On Thu, Jul 25, 2013 at 12:18 PM, Herbert König <herbertkoenig at gmx.net>wrote:

>  Hi Eliot,
>
> under Win7 64 Bit the upgrading from r2701 of March 11th I got a speedup
> from 575 to 231 seconds for my "CSV file reading using symbols to reduce
> memory consumption and speedup #select" job.
>
> The average full gc came down from  811 to 450 ms (averaged over 19 GC's)
>
> So the performance regression may have been in Windows VM's too.
>
> Thanks a lot!
>
> What I don't understand:
> I do a "purge undo records" then a GC.
> In both cases I get around 5MB less used Memory but Squeak uses some
> additional 68 MB (old VM) resp 73 MB (new VM). Total Memory after GC is
> around 445 MB in both cases.
> Is this to be expected and wouldn't happen if the image size were closer
> to the 512 MB Limit of Windows?
>

The Cog VM keeps a lot more memory around in reserve.  It has a machine
code zone, a larger new space and a reserve for flushing the stack zone to
the heap as contexts that the standard VM doesn't use. (all of these extras
are part of the standard linear heap segment).  So the disparity is to be
expected.


> Cheers
>
> Herbert
>

cheers!


>
> Am 16.07.2013 02:35, schrieb Eliot Miranda:
>
> are in http://www.mirandabanda.org/files/Cog/VM/VM.r2749/.
>
>  CogVM binaries as per VMMaker.oscog-eem.302/r2749
>
>  Fix bad performance regression that on certain platforms (linux) results
> in all
> send misses causing a discarded PIC creation followed by a slow hash
> lookup.
>
>  Fix bug when assigning to some context inst vars from generated methods.
> Add accessors to document the context inst var access scheme.
> Fix a compiler warning comparing an error code in cog:selector:
>
>  Update the BitBltPlugin to include the fast Arm ASM option.
>
>  Fix type errors in the Cogit that prevent the Cogit working when
> compiled with
> clang.  Specifically void * pointers are not comparable.  Make sure that
> fetchPointer:ofObject: & isIntegerValue: are declared in cointerp.h.
>
>  Update the Newspeak version of the VMProfileLinuxSupportPlugin.
> Improve robustness of the nscogbuild/unixbuild mvm scripts.
>
>  Add the linux policy change dance to sqUnixVMProfile.c (cf
> sqUnixHeartbeat.c).
> Fix a bail_out typo.
>
>  Change the VMProfileLinuxSupportPlugin to follow symlinks,
> answering pairs of module name, dereferenced symlink or nil.
>
>  Fix 3 (!!) bugs in primitiveDLSymInLibrary.
>
>
>  --
> best,
> Eliot
>
>
>
>
>
>
>


-- 
best,
Eliot
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