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  • Artigo

?? ??? ????? ???????? ? ???? ???? ??????. ??????????? ??? ? ???, ??? ????? ??????????, ?????????? ? ???????? ????? TCP/IP ??????????, ?????????? ?? ??, ??? ????????? ??????? ?? ???? ???????? ????? ????????, ? ???, ??????, ?????????? ??????? ????? ????? 300 ??????????? – ??????????. ???????, ???? ?? ????, ??? ?????????? ???????? ??? ?? ? ??? ?? ??????, - ????????? ??? ??????? ???????? ???? ?????? ??????????????. ??? ??????? ??????? ???????, ??? ?? ?????????? ???? ? ???????? ???????? ?? ?????? ????????? ? ????? «????? ???????????» (? ??????????, ??? ??? ??? ????????).

????? ????, ????????? ????????? ??????? ??????. ?????? ?? ???, ??????????? ????????, ???????? ??????? ??????????????. ??? ??????? ????????????? ??????????, ??????? ???????? ???????? ?????????? ????????, ??????? ???????? ???????? ??? ???:

  1. ?????? ???????? ??????? ????? ?????? ? ???????:

     message->timestamp = (DWORD)QueryPerformanceCounter();
send(message);

  2. ?????? ?????????? ???? ????? ??? ?????? ?????? ? ???????? - ??? ???????:

     message->timestamp += (DWORD)QueryPerformanceCounter();
…
message->timestamp -= (DWORD)QueryPerformanceCounter();
send(message);

  3. ?????? ?????????? ??????? ????? ? ?????????? ? ??????:

     DWORD delta = (DWORD)QueryPerformanceCounter() - message->timestamp;
double latency = (double)delta / QueryPerformanceFrequency();

?????????? ?????? ?????? ?????, ????????? ????? ????????? ? ??????? ??????, ?? ??????? ??????? ?? ????????? ?????? ????????. ???? ? ?????????????? ??????? 4-? ???? ???????? ???? ? ?? ????? ??????, ?? ???????? ??? ??????? ???, ???? DWORD ????????? ???????? ???????? ???????, ??? ???????????? ???????? ??????.

??????? ?????? ????????? ? ???, ??? ??????? ??????? ???????? ?????????? ????????? ????????? ?? ??????? ?? ??????? ? ???????. ?????????, ??? ??? ?????? ?????????? ?????????? ??????? ??????? ???????? ?????????? ???? ?????? ?? ??? ???, ???? ?????????? ?? ?????? ? ?????? ???????? ?? ???????????? ?????????.

Cross-posted from blog.not-a-kernel-guy.com.