AcoSail/kernel_optimize_test
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powerpc/spufs: Initialize ctx->stats.tstamp correctly

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spuctx_switch_state() warns if ktime goes backwards, but it
sometimes compares an uninitialized value, which showed that
the data was unreliable when we actually saw the warning.

Initialize it to the current time in order to get correct data.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Arnd Bergmann 2009-02-23 21:44:37 +00:00 committed by Benjamin Herrenschmidt
parent 9e1e3723be
commit 8f748aae4b
1 changed files with 4 additions and 0 deletions
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arch/powerpc/platforms/cell/spufs/context.c
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@ -35,6 +35,8 @@ atomic_t nr_spu_contexts = ATOMIC_INIT(0);
struct spu_context *alloc_spu_context(struct spu_gang *gang)
{
struct spu_context *ctx;
struct timespec ts;
ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
if (!ctx)
goto out;
@ -64,6 +66,8 @@ struct spu_context *alloc_spu_context(struct spu_gang *gang)
__spu_update_sched_info(ctx);
spu_set_timeslice(ctx);
ctx->stats.util_state = SPU_UTIL_IDLE_LOADED;
ktime_get_ts(&ts);
ctx->stats.tstamp = timespec_to_ns(&ts);
atomic_inc(&nr_spu_contexts);
goto out;