Re: [Boost-build] test timing information

From: Vladimir Prus (ghost_at_[hidden])
Date: 2007-11-10 13:52:30

David Abrahams wrote:

> 
> Did we ever put code in bjam that will allow us to get timing
> information for individual build steps?  

I think you tried to do that, but I'm not sure it was ever finished.

> I realize we are getting 
> timestamps, but that doesn't quite amount to the same thing,
> especially because we get a stamp for the beginning of a test run but
> not the end, but also because we really want to know the user and/or
> system time rather than real time, which can be grossly distorted by
> other activity on the machine.

The user and/or system time can be likewise distorted by other activity -- in
particular the number of cache faults is dependent on what other application
are busy thrashing the cache.

- Volodya