Re: Question about gettimeofday

[Chris Friesen <cfriesen@nortelnetworks.com>]

Subhash S wrote:
> 
> Hi All,
> 
> In my application I use gettimeofday very frequently, as it is system
> call on linux it is expensive, where as on Solaris it is not so. Could
> you please tell me how solaris is implemented the function gettimeofday.

While I can't tell you how Solaris implemented it, I can say that in general if
you want very frequent timing access you're probably better off using inline
assembly to get at some processor-specific timer.  On a 400Mhz G4, the
difference was about a microsecond for gettimeofday() vs about 25 nanoseconds
for the assembly code.


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