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Code Issues Releases Wiki Activity

Only try to allocate memory on a opencl device if it actually has memory

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This commit is contained in:
Jens Steube 2023-04-11 10:17:32 +00:00
parent 234e6cf49f
commit b1ca2ca539
2 changed files with 76 additions and 71 deletions
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2
include/backend.h
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@ -48,6 +48,8 @@ void generate_cached_kernel_mp_filename (const u32 opti_type, const u64 opts
void generate_source_kernel_amp_filename (const u32 attack_kern, char *shared_dir, char *source_file);
void generate_cached_kernel_amp_filename (const u32 attack_kern, char *cache_dir, const char *device_name_chksum, char *cached_file, bool is_metal);
bool read_kernel_binary (hashcat_ctx_t *hashcat_ctx, const char *kernel_file, size_t *kernel_lengths, char **kernel_sources);
int gidd_to_pw_t (hashcat_ctx_t *hashcat_ctx, hc_device_param_t *device_param, const u64 gidd, pw_t *pw);
int copy_pws_idx (hashcat_ctx_t *hashcat_ctx, hc_device_param_t *device_param, u64 gidd, const u64 cnt, pw_idx_t *dest);

145
src/backend.c
View File

@ -528,7 +528,7 @@ static bool opencl_test_instruction (hashcat_ctx_t *hashcat_ctx, cl_context cont
return true;
}
static bool read_kernel_binary (hashcat_ctx_t *hashcat_ctx, const char *kernel_file, size_t *kernel_lengths, char **kernel_sources)
bool read_kernel_binary (hashcat_ctx_t *hashcat_ctx, const char *kernel_file, size_t *kernel_lengths, char **kernel_sources)
{
HCFILE fp;
@ -6377,11 +6377,9 @@ int backend_ctx_devices_init (hashcat_ctx_t *hashcat_ctx, const int comptime)
// try CL_DEVICE_BOARD_NAME_AMD first, if it fails fall back to CL_DEVICE_NAME
// since AMD ROCm does not identify itself at this stage we simply check for return code from clGetDeviceInfo()
#define CHECK_BOARD_NAME_AMD 1
cl_int rc_board_name_amd = CL_INVALID_VALUE;
if (CHECK_BOARD_NAME_AMD)
if (device_param->opencl_device_type & CL_DEVICE_TYPE_GPU)
{
//backend_ctx_t *backend_ctx = hashcat_ctx->backend_ctx;
@ -7869,6 +7867,7 @@ int backend_ctx_devices_init (hashcat_ctx_t *hashcat_ctx, const int comptime)
backend_ctx->opencl_devices_active--;
backend_ctx->backend_devices_active--;
continue;
}
@ -7884,6 +7883,7 @@ int backend_ctx_devices_init (hashcat_ctx_t *hashcat_ctx, const int comptime)
backend_ctx->opencl_devices_active--;
backend_ctx->backend_devices_active--;
continue;
}
@ -7979,94 +7979,97 @@ int backend_ctx_devices_init (hashcat_ctx_t *hashcat_ctx, const int comptime)
*/
}
// available device memory
// available device memory
// This test causes an GPU memory usage spike.
// In case there are multiple hashcat instances starting at the same time this will cause GPU out of memory errors which otherwise would not exist.
// We will simply not run it if that device was skipped by the user.
#define MAX_ALLOC_CHECKS_CNT 8192
#define MAX_ALLOC_CHECKS_SIZE (64 * 1024 * 1024)
device_param->device_available_mem = device_param->device_global_mem - MAX_ALLOC_CHECKS_SIZE;
if (device_param->opencl_device_type & CL_DEVICE_TYPE_GPU)
if (device_param->device_global_mem)
{
// OK, so the problem here is the following:
// There's just CL_DEVICE_GLOBAL_MEM_SIZE to ask OpenCL about the total memory on the device,
// but there's no way to ask for available memory on the device.
// In combination, most OpenCL runtimes implementation of clCreateBuffer()
// are doing so called lazy memory allocation on the device.
// Now, if the user has X11 (or a game or anything that takes a lot of GPU memory)
// running on the host we end up with an error type of this:
// clEnqueueNDRangeKernel(): CL_MEM_OBJECT_ALLOCATION_FAILURE
// The clEnqueueNDRangeKernel() is because of the lazy allocation
// The best way to workaround this problem is if we would be able to ask for available memory,
// The idea here is to try to evaluate available memory by allocating it till it errors
#define MAX_ALLOC_CHECKS_CNT 8192
#define MAX_ALLOC_CHECKS_SIZE (64 * 1024 * 1024)
cl_mem *tmp_device = (cl_mem *) hccalloc (MAX_ALLOC_CHECKS_CNT, sizeof (cl_mem));
device_param->device_available_mem = device_param->device_global_mem - MAX_ALLOC_CHECKS_SIZE;
u64 c;
for (c = 0; c < MAX_ALLOC_CHECKS_CNT; c++)
if (device_param->opencl_device_type & CL_DEVICE_TYPE_GPU)
{
if (((c + 1 + 1) * MAX_ALLOC_CHECKS_SIZE) >= device_param->device_global_mem) break;
// OK, so the problem here is the following:
// There's just CL_DEVICE_GLOBAL_MEM_SIZE to ask OpenCL about the total memory on the device,
