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main.c
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// Gateless Gate, a Zcash miner
// Copyright 2016 zawawa @ bitcointalk.org
//
// The initial version of this software was based on:
// SILENTARMY v5
// The MIT License (MIT) Copyright (c) 2016 Marc Bevand, Genoil
//
// This program is free software : you can redistribute it and / or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.If not, see <http://www.gnu.org/licenses/>.
#ifdef WIN32
#pragma comment(lib, "winmm.lib")
#define _CRT_RAND_S
#endif
#define _GNU_SOURCE 1/* memrchr */
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <stdint.h>
#include <inttypes.h>
#include <assert.h>
#include <sys/types.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <errno.h>
#include <CL/cl.h>
#include "blake.h"
#include "sha256.h"
#ifdef WIN32
#undef _UNICODE // @mrb quick patch to make win getopt work
#include <Winsock2.h>
#include <io.h>
#include <BaseTsd.h>
#include "windows/gettimeofday.h"
#include "windows/getopt.h"
#include "windows/memrchr.h"
typedef SSIZE_T ssize_t;
#define open _open
#define read _read
#define write _write
#define close _close
#define snprintf _snprintf
#else
#include <sys/time.h>
#include <unistd.h>
#include <getopt.h>
#include "_kernel.h"
#ifndef O_BINARY
#define O_BINARY 0
#endif
#endif
typedef uint8_t uchar;
typedef uint32_t uint;
#ifdef NVIDIA
#include "param-nvidia.h"
#else
#include "param.h"
#endif
#define MIN(A, B) (((A) < (B)) ? (A) : (B))
#define MAX(A, B) (((A) > (B)) ? (A) : (B))
int verbose = 0;
uint32_t show_encoded = 0;
uint64_t nr_nonces = 1;
uint32_t do_list_devices = 0;
uint32_t gpu_to_use = 0;
uint32_t mining = 0;
struct timeval kern_avg_run_time;
int amd_flag = 0;
const char *source = NULL;
size_t source_len;
const char *binary = NULL;
size_t binary_len;
typedef struct debug_s
{
uint32_t dropped_coll;
uint32_t dropped_stor;
} debug_t;
void debug(const char *fmt, ...)
{
va_list ap;
if (!verbose)
return;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
}
void warn(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
}
void fatal(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
exit(1);
}
uint64_t parse_num(char *str)
{
char *endptr;
uint64_t n;
n = strtoul(str, &endptr, 0);
if (endptr == str || *endptr)
fatal("'%s' is not a valid number\n", str);
return n;
}
uint64_t now(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return (uint64_t)tv.tv_sec * 1000 * 1000 + tv.tv_usec;
}
void show_time(uint64_t t0)
{
uint64_t t1;
t1 = now();
fprintf(stderr, "Elapsed time: %.1f msec\n", (t1 - t0) / 1e3);
}
#ifndef WIN32
void set_blocking_mode(int fd, int block)
{
int f;
if (-1 == (f = fcntl(fd, F_GETFL)))
fatal("fcntl F_GETFL: %s\n", strerror(errno));
if (-1 == fcntl(fd, F_SETFL, block ? (f & ~O_NONBLOCK) : (f | O_NONBLOCK)))
fatal("fcntl F_SETFL: %s\n", strerror(errno));
}
#endif
void randomize(void *p, ssize_t l)
{
#ifndef WIN32
const char *fname = "/dev/urandom";
int fd;
ssize_t ret;
if (-1 == (fd = open(fname, O_RDONLY)))
fatal("open %s: %s\n", fname, strerror(errno));
if (-1 == (ret = read(fd, p, l)))
fatal("read %s: %s\n", fname, strerror(errno));
if (ret != l)
fatal("%s: short read %d bytes out of %d\n", fname, ret, l);
if (-1 == close(fd))
