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2025-07-07 - 02:21

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, 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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  Intel
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 rack1slot6s.osadl.org (updated Mon Jul 07, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1423899915,39cyclictest0-21swapper/023:32:040
1423899894,38cyclictest0-21swapper/022:47:020
14238998720,14cyclictest0-21swapper/022:06:410
14238998129,9cyclictest0-21swapper/023:50:400
14238997829,9cyclictest0-21swapper/023:29:170
14243996333,12cyclictest0-21swapper/219:26:492
14243996333,12cyclictest0-21swapper/219:26:492
14244996236,14cyclictest0-21swapper/323:25:193
14243995932,12cyclictest0-21swapper/220:11:222
14243995932,12cyclictest0-21swapper/220:11:222
14243995931,13cyclictest0-21swapper/223:57:032
14238995931,11cyclictest0-21swapper/023:01:390
190222585,45sleep00-21swapper/019:47:120
14241995829,14cyclictest0-21swapper/121:31:531
14241995829,14cyclictest0-21swapper/121:31:531
29852575,44sleep00-21swapper/020:22:060
143812573,12sleep20-21swapper/220:46:592
143812573,12sleep20-21swapper/220:46:592
1424499564,46cyclictest0-21swapper/320:12:183
14244995611,38cyclictest0-21swapper/319:57:043
1424399553,13cyclictest0-21swapper/221:36:162
1424399553,13cyclictest0-21swapper/221:36:162
14241995530,20cyclictest2376-21cat20:21:471
14241995528,11cyclictest0-21swapper/119:22:221
14241995528,11cyclictest0-21swapper/119:22:221
14238995536,12cyclictest0-21swapper/019:57:020
123452556,41sleep312496-21df_abs18:27:073
79232543,45sleep10-21swapper/121:39:091
16832544,43sleep00-21swapper/022:32:440
1424499546,40cyclictest28480-21irqstats22:22:063
1424499545,42cyclictest5868-21memory22:42:073
1424499545,31cyclictest0-21swapper/321:42:173
1424499544,44cyclictest0-21swapper/323:02:143
1424499544,44cyclictest0-21swapper/323:02:143
1424499543,45cyclictest0-21swapper/319:42:093
1424499543,44cyclictest28561-21iostat_ios20:07:113
1424499543,44cyclictest28561-21iostat_ios20:07:113
1424499543,44cyclictest0-21swapper/318:47:033
14243995439,9cyclictest9661-21strings19:27:202
1424399543,34cyclictest0-21swapper/219:57:172
1424399543,13cyclictest0-21swapper/222:12:102
1424199544,12cyclictest1119-21munin-node19:12:151
1424199543,29cyclictest0-21swapper/123:22:101
14241995428,11cyclictest0-21swapper/118:42:141
14241995428,11cyclictest0-21swapper/118:42:141
14241995427,11cyclictest0-21swapper/121:52:101
14241995426,12cyclictest0-21swapper/123:41:521
14238995430,11cyclictest0-21swapper/022:37:150
90962533,9sleep30-21swapper/320:33:183
295262533,43sleep10-21swapper/120:09:461
295262533,43sleep10-21swapper/120:09:461
1424499535,41cyclictest8288-21munin-node23:57:103
1424499535,41cyclictest26090-21iostat_ios22:17:053
1424499535,41cyclictest26090-21iostat_ios22:17:053
1424499535,41cyclictest17988-21munin-node19:47:103
1424499534,43cyclictest0-21swapper/322:07:053
1424499533,43cyclictest0-21swapper/319:22:063
1424499533,43cyclictest0-21swapper/319:22:063
14244995322,25cyclictest13381-21switchtime22:57:093
1424199534,30cyclictest0-21swapper/123:27:011
1424199533,45cyclictest0-21swapper/122:26:571
14241995329,10cyclictest0-21swapper/121:26:591
14241995327,10cyclictest0-21swapper/120:27:001
14241995319,27cyclictest4591-21nscd21:46:421
14238995331,10cyclictest0-21swapper/021:17:100
91172522,9sleep30-21swapper/322:49:403
68692522,43sleep00-21swapper/022:46:300
319432524,41sleep00-21swapper/020:15:090
266282523,7sleep226720-21df_abs23:26:552
259992522,9sleep30-21swapper/321:10:543
163652522,43sleep00-21swapper/023:05:450
163652522,43sleep00-21swapper/023:05:450
1424499524,41cyclictest29582-21yum-updatesd-he22:27:023
1424499523,43cyclictest0-21swapper/323:42:053
1424499523,42cyclictest0-21swapper/323:11:403
1424399529,7cyclictest0-21swapper/222:11:412
14243995237,9cyclictest18653-21grep22:02:012
14243995237,9cyclictest1709-21grep23:41:572
1424399523,32cyclictest0-21swapper/219:56:462
1424199525,38cyclictest0-21swapper/121:46:571
14241995236,10cyclictest24469-21unixbench_multi19:57:221
14241995229,8cyclictest14181-21taskset20:46:451
14241995225,12cyclictest0-21swapper/121:02:161
14241995224,12cyclictest0-21swapper/122:46:541
14241995223,12cyclictest0-21swapper/122:11:411
14241995216,31cyclictest1265-21runrttasks23:37:571
14238995222,10cyclictest14236-21awk18:31:490
103252523,43sleep10-21swapper/119:28:221
59022513,41sleep05991-21aten2.4-expect23:51:510
54792512,9sleep30-21swapper/323:49:203
318832513,9sleep20-21swapper/220:14:222
153552515,39sleep00-21swapper/020:47:090
153552515,39sleep00-21swapper/020:47:090
1424499514,41cyclictest0-21swapper/322:01:553
1424499514,40cyclictest28792-21telnet23:31:493
1424499514,40cyclictest0-21swapper/321:22:053
1424499514,40cyclictest0-21swapper/320:57:153
1424499513,41cyclictest0-21swapper/318:37:073
1424499513,41cyclictest0-21swapper/318:37:073
14243995135,10cyclictest29295-21grep23:31:552
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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