On Thu, Jul 21, 2011 at 10:08:47AM +0800, Wen Congyang wrote:
> ---
> src/libvirt_private.syms | 4 ++
> src/util/cgroup.c | 81 ++++++++++++++++++++++++++++++++++++++++++++--
> src/util/cgroup.h | 6 +++
> 3 files changed, 88 insertions(+), 3 deletions(-)
> +int virCgroupSetCpuCfsPeriod(virCgroupPtr group, unsigned long long cfs_period)
> +{
> + /* The cfs_period shoule be greater or equal than 1ms, and less or equal
> + * than 1s.
> + */
> + if (cfs_period < 1000 || cfs_period > 1000000)
> + return -EINVAL;
> +
> + return virCgroupSetValueU64(group,
> + VIR_CGROUP_CONTROLLER_CPU,
> + "cpu.cfs_period_us", cfs_period);
> +}
> +int virCgroupGetCpuCfsPeriod(virCgroupPtr group, unsigned long long *cfs_period)
> +{
> + return virCgroupGetValueU64(group,
> + VIR_CGROUP_CONTROLLER_CPU,
> + "cpu.cfs_period_us", cfs_period);
> +}
BTW, what kernel version is required for this support ? In my Fedora 15
kernels I only see rt_period_us, no cfs_period_us, and I can't find it
in the latest 3.0 kernel tree either ?
Daniel
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