cruzbit 1.2.0

A simple decentralized peer-to-peer ledger implementation
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263

// this is partially re-worked from https://github.com/tcatm/oclminer/
// primary changes to this file were renaming and addition of additional
// parameters. -asdvxgxasjab 7/30/19
#include "ocl.h"
#include "sha3.h"
#include <stdint.h>

// include cruzbit opencl kernel
#include "cruzbit.h"

int num_devices_cl() {
  cl_int status = 0;

  cl_uint num_platforms;
  cl_platform_id platform = NULL;
  status = clGetPlatformIDs(0, NULL, &num_platforms);
  if (status != CL_SUCCESS) {
    printf("Error: Getting Platforms. (clGetPlatformsIDs)\n");
    return -1;
  }

  if (num_platforms > 0) {
    cl_platform_id *platforms =
        (cl_platform_id *)malloc(num_platforms * sizeof(cl_platform_id));
    status = clGetPlatformIDs(num_platforms, platforms, NULL);
    if (status != CL_SUCCESS) {
      printf("Error: Getting Platform Ids. (clGetPlatformsIDs)\n");
      return -1;
    }

    unsigned int i;
    for (i = 0; i < num_platforms; ++i) {
      char pbuff[100];
      status = clGetPlatformInfo(platforms[i], CL_PLATFORM_VENDOR,
                                 sizeof(pbuff), pbuff, NULL);
      if (status != CL_SUCCESS) {
        printf("Error: Getting Platform Info. (clGetPlatformInfo)\n");
        free(platforms);
        return -1;
      }
      platform = platforms[i];
      if (!strcmp(pbuff, "Advanced Micro Devices, Inc.")) {
        break;
      }
    }
    free(platforms);
  }

  if (platform == NULL) {
    perror("NULL platform found!\n");
    return -1;
  }

  cl_uint num_devices;
  status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 0, NULL, &num_devices);
  if (status != CL_SUCCESS) {
    printf("Error: Getting Device IDs (num)\n");
    return -1;
  }

  return num_devices;
}

static char *read_file(const char *filename, int *length) {
  FILE *f = fopen(filename, "r");
  void *buffer;

  if (!f) {
    fprintf(stderr, "Unable to open %s for reading\n", filename);
    return NULL;
  }

  fseek(f, 0, SEEK_END);
  *length = ftell(f);
  fseek(f, 0, SEEK_SET);

  buffer = (char *)malloc(*length + 1);
  *length = fread(buffer, 1, *length, f);
  fclose(f);
  ((char *)buffer)[*length] = '\0';

  return (char *)buffer;
}

cl_state *init_cl(int gpu, char *name, size_t name_len) {
  cl_int status = 0;
  cl_state *device_state = new cl_state;

  cl_uint num_platforms;
  cl_platform_id platform = NULL;
  status = clGetPlatformIDs(0, NULL, &num_platforms);
  if (status != CL_SUCCESS) {
    printf("Error: Getting Platforms. (clGetPlatformsIDs)\n");
    return NULL;
  }

  if (num_platforms > 0) {
    cl_platform_id *platforms =
        (cl_platform_id *)malloc(num_platforms * sizeof(cl_platform_id));
    status = clGetPlatformIDs(num_platforms, platforms, NULL);
    if (status != CL_SUCCESS) {
      printf("Error: Getting Platform Ids. (clGetPlatformsIDs)\n");
      return NULL;
    }

    unsigned int i;
    for (i = 0; i < num_platforms; ++i) {
      char pbuff[100];
      status = clGetPlatformInfo(platforms[i], CL_PLATFORM_VENDOR,
                                 sizeof(pbuff), pbuff, NULL);
      if (status != CL_SUCCESS) {
        printf("Error: Getting Platform Info. (clGetPlatformInfo)\n");
        free(platforms);
        return NULL;
      }
      platform = platforms[i];
      if (!strcmp(pbuff, "Advanced Micro Devices, Inc.")) {
        break;
      }
    }
    free(platforms);
  }

  if (platform == NULL) {
    perror("NULL platform found!\n");
    return NULL;
  }

  cl_uint num_devices;
  status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 0, NULL, &num_devices);
  if (status != CL_SUCCESS) {
    printf("Error: Getting Device IDs (num)\n");
    return NULL;
  }

  cl_device_id *devices;
  if (num_devices > 0) {
    devices = (cl_device_id *)malloc(num_devices * sizeof(cl_device_id));

