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test/Detours/samples/cping/ReadMe.Txt

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+Microsoft Research Detours Package
+==============================================================================
+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