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Re: Bootstrap times on mainline are getting worse


On Sat, Oct 19, 2002 at 10:17:41AM -0700, Zack Weinberg wrote:
> > 
> > real    57m38.632s
> > user    51m20.200s
> > sys     4m55.500s
> > 
> > 
> > With this patch I get:
> > 
> > real    58m16.766s
> > user    51m14.720s
> > sys     5m0.850s
> 
> I smell cache blowout.  Notice how the real and system times went up,
> but the user time went down?
> 
I/O activity on the same machine could be the reason of this increase of
the sys time... (I'm not the only one to use this machine)

Maybe I have to run more than once 'time make bootstrap' for having an 
average value.  3 seems to be a good value. Another solution is to run 
the 'time make bootstrap' on 2 different machines... 

> The processor_costs tables are entirely populated with values which we
> can reasonably expect will never rise above 256.  So I propose to
> change all the fields to unsigned char.  Would you mind trying out the
> appended patch on top of 2002-10-03+Roger's patch?
> 
I will do.

I have tried to bootstrap a version of 2002-10-05 and 2002-10-06, 
but the bootstrap stopped on an error trying to build 
libstdc++-v3/src/ext-inst.cc

I've bootstrapped again the 2002-10-03 on the same machine, 

real    57m30.512s
user    51m10.860s
sys     4m57.940s

then I'll bootstrap again 2002-10-03 + Roger's patch, 
and finally I'll bootstrap 2002-10-03 + Roger's patch + your patch.

I try to bootstrap the 2002-10-07 on another machine, results will come shortly.


Sebastian


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