diff options
author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2011-10-28 17:39:14 +0200 |
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committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2011-10-28 17:40:23 +0200 |
commit | 5ef806bb5d4767eeeb6ec926b8af7044c98d47a0 (patch) | |
tree | 47e1962767af499c8a4e51dd676ba5dd5827289d /tests/gem_unref_active_buffers.c | |
parent | 1f4c37a6e91c74553afe3e67ac5e4703c85e6dbc (diff) |
tests: add gem_unref_active_buffers
The crucial trick to reproduce the bug is that we need to have
a decent pile of active bos to retire. Because we unref the bo
after having it moved off the active list, our recursion depth
in fdo bug #42180 is limited by the number of active objects that
can retire at the same time.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=42180
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'tests/gem_unref_active_buffers.c')
-rw-r--r-- | tests/gem_unref_active_buffers.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/tests/gem_unref_active_buffers.c b/tests/gem_unref_active_buffers.c new file mode 100644 index 00000000..aa29c1de --- /dev/null +++ b/tests/gem_unref_active_buffers.c @@ -0,0 +1,107 @@ +/* + * Copyright © 2011 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + * + * Authors: + * Daniel Vetter <daniel.vetter@ffwll.ch> + * + */ + +/* + * Testcase: Unreferencing of active buffers + * + * Execs buffers and immediately unreferences them, hence the kernel active list + * will be the last one to hold a reference on them. Usually libdrm bo caching + * prevents that by keeping another reference. + */ +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <assert.h> +#include <fcntl.h> +#include <inttypes.h> +#include <errno.h> +#include <sys/stat.h> +#include <sys/time.h> +#include "drm.h" +#include "i915_drm.h" +#include "drmtest.h" +#include "intel_bufmgr.h" +#include "intel_batchbuffer.h" +#include "intel_gpu_tools.h" + +static drm_intel_bufmgr *bufmgr; +struct intel_batchbuffer *batch; +static drm_intel_bo *load_bo; + +int main(int argc, char **argv) +{ + int fd, i; + + fd = drm_open_any(); + + bufmgr = drm_intel_bufmgr_gem_init(fd, 4096); + if (!bufmgr) { + fprintf(stderr, "failed to init libdrm\n"); + exit(-1); + } + /* don't enable buffer reuse!! */ + //drm_intel_bufmgr_gem_enable_reuse(bufmgr); + + batch = intel_batchbuffer_alloc(bufmgr, intel_get_drm_devid(fd)); + assert(batch); + + /* put some load onto the gpu to keep the light buffers active for long + * enough */ + for (i = 0; i < 1000; i++) { + load_bo = drm_intel_bo_alloc(bufmgr, "target bo", 1024*4096, 4096); + if (!load_bo) { + fprintf(stderr, "failed to alloc target buffer\n"); + exit(-1); + } + + BEGIN_BATCH(8); + OUT_BATCH(XY_SRC_COPY_BLT_CMD | + XY_SRC_COPY_BLT_WRITE_ALPHA | + XY_SRC_COPY_BLT_WRITE_RGB); + OUT_BATCH((3 << 24) | /* 32 bits */ + (0xcc << 16) | /* copy ROP */ + 4096); + OUT_BATCH(0); /* dst x1,y1 */ + OUT_BATCH((1024 << 16) | 512); + OUT_RELOC(load_bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 0); + OUT_BATCH((0 << 16) | 512); /* src x1, y1 */ + OUT_BATCH(4096); + OUT_RELOC(load_bo, I915_GEM_DOMAIN_RENDER, 0, 0); + ADVANCE_BATCH(); + + intel_batchbuffer_flush(batch); + + drm_intel_bo_disable_reuse(load_bo); + drm_intel_bo_unreference(load_bo); + } + + drm_intel_bufmgr_destroy(bufmgr); + + close(fd); + + return 0; +} |