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r600g: add bo busy backoff.

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When we go to do a lot of bos in one draw like constant bufs we need
to avoid bouncing off the busy ioctl, this mitigates by backing off
on busy bos for a short amount of times.
This commit is contained in:
Dave Airlie 2010-10-05 15:51:38 +10:00
parent 49866c8f34
commit 05813ad5f4
2 changed files with 15 additions and 0 deletions
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2
src/gallium/winsys/r600/drm/r600_priv.h
View file

@ -66,6 +66,8 @@ struct radeon_bo {
void *data;
struct list_head fencedlist;
boolean shared;
int64_t last_busy;
boolean set_busy;
};
struct r600_bo {

13
src/gallium/winsys/r600/drm/radeon_bo.c
View file

@ -32,6 +32,7 @@
#include "r600_priv.h"
#include "xf86drm.h"
#include "radeon_drm.h"
#include "util/u_time.h"
static int radeon_bo_fixed_map(struct radeon *radeon, struct radeon_bo *bo)
{
@ -170,14 +171,23 @@ int radeon_bo_wait(struct radeon *radeon, struct radeon_bo *bo)
return ret;
}
#define BO_BUSY_BACKOFF 10000
int radeon_bo_busy(struct radeon *radeon, struct radeon_bo *bo, uint32_t *domain)
{
struct drm_radeon_gem_busy args;
int ret;
int64_t now;
now = os_time_get();
if (LIST_IS_EMPTY(&bo->fencedlist) && !bo->shared)
return 0;
if (bo->set_busy && (now - bo->last_busy < BO_BUSY_BACKOFF))
return -EBUSY;
bo->set_busy = FALSE;
memset(&args, 0, sizeof(args));
args.handle = bo->handle;
args.domain = 0;
@ -190,6 +200,9 @@ int radeon_bo_busy(struct radeon *radeon, struct radeon_bo *bo, uint32_t *domain
LIST_FOR_EACH_ENTRY_SAFE(entry, tent, &bo->fencedlist, fencedlist) {
LIST_DELINIT(&entry->fencedlist);
}
} else {
bo->set_busy = TRUE;
bo->last_busy = now;
}
*domain = args.domain;
return ret;