From 6c1e368cf38e02174a8c88218ae711ab0b27954f Mon Sep 17 00:00:00 2001 From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= Date: Wed, 2 Sep 2015 14:57:55 +0200 Subject: [PATCH] u_upload_mgr: optimize u_upload_alloc This is probably the most called util function. It does almost nothing, yet it can consume 10% of the CPU on the profile. This drops it down to 5%. Reviewed-by: Brian Paul --- src/gallium/auxiliary/util/u_upload_mgr.c | 32 ++++++++++++++++--------------- 1 file changed, 17 insertions(+), 15 deletions(-) diff --git a/src/gallium/auxiliary/util/u_upload_mgr.c b/src/gallium/auxiliary/util/u_upload_mgr.c index 744ea2e..4c56084 100644 --- a/src/gallium/auxiliary/util/u_upload_mgr.c +++ b/src/gallium/auxiliary/util/u_upload_mgr.c @@ -186,37 +186,39 @@ enum pipe_error u_upload_alloc( struct u_upload_mgr *upload, struct pipe_resource **outbuf, void **ptr ) { - unsigned alloc_size = align( size, upload->alignment ); + unsigned alloc_size = align(size, upload->alignment); unsigned alloc_offset = align(min_out_offset, upload->alignment); + unsigned buffer_size = upload->buffer ? upload->buffer->width0 : 0; unsigned offset; - /* Init these return values here in case we fail below to make - * sure the caller doesn't get garbage values. - */ - *out_offset = ~0; - pipe_resource_reference(outbuf, NULL); - *ptr = NULL; - /* Make sure we have enough space in the upload buffer * for the sub-allocation. */ - if (!upload->buffer || - MAX2(upload->offset, alloc_offset) + alloc_size > upload->buffer->width0) { + if (unlikely(MAX2(upload->offset, alloc_offset) + alloc_size > buffer_size)) { enum pipe_error ret = u_upload_alloc_buffer(upload, alloc_offset + alloc_size); - if (ret != PIPE_OK) + if (unlikely(ret != PIPE_OK)) { + *out_offset = ~0; + pipe_resource_reference(outbuf, NULL); + *ptr = NULL; return ret; + } + + buffer_size = upload->buffer->width0; } offset = MAX2(upload->offset, alloc_offset); - if (!upload->map) { + if (unlikely(!upload->map)) { upload->map = pipe_buffer_map_range(upload->pipe, upload->buffer, offset, - upload->buffer->width0 - offset, + buffer_size - offset, upload->map_flags, &upload->transfer); - if (!upload->map) { + if (unlikely(!upload->map)) { upload->transfer = NULL; + *out_offset = ~0; + pipe_resource_reference(outbuf, NULL); + *ptr = NULL; return PIPE_ERROR_OUT_OF_MEMORY; } @@ -229,7 +231,7 @@ enum pipe_error u_upload_alloc( struct u_upload_mgr *upload, /* Emit the return values: */ *ptr = upload->map + offset; - pipe_resource_reference( outbuf, upload->buffer ); + pipe_resource_reference(outbuf, upload->buffer); *out_offset = offset; upload->offset = offset + alloc_size; -- 2.7.4