Re: [LTP] [PATCH 2/4] cpu_hotplug: add get_hotplug_cpus, get_present_cpus

[Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com>]

On 04/29/2015 02:17 PM, Jan Stancek wrote:
> From: Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com>
>
> Signed-off-by: Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com>
> Signed-off-by: Jan Stancek <jstancek@redhat.com>
> ---
>   .../cpu_hotplug/include/cpuhotplug_hotplug.sh      | 73 +++++++++++++++++++++-
>   1 file changed, 70 insertions(+), 3 deletions(-)
>
> diff --git a/testcases/kernel/hotplug/cpu_hotplug/include/cpuhotplug_hotplug.sh b/testcases/kernel/hotplug/cpu_hotplug/include/cpuhotplug_hotplug.sh
> index f553d0c..a1c6ef6 100644
> --- a/testcases/kernel/hotplug/cpu_hotplug/include/cpuhotplug_hotplug.sh
> +++ b/testcases/kernel/hotplug/cpu_hotplug/include/cpuhotplug_hotplug.sh
> @@ -126,11 +126,78 @@ get_cpus_num()
>   #
>   get_all_cpus()
>   {
> -    [ -d /sys/devices/system/cpu/cpu0 ] || return 1
> -    ls -dr /sys/devices/system/cpu/cpu[0-9]* | \
> -        sed "s/\/sys\/devices\/system\/cpu\///g" || return 2
> +    [ -d /sys/devices/system/cpu ] || return 1
> +    (cd /sys/devices/system/cpu; ls -d cpu[0-9]*)
>   }
>
> +# get_present_cpus()
> +#
> +#  Prints a list of present CPUs, regardless of whether they're
> +#  currently online or offline.
> +#
> +get_present_cpus()
> +{
> +    # if sysfs present mask is missing, assume all cpu are present
> +    if [ ! -e /sys/devices/system/cpu/present ]; then
> +        get_all_cpus
> +        return
> +    fi
> +
> +    local present_mask="/sys/devices/system/cpu/present"
Maybe use this variable in the above 'if [ ! -e 
/sys/devices/system/cpu/present]' ?


> +    local present_cpus=""
> +
> +    for part in $(cat $present_mask | tr "," " "); do
> +        if echo $part | grep -q "-"; then
> +            range_low=$(echo $part | cut -d - -f 1)
> +            range_high=$(echo $part | cut -d - -f 2)
> +        else
> +            range_low=$(part)
> +            range_high=$(part)
> +        fi
> +        for cpu in $(seq $range_low $range_high); do
> +            if [ -e /sys/devices/system/cpu/cpu$cpu ]; then
> +                present_cpus="$present_cpus cpu$cpu"
> +            fi
> +        done
> +    done
> +    echo $present_cpus
> +}
> +
> +# get_present_cpus_num()
> +#
> +#  Prints the number of present CPUs
> +#
> +get_present_cpus_num()
> +{
> +    return $(get_present_cpus | wc -w)
> +}
> +
> +# get_hotplug_cpus()
> +#
> +#  Prints a list of present hotpluggable CPUs, regardless of whether they're
> +#  currently online or offline.
> +#
> +get_hotplug_cpus()
> +{
> +    local present_cpus=$(get_present_cpus)
> +    local hotplug_cpus=""
> +
> +    for cpu in $present_cpus; do
> +        if [ -e /sys/devices/system/cpu/$cpu/online ]; then
> +            hotplug_cpus="$hotplug_cpus $cpu"
> +	fi
> +    done
> +    echo $hotplug_cpus
> +}
> +
> +# get_hotplug_cpus_num()
> +#
> +#  Prints the number of hotpluggable CPUs
> +#
> +get_hotplug_cpus_num()
> +{
> +    return $(get_hotplug_cpus | wc -w)
> +}
>
>   # get_all_cpu_states()
>   #
>

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