ktimers/223:45:102
2919890994224,13cyclictest311ktimers/223:35:142
2919890994212,14cyclictest2919883-21cyclictest20:00:012
2919886994215,21cyclictest0-21swapper/019:10:010
2919890994136,3cyclictest0-21swapper/219:40:022
2919890994126,7cyclictest0-21swapper/200:35:302
2919890994126,11cyclictest311ktimers/220:20:142
2919889994122,13cyclictest0-21swapper/123:40:201
2919890994029,6cyclictest0-21swapper/200:15:272
291988999405,2cyclictest0-21swapper/123:10:001
2919889994027,8cyclictest0-21swapper/122:35:271
2919890993926,9cyclictest0-21swapper/220:55:332
2919890993924,10cyclictest311ktimers/223:50:132
2919890993922,13cyclictest311ktimers/220:15:152
2919890993921,13cyclictest0-21swapper/221:40:272
2919890993921,12cyclictest311ktimers/223:40:122
2919889993930,6cyclictest2932695-21grep20:20:291
2919889993921,5cyclictest2965350-21/usr/sbin/munin23:35:261
2919889993913,13cyclictest231ktimers/122:55:151
2919890993825,8cyclictest0-21swapper/222:50:192
2919889993830,5cyclictest0-21swapper/100:25:001
2919889993826,7cyclictest0-21swapper/120:40:311
2919889993826,7cyclictest0-21swapper/120:40:301
2919889993823,10cyclictest0-21swapper/120:00:331
2919890993733,2cyclictest0-21swapper/221:10:012
2919890993723,7cyclictest0-21swapper/220:35:212
2919889993729,6cyclictest2962532-21grep23:15:281
291988999371,4cyclictest0-21swapper/119:45:011
2919890993628,5cyclictest0-21swapper/219:10:292
2919890993628,5cyclictest0-21swapper/219:10:292
2919890993625,5cyclictest0-21swapper/200:00:282
2919890993618,13cyclictest311ktimers/221:50:122
291989099361,29cyclictest0-21swapper/219:25:152
291989099361,29cyclictest0-21swapper/219:20:202
2919889993620,8cyclictest0-21swapper/122:05:301
291989099359,15cyclictest14-21rcu_preempt23:30:012
2919890993523,4cyclictest0-21swapper/200:10:182
2919890993523,4cyclictest0-21swapper/200:10:182
2919890993522,8cyclictest2919883-21cyclictest23:15:292
2919890993519,8cyclictest0-21swapper/222:00:182
2919890993519,8cyclictest0-21swapper/222:00:182
2919889993522,9cyclictest2920609-21grep19:10:301
2919889993522,9cyclictest2920609-21grep19:10:291
2919890993427,4cyclictest167550irq/134-8000000.ethernet-tx219:55:152
2919890993426,4cyclictest0-21swapper/200:30:292
2919890993424,5cyclictest0-21swapper/220:05:282
2919890993422,6cyclictest2936478-21/usr/sbin/munin20:45:262
2919890993417,11cyclictest311ktimers/222:35:142
291989099341,28cyclictest0-21swapper/223:30:212
2919889993421,8cyclictest0-21swapper/120:45:291
2919889993416,10cyclictest231ktimers/120:30:061
291989099334,21cyclictest30-21rcuc/220:45:012
291989099334,21cyclictest30-21rcuc/220:45:012
2919890993325,5cyclictest0-21swapper/221:00:302
2919889993325,4cyclictest0-21swapper/119:20:261
2919890993222,7cyclictest30-21rcuc/222:05:152
2919890993219,9cyclictest2969520-21latency_hist00:00:012
2919890993123,4cyclictest0-21swapper/219:40:182
2919890993116,11cyclictest311ktimers/221:55:142
2919889993121,7cyclictest2972137-21grep00:15:281
2919889993116,11cyclictest0-21swapper/122:00:251
2919889993116,11cyclictest0-21swapper/122:00:251
2919890993025,3cyclictest0-21swapper/222:40:272
2919890993022,4cyclictest0-21swapper/221:25:282
2919889993018,8cyclictest2952390-21cron22:20:001
291988999301,26cyclictest2922873-21/usr/sbin/munin19:25:301
2919890992919,7cyclictest0-21swapper/221:30:292
291989099291,26cyclictest0-21swapper/222:15:232
2919889992916,9cyclictest0-21swapper/100:25:281
2919890992823,4cyclictest0-21swapper/220:30:172
2919890992819,7cyclictest2973284-21sshd00:25:152
2919890992819,5cyclictest0-21swapper/223:10:202
2919890992817,7cyclictest0-21swapper/221:45:212
2919890992815,9cyclictest0-21swapper/223:05:262
291988999281,25cyclictest0-21swapper/122:25:151
291989099278,14cyclictest311ktimers/221:20:132
291989099278,14cyclictest311ktimers/221:20:132
2919890992720,5cyclictest0-21swapper/221:35:262
2919890992720,3cyclictest0-21swapper/222:30:222
2919889992721,4cyclictest0-21swapper/120:35:241
2919889992718,6cyclictest2930170-21grep20:05:281
2919890992623,2cyclictest0-21swapper/220:10:182
2919890992621,4cyclictest0-21swapper/222:45:172
2919890992617,6cyclictest0-21swapper/223:20:272
291988999242,16cyclictest2964234-21grep23:25:281
2919890992215,5cyclictest30-21rcuc/219:10:002
2919889992115,3cyclictest2964998-21sendmail_mailtr23:30:291
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