fatal("close %s: %s\n", fname, strerror(errno));
#else
for (int i = 0; i < l; i++) {
unsigned int ui;
rand_s(&ui);
((uint8_t *)p)[i] = ui & 0xff;
}
#endif
}
struct timeval time_diff(struct timeval start, struct timeval end)
{
struct timeval temp;
if ((end.tv_usec - start.tv_usec)<0) {
temp.tv_sec = end.tv_sec - start.tv_sec - 1;
temp.tv_usec = 1000000 + end.tv_usec - start.tv_usec;
}
else {
temp.tv_sec = end.tv_sec - start.tv_sec;
temp.tv_usec = end.tv_usec - start.tv_usec;
}
return temp;
}
cl_mem check_clCreateBuffer(cl_context ctx, cl_mem_flags flags, size_t size,
void *host_ptr)
{
cl_int status;
cl_mem ret;
ret = clCreateBuffer(ctx, flags, size, host_ptr, &status);
if (status != CL_SUCCESS || !ret)
fatal("clCreateBuffer (%d)\n", status);
return ret;
}
void check_clSetKernelArg(cl_kernel k, cl_uint a_pos, cl_mem *a)
{
cl_int status;
status = clSetKernelArg(k, a_pos, sizeof(*a), a);
if (status != CL_SUCCESS)
fatal("clSetKernelArg (%d)\n", status);
}
void check_clEnqueueNDRangeKernel(cl_command_queue queue, cl_kernel k, cl_uint
work_dim, const size_t *global_work_offset, const size_t
*global_work_size, const size_t *local_work_size, cl_uint
num_events_in_wait_list, const cl_event *event_wait_list, cl_event
*event)
{
cl_uint status;
status = clEnqueueNDRangeKernel(queue, k, work_dim, global_work_offset,
global_work_size, local_work_size, num_events_in_wait_list,
event_wait_list, event);
if (status != CL_SUCCESS)
fatal("clEnqueueNDRangeKernel (%d)\n", status);
}
void check_clEnqueueReadBuffer(cl_command_queue queue, cl_mem buffer, cl_bool
blocking_read, size_t offset, size_t size, void *ptr, cl_uint
num_events_in_wait_list, const cl_event *event_wait_list, cl_event
*event)
{
cl_int status;
status = clEnqueueReadBuffer(queue, buffer, blocking_read, offset,
size, ptr, num_events_in_wait_list, event_wait_list, event);
if (status != CL_SUCCESS)
fatal("clEnqueueReadBuffer (%d)\n", status);
}
void hexdump(uint8_t *a, uint32_t a_len)
{
for (uint32_t i = 0; i < a_len; i++)
fprintf(stderr, "%02x", a[i]);
}
char *s_hexdump(const void *_a, uint32_t a_len)
{
const uint8_t *a = _a;
static char buf[4096];
uint32_t i;
for (i = 0; i < a_len && i + 2 < sizeof(buf); i++)
sprintf(buf + i * 2, "%02x", a[i]);
buf[i * 2] = 0;
return buf;
}
uint8_t hex2val(const char *base, size_t off)
{
const char c = base[off];
if (c >= '0' && c <= '9') return c - '0';
else if (c >= 'a' && c <= 'f') return 10 + c - 'a';
else if (c >= 'A' && c <= 'F') return 10 + c - 'A';
fatal("Invalid hex char at offset %d: ...%d...\n", off, c);
return 0;
}
unsigned nr_compute_units(const char *gpu)
{
if (!strcmp(gpu, "rx480")) return 36;
fprintf(stderr, "Unknown GPU: %s\n", gpu);
return 0;
}
void load_file(const char *fname, char **dat, size_t *dat_len, int ignore_error)
{
struct stat st;
int fd;
ssize_t ret;
if (-1 == (fd = open(fname, O_RDONLY | O_BINARY))) {
if (ignore_error)
return;
fatal("%s: %s\n", fname, strerror(errno));
}
if (fstat(fd, &st))
fatal("fstat: %s: %s\n", fname, strerror(errno));
*dat_len = st.st_size;
if (!(*dat = (char *)malloc(*dat_len + 1)))
fatal("malloc: %s\n", strerror(errno));
ret = read(fd, *dat, *dat_len);
if (ret < 0)
fatal("read: %s: %s\n", fname, strerror(errno));
if ((size_t)ret != *dat_len)
fatal("%s: partial read\n", fname);
if (close(fd))
fatal("close: %s: %s\n", fname, strerror(errno));
(*dat)[*dat_len] = 0;
}
void get_program_build_log(cl_program program, cl_device_id device)
{
cl_int status;
char val[2 * 1024 * 1024];
size_t ret = 0;
status = clGetProgramBuildInfo(program, device,
CL_PROGRAM_BUILD_LOG,
sizeof(val), // size_t param_value_size
&val, // void *param_value
&ret); // size_t *param_value_size_ret
if (status != CL_SUCCESS)
fatal("clGetProgramBuildInfo (%d)\n", status);
fprintf(stderr, "%s\n", val);
}
void dump(const char *fname, void *data, size_t len)
{
int fd;
ssize_t ret;
if (-1 == (fd = open(fname, O_BINARY | O_WRONLY | O_CREAT | O_TRUNC, 0666)))
fatal("%s: %s\n", fname, strerror(errno));
ret = write(fd, data, len);
if (ret == -1)
fatal("write: %s: %s\n", fname, strerror(errno));
if ((size_t)ret != len)
fatal("%s: partial write\n", fname);
if (-1 == close(fd))
fatal("close: %s: %s\n", fname, strerror(errno));
}
void get_program_bins(cl_program program)
{
cl_int status;
size_t sizes;
unsigned char *p;
size_t ret = 0;
status = clGetProgramInfo(program, CL_PROGRAM_BINARY_SIZES,
sizeof(sizes), // size_t param_value_size
&sizes, // void *param_value
&ret); // size_t *param_value_size_ret
if (status != CL_SUCCESS)
fatal("clGetProgramInfo(sizes) (%d)\n", status);
if (ret != sizeof(sizes))
fatal("clGetProgramInfo(sizes) did not fill sizes (%d)\n", status);
debug("Program binary size is %zd bytes\n", sizes);
p = (unsigned char *)malloc(sizes);
status = clGetProgramInfo(program, CL_PROGRAM_BINARIES,
sizeof(p), // size_t param_value_size
&p, // void *param_value
&ret); // size_t *param_value_size_ret
if (status != CL_SUCCESS)
fatal("clGetProgramInfo (%d)\n", status);
dump("dump.co", p, sizes);
debug("program: %02x%02x%02x%02x...\n", p[0], p[1], p[2], p[3]);
}
void print_platform_info(cl_platform_id plat)
{
char name[1024];
size_t len = 0;
int status;
status = clGetPlatformInfo(plat, CL_PLATFORM_NAME, sizeof(name), &name,
&len);
if (status != CL_SUCCESS)
fatal("clGetPlatformInfo (%d)\n", status);
printf("Devices on platform \"%s\":\n", name);
fflush(stdout);
}
int is_platform_amd(cl_platform_id plat)
{
char name[1024];
size_t len = 0;
int status;
status = clGetPlatformInfo(plat, CL_PLATFORM_NAME, sizeof(name), &name,
&len);
if (status != CL_SUCCESS)
fatal("clGetPlatformInfo (%d)\n", status);
return strncmp(name, "AMD Accelerated Parallel Processing", len) == 0;
}
void print_device_info(unsigned i, cl_device_id d)
{
char name[1024];
size_t len = 0;
int status;
status = clGetDeviceInfo(d, CL_DEVICE_NAME, sizeof(name), &name, &len);
if (status != CL_SUCCESS)
fatal("clGetDeviceInfo (%d)\n", status);
printf(" ID %d: %s\n", i, name);
fflush(stdout);
}
#ifdef ENABLE_DEBUG
uint32_t has_i(uint32_t round, uint8_t *ht, uint32_t row, uint32_t i,
uint32_t mask, uint32_t *res)
{
uint32_t slot;
uint8_t *p = (uint8_t *)(ht + row * NR_SLOTS * SLOT_LEN);
uint32_t cnt = *(uint32_t *)p;
cnt = MIN(cnt, NR_SLOTS);
for (slot = 0; slot < cnt; slot++, p += SLOT_LEN)
{
if ((*(uint32_t *)(p + xi_offset_for_round(round) - 4) & mask) ==
(i & mask))
{
if (res)
*res = slot;
return 1;
}
}
return 0;
}
uint32_t has_xi(uint32_t round, uint8_t *ht, uint32_t row, uint32_t xi,
uint32_t *res)
{
uint32_t slot;
