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Re: Patch: Increase GGC_QUIRE_SIZE

From: Andrew Pinski <pinskia at physics dot uc dot edu>
To: Matt Austern <austern at apple dot com>
Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Sun, 26 Sep 2004 21:31:12 -0400
Subject: Re: Patch: Increase GGC_QUIRE_SIZE
References: <C8AAE37F-1023-11D9-8FB0-000A95BCF344@apple.com>

On Sep 26, 2004, at 9:23 PM, Matt Austern wrote: /* Allocate pages in chunks of this size, to throttle calls to memory

     allocation routines.  The first page is used, the rest go onto the
     free list.  This cannot be larger than HOST_BITS_PER_INT for the
!    in_use bitmask for page_group.  Hosts that need a different value
!    can override this by defining GGC_QUIRE_SIZE explicitly. */
! #ifndef GGC_QUIRE_SIZE
! # ifdef USING_MMAP
! #  define GGC_QUIRE_SIZE 256
! # else
! #  define GGC_QUIRE_SIZE 16
! # endif
! #endif


If I read the comment correctly, you cannot set it to 256 at all because
that would be larger than HOST_BITS_PER_INT (64bits).

Thanks,
Andrew Pinski

Follow-Ups:
- Re: Patch: Increase GGC_QUIRE_SIZE
  - From: Zack Weinberg

References:
- Patch: Increase GGC_QUIRE_SIZE
  - From: Matt Austern

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