From 5ef806bb5d4767eeeb6ec926b8af7044c98d47a0 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Fri, 28 Oct 2011 17:39:14 +0200 Subject: 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 --- tests/gem_unref_active_buffers.c | 107 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 107 insertions(+) create mode 100644 tests/gem_unref_active_buffers.c (limited to 'tests/gem_unref_active_buffers.c') 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 + * + */ + +/* + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#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; +} -- cgit v1.2.3