You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2022-10-04 - 02:59

x86 Intel Core i5-6440EQ @2700 MHz, Linux 4.9.47-rt37 (Profile)

Latency plot of system in rack #5, slot #2
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack5slot2.osadl.org (updated Mon Oct 03, 2022 12:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
250182200184,11sleep10-21swapper/107:06:561
250982199166,28sleep00-21swapper/007:07:560
251412188171,12sleep30-21swapper/307:08:313
252562183166,13sleep20-21swapper/207:09:582
228832480,0sleep00-21swapper/009:10:220
146112460,0sleep10-21swapper/110:25:181
149502450,0sleep214952-21latency11:45:222
212312230,0sleep3381rcuc/311:49:553
293572110,0sleep10-21swapper/110:34:501
246322110,0sleep1211ktimersoftd/110:10:561
268822100,0sleep30-21swapper/310:12:463
256302100,0sleep10-21swapper/110:51:511
2548099106,4cyclictest5914-21apt-get09:40:193
2548099104,3cyclictest5650-21date11:20:003
2548099103,3cyclictest31946-21sed09:35:263
2548099103,3cyclictest27618-21cut08:15:213
186942100,0sleep00-21swapper/012:07:500
254809994,2cyclictest28963-21cat08:20:163
254809993,4cyclictest26531-21rm10:52:363
254809993,4cyclictest21292-21diskmemload12:33:183
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional