On Fri, 2008-07-04 at 21:05 +0200, [EMAIL PROTECTED] wrote:
> plain text document attachment
> (0004-powerpc-spufs-add-atomic-busy_spus-counter-to-struc.patch)
> As nr_active counter includes also spus waiting for syscalls to return
> we need a seperate counter that only counts spus that are currently running
> on spu side. This counter shall be used by a cpufreq governor that targets
> a frequency dependent from the number of running spus.
>
> From: Maxim Shchetynin <[EMAIL PROTECTED]>
> Signed-off-by: Christian Krafft <[EMAIL PROTECTED]>
This needs your S-O-B, Arnd, and should go via jk.
Cheers,
Ben.
> ---
> arch/powerpc/platforms/cell/spufs/sched.c | 6 ++++++
> include/asm-powerpc/spu.h | 1 +
> 2 files changed, 7 insertions(+), 0 deletions(-)
>
> diff --git a/arch/powerpc/platforms/cell/spufs/sched.c
> b/arch/powerpc/platforms/cell/spufs/sched.c
> index e929e70..be77910 100644
> --- a/arch/powerpc/platforms/cell/spufs/sched.c
> +++ b/arch/powerpc/platforms/cell/spufs/sched.c
> @@ -993,6 +993,7 @@ void spuctx_switch_state(struct spu_context *ctx,
> struct timespec ts;
> struct spu *spu;
> enum spu_utilization_state old_state;
> + int node;
>
> ktime_get_ts(&ts);
> curtime = timespec_to_ns(&ts);
> @@ -1014,6 +1015,11 @@ void spuctx_switch_state(struct spu_context *ctx,
> spu->stats.times[old_state] += delta;
> spu->stats.util_state = new_state;
> spu->stats.tstamp = curtime;
> + node = spu->node;
> + if (old_state == SPU_UTIL_USER)
> + atomic_dec(&cbe_spu_info[node].busy_spus);
> + if (new_state == SPU_UTIL_USER);
> + atomic_inc(&cbe_spu_info[node].busy_spus);
> }
> }
>
> diff --git a/include/asm-powerpc/spu.h b/include/asm-powerpc/spu.h
> index 99348c1..8b2eb04 100644
> --- a/include/asm-powerpc/spu.h
> +++ b/include/asm-powerpc/spu.h
> @@ -191,6 +191,7 @@ struct cbe_spu_info {
> struct list_head spus;
> int n_spus;
> int nr_active;
> + atomic_t busy_spus;
> atomic_t reserved_spus;
> };
>
> --
> 1.5.4.3
>
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