Linux (and Android): Implement GetDefaultConcurrentLinks() for Linux Builds

pylib/gyp/generator/ninja.py

Index: pylib/gyp/generator/ninja.py
diff --git a/pylib/gyp/generator/ninja.py b/pylib/gyp/generator/ninja.py
index 25f5780dd26a5f77ad9d27662cd904b1e39e8cfc..0af9cd87e1e995255c322978d1e4b933eede4012 100644
--- a/pylib/gyp/generator/ninja.py
+++ b/pylib/gyp/generator/ninja.py
@@ -1483,6 +1483,16 @@ def GetDefaultConcurrentLinks():
     ctypes.windll.kernel32.GlobalMemoryStatusEx(ctypes.byref(stat))
 
     return max(1, stat.ullTotalPhys / (4 * (2 ** 30)))  # total / 4GB
+  elif sys.platform.startswith('linux'):
+    meminfo = open("/proc/meminfo")

[scottmg, 2013/08/21 15:44:58]

with open("/proc/meminfo") as meminfo:
  ...

[anton1, 2013/08/21 16:06:59]

Done.

+    memtotal_re = re.compile(r'^MemTotal:\s*(\d*)\s*kB')
+    for line in meminfo:
+      match = memtotal_re.match(line)
+      if not match:
+        continue
+      # Allow 8Gb per link on Linux because Gold is quite memory hungry
+      return max(1, int(match.group(1)) / (8 * (2 ** 20)))  # total_Kb / 8GB

[scottmg, 2013/08/21 15:44:58]

change comment to match (MB) or remove

[anton1, 2013/08/21 16:06:59]

Done.

+    return 1
   else:
     # TODO(scottmg): Implement this for other platforms.
     return 1