On 2/16/18 12:14 PM, Martin Jansa wrote:
+            v = max(limit, v)

this seems to be doing the opposite of what the limit was used for before:

-                v = min(64, int(v))


moreover, I think the limit should be based on ncpu() instead of hard coding it.

On Mon, Feb 12, 2018 at 8:39 PM, Joshua Watt <[email protected] <mailto:[email protected]>> wrote:

    The code to extract the integer number of parallel build threads and
    construct a new argument from them has started to be copied in multiple
    locations, so create two new helper utilities to aid recipes.

    The first helper (parallel_make()) extracts the integer number of
    parallel build threads from PARALLEL_MAKE. The second
    (parallel_make_argument()) does the same and then puts the result back
    into a format string, optionally clamping it to some maximum value.

    Additionally, rework the oe-core recipes that were manually doing this
    to use the new helper utilities.

    Signed-off-by: Joshua Watt <[email protected]
    <mailto:[email protected]>>
    ---
      meta/classes/go.bbclass              | 19 +---------------
      meta/classes/waf.bbclass             | 24 +-------------------
      meta/lib/oe/utils.py                 | 43
    ++++++++++++++++++++++++++++++++++++
      meta/recipes-core/ovmf/ovmf_git.bb <http://ovmf_git.bb>   |  2 +-
      meta/recipes-support/boost/boost.inc | 24 +-------------------
      5 files changed, 47 insertions(+), 65 deletions(-)

    diff --git a/meta/classes/go.bbclass b/meta/classes/go.bbclass
    index 09b01a84c37..7ecd8c92541 100644
    --- a/meta/classes/go.bbclass
    +++ b/meta/classes/go.bbclass
    @@ -1,23 +1,6 @@
      inherit goarch ptest

    -def get_go_parallel_make(d):
    -    pm = (d.getVar('PARALLEL_MAKE') or '').split()
    -    # look for '-j' and throw other options (e.g. '-l') away
    -    # because they might have a different meaning in golang
    -    while pm:
    -        opt = pm.pop(0)
    -        if opt == '-j':
    -            v = pm.pop(0)
    -        elif opt.startswith('-j'):
    -            v = opt[2:].strip()
    -        else:
    -            continue
    -
    -        return '-p %d' % int(v)
    -
    -    return ""
    -
    -GO_PARALLEL_BUILD ?= "${@get_go_parallel_make(d)}"
    +GO_PARALLEL_BUILD ?= "${@oe.utils.parallel_make_argument(d, '-p %d')}"

      GOROOT_class-native = "${STAGING_LIBDIR_NATIVE}/go"
      GOROOT_class-nativesdk = "${STAGING_DIR_TARGET}${libdir}/go"
    diff --git a/meta/classes/waf.bbclass b/meta/classes/waf.bbclass
    index bdbdc56767c..f9a851d0759 100644
    --- a/meta/classes/waf.bbclass
    +++ b/meta/classes/waf.bbclass
    @@ -3,28 +3,6 @@ DISABLE_STATIC = ""

      EXTRA_OECONF_append = " ${PACKAGECONFIG_CONFARGS}"

    -def get_waf_parallel_make(d):
    -    pm = d.getVar('PARALLEL_MAKE')
    -    if pm:
    -        # look for '-j' and throw other options (e.g. '-l') away
    -        # because they might have different meaning in bjam
    -        pm = pm.split()
    -        while pm:
    -            v = None
    -            opt = pm.pop(0)
    -            if opt == '-j':
    -                v = pm.pop(0)
    -            elif opt.startswith('-j'):
    -                v = opt[2:].strip()
    -            else:
    -                v = None
    -
    -            if v:
    -                v = min(64, int(v))
    -                return '-j' + str(v)
    -
    -    return ""
    -
      python waf_preconfigure() {
          import subprocess
          from distutils.version import StrictVersion
    @@ -47,7 +25,7 @@ waf_do_configure() {

      do_compile[progress] = "outof:^\[\s*(\d+)/\s*(\d+)\]\s+"
      waf_do_compile()  {
    -       ${S}/waf build ${@get_waf_parallel_make(d)}
    +       ${S}/waf build ${@oe.utils.parallel_make_argument(d, '-j%d',
    limit=64)}
      }

      waf_do_install() {
    diff --git a/meta/lib/oe/utils.py b/meta/lib/oe/utils.py
    index 7a79d752b69..ec91927233a 100644
    --- a/meta/lib/oe/utils.py
    +++ b/meta/lib/oe/utils.py
    @@ -156,6 +156,49 @@ def any_distro_features(d, features,
    truevalue="1", falsevalue=""):
          """
          return bb.utils.contains_any("DISTRO_FEATURES", features,
    truevalue, falsevalue, d)