uint8_t *p = (uint8_t *)(ht + row * NR_SLOTS * SLOT_LEN);
uint32_t cnt = *(uint32_t *)p;
cnt = MIN(cnt, NR_SLOTS);
for (slot = 0; slot < cnt; slot++, p += SLOT_LEN)
{
if ((*(uint32_t *)(p + xi_offset_for_round(round))) == (xi))
{
if (res)
*res = slot;
return 1;
}
}
return 0;
}
void examine_ht(unsigned round, cl_command_queue queue, cl_mem *hash_table_buffers, cl_mem row_counters_buffer)
{
uint32_t *hash_tables[PARAM_K];
uint32_t *row_counters;
if (verbose < 3)
return;
if (NR_ROWS_LOG >= 15) {
for (uint i = 0; i < PARAM_K; ++i) {
hash_tables[i] = (uint8_t *)malloc(HT_SIZE);
if (!hash_tables[i])
fatal("malloc: %s\n", strerror(errno));
check_clEnqueueReadBuffer(queue,
hash_table_buffers[i],
CL_TRUE, // cl_bool blocking_read
0, // size_t offset
HT_SIZE, // size_t size
hash_tables[i], // void *ptr
0, // cl_uint num_events_in_wait_list
NULL, // cl_event *event_wait_list
NULL); // cl_event *event
}
}
row_counters = (uint32_t *)malloc(RC_SIZE);
if (!row_counters)
fatal("malloc: %s\n", strerror(errno));
check_clEnqueueReadBuffer(queue,
row_counters_buffer,
CL_TRUE, // cl_bool blocking_read
0, // size_t offset
RC_SIZE, // size_t size
row_counters, // void *ptr
0, // cl_uint num_events_in_wait_list
NULL, // cl_event *event_wait_list
NULL); // cl_event *event
uint slot_count = 0;
uint overflow_count = 0;
uint empty_count = 0;
for (unsigned row = 0; row < NR_ROWS; row++) {
uint32_t rowIdx, rowOffset;
rowIdx = row / ROWS_PER_UINT;
rowOffset = BITS_PER_ROW * (row % ROWS_PER_UINT);
uint32_t cnt = (row_counters[rowIdx] >> rowOffset) & ROW_MASK;
cnt = min(cnt, (uint32_t)NR_SLOTS);
if (cnt >= NR_SLOTS)
++overflow_count;
if (cnt == 0)
++empty_count;
slot_count += cnt;
if (NR_ROWS_LOG >= 15) {
for (uint32_t slot_index = 0; slot_index < NR_SLOTS; ++slot_index) {
uint32_t *slot = hash_tables[round] + (row * NR_SLOTS + slot_index) * (ADJUSTED_SLOT_LEN(round) / 4);
uint32_t i = slot[0];
if (round) {
uint32_t prev_row = DECODE_ROW(i);
uint32_t prev_slot0_index = DECODE_SLOT0(i);
uint32_t prev_slot1_index = DECODE_SLOT1(i);
if (prev_row >= NR_ROWS || prev_slot0_index >= NR_SLOTS || prev_slot1_index >= NR_SLOTS) {
printf("Invalid reference (i: 0x%08x).\n", i);
}
else {
uint32_t *prev_slot0 = hash_tables[round - 1] + (prev_row * NR_SLOTS + prev_slot0_index) * (ADJUSTED_SLOT_LEN(round - 1) / 4);
uint32_t *prev_slot1 = hash_tables[round - 1] + (prev_row * NR_SLOTS + prev_slot1_index) * (ADJUSTED_SLOT_LEN(round - 1) / 4);
if (0 && (prev_slot0[1] & 0xff) != (prev_slot1[1] & 0xff))
printf("Invalid reference (row: %u, i: 0x%08x, slot0: 0x%08x 0x%08x, slot1: 0x%08x 0x%08x).\n",
(unsigned int)row,
(unsigned int)i,
prev_slot0[0],
prev_slot0[1],
prev_slot1[0],
prev_slot1[1]);
}
}
}
}
}
printf("%d slots were generated in %d rows (capacity: %d, average: %.1f, full: %.1f%%, empty: %.1f%%).\n",
(int)slot_count,
(int)NR_ROWS,
(int)NR_SLOTS,
(float)slot_count / NR_ROWS,
(float)overflow_count / NR_ROWS * 100,
(float)empty_count / NR_ROWS * 100);
if (NR_ROWS_LOG >= 15) {
for (uint i = 0; i < PARAM_K; ++i)
free(hash_tables[i]);
}
free(row_counters);
}
#else
void examine_ht(unsigned round, cl_command_queue queue, cl_mem *hash_table_buffers, cl_mem row_counters_buffer)
{
}
#endif
void examine_dbg(cl_command_queue queue, cl_mem buf_dbg, size_t dbg_size)
