48 lines
1.5 KiB
Plaintext
48 lines
1.5 KiB
Plaintext
Microsoft Research Detours Package
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==============================================================================
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4/2/98
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* Instrumentation:
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Read Pentium cycle counter
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* PC configuration:
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DCOM/TCP, Windows NT Server 4.0,
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between two 300MHz Pentium boxes,
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Ethernet connecction
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* Client test program:
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HRESULT get(SHORT, SHORT, LONG*)
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average over 1,000 calls
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midl /Oicf
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* Results:
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get() {
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<-- (1)
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IRpcChannelBuffer::SendReceive()) {
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<-- (2)
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I_RpcSendReceive() {
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<-- (3)
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send(soc, )
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<-- (4)
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NtWaitForSingleObject(soc, )
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<-- (5)
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} // end of RPC layer
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<-- (6)
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} // end of channel object
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<-- (7)
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} // end of client call
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Average number
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of Pentium cycles
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(1) NDR marshaling overhead (2 SHORTs) 13 K
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(No! of which 11K from GetBuffer,
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of which 6.2K from I_RpcGetBuffer()!)
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(2) Channel object one-way (send) overhead 1.0 K
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(3) RPC layer one-way (send) overhead 5.3 K
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(4) TCP + all server work 200 K
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(5) RPC layer one-way (recv) overhead 5.1 K
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(6) Channel object one-way (recv) overhead 2.2 K
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(7) NDR unmarshaling overhead (2 LONGs) 4.2 K
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(*) send() only 17 K
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TOTAL CYCLES for client get(): 230 K
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