Mercurialcrosstool-ng / file revision
summary | shortlog | changelog | graph | tags | branches | files | changeset | file | latest | revisions | annotate | diff | raw | help
patches/binutils/2.16.1a/100-bfd-hash-tweak.patch
author Michael Hope <michael.hope@linaro.org>
Thu Sep 29 12:40:42 2011 +1300 (2011-09-29)
changeset 2695 f2495884ca3e
parent 402 197e1b49586e
permissions -rw-r--r--
config: add a 'auto' value for the number of parallel jobs

When CT_PARALLEL_JOBS is -1, set the number of parallel jobs to the
number of online CPUs + 1. Update documentation to match.

I find this useful when building in the cloud. You can use the same
.config file and have the build adapt to the number of processors
available. Limited testing shows that NCPUS+1 is faster than NCPUS+0
or NCPUS+2.

Signed-off-by: Michael Hope <michael.hope@linaro.org> 
     1 Signed-off-by: dank@kegel.com

     2 

     3 Raising the size of the hash table is a noticable win when linking 

     4 at least one large app.  

     5 

     6 There was a patch,

     7 http://sources.redhat.com/ml/binutils/2004-06/msg00165.html

     8 to do this dynamically.  No idea why that didn't make it in.

     9 So this tiny change to raise the default size is just

    10 a stopgap for now.

    11 

    12 

    13 --- binutils-2.16.1/bfd/hash.c.old	2006-03-02 23:01:39.000000000 -0800

    14 +++ binutils-2.16.1/bfd/hash.c	2006-03-02 23:01:58.000000000 -0800

    15 @@ -300,7 +300,7 @@

    16  */

    17  

    18  /* The default number of entries to use when creating a hash table.  */

    19 -#define DEFAULT_SIZE 4051

    20 +#define DEFAULT_SIZE 32749

    21  static size_t bfd_default_hash_table_size = DEFAULT_SIZE;

    22  

    23  /* Create a new hash table, given a number of entries.  */
crosstool-ng