Andi Kleen writes:
> FWIW I suspect not handling lockfile errors could be a show stopper
> even for an initial implementation. It's not that uncommon that people
> press Ctrl-C. flock on systems that have it would be a safer
> alternative.
>
>> There are many things to do and I think it is bette
On Fri, Jun 21, 2024 at 06:59:05PM +0200, Michal Jireš wrote:
> > The lockfiles scare me a bit. What happens when they get lost, e.g.
> > due to a compiler crash? You may need some recovery for that.
> > Perhaps it would be better to make the files self checking, so that
> > partial files can be de
FWIW I suspect not handling lockfile errors could be a show stopper
even for an initial implementation. It's not that uncommon that people
press Ctrl-C. flock on systems that have it would be a safer
alternative.
> There are many things to do and I think it is better to do that in trunk
> rahte
On 6/20/24 7:45 PM, Andi Kleen wrote:
There are much faster/optimized modern hashes for good collision detection over
MD5 especially when it's not needed to be cryptographically secure. Pick
something from smhasher.
Also perhaps the check sum should be cached in the file? I assume it's
cheap to
> Michal Jires writes:
>
> No performance data?
Michal has bachelor thesis on the topic which has some statistics
https://dspace.cuni.cz/handle/20.500.11956/183051?locale-attribute=en
>
> > +
> > +static const md5_checksum_t INVALID_CHECKSUM = {
> > + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
Michal Jires writes:
No performance data?
> +
> +static const md5_checksum_t INVALID_CHECKSUM = {
> + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> +};
There are much faster/optimized modern hashes for good collision detection over
MD5 especially when it's not needed to be cryptographicall
Outside of suggested changes, this version:
- uses #define INCLUDE_*
- is rebased onto current trunk - 'fprintf (mstream,' lines
- --verbose 'recompiling++' count is moved into correct if branch
___
This patch implements Incremental LTO as ltrans cache.
The cache is active when directory $GCC_LT
