Hi.
I've written a patch draft that replaces zlib with the zstd compression
algorithm ([1])
in LTO. I'm also sending statistics that are collected for couple of quite big
C++ source
files. Observation I did:
- LTO stream compression takes 3-4% of LGEN compile time
- zstd in default compression
On 6/19/19 3:21 AM, Martin Liška wrote:
> Hi.
>
> I've written a patch draft that replaces zlib with the zstd compression
> algorithm ([1])
> in LTO. I'm also sending statistics that are collected for couple of quite
> big C++ source
> files. Observation I did:
>
> - LTO stream compression take
On June 19, 2019 6:03:21 PM GMT+02:00, Jeff Law wrote:
>On 6/19/19 3:21 AM, Martin Liška wrote:
>> Hi.
>>
>> I've written a patch draft that replaces zlib with the zstd
>compression algorithm ([1])
>> in LTO. I'm also sending statistics that are collected for couple of
>quite big C++ source
>> fi
On Wed, Jun 19, 2019 at 11:55 AM Richard Biener
wrote:
>
> On June 19, 2019 6:03:21 PM GMT+02:00, Jeff Law wrote:
> >On 6/19/19 3:21 AM, Martin Liška wrote:
> >> Hi.
> >>
> >> I've written a patch draft that replaces zlib with the zstd
> >compression algorithm ([1])
> >> in LTO. I'm also sending
>
> At least allow it to be built as part of the normal build like GMP,
> etc. are done.
> And include it in downloading using contrib/download_prerequisites
> like the libraries are done.
Anoying detail is that zstd builds with cmake, not autotools
Honza
>
> Thanks,
> Andrew Pinski
>
> >
> >
On Wed, Jun 19, 2019 at 12:29 PM Jan Hubicka wrote:
>
> >
> > At least allow it to be built as part of the normal build like GMP,
> > etc. are done.
> > And include it in downloading using contrib/download_prerequisites
> > like the libraries are done.
>
> Anoying detail is that zstd builds with c
Hello.
As mentioned by Honza, it's using cmake and to be honest I prefer to use a
shared
library than a statically build library. Moreover, it's an optional requirement
and
so that we don't have to include that to contrib/download_prerequisites.
I like the idea of marking of compression algorit
On Wed, Jun 19, 2019 at 09:29:54PM +0200, Jan Hubicka wrote:
> >
> > At least allow it to be built as part of the normal build like GMP,
> > etc. are done.
> > And include it in downloading using contrib/download_prerequisites
> > like the libraries are done.
>
> Anoying detail is that zstd build
Am 20.06.19 um 11:07 schrieb Martin Liška:
On the contrary, decompression
of zstd with zlib will end with:
lto1: internal compiler error: compressed stream: data error
Sogenerating object files on one system and trying to read them
on another system which does not happen to have a particular
li
On 6/20/19 12:58 PM, Thomas Koenig wrote:
> Am 20.06.19 um 11:07 schrieb Martin Liška:
>> On the contrary, decompression
>> of zstd with zlib will end with:
>> lto1: internal compiler error: compressed stream: data error
>
> Sogenerating object files on one system and trying to read them
> on anot
On 6/20/19 12:46 PM, Segher Boessenkool wrote:
> OTOH, how well has this been tested, then? On different platforms, etc.?
Dunno.
The algorithm is quite new (4 years), but as it's becoming more popular.
So I would expect coverage would be quite good.
Maybe Nathan can comment on this?
Martin
> On 6/20/19 12:58 PM, Thomas Koenig wrote:
> > Am 20.06.19 um 11:07 schrieb Martin Liška:
> >> On the contrary, decompression
> >> of zstd with zlib will end with:
> >> lto1: internal compiler error: compressed stream: data error
> >
> > Sogenerating object files on one system and trying to read
Hi Martin,
LTO bytecode is not supposed to be a distributable format.
One of my dreams is to make libgfortran LTO-clean. There is
a lot of performance to be gained both in I/O (where a huge
number of special cases could be shortcut by LTO, because
hardly any program uses them all) and in arra
Any use of a host library should come with associated configure options to
specify header and library paths for that library (and documentation for
those options). (See existing --with-gmp*, --with-isl* etc. options.)
--
Joseph S. Myers
jos...@codesourcery.com
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