// but there's no way to ask for available memory on the device.
// In combination, most OpenCL runtimes implementation of clCreateBuffer()
// are doing so called lazy memory allocation on the device.
// Now, if the user has X11 (or a game or anything that takes a lot of GPU memory)
// running on the host we end up with an error type of this:
// clEnqueueNDRangeKernel(): CL_MEM_OBJECT_ALLOCATION_FAILURE
// The clEnqueueNDRangeKernel() is because of the lazy allocation
// The best way to workaround this problem is if we would be able to ask for available memory,
// The idea here is to try to evaluate available memory by allocating it till it errors
// work around, for some reason apple opencl can't have buffers larger 2^31
// typically runs into trap 6
// maybe 32/64 bit problem affecting size_t?
// this seems to affect global memory as well no just single allocations
cl_mem *tmp_device = (cl_mem *) hccalloc (MAX_ALLOC_CHECKS_CNT, sizeof (cl_mem));
if ((device_param->opencl_platform_vendor_id == VENDOR_ID_APPLE) && (device_param->is_metal == false))
u64 c;
for (c = 0; c < MAX_ALLOC_CHECKS_CNT; c++)
{
const size_t undocumented_single_allocation_apple = 0x7fffffff;
if (((c + 1 + 1) * MAX_ALLOC_CHECKS_SIZE) >= device_param->device_global_mem) break;
if (((c + 1 + 1) * MAX_ALLOC_CHECKS_SIZE) >= undocumented_single_allocation_apple) break;
// work around, for some reason apple opencl can't have buffers larger 2^31
// typically runs into trap 6
// maybe 32/64 bit problem affecting size_t?
// this seems to affect global memory as well no just single allocations
if ((device_param->opencl_platform_vendor_id == VENDOR_ID_APPLE) && (device_param->is_metal == false))
{
const size_t undocumented_single_allocation_apple = 0x7fffffff;
if (((c + 1 + 1) * MAX_ALLOC_CHECKS_SIZE) >= undocumented_single_allocation_apple) break;
}
cl_int CL_err;
OCL_PTR *ocl = (OCL_PTR *) backend_ctx->ocl;
tmp_device[c] = ocl->clCreateBuffer (context, CL_MEM_READ_WRITE, MAX_ALLOC_CHECKS_SIZE, NULL, &CL_err);
if (CL_err != CL_SUCCESS)
{
c--;
break;
}
// transfer only a few byte should be enough to force the runtime to actually allocate the memory
u8 tmp_host[8];
if (ocl->clEnqueueReadBuffer (command_queue, tmp_device[c], CL_TRUE, 0, sizeof (tmp_host), tmp_host, 0, NULL, NULL) != CL_SUCCESS) break;
if (ocl->clEnqueueWriteBuffer (command_queue, tmp_device[c], CL_TRUE, 0, sizeof (tmp_host), tmp_host, 0, NULL, NULL) != CL_SUCCESS) break;
if (ocl->clEnqueueReadBuffer (command_queue, tmp_device[c], CL_TRUE, MAX_ALLOC_CHECKS_SIZE - sizeof (tmp_host), sizeof (tmp_host), tmp_host, 0, NULL, NULL) != CL_SUCCESS) break;
if (ocl->clEnqueueWriteBuffer (command_queue, tmp_device[c], CL_TRUE, MAX_ALLOC_CHECKS_SIZE - sizeof (tmp_host), sizeof (tmp_host), tmp_host, 0, NULL, NULL) != CL_SUCCESS) break;
}
cl_int CL_err;
device_param->device_available_mem = MAX_ALLOC_CHECKS_SIZE;
OCL_PTR *ocl = (OCL_PTR *) backend_ctx->ocl;
tmp_device[c] = ocl->clCreateBuffer (context, CL_MEM_READ_WRITE, MAX_ALLOC_CHECKS_SIZE, NULL, &CL_err);
if (CL_err != CL_SUCCESS)
if (c > 0)
{
c--;
break;
device_param->device_available_mem *= c;
}
// transfer only a few byte should be enough to force the runtime to actually allocate the memory
// clean up
u8 tmp_host[8];
if (ocl->clEnqueueReadBuffer (command_queue, tmp_device[c], CL_TRUE, 0, sizeof (tmp_host), tmp_host, 0, NULL, NULL) != CL_SUCCESS) break;
if (ocl->clEnqueueWriteBuffer (command_queue, tmp_device[c], CL_TRUE, 0, sizeof (tmp_host), tmp_host, 0, NULL, NULL) != CL_SUCCESS) break;
if (ocl->clEnqueueReadBuffer (command_queue, tmp_device[c], CL_TRUE, MAX_ALLOC_CHECKS_SIZE - sizeof (tmp_host), sizeof (tmp_host), tmp_host, 0, NULL, NULL) != CL_SUCCESS) break;
if (ocl->clEnqueueWriteBuffer (command_queue, tmp_device[c], CL_TRUE, MAX_ALLOC_CHECKS_SIZE - sizeof (tmp_host), sizeof (tmp_host), tmp_host, 0, NULL, NULL) != CL_SUCCESS) break;
}
device_param->device_available_mem = MAX_ALLOC_CHECKS_SIZE;
if (c > 0)
{
device_param->device_available_mem *= c;
}
// clean up
for (c = 0; c < MAX_ALLOC_CHECKS_CNT; c++)
{
if (((c + 1 + 1) * MAX_ALLOC_CHECKS_SIZE) >= device_param->device_global_mem) break;
if (tmp_device[c] != NULL)
for (c = 0; c < MAX_ALLOC_CHECKS_CNT; c++)
{
if (hc_clReleaseMemObject (hashcat_ctx, tmp_device[c]) == -1) return -1;
}
}
if (((c + 1 + 1) * MAX_ALLOC_CHECKS_SIZE) >= device_param->device_global_mem) break;
hcfree (tmp_device);
if (tmp_device[c] != NULL)
{
if (hc_clReleaseMemObject (hashcat_ctx, tmp_device[c]) == -1) return -1;
}
}
hcfree (tmp_device);
}
}
hc_clReleaseCommandQueue (hashcat_ctx, command_queue);