Re: [PATCH 2/4] drm/i915: Tune down debug output when context is banned

[Ben Widawsky <ben@bwidawsk.net>]

On Wed, Jan 29, 2014 at 05:05:37PM +0200, Mika Kuoppala wrote:
> If we have stopped rings then we know that test is running
> so no need for spam. In addition, only spam when default
> context gets banned.
> 
> v2: - make sure default context ban gets shown (Chris)
>     - use helper for checking for default context, everywhere (Chris)
> 
> Reference: https://bugs.freedesktop.org/show_bug.cgi?id=73652
> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.h         |    5 +++++
>  drivers/gpu/drm/i915/i915_gem.c         |    5 ++++-
>  drivers/gpu/drm/i915/i915_gem_context.c |    9 ++-------
>  3 files changed, 11 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 3673ba1..b34fd31 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -2271,6 +2271,11 @@ static inline void i915_gem_context_unreference(struct i915_hw_context *ctx)
>  		kref_put(&ctx->ref, i915_gem_context_free);
>  }
>  
> +static inline bool i915_gem_context_is_default(const struct i915_hw_context *c)
> +{
> +	return c->id == DEFAULT_CONTEXT_ID;
> +}
> +
>  int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
>  				  struct drm_file *file);
>  int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index e41d520..8f9ac0a 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -2319,7 +2319,10 @@ static bool i915_context_is_banned(const struct i915_hw_context *ctx)
>  		return true;
>  
>  	if (elapsed <= DRM_I915_CTX_BAN_PERIOD) {
> -		DRM_ERROR("context hanging too fast, declaring banned!\n");
> +		if (dev_priv->gpu_error.stop_rings == 0 &&
> +		    i915_gem_context_is_default(ctx))
> +			DRM_ERROR("context hanging too fast, banning!\n");
> +

else DRM_DEBUG[_DRIVER](...)?

Reviewed-by: Ben Widawsky <ben@bwidawsk.net>

>  		return true;
>  	}
>  
> diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
> index 2b0598e..985c1ed 100644
> --- a/drivers/gpu/drm/i915/i915_gem_context.c
> +++ b/drivers/gpu/drm/i915/i915_gem_context.c
> @@ -228,11 +228,6 @@ err_out:
>  	return ERR_PTR(ret);
>  }
>  
> -static inline bool is_default_context(struct i915_hw_context *ctx)
> -{
> -	return (ctx->id == DEFAULT_CONTEXT_ID);
> -}
> -
>  /**
>   * The default context needs to exist per ring that uses contexts. It stores the
>   * context state of the GPU for applications that don't utilize HW contexts, as
> @@ -478,7 +473,7 @@ static int context_idr_cleanup(int id, void *p, void *data)
>  	struct i915_hw_context *ctx = p;
>  
>  	/* Ignore the default context because close will handle it */
> -	if (is_default_context(ctx))
> +	if (i915_gem_context_is_default(ctx))
>  		return 0;
>  
>  	i915_gem_context_unreference(ctx);
> @@ -656,7 +651,7 @@ static int do_switch(struct intel_ring_buffer *ring,
>  		vma->bind_vma(vma, to->obj->cache_level, GLOBAL_BIND);
>  	}
>  
> -	if (!to->is_initialized || is_default_context(to))
> +	if (!to->is_initialized || i915_gem_context_is_default(to))
>  		hw_flags |= MI_RESTORE_INHIBIT;
>  
>  	ret = mi_set_context(ring, to, hw_flags);
> -- 
> 1.7.9.5
> 
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-- 
Ben Widawsky, Intel Open Source Technology Center