Windows 7 inter-process communication has big performance problems

Question

0.00/5 (No votes)

See more:

We have a system, written by C++. When it starts running, it will start an addon program. The addon is a COM EXE (outer process server). Customers can call the addon, get the system pointer, developing new features for the system. The performance is good under windows XP, but it is slower 7~8 times after we install our system on the Windows 7. I add amount of data into system, record the time at different parts. Finally, I found that the interprocess calling is very very slow. I don't know why? Could anybody help me? I was persecuted by it for a long period.

Posted 12-Jun-10 23:57pm

pear76

Updated 13-Jun-10 0:51am

Moak

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Hristo-Bojilov · Answer 1 · 2010-06-13T08:54:00

Solution 1

Your question is to general.You should mention the details for inter-process communication model are you using and maybe post some relevant code.Have you tried to analyse your service using a profiler like VTune or AMD code analyst?You could even debug it and find the hot spots that slow down your code. :)

Posted 13-Jun-10 8:54am

Hristo-Bojilov

Updated 13-Jun-10 8:56am

v2

Comments

pear76 13-Jun-10 22:43pm

Yes, I have used tool, like LTProf. But it isn't useful, it only calculates time of our codes, not count in RPC time. The problem doesn't lie in our codes. I added 1000 records into our system, for some critical functions, I test 10 times each. Record two sides time ------ our system and customer's program, and then use custoer's program time to subtract our system time, get the time which waste in IPC, comparing the time between windows XP and windows 7. For the COM EXE, it is not complicate, it just exposes the system pointer for customer's program, customer uses it to invoke our system, of course, the calling is inter-process.

[no name] 14-Jun-10 4:53am

You said you subtracted customer's computer time from server time.Are sure that that these times are perfectly synchronized ? Do you have any special firewalls or antivirus programs installed on the client's computer?They could potentially slow down access to remote code.

pear76 14-Jun-10 21:34pm

Thank you very much for your answer. Definitely, The system is new, I close all the firewalls and antivirus programs. I also test it in other systems recently, and found that it is not only existed in windows 7, but also does in Vista and Windows Server 2008 R2. Whatever x86 or x64, they all have the same problem.