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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2015-05-12 15:25:03 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2015-05-12 15:35:32 +0100 |
| commit | 2ce298cf13f023d50132658e1ff7569e7507c5c6 (patch) | |
| tree | 624a63ee60e431c2db39b1220c1c17359aecc29f /tests/gem_streaming_writes.c | |
| parent | 27cf5847dc9f14417b4a51a0b21213ba8ff04ebd (diff) | |
igt/gem_stream_writes: Use execbuf LUT to shave a few cycles off dispatch
Since our goal is to have concurrent read/writes of GPU buffers, we want
to spend as little time in between as possible.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'tests/gem_streaming_writes.c')
| -rw-r--r-- | tests/gem_streaming_writes.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/tests/gem_streaming_writes.c b/tests/gem_streaming_writes.c index d42a184a..d1a1b42f 100644 --- a/tests/gem_streaming_writes.c +++ b/tests/gem_streaming_writes.c @@ -51,8 +51,15 @@ #define BLT_WRITE_RGB (1<<20) #define BLT_WRITE_ARGB (BLT_WRITE_ALPHA | BLT_WRITE_RGB) +#define LOCAL_I915_EXEC_HANDLE_LUT (1<<12) + IGT_TEST_DESCRIPTION("Test of streaming writes into active GPU sources"); +static bool __gem_execbuf(int fd, struct drm_i915_gem_execbuffer2 *eb) +{ + return drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, eb) == 0; +} + static void test_streaming(int fd, int mode) { const int has_64bit_reloc = intel_gen(intel_get_drm_devid(fd)) >= 8; @@ -98,7 +105,11 @@ static void test_streaming(int fd, int mode) memset(&execbuf, 0, sizeof(execbuf)); execbuf.buffers_ptr = (uintptr_t)exec; execbuf.buffer_count = 2; - gem_execbuf(fd, &execbuf); + execbuf.flags = LOCAL_I915_EXEC_HANDLE_LUT; + if (!__gem_execbuf(fd, &execbuf)) { + execbuf.flags = 0; + gem_execbuf(fd, &execbuf); + } /* We assume that the active objects are fixed to avoid relocations */ __src_offset = src_offset; __dst_offset = dst_offset; @@ -107,7 +118,7 @@ static void test_streaming(int fd, int mode) for (i = 0; i < 64; i++) { reloc[2*i+0].offset = 64*i + 4 * sizeof(uint32_t); reloc[2*i+0].delta = 0; - reloc[2*i+0].target_handle = dst; + reloc[2*i+0].target_handle = execbuf.flags & LOCAL_I915_EXEC_HANDLE_LUT ? 0 : dst; reloc[2*i+0].presumed_offset = dst_offset; reloc[2*i+0].read_domains = I915_GEM_DOMAIN_RENDER; reloc[2*i+0].write_domain = I915_GEM_DOMAIN_RENDER; @@ -116,7 +127,7 @@ static void test_streaming(int fd, int mode) if (has_64bit_reloc) reloc[2*i+1].offset += sizeof(uint32_t); reloc[2*i+1].delta = 0; - reloc[2*i+1].target_handle = src; + reloc[2*i+1].target_handle = execbuf.flags & LOCAL_I915_EXEC_HANDLE_LUT ? 1 : src; reloc[2*i+1].presumed_offset = src_offset; reloc[2*i+1].read_domains = I915_GEM_DOMAIN_RENDER; reloc[2*i+1].write_domain = 0; @@ -124,7 +135,7 @@ static void test_streaming(int fd, int mode) exec[2].relocation_count = 2; execbuf.buffer_count = 3; - execbuf.flags = I915_EXEC_NO_RELOC; + execbuf.flags |= I915_EXEC_NO_RELOC; if (gem_has_blt(fd)) execbuf.flags |= I915_EXEC_BLT; |