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5ef806bb5d
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>
108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
/*
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* Copyright © 2011 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Daniel Vetter <daniel.vetter@ffwll.ch>
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*
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*/
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/*
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* Testcase: Unreferencing of active buffers
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*
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* Execs buffers and immediately unreferences them, hence the kernel active list
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* will be the last one to hold a reference on them. Usually libdrm bo caching
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* prevents that by keeping another reference.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include "drm.h"
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#include "i915_drm.h"
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#include "drmtest.h"
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#include "intel_bufmgr.h"
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#include "intel_batchbuffer.h"
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#include "intel_gpu_tools.h"
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static drm_intel_bufmgr *bufmgr;
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struct intel_batchbuffer *batch;
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static drm_intel_bo *load_bo;
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int main(int argc, char **argv)
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{
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int fd, i;
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fd = drm_open_any();
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bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
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if (!bufmgr) {
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fprintf(stderr, "failed to init libdrm\n");
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exit(-1);
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}
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/* don't enable buffer reuse!! */
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//drm_intel_bufmgr_gem_enable_reuse(bufmgr);
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batch = intel_batchbuffer_alloc(bufmgr, intel_get_drm_devid(fd));
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assert(batch);
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/* put some load onto the gpu to keep the light buffers active for long
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* enough */
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for (i = 0; i < 1000; i++) {
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load_bo = drm_intel_bo_alloc(bufmgr, "target bo", 1024*4096, 4096);
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if (!load_bo) {
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fprintf(stderr, "failed to alloc target buffer\n");
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exit(-1);
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}
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BEGIN_BATCH(8);
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OUT_BATCH(XY_SRC_COPY_BLT_CMD |
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XY_SRC_COPY_BLT_WRITE_ALPHA |
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XY_SRC_COPY_BLT_WRITE_RGB);
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OUT_BATCH((3 << 24) | /* 32 bits */
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(0xcc << 16) | /* copy ROP */
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4096);
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OUT_BATCH(0); /* dst x1,y1 */
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OUT_BATCH((1024 << 16) | 512);
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OUT_RELOC(load_bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 0);
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OUT_BATCH((0 << 16) | 512); /* src x1, y1 */
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OUT_BATCH(4096);
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OUT_RELOC(load_bo, I915_GEM_DOMAIN_RENDER, 0, 0);
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ADVANCE_BATCH();
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intel_batchbuffer_flush(batch);
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drm_intel_bo_disable_reuse(load_bo);
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drm_intel_bo_unreference(load_bo);
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}
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drm_intel_bufmgr_destroy(bufmgr);
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close(fd);
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return 0;
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}
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