diff options
author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-03-20 14:24:14 +0100 |
---|---|---|
committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-03-20 14:27:05 +0100 |
commit | 16c4f52782e0df88f818dadd4586ea99ccf992d5 (patch) | |
tree | 62f33849bda3200e1672af7a19a466df91bfe1f6 | |
parent | c4ae3bc41204c83a89369af91217daa33fff9675 (diff) |
tests: add gem_mmap_offset_exhaustion
This also adds a gem_madvise helper to lib/drmtest.c
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
-rw-r--r-- | lib/drmtest.c | 14 | ||||
-rw-r--r-- | lib/drmtest.h | 1 | ||||
-rw-r--r-- | tests/Makefile.am | 1 | ||||
-rw-r--r-- | tests/gem_mmap_offset_exhaustion.c | 96 |
4 files changed, 112 insertions, 0 deletions
diff --git a/lib/drmtest.c b/lib/drmtest.c index 5caf71b2..0f021902 100644 --- a/lib/drmtest.c +++ b/lib/drmtest.c @@ -289,6 +289,20 @@ uint64_t gem_mappable_aperture_size(void) return pci_dev->regions[bar].size; } +int gem_madvise(int fd, uint32_t handle, int state) +{ + struct drm_i915_gem_madvise madv; + int ret; + + madv.handle = handle; + madv.madv = state; + madv.retained = 1; + ret = drmIoctl(fd, DRM_IOCTL_I915_GEM_MADVISE, &madv); + assert(ret == 0); + + return madv.retained; +} + /* signal interrupt helpers */ static pid_t signal_helper = -1; long long int sig_stat; diff --git a/lib/drmtest.h b/lib/drmtest.h index a8438abd..9f194448 100644 --- a/lib/drmtest.h +++ b/lib/drmtest.h @@ -51,6 +51,7 @@ uint32_t gem_create(int fd, int size); void *gem_mmap(int fd, uint32_t handle, int size, int prot); uint64_t gem_aperture_size(int fd); uint64_t gem_mappable_aperture_size(void); +int gem_madvise(int fd, uint32_t handle, int state); /* generally useful helpers */ void drmtest_fork_signal_helper(void); diff --git a/tests/Makefile.am b/tests/Makefile.am index 8df25726..4f2a30b6 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -18,6 +18,7 @@ TESTS_progs = \ gem_ringfill \ gem_mmap \ gem_mmap_gtt \ + gem_mmap_offset_exhaustion \ gem_pwrite \ gem_pread_after_blit \ gem_tiled_pread \ diff --git a/tests/gem_mmap_offset_exhaustion.c b/tests/gem_mmap_offset_exhaustion.c new file mode 100644 index 00000000..51ae5990 --- /dev/null +++ b/tests/gem_mmap_offset_exhaustion.c @@ -0,0 +1,96 @@ +/* + * Copyright © 2012 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> + * + */ + +#include <unistd.h> +#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/ioctl.h> +#include <sys/mman.h> +#include "drm.h" +#include "i915_drm.h" +#include "drmtest.h" + +#define OBJECT_SIZE (1024*1024) + +/* Testcase: checks whether the kernel handles mmap offset exhaustion correctly + * + * Currently the kernel doesn't reap the mmap offset of purged objects, albeit + * there's nothing that prevents it ABI-wise and it helps to get out of corners + * (because drm_mm is only 32bit on 32bit archs unfortunately. + * + * Note that on 64bit machines we have plenty of address space (because drm_mm + * uses unsigned long). + */ + +static void +create_and_map_bo(int fd) +{ + uint32_t handle; + char *ptr; + + handle = gem_create(fd, OBJECT_SIZE); + + ptr = gem_mmap(fd, handle, OBJECT_SIZE, PROT_READ | PROT_WRITE); + + if (!ptr) { + fprintf(stderr, "mmap failed\n"); + assert(ptr); + } + + /* touch it to force it into the gtt */ + *ptr = 0; + + /* but then unmap it again because we only have limited address space on + * 32 bit */ + munmap(ptr, OBJECT_SIZE); + + /* we happily leak objects to exhaust mmap offset space, the kernel will + * reap backing storage. */ + gem_madvise(fd, handle, I915_MADV_DONTNEED); +} + +int main(int argc, char **argv) +{ + int fd, i; + + fd = drm_open_any(); + + /* we have 32bit of address space, so try to fit one MB more + * than that. */ + for (i = 0; i < 4096 + 1; i++) + create_and_map_bo(fd); + + close(fd); + + return 0; +} |