    /* Now, get the device list data */

    status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, num_devices, devices,
                            NULL);
    if (status != CL_SUCCESS) {
      printf("Error: Getting Device IDs (list)\n");
      return NULL;
    }

    printf("OpenCL devices:\n");

    int i;
    for (i = 0; i < num_devices; i++) {
      char pbuff[100];
      status = clGetDeviceInfo(devices[i], CL_DEVICE_NAME, sizeof(pbuff), pbuff,
                               NULL);
      if (status != CL_SUCCESS) {
        printf("Error: Getting Device Info\n");
        return NULL;
      }

      printf("%i: %s\n", i, pbuff);
    }

    if (gpu >= 0 && gpu < num_devices) {
      char pbuff[100];
      status = clGetDeviceInfo(devices[gpu], CL_DEVICE_NAME, sizeof(pbuff),
                               pbuff, NULL);
      if (status != CL_SUCCESS) {
        printf("Error: Getting Device Info\n");
        return NULL;
      }

      printf("Selected %i: %s\n", gpu, pbuff);
      strncpy(name, pbuff, name_len);
    } else {
      printf("Invalid GPU %i\n", gpu);
      return NULL;
    }

  } else
    return NULL;

  cl_context_properties cps[3] = {CL_CONTEXT_PLATFORM,
                                  (cl_context_properties)platform, 0};

  device_state->context =
      clCreateContextFromType(cps, CL_DEVICE_TYPE_GPU, NULL, NULL, &status);
  if (status != CL_SUCCESS) {
    printf("Error: Creating Context. (clCreateContextFromType)\n");
    return NULL;
  }

  /////////////////////////////////////////////////////////////////
  // Load CL file, build CL program object, create CL kernel object
  /////////////////////////////////////////////////////////////////
  //
  const char *sources[] = { opencl_cruzbit };

  device_state->program = clCreateProgramWithSource(
      device_state->context, 1, sources, &opencl_cruzbit_size, &status);
  if (status != CL_SUCCESS) {
    printf(
        "Error: Loading Binary into cl_program (clCreateProgramWithBinary)\n");
    return NULL;
  }

  /* create a cl program executable for all the devices specified */
  status =
      clBuildProgram(device_state->program, 1, &devices[gpu], "", NULL, NULL);
  if (status != CL_SUCCESS) {
    printf("Error: Building Program (clBuildProgram)\n");
    size_t logSize;
    status = clGetProgramBuildInfo(device_state->program, devices[gpu],
                                   CL_PROGRAM_BUILD_LOG, 0, NULL, &logSize);

    char *log = (char *)malloc(logSize);
    status = clGetProgramBuildInfo(device_state->program, devices[gpu],
                                   CL_PROGRAM_BUILD_LOG, logSize, log, NULL);
    printf("%s\n", log);
    return NULL;
  }

  /* get a kernel object handle for a kernel with the given name */
  device_state->kernel =
      clCreateKernel(device_state->program, "cruzbit", &status);
  if (status != CL_SUCCESS) {
    printf("Error: Creating Kernel from program. (clCreateKernel)\n");
    return NULL;
  }

  /////////////////////////////////////////////////////////////////
  // Create an OpenCL command queue
  /////////////////////////////////////////////////////////////////
  device_state->command_queue =
      clCreateCommandQueue(device_state->context, devices[gpu], 0, &status);
  if (status != CL_SUCCESS) {
    printf("Creating Command Queue. (clCreateCommandQueue)\n");
    return NULL;
  }

  device_state->arg0 = clCreateBuffer(device_state->context, CL_MEM_READ_WRITE,
                                      sizeof(miner_state), NULL, &status);
  if (status != CL_SUCCESS) {
    printf("Error: clCreateBuffer (inputBuffer)\n");
    return NULL;
  }

  device_state->arg1 = clCreateBuffer(device_state->context, CL_MEM_READ_WRITE,
                                      sizeof(int64_t), NULL, &status);
  if (status != CL_SUCCESS) {
    printf("Error: clCreateBuffer (foundNonce)\n");
    return NULL;
  }

  device_state->arg2 = clCreateBuffer(device_state->context, CL_MEM_READ_WRITE,
                                      sizeof(uint8_t), NULL, &status);
  if (status != CL_SUCCESS) {
    printf("Error: clCreateBuffer (foundNonce)\n");
    return NULL;
  }

  return device_state;
}