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36 * \brief Define functions for detection and initialization for OpenCL devices.
38 * \author Anca Hamuraru <anca@streamcomputing.eu>
39 * \author Dimitrios Karkoulis <dimitris.karkoulis@gmail.com>
40 * \author Teemu Virolainen <teemu@streamcomputing.eu>
50 # include <sys/sysctl.h>
55 #include "gromacs/gpu_utils/gpu_utils.h"
56 #include "gromacs/gpu_utils/ocl_compiler.h"
57 #include "gromacs/gpu_utils/oclutils.h"
58 #include "gromacs/hardware/hw_info.h"
59 #include "gromacs/mdtypes/md_enums.h"
60 #include "gromacs/utility/cstringutil.h"
61 #include "gromacs/utility/fatalerror.h"
62 #include "gromacs/utility/smalloc.h"
64 /*! \brief Helper macro for error handling */
65 #define CALLOCLFUNC_LOGERROR(func, err_str, retval) { \
66 cl_int opencl_ret = func; \
67 if (CL_SUCCESS != opencl_ret) \
69 sprintf(err_str, "OpenCL error %d", opencl_ret); \
77 /*! \brief Helper function that checks whether a given GPU status indicates compatible GPU.
79 * \param[in] stat GPU status.
80 * \returns true if the provided status is egpuCompatible, otherwise false.
82 static bool is_compatible_gpu(int stat
)
84 return (stat
== egpuCompatible
);
87 /*! \brief Return true if executing on compatible OS for AMD OpenCL.
89 * This is assumed to be true for OS X version of at least 10.10.4 and
90 * all other OS flavors.
92 * Uses the BSD sysctl() interfaces to extract the kernel version.
94 * \return true if version is 14.4 or later (= OS X version 10.10.4),
95 * or OS is not Darwin.
98 runningOnCompatibleOSForAmd()
102 char kernelVersion
[256];
103 size_t len
= sizeof(kernelVersion
);
106 mib
[1] = KERN_OSRELEASE
;
108 sysctl(mib
, sizeof(mib
)/sizeof(mib
[0]), kernelVersion
, &len
, NULL
, 0);
110 int major
= strtod(kernelVersion
, NULL
);
111 int minor
= strtod(strchr(kernelVersion
, '.')+1, NULL
);
113 // Kernel 14.4 corresponds to OS X 10.10.4
114 return (major
> 14 || (major
== 14 && minor
>= 4));
120 /*! \brief Returns true if the gpu characterized by the device properties is
121 * supported by the native gpu acceleration.
122 * \returns true if the GPU properties passed indicate a compatible
123 * GPU, otherwise false.
125 static int is_gmx_supported_gpu_id(struct gmx_device_info_t
*ocl_gpu_device
)
127 /* Only AMD and NVIDIA GPUs are supported for now */
128 switch (ocl_gpu_device
->vendor_e
)
130 case OCL_VENDOR_NVIDIA
:
131 return egpuCompatible
;
133 return runningOnCompatibleOSForAmd() ? egpuCompatible
: egpuIncompatible
;
135 return egpuIncompatible
;
140 /*! \brief Returns an ocl_vendor_id_t value corresponding to the input OpenCL vendor name.
142 * \param[in] vendor_name String with OpenCL vendor name.
