Linux??clock?????????
???????????? ???????[ 2016/2/18 16:32:38 ] ??????????????
????3. ?????????????????”????“????
?????????????????????????????Ч?????????????????????????μ?????
????3.1 ??????
????????????????clock??????????????????????????????????cpu?????????????????????cpu????????????
??????clock????????????????????′ε???clock??????????cpu???????????????????????cpu?????С????????????
????????????????????cpu???????????????????????????ж???д?????????
????3.2 ????????
???????????time???????????????clock????????????ò??????????CPU???+??CPU???????????????????ζ???????
??????????????????????????????Σ???????????????
????system("cd");
?????????????????????????У????????????????????????????
????????shell????
????time ./test
??????????
????Time to do 1000 empty loops is 0.010000 seconds
????real 0m3.492s
????user 0m0.512s
????sys 0m2.972s
????????????????clock????????п???CPU???????????????
????3.3 ????????
???????????????????Real time?? User time??Sys time??real time > user time + sys time ???????????????
?????????????????????м?????????λ???????????????????
????Real????????????????User??Sys?????y???????CPU???
????1. Real????????(wall clock time)?????????????????????????????????????????????????????????????????????????I/O??????
????2. User??????????????????????????????????????д??????????????CPU????????????????????????????????????
????3. Sys????????????????CPU?????????????????????????CPU???
??????????????????????????????????????????????????????????????(user time + sys time)С???
????User+Sys??????????????CPU????????????????????????????ж?????????ж????????????У????????Real time??CPU time??User + Sys time???С????????????????
???????????????????????漰???????????????????SPASVOС??(021-61079698-8054)?????????????????????????
??????
Linux??????DDR????????????Linux?????????????????豸??????????linux???в???????????м??????????????????????????Linux????Linux??DNS????????????γ???????????Linux?????????????Linux????(???)????????Linux ????????????????????????????????Windows???У?Linux???????Linux????????????????Linux iommu??vfio???????Linux????ε???TCP???????Linux?????????????СLinux?·???????????Linux???Jexus?й?Asp.Net Core??ó???Linux?????????Щ??
???·???
??????????????????
2023/3/23 14:23:39???д?ò??????????
2023/3/22 16:17:39????????????????????Щ??
2022/6/14 16:14:27??????????????????????????
2021/10/18 15:37:44???????????????
2021/9/17 15:19:29???·???????·
2021/9/14 15:42:25?????????????
2021/5/28 17:25:47??????APP??????????
2021/5/8 17:01:11????????
?????????App Bug???????????????????????Jmeter?????????QC??????APP????????????????app?????е????????jenkins+testng+ant+webdriver??????????????JMeter????HTTP???????Selenium 2.0 WebDriver ??????