测试

<p style="word-wrap: break-word; margin: 10px auto; font-family: 'ms shell dlg'; font-size: 14px;">[ code=C/C++ ]</p><p style="word-wrap: break-word; margin: 10px auto; font-family: 'ms shell dlg'; font-size: 14px;"> </p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo; color: rgb(201, 27, 19);"><span style="font-variant-ligatures: no-common-ligatures; color: #822e0e">#include </span><sys/time.h></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo; color: rgb(130, 46, 14);">#include <span style="font-variant-ligatures: no-common-ligatures; color: #c91b13"><time.h></span></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo; color: rgb(130, 46, 14);">#include <span style="font-variant-ligatures: no-common-ligatures; color: #c91b13"><stdio.h></span></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo; color: rgb(201, 27, 19);"><span style="font-variant-ligatures: no-common-ligatures; color: #822e0e">#include </span><stdint.h></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo; min-height: 21px;"></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;"><span style="font-variant-ligatures: no-common-ligatures; color: #c32275">void</span> task1(<span style="font-variant-ligatures: no-common-ligatures; color: #c32275">void</span>)</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">{</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">  <span style="font-variant-ligatures: no-common-ligatures; color: #c32275">int</span> i,j;</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo; min-height: 21px;"> </p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">  <span style="font-variant-ligatures: no-common-ligatures; color: #c32275">for</span> (i=<span style="font-variant-ligatures: no-common-ligatures; color: #0435ff">0</span>; i<<span style="font-variant-ligatures: no-common-ligatures; color: #0435ff">3</span>; i++) {</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">    <span style="font-variant-ligatures: no-common-ligatures; color: #c32275">for</span> (j=<span style="font-variant-ligatures: no-common-ligatures; color: #0435ff">0</span>; j<<span style="font-variant-ligatures: no-common-ligatures; color: #0435ff">1000</span>; j++) ;</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">    printf(<span style="font-variant-ligatures: no-common-ligatures; color: #c91b13">"1"</span>);</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">    fflush(stdout);</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">  }</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">}</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo; min-height: 21px;"></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;"><span style="font-variant-ligatures: no-common-ligatures; color: #c32275">void</span> task2(<span style="font-variant-ligatures: no-common-ligatures; color: #c32275">void</span>)</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">{</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">  <span style="font-variant-ligatures: no-common-ligatures; color: #c32275">int</span> i,j;</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo; min-height: 21px;"></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">  <span style="font-variant-ligatures: no-common-ligatures; color: #c32275">for</span> (i=<span style="font-variant-ligatures: no-common-ligatures; color: #0435ff">0</span>; i<<span style="font-variant-ligatures: no-common-ligatures; color: #0435ff">5</span>; i++) {</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">    <span style="font-variant-ligatures: no-common-ligatures; color: #c32275">for</span> (j=<span style="font-variant-ligatures: no-common-ligatures; color: #0435ff">0</span>; j<<span style="font-variant-ligatures: no-common-ligatures; color: #0435ff">10000</span>; j++) ;</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">    printf(<span style="font-variant-ligatures: no-common-ligatures; color: #c91b13">"2"</span>);</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">    fflush(stdout);</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: 'PingFang SC'; color: rgb(29, 148, 33);"><span style="line-height: normal; font-family: Menlo;">//fflush(stdout)</span>刷新标准输出缓冲区，把输出缓冲区里的东西打印到标准输出设备上</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo; color: rgb(29, 148, 33);">//printf("<span style="line-height: normal; font-family: 'PingFang SC';">。。。。。。。。。。。</span>");<span style="line-height: normal; font-family: 'PingFang SC';">后面加</span>fflush(stdout)<span style="line-height: normal; font-family: 'PingFang SC';">；可提高打印效率</span></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">  }</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">}</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo; min-height: 21px;"></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;"><span style="font-variant-ligatures: no-common-ligatures; color: #c32275">void</span> task3(<span style="font-variant-ligatures: no-common-ligatures; color: #c32275">void</span>)</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">{</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">  <span style="font-variant-ligatures: no-common-ligatures; color: #c32275">static</span> uint64_t previous;</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">  uint64_t t;</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">  <span style="font-variant-ligatures: no-common-ligatures; color: #c32275">struct</span> timeval tv;</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo; min-height: 21px;"></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">  <span style="font-variant-ligatures: no-common-ligatures; color: #c32275">if</span> (previous == <span style="font-variant-ligatures: no-common-ligatures; color: #0435ff">0</span>) {</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">    gettimeofday(&tv, <span style="font-variant-ligatures: no-common-ligatures; color: #c32275">NULL</span>);</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">    previous = tv.tv_sec * <span style="font-variant-ligatures: no-common-ligatures; color: #0435ff">1000</span>ULL + tv.tv_usec / <span style="font-variant-ligatures: no-common-ligatures; color: #0435ff">1000</span>ULL;</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">  }</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo; min-height: 21px;"></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">  gettimeofday(&tv, <span style="font-variant-ligatures: no-common-ligatures; color: #c32275">NULL</span>);</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">  t = tv.tv_sec * <span style="font-variant-ligatures: no-common-ligatures; color: #0435ff">1000</span>ULL + tv.tv_usec / <span style="font-variant-ligatures: no-common-ligatures; color: #0435ff">1000</span>ULL;</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">  printf(<span style="font-variant-ligatures: no-common-ligatures; color: #c91b13">"\tT: %Lu\n"</span>, (<span style="font-variant-ligatures: no-common-ligatures; color: #c32275">long</span> <span style="font-variant-ligatures: no-common-ligatures; color: #c32275">long</span> <span style="font-variant-ligatures: no-common-ligatures; color: #c32275">unsigned</span> <span style="font-variant-ligatures: no-common-ligatures; color: #c32275">int</span>)t - previous);</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">  previous = t;</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo;">}</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; line-height: normal; font-family: Menlo; min-height: 21px;"></p><p style="word-wrap: break-word; margin: 10px auto; font-family: 'ms shell dlg'; font-size: 14px;">[ /code]</p>