readme.txt

微软提供的截取Win32 API函数的开发包和例子detours-src-1.2.rar

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4/2/98

* Instrumentation:
    Read Pentium cycle counter

* PC configuration:
    DCOM/TCP, Windows NT Server 4.0, 
    between two 300MHz Pentium boxes, 
    Ethernet connecction

* Client test program:
    HRESULT get(SHORT, SHORT, LONG*)
    average over 1,000 calls
    midl /Oicf

* Results:							
    get() {
					<-- (1) 	  
      IRpcChannelBuffer::SendReceive()) { 
					<-- (2) 	                                            	  
        I_RpcSendReceive() { 
					<-- (3) 	                                            		 
          send(soc, ) 
					<-- (4)
          NtWaitForSingleObject(soc, ) 
					<-- (5)  
        } // end of RPC layer
					<-- (6)                                              	  
      } // end of channel object
					<-- (7) 	  
    } // end of client call
							Average number
 						       of Pentium cycles
    (1) NDR marshaling overhead (2 SHORTs)		13   K 
                (No! of which 11K from GetBuffer, 
                     of which 6.2K from I_RpcGetBuffer()!)
    (2) Channel object one-way (send) overhead		 1.0 K
    (3) RPC layer one-way (send) overhead		 5.3 K
    (4) TCP + all server work		      	       200   K
    (5) RPC layer one-way (recv) overhead		 5.1 K
    (6) Channel object one-way (recv) overhead		 2.2 K
    (7) NDR unmarshaling overhead (2 LONGs)		 4.2 K

    (*) send() only					17   K
    TOTAL CYCLES for client get(): 230 K