143 * \returns ocl_vendor_id_t value for the input vendor_name
145 static ocl_vendor_id_t
get_vendor_id(char *vendor_name
)
149 if (strstr(vendor_name
, "NVIDIA"))
151 return OCL_VENDOR_NVIDIA
;
154 if (strstr(vendor_name
, "AMD") ||
155 strstr(vendor_name
, "Advanced Micro Devices"))
157 return OCL_VENDOR_AMD
;
160 if (strstr(vendor_name
, "Intel"))
162 return OCL_VENDOR_INTEL
;
165 return OCL_VENDOR_UNKNOWN
;
169 //! This function is documented in the header file
170 int detect_gpus(gmx_gpu_info_t
*gpu_info
, char *err_str
)
173 cl_uint ocl_platform_count
;
174 cl_platform_id
*ocl_platform_ids
;
175 cl_device_type req_dev_type
= CL_DEVICE_TYPE_GPU
;
178 ocl_platform_ids
= NULL
;
180 if (getenv("GMX_OCL_FORCE_CPU") != NULL
)
182 req_dev_type
= CL_DEVICE_TYPE_CPU
;
187 CALLOCLFUNC_LOGERROR(clGetPlatformIDs(0, NULL
, &ocl_platform_count
), err_str
, retval
)
193 if (1 > ocl_platform_count
)
198 snew(ocl_platform_ids
, ocl_platform_count
);
200 CALLOCLFUNC_LOGERROR(clGetPlatformIDs(ocl_platform_count
, ocl_platform_ids
, NULL
), err_str
, retval
)
206 for (unsigned int i
= 0; i
< ocl_platform_count
; i
++)
208 cl_uint ocl_device_count
;
210 /* If requesting req_dev_type devices fails, just go to the next platform */
211 if (CL_SUCCESS
!= clGetDeviceIDs(ocl_platform_ids
[i
], req_dev_type
, 0, NULL
, &ocl_device_count
))
216 if (1 <= ocl_device_count
)
218 gpu_info
->n_dev
+= ocl_device_count
;
222 if (1 > gpu_info
->n_dev
)
227 snew(gpu_info
->gpu_dev
, gpu_info
->n_dev
);
231 cl_device_id
*ocl_device_ids
;
233 snew(ocl_device_ids
, gpu_info
->n_dev
);
236 for (unsigned int i
= 0; i
< ocl_platform_count
; i
++)
238 cl_uint ocl_device_count
;
240 /* If requesting req_dev_type devices fails, just go to the next platform */
241 if (CL_SUCCESS
!= clGetDeviceIDs(ocl_platform_ids
[i
], req_dev_type
, gpu_info
->n_dev
, ocl_device_ids
, &ocl_device_count
))
246 if (1 > ocl_device_count
)
251 for (unsigned int j
= 0; j
< ocl_device_count
; j
++)
253 gpu_info
->gpu_dev
[device_index
].ocl_gpu_id
.ocl_platform_id
= ocl_platform_ids
[i
];
254 gpu_info
->gpu_dev
[device_index
].ocl_gpu_id
.ocl_device_id
= ocl_device_ids
[j
];
256 gpu_info
->gpu_dev
[device_index
].device_name
[0] = 0;
257 clGetDeviceInfo(ocl_device_ids
[j
], CL_DEVICE_NAME
, sizeof(gpu_info
->gpu_dev
[device_index
].device_name
), gpu_info
->gpu_dev
[device_index
].device_name
, NULL
);
259 gpu_info
->gpu_dev
[device_index
].device_version
[0] = 0;
260 clGetDeviceInfo(ocl_device_ids
[j
], CL_DEVICE_VERSION
, sizeof(gpu_info
->gpu_dev
[device_index
].device_version
), gpu_info
->gpu_dev
[device_index
].device_version
, NULL
);
262 gpu_info
->gpu_dev
[device_index
].device_vendor
[0] = 0;
263 clGetDeviceInfo(ocl_device_ids
[j
], CL_DEVICE_VENDOR
, sizeof(gpu_info
->gpu_dev
[device_index
].device_vendor
), gpu_info
->gpu_dev
[device_index
].device_vendor
, NULL
);
265 gpu_info
->gpu_dev
[device_index
].compute_units
= 0;
266 clGetDeviceInfo(ocl_device_ids
[j
], CL_DEVICE_MAX_COMPUTE_UNITS
, sizeof(gpu_info
->gpu_dev
[device_index
].compute_units
), &(gpu_info
->gpu_dev
[device_index
].compute_units
), NULL
);
268 gpu_info
->gpu_dev
[device_index
].adress_bits
= 0;
269 clGetDeviceInfo(ocl_device_ids
[j
], CL_DEVICE_ADDRESS_BITS
, sizeof(gpu_info
->gpu_dev
[device_index
].adress_bits
), &(gpu_info
->gpu_dev
[device_index
].adress_bits
), NULL
);
271 gpu_info
->gpu_dev
[device_index
].vendor_e
= get_vendor_id(gpu_info
->gpu_dev
[device_index
].device_vendor
);
273 gpu_info
->gpu_dev
[device_index
].stat
= is_gmx_supported_gpu_id(gpu_info
->gpu_dev
+ device_index
);
275 if (egpuCompatible
== gpu_info
->gpu_dev
[device_index
].stat
)
277 gpu_info
->n_dev_compatible
++;
284 gpu_info
->n_dev
= device_index
;
286 /* Dummy sort of devices - AMD first, then NVIDIA, then Intel */
287 // TODO: Sort devices based on performance.
