1??top

top??????Linux?3???????????????????????????и?????????????????????????Windows???????????

????????????

????PID???????ID
????USER????????????
????PR???????????????С?????????
????NInice???
????VIRT?????????????????
????RES?????????????????
????SHR????????????????
????S???????????S????????R??????????У?Z???????????N????y?????????????
????%CPU?????????CPU???????
????%MEM???????????????????????????
????TIME+???y???????????????CPU????????CPU?????????????
????COMMAND?????????????????

?????????????

????P????%CPU?????????
????T????MITE+????
????M????%MEM????

????2??/proc/pid

?????????????????????棬linux???????????????????????/proc??????????????е????

?????????

????/proc/N pid?N????????
????/proc/N/cmdline ???????????
????/proc/N/cwd ?????????????????
????/proc/N/environ ????????????б?
????/proc/N/exe ????????????????????
????/proc/N/fd ???????????????е??????????
????/proc/N/maps ??????????????????
????/proc/N/mem ?????????е???棬?????
????/proc/N/root ?????????????
????/proc/N/stat ???????
????/proc/N/statm ??????????????
????/proc/N/status ?????????????stat/statm????????
????/proc/self ???????????????е????

????3??pmap