On 16/09/2012 00:34, Dimitry Andric wrote:
...
The executive summary: GENERIC kernels compiled with clang 3.2 are
slightly faster than those compiled by gcc 4.2.1, though the difference
will not very noticeable in practice.
It has been my impression in the past, that math heavy applications
be
On 2012-09-16 07:25, Garrett Cooper wrote:
...
If you can provide the tests, I can rerun it on some Nehalem class
workstations I have access to. I unfortunately don't have access to
SNB/Romley hardware yet.
I did these tests as follows:
- Install a recent -CURRENT snapshot on the box (or r
On 2012-09-16 07:19, Konstantin Belousov wrote:
On Sun, Sep 16, 2012 at 12:34:45AM +0200, Dimitry Andric wrote:
...
I tried to map the CPUID into more human-friendly family moniker, and it
seems that these are Pentium-4 class CPUs. Am I right ?
Yes, it is apparently a Nocona model, this is pa
On Sat, Sep 15, 2012 at 10:19 PM, Konstantin Belousov
wrote:
> On Sun, Sep 16, 2012 at 12:34:45AM +0200, Dimitry Andric wrote:
>> Hi all,
>>
>> By request, I performed a series of kernel performance tests on FreeBSD
>> 10.0-CURRENT, particularly comparing the runtime performance of GENERIC
>> kern
On Sun, Sep 16, 2012 at 12:34:45AM +0200, Dimitry Andric wrote:
> Hi all,
>
> By request, I performed a series of kernel performance tests on FreeBSD
> 10.0-CURRENT, particularly comparing the runtime performance of GENERIC
> kernels compiled by gcc 4.2.1 and by clang 3.2.
>
> The attached text f
On 2012-09-16 01:22, Luigi Rizzo wrote:
...
the fact that the difference is so small is interesting,
and it might almost suggests that the test is dominated by
other factors than the compiler.
Yes, this result was more or less what I expected: runtime performance
is probably related more to har
On Sun, Sep 16, 2012 at 12:34:45AM +0200, Dimitry Andric wrote:
> Hi all,
>
> By request, I performed a series of kernel performance tests on FreeBSD
> 10.0-CURRENT, particularly comparing the runtime performance of GENERIC
> kernels compiled by gcc 4.2.1 and by clang 3.2.
the fact that the diffe
Hi all,
By request, I performed a series of kernel performance tests on FreeBSD
10.0-CURRENT, particularly comparing the runtime performance of GENERIC
kernels compiled by gcc 4.2.1 and by clang 3.2.
The attached text file[1] contains more information about the tests,
some semi-cooked performanc
