On Mon, 2008-12-15 at 15:08 -0800, Keith Packard wrote: > This limits application memory usage by waiting for the GPU to free memory > rather than simply continuing to allocate more memory.
I think I theoretically prefer the current behavior in the presence of
max_entries where you still alloc a new buffer (so you're not syncing)
but you free the buffer being unreferenced instead of adding it to the
cache.
Of course, I haven't run with max_entries yet since we shouldn't need
it.
> Signed-off-by: Keith Packard <kei...@keithp.com>
> ---
> libdrm/intel/intel_bufmgr_gem.c | 8 ++++++--
> 1 files changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/libdrm/intel/intel_bufmgr_gem.c b/libdrm/intel/intel_bufmgr_gem.c
> index 323007a..9f6ef68 100644
> --- a/libdrm/intel/intel_bufmgr_gem.c
> +++ b/libdrm/intel/intel_bufmgr_gem.c
> @@ -350,8 +350,12 @@ drm_intel_gem_bo_alloc(drm_intel_bufmgr *bufmgr, const
> char *name,
> bo_gem = bucket->head;
> busy.handle = bo_gem->gem_handle;
>
> - ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_BUSY, &busy);
> - alloc_from_cache = (ret == 0 && busy.busy == 0);
> + if (bucket->max_entries != -1 && bucket->num_entries >=
> bucket->max_entries)
> + alloc_from_cache = 1;
> + else {
> + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_BUSY, &busy);
> + alloc_from_cache = (ret == 0 && busy.busy == 0);
> + }
>
> if (alloc_from_cache) {
> bucket->head = bo_gem->next;
--
Eric Anholt
e...@anholt.net eric.anh...@intel.com
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