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글을 올려주셔서 감사합니다....................................... san2(at)linuxchannel.net

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닉네임 닉네임을 적어 주십시오. 이메일 옵션입니다. 홈페이지 홈페이지 URL(http:// 포함)을 적어 주십시오. 암   호 암호를 입력하셔야 수정, 삭제가 가능합니다. HTML 사용함 사용안함 HTML 코드 사용 여부 제   목 올릴자료 내   용 [산이]님이 남기신 글: >[linux] CPU 및 disk I/O 사용량 계산 > >Documentation/filesystems/proc.txt > >cat /proc/stat >cpu user system nice idle wait hi si zero >cpu 2255 34 2290 22625563 6290 127 456 0 >cpu0 1132 34 1441 11311718 3675 127 438 0 >cpu1 1123 0 849 11313845 2614 0 18 0 > >cputotal = user + system + nice + idle >user+system = user+system / cputotal > >/usr/src/linux-2.6.22.19/Documentation/iostats.txt > >cat /proc/diskstat >8 0 sda 1576985 366566 29817737 8671588 4847477 21489330 210704848 14116392 0 14120880 > >Field 1 -- # of reads issued > This is the total number of reads completed successfully. > >Field 2 -- # of reads merged, field 6 -- # of writes merged > Reads and writes which are adjacent to each other may be merged for > efficiency. Thus two 4K reads may become one 8K read before it is > ultimately handed to the disk, and so it will be counted (and queued) > as only one I/O. This field lets you know how often this was done. > >Field 3 -- # of sectors read > This is the total number of sectors read successfully. > >Field 4 -- # of milliseconds spent reading > This is the total number of milliseconds spent by all reads (as > measured from __make_request() to end_that_request_last()). > >Field 5 -- # of writes completed > This is the total number of writes completed successfully. > >Field 7 -- # of sectors written > This is the total number of sectors written successfully. > >Field 8 -- # of milliseconds spent writing > This is the total number of milliseconds spent by all writes (as > measured from __make_request() to end_that_request_last()). > >Field 9 -- # of I/Os currently in progress > The only field that should go to zero. Incremented as requests are > given to appropriate request_queue_t and decremented as they finish. > >Field 10 -- # of milliseconds spent doing I/Os > This field is increases so long as field 9 is nonzero. > >Field 11 -- weighted # of milliseconds spent doing I/Os > This field is incremented at each I/O start, I/O completion, I/O > merge, or read of these stats by the number of I/Os in progress > (field 9) times the number of milliseconds spent doing I/O since the > last update of this field. This can provide an easy measure of both > I/O completion time and the backlog that may be accumulating. ========================================

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