288 if (0 < gpu_info
->n_dev
)
291 for (int i
= 0; i
< gpu_info
->n_dev
; i
++)
293 if (OCL_VENDOR_AMD
== gpu_info
->gpu_dev
[i
].vendor_e
)
299 gmx_device_info_t ocl_gpu_info
;
300 ocl_gpu_info
= gpu_info
->gpu_dev
[i
];
301 gpu_info
->gpu_dev
[i
] = gpu_info
->gpu_dev
[last
];
302 gpu_info
->gpu_dev
[last
] = ocl_gpu_info
;
307 /* if more than 1 device left to be sorted */
308 if ((gpu_info
->n_dev
- 1 - last
) > 1)
310 for (int i
= 0; i
< gpu_info
->n_dev
; i
++)
312 if (OCL_VENDOR_NVIDIA
== gpu_info
->gpu_dev
[i
].vendor_e
)
318 gmx_device_info_t ocl_gpu_info
;
319 ocl_gpu_info
= gpu_info
->gpu_dev
[i
];
320 gpu_info
->gpu_dev
[i
] = gpu_info
->gpu_dev
[last
];
321 gpu_info
->gpu_dev
[last
] = ocl_gpu_info
;
328 sfree(ocl_device_ids
);
334 sfree(ocl_platform_ids
);
339 //! This function is documented in the header file
340 void free_gpu_info(const gmx_gpu_info_t gmx_unused
*gpu_info
)
342 if (gpu_info
== NULL
)
347 sfree(gpu_info
->gpu_dev
);
350 //! This function is documented in the header file
351 void pick_compatible_gpus(const gmx_gpu_info_t
*gpu_info
,
352 gmx_gpu_opt_t
*gpu_opt
)
358 /* gpu_dev/n_dev have to be either NULL/0 or not (NULL/0) */
359 assert((gpu_info
->n_dev
!= 0 ? 0 : 1) ^ (gpu_info
->gpu_dev
== NULL
? 0 : 1));
361 snew(compat
, gpu_info
->n_dev
);
363 for (i
= 0; i
< gpu_info
->n_dev
; i
++)
365 if (is_compatible_gpu(gpu_info
->gpu_dev
[i
].stat
))
368 compat
[ncompat
- 1] = i
;
372 gpu_opt
->n_dev_compatible
= ncompat
;
373 snew(gpu_opt
->dev_compatible
, ncompat
);
374 memcpy(gpu_opt
->dev_compatible
, compat
, ncompat
*sizeof(*compat
));
378 //! This function is documented in the header file
379 gmx_bool
check_selected_gpus(int *checkres
,
380 const gmx_gpu_info_t
*gpu_info
,
381 gmx_gpu_opt_t
*gpu_opt
)
388 assert(gpu_opt
->n_dev_use
>= 0);
390 if (gpu_opt
->n_dev_use
== 0)
395 assert(gpu_opt
->dev_use
);
397 /* we will assume that all GPUs requested are valid IDs,
398 otherwise we'll bail anyways */
401 for (i
= 0; i
< gpu_opt
->n_dev_use
; i
++)
403 id
= gpu_opt
->dev_use
[i
];
405 /* devices are stored in increasing order of IDs in gpu_dev */
406 gpu_opt
->dev_use
[i
] = id
;
408 checkres
[i
] = (id
>= gpu_info
->n_dev
) ?
