Benchmarking C++ operators 2004-06-01 - By Felix Gebhardt
Back
Luc-Eric Rousseau wrote:
> right, QueryPerformanceCounter is what we
> use for mesuring an operator's performance.
Now I only need to actually HAVE your operator's performance. But hey, at
least we use the same timer ;)
Thanks for telling,
Felix
> -- --Original Message-- --
> From: owner-xsi@(protected) [mailto:owner-xsi@(protected)]On Behalf
> Of Felix Gebhardt
> Posted At: Tuesday, June 01, 2004 10:08 AM
> Posted To: xsi
> Conversation: Benchmarking C++ operators
> Subject: Re: Benchmarking C++ operators
>
>
> Hi Daniel, thanks for helping out,
>
> I already had a look at VTune. Like you said. It's way overdosed for my
> purpose and too expensive to setup. I will have a look at the MSVC option
> but I also found something interesting on codeproject.
> http://www.codeproject.com/cpp/precisetimer.asp
>
>
> If there is anything else, keep em coming,
> Felix
>
>
>
>
> Daniel Bachler wrote:
>> Well there is Intels Vtune, but it's quite expensive (although I think
>> that there is a trial version available) and it can be a bit tough to set
>> up so that it returns some usefull information. MSVC has some kind of
>> profiler of its own IIRC, but without any graphical representation or
>> anything fancy. And, last but not least, you can of course take
>> timestamps yourself everytime you operator gets called and everytime it
>> returns and measuring that time. If it's something simple I would first
>> try the last trick, it's quite fast to setup and very precise, as the
>> time you loose on profiling is really negligible. If you want to take it
>> a step further you can store an array of simple structures containing
>> last starttime and amount of time in that block, then write two small
>> function, like this: (C++ style pseudocode)
>>
>> Void StartBlock(int blockIndex)
>> {
>> m_ProfilerStructures[blockIndex].m_Starttime = gettime();
>> }
>>
>> Void EndBlock(int blockIndex)
>> {
>> m_ProfilerStructures[blockIndex].m_ElapsedTime += gettime() -
>> m_ProfilerStructures[blockIndex].m_Startime();
>> }
>>
>> You can then use it like this:
>>
>> StartBlock(INIT);
>> Initialize();
>> EndBlock(INIT);
>> StartBlock(MAIN);
>> DoStruff();
>> EndBlock(MAIN);
>>
>> Daniel
>>
>>> -- --Original Message-- --
>>> From: owner-xsi@(protected)
>>> [mailto:owner-xsi@(protected)] On Behalf Of Felix Gebhardt
>>> Sent: Tuesday, June 01, 2004 2:22 PM
>>> To: XSI@(protected)
>>> Subject: Benchmarking C++ operators
>>>
>>> Hi all,
>>>
>>> does anyone happen to have an advise on what's the best way
>>> to benchmark
>>> compiled operators? In VBS I just would take a time snapshot
>>> but it's not
>>> too precise. How to nail it down better in C++? Any simple
>>> but precise way
>>> or free and easy to use analyzer/profiler?
>>>
>>> Suggestions greatly appreciated,
>>> Felix
>
> ---
> Unsubscribe? Mail Majordomo@(protected) with the following text in body:
> unsubscribe xsi
---
Unsubscribe? Mail Majordomo@(protected) with the following text in body:
unsubscribe xsi
|
|
