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77586dcdf7
When looking at the pwrite/pread/wc performance, it is useful to judge that against the performance of an ordinary CPU mmap. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/*
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* Copyright © 2008 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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* Eric Anholt <eric@anholt.net>
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*
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*/
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#include <unistd.h>
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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/ioctl.h>
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#include <sys/mman.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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#define OBJECT_SIZE 16384
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int main(int argc, char **argv)
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{
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int fd;
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struct drm_i915_gem_mmap arg;
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uint8_t expected[OBJECT_SIZE];
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uint8_t buf[OBJECT_SIZE];
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uint8_t *addr;
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int ret;
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int handle;
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fd = drm_open_any();
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memset(&arg, 0, sizeof(arg));
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arg.handle = 0x10101010;
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arg.offset = 0;
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arg.size = 4096;
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printf("Testing mmaping of bad object.\n");
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ret = ioctl(fd, DRM_IOCTL_I915_GEM_MMAP, &arg);
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assert(ret == -1 && errno == ENOENT);
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handle = gem_create(fd, OBJECT_SIZE);
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printf("Testing mmaping of newly created object.\n");
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arg.handle = handle;
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arg.offset = 0;
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arg.size = OBJECT_SIZE;
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ret = ioctl(fd, DRM_IOCTL_I915_GEM_MMAP, &arg);
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assert(ret == 0);
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addr = (uint8_t *)(uintptr_t)arg.addr_ptr;
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printf("Testing contents of newly created object.\n");
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memset(expected, 0, sizeof(expected));
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assert(memcmp(addr, expected, sizeof(expected)) == 0);
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printf("Testing coherency of writes and mmap reads.\n");
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memset(buf, 0, sizeof(buf));
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memset(buf + 1024, 0x01, 1024);
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memset(expected + 1024, 0x01, 1024);
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gem_write(fd, handle, 0, buf, OBJECT_SIZE);
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assert(memcmp(buf, addr, sizeof(buf)) == 0);
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printf("Testing that mapping stays after close\n");
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gem_close(fd, handle);
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assert(memcmp(buf, addr, sizeof(buf)) == 0);
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printf("Testing unmapping\n");
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munmap(addr, OBJECT_SIZE);
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close(fd);
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return 0;
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}
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