409 egpuNonexistent
: gpu_info
->gpu_dev
[id
].stat
;
411 bAllOk
= bAllOk
&& is_compatible_gpu(checkres
[i
]);
417 //! This function is documented in the header file
418 void get_gpu_device_info_string(char gmx_unused
*s
, const gmx_gpu_info_t gmx_unused
*gpu_info
, int gmx_unused index
)
423 if (index
< 0 && index
>= gpu_info
->n_dev
)
428 gmx_device_info_t
*dinfo
= &gpu_info
->gpu_dev
[index
];
431 dinfo
->stat
== egpuCompatible
||
432 dinfo
->stat
== egpuIncompatible
;
436 sprintf(s
, "#%d: %s, stat: %s",
438 gpu_detect_res_str
[dinfo
->stat
]);
442 sprintf(s
, "#%d: name: %s, vendor: %s, device version: %s, stat: %s",
443 index
, dinfo
->device_name
, dinfo
->device_vendor
,
444 dinfo
->device_version
,
445 gpu_detect_res_str
[dinfo
->stat
]);
449 //! This function is documented in the header file
450 gmx_bool
init_gpu(const gmx::MDLogger
& /*mdlog*/,
453 const gmx_gpu_info_t gmx_unused
*gpu_info
,
454 const gmx_gpu_opt_t
*gpu_opt
461 if (mygpu
< 0 || mygpu
>= gpu_opt
->n_dev_use
)
464 sprintf(sbuf
, "Trying to initialize an non-existent GPU: "
465 "there are %d %s-selected GPU(s), but #%d was requested.",
466 gpu_opt
->n_dev_use
, gpu_opt
->bUserSet
? "user" : "auto", mygpu
);
470 // If the device is NVIDIA, for safety reasons we disable the JIT
471 // caching as this is known to be broken at least until driver 364.19;
472 // the cache does not always get regenerated when the source code changes,
473 // e.g. if the path to the kernel sources remains the same
475 if (gpu_info
->gpu_dev
[mygpu
].vendor_e
== OCL_VENDOR_NVIDIA
)
477 // Ignore return values, failing to set the variable does not mean
478 // that something will go wrong later.
480 _putenv("CUDA_CACHE_DISABLE=1");
482 // Don't override, maybe a dev is testing.
483 setenv("CUDA_CACHE_DISABLE", "1", 0);
490 //! This function is documented in the header file
491 int get_gpu_device_id(const gmx_gpu_info_t
*,
492 const gmx_gpu_opt_t
*gpu_opt
,
496 assert(idx
>= 0 && idx
< gpu_opt
->n_dev_use
);
498 return gpu_opt
->dev_use
[idx
];
501 //! This function is documented in the header file
502 char* get_ocl_gpu_device_name(const gmx_gpu_info_t
*gpu_info
,
503 const gmx_gpu_opt_t
*gpu_opt
,
508 assert(idx
>= 0 && idx
< gpu_opt
->n_dev_use
);
510 return gpu_info
->gpu_dev
[gpu_opt
->dev_use
[idx
]].device_name
;
513 //! This function is documented in the header file
514 size_t sizeof_gpu_dev_info(void)
516 return sizeof(gmx_device_info_t
);
519 /*! \brief Prints the name of a kernel function pointer.
521 * \param[in] kernel OpenCL kernel
522 * \returns CL_SUCCESS if the operation was successful, an OpenCL error otherwise.
524 cl_int
dbg_ocl_kernel_name(const cl_kernel kernel
)
527 char kernel_name
[256];
528 cl_error
= clGetKernelInfo(kernel
, CL_KERNEL_FUNCTION_NAME
,
529 sizeof(kernel_name
), &kernel_name
, NULL
);
532 printf("No kernel found!\n");
536 printf("%s\n", kernel_name
);
541 /*! \brief Prints the name of a kernel function pointer.
543 * \param[in] kernel OpenCL kernel
544 * \returns CL_SUCCESS if the operation was successful, an OpenCL error otherwise.
546 cl_int
dbg_ocl_kernel_name_address(void* kernel
)
549 char kernel_name
[256];
550 cl_error
= clGetKernelInfo((cl_kernel
)kernel
, CL_KERNEL_FUNCTION_NAME
,
551 sizeof(kernel_name
), &kernel_name
, NULL
);
554 printf("No kernel found!\n");
558 printf("%s\n", kernel_name
);
563 void gpu_set_host_malloc_and_free(bool bUseGpuKernels
,
564 gmx_host_alloc_t
**nb_alloc
,
565 gmx_host_free_t
**nb_free
)
569 *nb_alloc
= &ocl_pmalloc
;
570 *nb_free
= &ocl_pfree
;