{
debug_t *dbg;
size_t dropped_coll_total, dropped_stor_total;
if (verbose < 2)
return;
dbg = (debug_t *)malloc(dbg_size);
if (!dbg)
fatal("malloc: %s\n", strerror(errno));
check_clEnqueueReadBuffer(queue, buf_dbg,
CL_TRUE, // cl_bool blocking_read
0, // size_t offset
dbg_size, // size_t size
dbg, // void *ptr
0, // cl_uint num_events_in_wait_list
NULL, // cl_event *event_wait_list
NULL); // cl_event *event
dropped_coll_total = dropped_stor_total = 0;
for (unsigned tid = 0; tid < dbg_size / sizeof(*dbg); tid++)
{
dropped_coll_total += dbg[tid].dropped_coll;
dropped_stor_total += dbg[tid].dropped_stor;
if (0 && (dbg[tid].dropped_coll || dbg[tid].dropped_stor))
debug("thread %6d: dropped_coll %zd dropped_stor %zd\n", tid,
dbg[tid].dropped_coll, dbg[tid].dropped_stor);
}
debug("Dropped: %zd (coll) %zd (stor)\n",
dropped_coll_total, dropped_stor_total);
free(dbg);
}
size_t select_work_size_blake(void)
{
size_t work_size =
64 * /* thread per wavefront */
BLAKE_WPS * /* wavefront per simd */
4 * /* simd per compute unit */
nr_compute_units("rx480");
// Make the work group size a multiple of the nr of wavefronts, while
// dividing the number of inputs. This results in the worksize being a
// power of 2.
while (NR_INPUTS % work_size)
work_size += 64;
//debug("Blake: work size %zd\n", work_size);
return work_size;
}
void init_ht(cl_command_queue queue, cl_kernel k_init_ht, cl_mem buf_ht,
cl_mem rowCounters)
{
size_t global_ws = RC_SIZE / sizeof(cl_uint);
size_t local_ws = 256;
cl_int status;
#if 0
uint32_t pat = -1;
status = clEnqueueFillBuffer(queue, buf_ht, &pat, sizeof(pat), 0,
NR_ROWS * NR_SLOTS * SLOT_LEN,
0, // cl_uint num_events_in_wait_list
NULL, // cl_event *event_wait_list
NULL); // cl_event *event
if (status != CL_SUCCESS)
fatal("clEnqueueFillBuffer (%d)\n", status);
#endif
status = clSetKernelArg(k_init_ht, 0, sizeof(buf_ht), &buf_ht);
clSetKernelArg(k_init_ht, 1, sizeof(rowCounters), &rowCounters);
if (status != CL_SUCCESS)
fatal("clSetKernelArg (%d)\n", status);
check_clEnqueueNDRangeKernel(queue, k_init_ht,
1, // cl_uint work_dim
NULL, // size_t *global_work_offset
&global_ws, // size_t *global_work_size
&local_ws, // size_t *local_work_size
0, // cl_uint num_events_in_wait_list
NULL, // cl_event *event_wait_list
NULL); // cl_event *event
}
/*
** Write ZCASH_SOL_LEN bytes representing the encoded solution as per the
** Zcash protocol specs (512 x 21-bit inputs).
**
** out ZCASH_SOL_LEN-byte buffer where the solution will be stored
** inputs array of 32-bit inputs
** n number of elements in array
*/
void store_encoded_sol(uint8_t *out, uint32_t *inputs, uint32_t n)
{
uint32_t byte_pos = 0;
int32_t bits_left = PREFIX + 1;
uint8_t x = 0;
uint8_t x_bits_used = 0;
while (byte_pos < n)
{
if (bits_left >= 8 - x_bits_used)
{
x |= inputs[byte_pos] >> (bits_left - 8 + x_bits_used);
bits_left -= 8 - x_bits_used;
x_bits_used = 8;
}
else if (bits_left > 0)
{
uint32_t mask = ~(-1 << (8 - x_bits_used));
mask = ((~mask) >> bits_left) & mask;
x |= (inputs[byte_pos] << (8 - x_bits_used - bits_left)) & mask;
x_bits_used += bits_left;
bits_left = 0;
}
else if (bits_left <= 0)
{
assert(!bits_left);
byte_pos++;
bits_left = PREFIX + 1;
}
if (x_bits_used == 8)
{
*out++ = x;
x = x_bits_used = 0;
