pakfire/patches/0011-build-parallelism-New-way-to-figure-that-out.patch

   1 From f7a632ab069e3439f312023fc599dc659c197568 Mon Sep 17 00:00:00 2001
   2 From: Michael Tremer <michael.tremer@ipfire.org>
   3 Date: Sun, 3 Feb 2013 21:40:16 +0100
   4 Subject: [PATCH 11/17] build parallelism: New way to figure that out.
   5
   6 The system will now use either the old formula,
   7 CPU cores * 2 + 1 or the amount of memory in megabytes devided
   8 by 128 (i.e. each compiler process can have 128M RAM) which ever
   9 is less.
  10 ---
  11  python/pakfire/system.py | 9 +++++----
  12  1 file changed, 5 insertions(+), 4 deletions(-)
  13
  14 diff --git a/python/pakfire/system.py b/python/pakfire/system.py
  15 index a9154de..6d54d5f 100644
  16 --- a/python/pakfire/system.py
  17 +++ b/python/pakfire/system.py
  18 @@ -157,14 +157,15 @@ class System(object):
  19                         simulatneously when compiling.
  20                 """
  21                 # Check how many processes would fit into the
  22 -               # memory when each process takes up to 500MB.
  23 -               multiplicator = self.memory / (500 * 1024 * 1024)
  24 +               # memory when each process takes up to 128MB.
  25 +               multiplicator = self.memory / (128 * 1024 * 1024)
  26                 multiplicator = round(multiplicator)
  27
  28                 # Count the number of online CPU cores.
  29 -               cpucount = os.sysconf("SC_NPROCESSORS_CONF")
  30 +               cpucount = os.sysconf("SC_NPROCESSORS_CONF") * 2
  31 +               cpucount += 1
  32
  33 -               return min(multiplicator, cpucount * 2)
  34 +               return min(multiplicator, cpucount)
  35
  36
  37  # Create an instance of this class to only keep it once in memory.
  38 --
  39 1.8.1.2
  40