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]>
---
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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