}
}
}
/*
** Print on stdout a hex representation of the encoded solution as per the
** zcash protocol specs (512 x 21-bit inputs).
**
** inputs array of 32-bit inputs
** n number of elements in array
*/
void print_encoded_sol(uint32_t *inputs, uint32_t n)
{
uint8_t sol[ZCASH_SOL_LEN];
uint32_t i;
store_encoded_sol(sol, inputs, n);
for (i = 0; i < sizeof(sol); i++)
printf("%02x", sol[i]);
printf("\n");
fflush(stdout);
}
void print_sol(uint32_t *values, uint64_t *nonce)
{
uint32_t show_n_sols;
show_n_sols = (1 << PARAM_K);
if (verbose < 2)
show_n_sols = MIN(10, show_n_sols);
fprintf(stderr, "Soln:");
// for brievity, only print "small" nonces
if (*nonce < (1ULL << 32))
fprintf(stderr, " 0x%" PRIx64 ":", *nonce);
for (unsigned i = 0; i < show_n_sols; i++)
fprintf(stderr, " %x", values[i]);
fprintf(stderr, "%s\n", (show_n_sols != (1 << PARAM_K) ? "..." : ""));
}
/*
** Compare two 256-bit values interpreted as little-endian 256-bit integers.
*/
int32_t cmp_target_256(void *_a, void *_b)
{
uint8_t *a = _a;
uint8_t *b = _b;
int32_t i;
for (i = SHA256_TARGET_LEN - 1; i >= 0; i--)
if (a[i] != b[i])
return (int32_t)a[i] - b[i];
return 0;
}
/*
** Verify if the solution's block hash is under the target, and if yes print
** it formatted as:
** "sol: <job_id> <ntime> <nonce_rightpart> <solSize+sol>"
**
** Return 1 iff the block hash is under the target.
*/
uint32_t print_solver_line(uint32_t *values, uint8_t *header,
size_t fixed_nonce_bytes, uint8_t *target, char *job_id)
{
uint8_t buffer[ZCASH_BLOCK_HEADER_LEN + ZCASH_SOLSIZE_LEN +
ZCASH_SOL_LEN];
uint8_t hash0[SHA256_DIGEST_SIZE];
uint8_t hash1[SHA256_DIGEST_SIZE];
uint8_t *p;
p = buffer;
memcpy(p, header, ZCASH_BLOCK_HEADER_LEN);
p += ZCASH_BLOCK_HEADER_LEN;
memcpy(p, "\xfd\x40\x05", ZCASH_SOLSIZE_LEN);
p += ZCASH_SOLSIZE_LEN;
store_encoded_sol(p, values, 1 << PARAM_K);
Sha256_Onestep(buffer, sizeof(buffer), hash0);
Sha256_Onestep(hash0, sizeof(hash0), hash1);
// compare the double SHA256 hash with the target
if (cmp_target_256(target, hash1) < 0)
{
debug("Hash is above target\n");
return 0;
}
debug("Hash is under target\n");
printf("sol: %s ", job_id);
p = header + ZCASH_BLOCK_OFFSET_NTIME;
printf("%02x%02x%02x%02x ", p[0], p[1], p[2], p[3]);
printf("%s ", s_hexdump(header + ZCASH_BLOCK_HEADER_LEN - ZCASH_NONCE_LEN +
fixed_nonce_bytes, ZCASH_NONCE_LEN - fixed_nonce_bytes));
printf("%s%s\n", ZCASH_SOLSIZE_HEX,
s_hexdump(buffer + ZCASH_BLOCK_HEADER_LEN + ZCASH_SOLSIZE_LEN,
ZCASH_SOL_LEN));
fflush(stdout);
return 1;
}
int sol_cmp(const void *_a, const void *_b)
{
const uint32_t *a = _a;
const uint32_t *b = _b;
for (uint32_t i = 0; i < (1 << PARAM_K); i++)
{
if (*a != *b)
return *a - *b;
a++;
b++;
}
return 0;
