blob: fea109590e24b134967a2cfa574e00aaaa202acb (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
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
|