    +def parallel_make(d):
    +    """
    +    Return the integer value for the number of parallel threads to
    use when
    +    building, scraped out of PARALLEL_MAKE. If no parallelization
    option is
    +    found, returns None
    +
    +    e.g. if PARALLEL_MAKE = "-j 10", this will return 10 as an integer.
    +    """
    +    pm = (d.getVar('PARALLEL_MAKE') or '').split()
    +    # look for '-j' and throw other options (e.g. '-l') away
    +    while pm:
    +        opt = pm.pop(0)
    +        if opt == '-j':
    +            v = pm.pop(0)
    +        elif opt.startswith('-j'):
    +            v = opt[2:].strip()
    +        else:
    +            continue
    +
    +        return int(v)
    +
    +    return None
    +
    +def parallel_make_argument(d, fmt, limit=None):
    +    """
    +    Helper utility to construct a parallel make argument from the
    number of
    +    parallel threads specified in PARALLEL_MAKE.
    +
    +    Returns the input format string `fmt` where a single '%d' will
    be expanded
    +    with the number of parallel threads to use. If `limit` is
    specified, the
    +    number of parallel threads will be no larger than it. If no
    parallelization
    +    option is found in PARALLEL_MAKE, returns an empty string
    +
    +    e.g. if PARALLEL_MAKE = "-j 10", parallel_make_argument(d, "-n
    %d") will return
    +    "-n 10"
    +    """
    +    v = parallel_make(d)
    +    if v:
    +        if limit:
    +            v = max(limit, v)
    +        return fmt % v
    +    return ''
    +
      def packages_filter_out_system(d):
          """
          Return a list of packages from PACKAGES with the "system"
    packages such as
    diff --git a/meta/recipes-core/ovmf/ovmf_git.bb <http://ovmf_git.bb>
    b/meta/recipes-core/ovmf/ovmf_git.bb <http://ovmf_git.bb>
    index fa0d66291d1..8750b3c528d 100644
    --- a/meta/recipes-core/ovmf/ovmf_git.bb <http://ovmf_git.bb>
    +++ b/meta/recipes-core/ovmf/ovmf_git.bb <http://ovmf_git.bb>
    @@ -151,7 +151,7 @@ do_compile_class-native() {

      do_compile_class-target() {
          export LFLAGS="${LDFLAGS}"
    -    PARALLEL_JOBS="${@ '${PARALLEL_MAKE}'.replace('-j', '-n ')}"
    +    PARALLEL_JOBS="${@oe.utils.parallel_make_argument(d, '-n %d')}"
          OVMF_ARCH="X64"
          if [ "${TARGET_ARCH}" != "x86_64" ] ; then
              OVMF_ARCH="IA32"
    diff --git a/meta/recipes-support/boost/boost.inc
    b/meta/recipes-support/boost/boost.inc
    index 41fc90fb211..0461ec6fcf1 100644
    --- a/meta/recipes-support/boost/boost.inc
    +++ b/meta/recipes-support/boost/boost.inc
    @@ -135,29 +135,7 @@ BJAM_TOOLS   = "--ignore-site-config \

      # use PARALLEL_MAKE to speed up the build, but limit it by -j 64,
    greater parallelism causes bjam to segfault or to ignore -j
      # https://svn.boost.org/trac/boost/ticket/7634
    <https://svn.boost.org/trac/boost/ticket/7634>
    -def get_boost_parallel_make(d):
    -    pm = d.getVar('PARALLEL_MAKE')
    -    if pm:
    -        # look for '-j' and throw other options (e.g. '-l') away
    -        # because they might have different meaning in bjam
    -        pm = pm.split()
    -        while pm:
    -            v = None
    -            opt = pm.pop(0)
    -            if opt == '-j':
    -                v = pm.pop(0)
    -            elif opt.startswith('-j'):
    -                v = opt[2:].strip()
    -            else:
    -                v = None
    -
    -            if v:
    -                v = min(64, int(v))
    -                return '-j' + str(v)
    -
    -    return ""
    -
    -BOOST_PARALLEL_MAKE = "${@get_boost_parallel_make(d)}"
    +BOOST_PARALLEL_MAKE = "${@oe.utils.parallel_make_argument(d,
    '-j%d', limit=64)}"
      BJAM_OPTS    = '${BOOST_PARALLEL_MAKE} -d+2 -q \
                     ${BJAM_TOOLS} \
                     -sBOOST_BUILD_USER_CONFIG=${WORKDIR}/user-config.jam \
    --
    2.14.3

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