}
/*
** Print all solutions.
**
** In mining mode, return the number of shares, that is the number of solutions
** that were under the target.
*/
uint32_t print_sols(sols_t *all_sols, uint64_t *nonce, uint32_t nr_valid_sols,
uint8_t *header, size_t fixed_nonce_bytes, uint8_t *target,
char *job_id)
{
uint8_t *valid_sols;
uint32_t counted;
uint32_t shares = 0;
valid_sols = malloc(nr_valid_sols * SOL_SIZE);
if (!valid_sols)
fatal("malloc: %s\n", strerror(errno));
counted = 0;
for (uint32_t i = 0; i < all_sols->nr; i++)
if (all_sols->valid[i])
{
if (counted >= nr_valid_sols)
fatal("Bug: more than %d solutions\n", nr_valid_sols);
memcpy(valid_sols + counted * SOL_SIZE, all_sols->values[i],
SOL_SIZE);
counted++;
}
assert(counted == nr_valid_sols);
// sort the solutions amongst each other, to make the solver's output
// deterministic and testable
qsort(valid_sols, nr_valid_sols, SOL_SIZE, sol_cmp);
for (uint32_t i = 0; i < nr_valid_sols; i++)
{
uint32_t *inputs = (uint32_t *)(valid_sols + i * SOL_SIZE);
if (!mining && show_encoded)
print_encoded_sol(inputs, 1 << PARAM_K);
if (verbose)
print_sol(inputs, nonce);
if (mining)
shares += print_solver_line(inputs, header, fixed_nonce_bytes,
target, job_id);
}
free(valid_sols);
return shares;
}
/*
** Sort a pair of binary blobs (a, b) which are consecutive in memory and
** occupy a total of 2*len 32-bit words.
**
** a points to the pair
** len number of 32-bit words in each pair
*/
void sort_pair(uint32_t *a, uint32_t len)
{
uint32_t *b = a + len;
uint32_t tmp, need_sorting = 0;
for (uint32_t i = 0; i < len; i++)
if (need_sorting || a[i] > b[i])
{
need_sorting = 1;
tmp = a[i];
a[i] = b[i];
b[i] = tmp;
}
else if (a[i] < b[i])
return;
}
/*
** If solution is invalid return 0. If solution is valid, sort the inputs
** and return 1.
*/
#define SEEN_LEN (1 << (PREFIX + 1)) / 8
uint32_t verify_sol(sols_t *sols, unsigned sol_i)
{
uint32_t *inputs = sols->values[sol_i];
//uint32_t seen_len = (1 << (PREFIX + 1)) / 8;
//uint8_t seen[seen_len]; // @mrb MSVC didn't like this.
uint8_t seen[SEEN_LEN];
uint32_t i;
uint8_t tmp;
// look for duplicate inputs
memset(seen, 0, SEEN_LEN);
for (i = 0; i < (1 << PARAM_K); i++)
{
if (inputs[i] / 8 >= SEEN_LEN)
{
warn("Invalid input retrieved from device: %d\n", inputs[i]);
sols->valid[sol_i] = 0;
return 0;
}
tmp = seen[inputs[i] / 8];
seen[inputs[i] / 8] |= 1 << (inputs[i] & 7);
if (tmp == seen[inputs[i] / 8])
{
// at least one input value is a duplicate
sols->valid[sol_i] = 0;
return 0;
}
}
// the valid flag is already set by the GPU, but set it again because
// I plan to change the GPU code to not set it
sols->valid[sol_i] = 1;
// sort the pairs in place
for (uint32_t level = 0; level < PARAM_K; level++)
for (i = 0; i < (1 << PARAM_K); i += (2 << level))
sort_pair(&inputs[i], 1 << level);
return 1;
