RFR: JDK-8244615 build-performance.m4 is not always parsing /proc/cpuinfo correctly

[Erik Joelsson]

Looks good.

/Erik

On 2020-05-07 08:11, Magnus Ihse Bursie wrote:
> On some systems the format of /proc/cpuinfo differs from what 
> build-performance.m4 expects. This patch will look for lines beginning 
> with "CPU" if no lines with "processor" is found.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8244615
> Patch inline:
> diff --git a/make/autoconf/build-performance.m4 
> b/make/autoconf/build-performance.m4
> --- a/make/autoconf/build-performance.m4
> +++ b/make/autoconf/build-performance.m4
> @@ -32,7 +32,12 @@
>    if test -f /proc/cpuinfo; then
>      # Looks like a Linux (or cygwin) system
>      NUM_CORES=`cat /proc/cpuinfo  | grep -c processor`
> -    FOUND_CORES=yes
> +    if test "$NUM_CORES" -eq "0"; then
> +      NUM_CORES=`cat /proc/cpuinfo  | grep -c ^CPU`
> +    fi
> +    if test "$NUM_CORES" -ne "0"; then
> +      FOUND_CORES=yes
> +    fi
>    elif test -x /usr/sbin/psrinfo; then
>      # Looks like a Solaris system
>      NUM_CORES=`/usr/sbin/psrinfo -v | grep -c on-line`
>
> /Magnus