{"id":455,"date":"2016-09-01T21:41:58","date_gmt":"2016-09-01T13:41:58","guid":{"rendered":"http:\/\/www.5x44.cn\/?p=455"},"modified":"2016-12-01T15:27:19","modified_gmt":"2016-12-01T07:27:19","slug":"%e8%bf%9b%e7%a8%8b%e6%97%b6%e9%97%b4","status":"publish","type":"post","link":"https:\/\/www.5x44.cn\/?p=455","title":{"rendered":"\u8fdb\u7a0b\u65f6\u95f4"},"content":{"rendered":"

\u4e09\u79cd\u6211\u4eec\u53ef\u4ee5\u5ea6\u91cf\u7684\u65f6\u95f4\uff1a<\/p>\n

    \n
  1. wall clock time<\/li>\n
  2. user cpu time<\/li>\n
  3. system cpu time<\/li>\n<\/ol>\n

    \u4efb\u4f55\u8fdb\u7a0b\u90fd\u80fd\u8c03\u7528times<\/span>\u51fd\u6570\u53bb\u83b7\u5f97\u5b83\u81ea\u5df1\u6216\u4efb\u4f55\u5df2\u7ecf\u7ec8\u6b62\u7684\u5b50\u8fdb\u7a0b\u7684\u4e09\u79cd\u65f6\u95f4\u3002<\/p>\n\n\n\n\n
    \n
    #include <sys\/times.h>\r\n\r\nclock_t times(struct tms *buf<\/span>);\r\n<\/span><\/pre>\n<\/td>\n<\/tr>\n
    \n

    Returns: elapsed wall clock time in clock ticks if OK, 1 on error<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u8fd9\u4e2a\u51fd\u6570\u5c06\u586b\u5145buf<\/em>\u6307\u5411\u7684tms<\/span>\u7ed3\u6784\uff1a<\/p>\n

    struct tms {\r\n     clock_t  tms_utime;  \/* user CPU time *\/\r\n     clock_t  tms_stime;  \/* system CPU time *\/\r\n     clock_t  tms_cutime; \/* user CPU time, terminated children *\/\r\n     clock_t  tms_cstime; \/* system CPU time, terminated children *\/\r\n   };\r\n<\/span><\/pre>\n
    \u6ce8\u610f\uff1a\u8be5\u7ed3\u6784\u4e2d\u5e76\u4e0d\u5305\u542b\u4efb\u4f55wall clock time\u3002\u800c\u662f\u7528wall clock time\u505a\u4e3a\u51fd\u6570\u7684\u8fd4\u56de\u503c\u586b\u5145\u8be5\u7ed3\u6784\u3002\u8fd9\u4e2a\u503c\u662f\u4ece\u8fc7\u53bb\u67d0\u4e2a\u65f6\u95f4\u70b9\u5f00\u59cb\u6d4b\u91cf\u7684\uff0c\u6240\u4ee5\u4e0d\u80fd\u4f7f\u7528\u5b83\u7684\u7edd\u5bf9\u503c\uff0c\u800c\u662f\u4f7f\u7528\u5b83\u7684\u76f8\u5bf9\u503c\u3002\u4f8b\u5982\uff1a\u6211\u4eec\u8c03\u7528times<\/span>\u5e76\u4fdd\u5b58\u4e86\u5b83\u7684\u8fd4\u56de\u503c\u3002\u5728\u7a0d\u540e\uff0c\u518d\u6b21\u4f7f\u7528times<\/span>\uff0c\u7528\u8fd4\u56de\u7684\u503c\u51cf\u4e4b\u524d\u7684\u90a3\u4e2a\u503c\u3002\u5f97\u5230\u7684\u5dee\u5c31\u662fwall clock time\u3002\uff08\u867d\u7136\u53ef\u884c\uff0c\u4f46\u662f\u5bf9\u4e8e\u4e00\u4e2a\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u8fdb\u7a0b\uff0c\u4fdd\u5b58\u7684\u65f6\u95f4\u5f88\u6709\u53ef\u80fd\u6ea2\u51fa\uff09<\/p>\n
    \u5176\u4e2d\u4e24\u4e2a\u5b57\u6bb5\u7684\u503c\u662f\u4e13\u95e8\u7528\u4e8ewaited\uff08wait<\/span>, waitid<\/span>\u6216waitpid<\/span>\uff09\u7684\u5b50\u8fdb\u7a0b\u3002<\/p>\n
    \u7531\u8be5\u51fd\u6570\u8fd4\u56de\u7684clock_t<\/span>\u7c7b\u578b\u7684\u503c\u90fd\u4f1a\u7531\u6bcf\u79d2\u7684\u6ef4\u7b54\u6570\u8f6c\u6362\u6210\u79d2\uff08\u6bcf\u79d2\u6ef4\u7b54\u6570\u4f7f\u7528sysconf(_SC_CLK_TCK\uff09<\/span>\u5f97\u5230\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u4e09\u79cd\u6211\u4eec\u53ef\u4ee5\u5ea6\u91cf\u7684\u65f6\u95f4\uff1a wall clock time user cpu time system cpu time \u4efb\u4f55\u8fdb\u7a0b\u90fd\u80fd\u8c03\u7528times\u51fd\u6570\u53bb\u83b7\u5f97\u5b83\u81ea\u5df1…<\/p>\n
     Read More  Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-455","post","type-post","status-publish","format-standard","hentry","category-apue"],"_links":{"self":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/455","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=455"}],"version-history":[{"count":3,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/455\/revisions"}],"predecessor-version":[{"id":458,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/455\/revisions\/458"}],"wp:attachment":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=455"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=455"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=455"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}