ceph/src/googletest/ci/get-nprocessors.sh

   1 #!/usr/bin/env bash
   2 # Copyright 2017 Google Inc.
   3 # All Rights Reserved.
   4 #
   5 #
   6 # Redistribution and use in source and binary forms, with or without
   7 # modification, are permitted provided that the following conditions are
   8 # met:
   9 #
  10 #     * Redistributions of source code must retain the above copyright
  11 # notice, this list of conditions and the following disclaimer.
  12 #     * Redistributions in binary form must reproduce the above
  13 # copyright notice, this list of conditions and the following disclaimer
  14 # in the documentation and/or other materials provided with the
  15 # distribution.
  16 #     * Neither the name of Google Inc. nor the names of its
  17 # contributors may be used to endorse or promote products derived from
  18 # this software without specific prior written permission.
  19 #
  20 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31
  32 # This file is typically sourced by another script.
  33 # if possible, ask for the precise number of processors,
  34 # otherwise take 2 processors as reasonable default; see
  35 # https://docs.travis-ci.com/user/speeding-up-the-build/#Makefile-optimization
  36 if [ -x /usr/bin/getconf ]; then
  37     NPROCESSORS=$(/usr/bin/getconf _NPROCESSORS_ONLN)
  38 else
  39     NPROCESSORS=2
  40 fi
  41
  42 # as of 2017-09-04 Travis CI reports 32 processors, but GCC build
  43 # crashes if parallelized too much (maybe memory consumption problem),
  44 # so limit to 4 processors for the time being.
  45 if [ $NPROCESSORS -gt 4 ] ; then
  46         echo "$0:Note: Limiting processors to use by make from $NPROCESSORS to 4."
  47         NPROCESSORS=4
  48 fi