Ivan Voras wrote:
...
OTOH if the goal is to measure "operating system" performance, this
must also include the compiler, libraries and all. (for example, what
does Solaris default to nowadays? I think it ships with gcc but not as
default). The hold on gcc 4.3 in FreeBSD is, after all, political
(licencing).
This is very bad to read :-(
Many of my colleaugues are involved in HPC, very little of them
(including myself) utilizing FreeBSD even due to the lack of fast
compilers. Yes, we all can use the port, that is right, but for those
not so familiar and deep inside the underlying OS, with newer, better
hardware (CPUs with some interesting hardware features like SSE3/4) a
on-track-following compiler like GCC 4.3 could make use of special
features introduced in newer hardware and even due to better
optimizations compile a faster OS. And the result, even in 3% or 5%
performance gain is appreciated if model-runs taking days or weeks!
Regards,
Oliver
If FreeBSD base ever switches to LLVM+clang, this means libc will be
compiled with a non-gcc compiler which will forever change the
performance for simple "real world" benchmarks.
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