KonstantinSeurer
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vc4: Just stream out fallback IB contents. 

The idea I had when I wrote the original shadow code was that you'd see a
set_index_buffer to the IB, then a bunch of draws out of it.  What's
actually happening in openarena is that set_index_buffer occurs at every
draw, so we end up making a new shadow BO every time, and converting more
of the BO than is actually used in the draw.

While I could maybe come up with a better caching scheme, for now just
do the simple thing that doesn't result in a new shadow IB allocation
per draw.

Improves performance of isosurf in drawelements mode by 58.7967% +/-
3.86152% (n=8).
This commit is contained in:
Eric Anholt 2015-04-14 22:42:02 -07:00
parent f8de6277bf
commit 10aacf5ae8
6 changed files with 41 additions and 42 deletions
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7
src/gallium/drivers/vc4/vc4_context.c
View File

@ -29,6 +29,7 @@
#include "util/u_inlines.h"
#include "util/u_memory.h"
#include "util/u_blitter.h"
#include "util/u_upload_mgr.h"
#include "indices/u_primconvert.h"
#include "pipe/p_screen.h"
@ -410,6 +411,9 @@ vc4_context_destroy(struct pipe_context *pctx)
if (vc4->primconvert)
util_primconvert_destroy(vc4->primconvert);
if (vc4->uploader)
u_upload_destroy(vc4->uploader);
util_slab_destroy(&vc4->transfer_pool);
pipe_surface_reference(&vc4->framebuffer.cbufs[0], NULL);
@ -466,6 +470,9 @@ vc4_context_create(struct pipe_screen *pscreen, void *priv)
if (!vc4->primconvert)
goto fail;
vc4->uploader = u_upload_create(pctx, 16 * 1024, 4,
PIPE_BIND_INDEX_BUFFER);
vc4_debug |= saved_shaderdb_flag;
return &vc4->base;

2
src/gallium/drivers/vc4/vc4_context.h
View File

@ -243,6 +243,8 @@ struct vc4_context {
/** Seqno of the last CL flush's job. */
uint64_t last_emit_seqno;
struct u_upload_mgr *uploader;
/** @{ Current pipeline state objects */
struct pipe_scissor_state scissor;
struct pipe_blend_state *blend;

15
src/gallium/drivers/vc4/vc4_draw.c
View File

@ -266,13 +266,17 @@ vc4_draw_vbo(struct pipe_context *pctx, const struct pipe_draw_info *info)
* definitions, up to but not including QUADS.
*/
if (info->indexed) {
struct vc4_resource *rsc = vc4_resource(vc4->indexbuf.buffer);
uint32_t offset = vc4->indexbuf.offset;
uint32_t index_size = vc4->indexbuf.index_size;
if (rsc->shadow_parent) {
vc4_update_shadow_index_buffer(pctx, &vc4->indexbuf);
offset = 0;
struct pipe_resource *prsc;
if (vc4->indexbuf.index_size == 4) {
prsc = vc4_get_shadow_index_buffer(pctx, &vc4->indexbuf,
info->count, &offset);
index_size = 2;
} else {
prsc = vc4->indexbuf.buffer;
}
struct vc4_resource *rsc = vc4_resource(prsc);
cl_start_reloc(&vc4->bcl, 1);
cl_u8(&vc4->bcl, VC4_PACKET_GL_INDEXED_PRIMITIVE);
@ -284,6 +288,9 @@ vc4_draw_vbo(struct pipe_context *pctx, const struct pipe_draw_info *info)
cl_u32(&vc4->bcl, info->count);
cl_reloc(vc4, &vc4->bcl, rsc->bo, offset);
cl_u32(&vc4->bcl, max_index);
if (vc4->indexbuf.index_size == 4)
pipe_resource_reference(&prsc, NULL);
} else {
cl_u8(&vc4->bcl, VC4_PACKET_GL_ARRAY_PRIMITIVE);
cl_u8(&vc4->bcl, info->mode);

