This is the mail archive of the ecos-discuss@sources.redhat.com mailing list for the eCos project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: Measuring times


On Wed, 2004-11-24 at 13:59, Abhi wrote:
> Hi,
>     eCos version: 2.0 + from the CVS
>     Host: Linux Redhat 9 2.4.x kernel
>     Target: iPAQ
>     Redboot: yes (installed & working)
>     Sample tests: some simple tests work
> 
>     Question:
>     I would like to performance benchmark some of the code that I have 
> written. Are there any helper functions in the sources/tests/examples which 
> do this. (like a Stats kind of class, which maintains all the values in an 
> array and then prints out mean/max/min etc...)
> 
>     More fundamentally, what functions should I use to measure the elapsed 
> time between 2 points. Should I use:
> 
> cyg_handle_t cyg_real_time_clock(void);
> or
> cyg_tick_count_t cyg_current_time(void)
> or
> something else which has better resolution on iPAQ?
> 
> Also how do I convert these to seconds/micro-seconds on iPAQ? (i.e get the 
> wall clock)

Look at the kernel test program 'tm_basic.cxx'  It does exactly this.
   
-- 
Gary Thomas <gary@mlbassoc.com>
MLB Associates


-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]