7.0 CPU and Memory Performance

[Tim Traver]

Robert Watson wrote:
>
> On Tue, 12 Aug 2008, Tim Traver wrote:
>
>> I have recently had the opportunity to upgrade a few servers from old
>> versions of 5.4 to 7.0, and have seen some interesting data. Before
>> doing this, I wanted to take some benchmarks to see how the scripts
>> that I would run would fare between the two versions, and the results
>> are somewhat confusing...
>
> There are potentially a lot of variables here, you migh want to try
> fiddling with the following and see what difference it makes:
>
> (1) Try both 4BSD and ULE in 7.0 -- they have different properties,
> and at the
>     very least it would be nice to see what impact it has.
>
> (2) Statically compile the 5.4 binary, and run the same binary on both
> 5.4 and
>     7.0 -- there have been lots of compiler changes, which might be
> relevant.
>
> Also, can you confirm that you're running either 32-bit or 64-bit
> kernels consistently on both versions of FreeBSD?
>
> Robert N M Watson
> Computer Laboratory
> University of Cambridge
>
>
Robert,

ok, I looked and it looks like the port compiles statically, and I was
able to grab the binary from the old disk and move it over to the new one...

here is info now on how it is linked :

[root ~]# ldd ubench.5.4
ubench.5.4:
        libm.so.3 => /usr/local/lib/compat/libm.so.3 (0x2807e000)
        libc.so.5 => /usr/local/lib/compat/libc.so.5 (0x28099000)
[root ~]# ldd /usr/local/bin/ubench
/usr/local/bin/ubench:
        libm.so.5 => /lib/libm.so.5 (0x2807f000)
        libc.so.7 => /lib/libc.so.7 (0x28094000)

where ubench is the locally compiled one...

For reference, here are the old stats
FreeBSD 5.4 - CPU 112,721 - MEM - 146,483
FreeBSD 7.0 - CPU 177,339 - MEM - 95,920

And here is the run of the ubench.5.4 binary:
FreeBSD 7.0 - CPU 139,623 - MEM - 207,180

And a rerun of the FreeBSD 7.0 ubench making sure there is absolutely no activity on the box
FreeBSD 7.0 - CPU 200,562 - MEM - 107,695

That run is a little better than the previous one, but there seems to still be quite a difference in the memory tests...

Does that show anything ????

Tim.