33
src/gallium/drivers/vc4/vc4_resource.c
View File

@ -26,6 +26,7 @@
#include "util/u_format.h"
#include "util/u_inlines.h"
#include "util/u_surface.h"
#include "util/u_upload_mgr.h"
#include "vc4_screen.h"
#include "vc4_context.h"
@ -638,41 +639,37 @@ vc4_update_shadow_baselevel_texture(struct pipe_context *pctx,
* was in user memory, it would be nice to not have uploaded it to a VBO
* before translating.
*/
void
vc4_update_shadow_index_buffer(struct pipe_context *pctx,
const struct pipe_index_buffer *ib)
struct pipe_resource *
vc4_get_shadow_index_buffer(struct pipe_context *pctx,
const struct pipe_index_buffer *ib,
uint32_t count,
uint32_t *shadow_offset)
{
struct vc4_resource *shadow = vc4_resource(ib->buffer);
struct vc4_resource *orig = vc4_resource(shadow->shadow_parent);
uint32_t count = shadow->base.b.width0 / 2;
if (shadow->writes == orig->writes)
return;
struct vc4_context *vc4 = vc4_context(pctx);
struct vc4_resource *orig = vc4_resource(ib->buffer);
perf_debug("Fallback conversion for %d uint indices\n", count);
void *data;
struct pipe_resource *shadow_rsc = NULL;
u_upload_alloc(vc4->uploader, 0, count * 2,
shadow_offset, &shadow_rsc, &data);
uint16_t *dst = data;
struct pipe_transfer *src_transfer;
uint32_t *src = pipe_buffer_map_range(pctx, &orig->base.b,
ib->offset,
count * 4,
PIPE_TRANSFER_READ, &src_transfer);
struct pipe_transfer *dst_transfer;
uint16_t *dst = pipe_buffer_map_range(pctx, &shadow->base.b,
0,
count * 2,
PIPE_TRANSFER_WRITE, &dst_transfer);
for (int i = 0; i < count; i++) {
uint32_t src_index = src[i];
assert(src_index <= 0xffff);
dst[i] = src_index;
}
pctx->transfer_unmap(pctx, dst_transfer);
pctx->transfer_unmap(pctx, src_transfer);
shadow->writes = orig->writes;
return shadow_rsc;
}
void

6
src/gallium/drivers/vc4/vc4_resource.h
View File

@ -107,8 +107,10 @@ struct pipe_resource *vc4_resource_create(struct pipe_screen *pscreen,
const struct pipe_resource *tmpl);
void vc4_update_shadow_baselevel_texture(struct pipe_context *pctx,
struct pipe_sampler_view *view);
void vc4_update_shadow_index_buffer(struct pipe_context *pctx,
const struct pipe_index_buffer *ib);
struct pipe_resource *vc4_get_shadow_index_buffer(struct pipe_context *pctx,
const struct pipe_index_buffer *ib,
uint32_t count,
uint32_t *offset);
void vc4_dump_surface(struct pipe_surface *psurf);
#endif /* VC4_RESOURCE_H */

20
src/gallium/drivers/vc4/vc4_state.c
View File

@ -304,24 +304,8 @@ vc4_set_index_buffer(struct pipe_context *pctx,
if (ib) {
assert(!ib->user_buffer);
if (ib->index_size == 4) {
struct pipe_resource tmpl = *ib->buffer;
assert(tmpl.format == PIPE_FORMAT_R8_UNORM);
assert(tmpl.height0 == 1);
tmpl.width0 = (tmpl.width0 - ib->offset) / 2;
struct pipe_resource *pshadow =
vc4_resource_create(&vc4->screen->base, &tmpl);
struct vc4_resource *shadow = vc4_resource(pshadow);
pipe_resource_reference(&shadow->shadow_parent, ib->buffer);
pipe_resource_reference(&vc4->indexbuf.buffer, NULL);
vc4->indexbuf.buffer = pshadow;
vc4->indexbuf.index_size = 2;
} else {
pipe_resource_reference(&vc4->indexbuf.buffer, ib->buffer);
vc4->indexbuf.index_size = ib->index_size;
}
pipe_resource_reference(&vc4->indexbuf.buffer, ib->buffer);
vc4->indexbuf.index_size = ib->index_size;
vc4->indexbuf.offset = ib->offset;
} else {
pipe_resource_reference(&vc4->indexbuf.buffer, NULL);