在消息傳遞客戶端測試應用程序中,需要限制生產者線程以避免氾濫服務器。將線程暫停時間少於1毫秒
由於傳輸速率是大約每秒25000消息(每個消息40微秒),引起睡眠(1)將時間太長的延遲。
How to make thread sleep less than a millisecond on Windows包含一些與Windows API相關的信息。是否有Delphi的代碼片段,類或庫?
繼BENS答案,我發現不同的值,即睡眠低於15也給出了不同的傳輸速率(Windows Vista中):
睡眠(1)每20封郵件後:
00:02 tx/rx 25740/3705 12831/1846 msgs/sec (77/541 microsecs/msg)
00:04 tx/rx 53101/7405 13255/1848 msgs/sec (75/541 microsecs/msg)
00:06 tx/rx 79640/11288 13260/1879 msgs/sec (75/532 microsecs/msg)
00:08 tx/rx 104520/14562 13055/1818 msgs/sec (76/550 microsecs/msg)
00:10 tx/rx 130760/18829 13066/1881 msgs/sec (76/531 microsecs/msg)
睡眠(5)每20條消息之後:
00:02 tx/rx 7640/3622 3812/1807 msgs/sec (262/553 microsecs/msg)
00:04 tx/rx 14660/10794 3661/2695 msgs/sec (273/371 microsecs/msg)
00:06 tx/rx 21480/18171 3577/3026 msgs/sec (279/330 microsecs/msg)
00:08 tx/rx 28140/25642 3515/3203 msgs/sec (284/312 microsecs/msg)
00:10 tx/rx 34980/32692 3496/3267 msgs/sec (286/306 microsecs/msg)
在閱讀評論ab之後,這是意外的出去忙等待
,值沒有節流
00:02 tx/rx 44065/494 21988/246 msgs/sec (45/4065 microsecs/msg)
00:04 tx/rx 90493/756 22595/188 msgs/sec (44/5319 microsecs/msg)
00:06 tx/rx 142982/907 23810/151 msgs/sec (41/6622 microsecs/msg)
00:08 tx/rx 192562/1144 24055/142 msgs/sec (41/7042 microsecs/msg)
00:10 tx/rx 237294/1395 23717/139 msgs/sec (42/7194 microsecs/msg)
您可以實現只忙等待小於1毫秒,無法入睡。 – kludg 2012-01-14 07:42:00
@Serg,AFAIK大約15 ms – OnTheFly 2012-01-14 08:15:57