}
/*
** Return the number of valid solutions.
*/
uint32_t verify_sols(cl_command_queue queue, cl_mem buf_sols, uint64_t *nonce,
uint8_t *header, size_t fixed_nonce_bytes, uint8_t *target,
char *job_id, uint32_t *shares, struct timeval *start_time)
{
sols_t *sols;
uint32_t nr_valid_sols;
sols = (sols_t *)malloc(sizeof(*sols));
if (!sols)
fatal("malloc: %s\n", strerror(errno));
#ifdef WIN32
timeBeginPeriod(1);
DWORD duration = (DWORD)kern_avg_run_time.tv_sec * 1000 + (DWORD)kern_avg_run_time.tv_usec / 1000;
if (!amd_flag && duration < 1000)
Sleep(duration);
#endif
check_clEnqueueReadBuffer(queue, buf_sols,
CL_TRUE, // cl_bool blocking_read
0, // size_t offset
sizeof(*sols), // size_t size
sols, // void *ptr
0, // cl_uint num_events_in_wait_list
NULL, // cl_event *event_wait_list
NULL); // cl_event *event
struct timeval curr_time;
gettimeofday(&curr_time, NULL);
struct timeval t_diff = time_diff(*start_time, curr_time);
double a_diff = t_diff.tv_sec * 1e6 + t_diff.tv_usec;
double kern_avg = kern_avg_run_time.tv_sec * 1e6 + kern_avg_run_time.tv_usec;
if (kern_avg == 0)
kern_avg = a_diff;
else
kern_avg = kern_avg * 70 / 100 + a_diff * 28 / 100; // it is 2% less than average
// thus allowing time to reduce
kern_avg_run_time.tv_sec = (time_t)(kern_avg / 1e6);
kern_avg_run_time.tv_usec = ((long)kern_avg) % 1000000;
if (sols->nr > MAX_SOLS)
{
fprintf(stderr, "%d (probably invalid) solutions were dropped!\n",
sols->nr - MAX_SOLS);
sols->nr = MAX_SOLS;
}
debug("Retrieved %d potential solutions\n", sols->nr);
nr_valid_sols = 0;
for (unsigned sol_i = 0; sol_i < sols->nr; sol_i++)
nr_valid_sols += verify_sol(sols, sol_i);
uint32_t sh = print_sols(sols, nonce, nr_valid_sols, header,
fixed_nonce_bytes, target, job_id);
if (shares)
*shares = sh;
if (!mining || verbose)
fprintf(stderr, "Nonce %s: %d sol%s\n",
s_hexdump(nonce, ZCASH_NONCE_LEN), nr_valid_sols,
nr_valid_sols == 1 ? "" : "s");
debug("Stats: %d likely invalids\n", sols->likely_invalids);
free(sols);
return nr_valid_sols;
}
unsigned get_value(unsigned *data, unsigned row)
{
return data[row];
}
/*
** Attempt to find Equihash solutions for the given Zcash block header and
** nonce. The 'header' passed in argument is a 140-byte header specifying
** the nonce, which this function may auto-increment if 'do_increment'. This
** allows repeatedly calling this fuction to solve different Equihash problems.
**
** header must be a buffer allocated with ZCASH_BLOCK_HEADER_LEN bytes
** header_len number of bytes initialized in header (either 140 or 108)
** shares if not NULL, in mining mode the number of shares (ie. number
** of solutions that were under the target) are stored here
**
** Return the number of solutions found.
*/
uint32_t solve_equihash(cl_device_id dev_id, cl_context ctx, cl_command_queue queue,
cl_kernel k_init_ht, cl_kernel *k_rounds, cl_kernel k_sols,
cl_mem *buf_ht, cl_mem buf_sols, cl_mem buf_dbg, size_t dbg_size,
uint8_t *header, size_t header_len, char do_increment,
size_t fixed_nonce_bytes, uint8_t *target, char *job_id,
uint32_t *shares, cl_mem *rowCounters, cl_mem buf_blake_st)
{
blake2b_state_t blake;
size_t global_ws;
size_t local_work_size = LOCAL_WORK_SIZE;
uint32_t sol_found = 0;
uint64_t *nonce_ptr;
int status;
cl_uint nr_compute_units;
status = clGetDeviceInfo(dev_id, CL_DEVICE_MAX_COMPUTE_UNITS, sizeof(nr_compute_units), &nr_compute_units, NULL);
if (status != CL_SUCCESS)
fatal("clGetDeviceInfo (%d)\n", status);
assert(header_len == ZCASH_BLOCK_HEADER_LEN);
if (mining)
assert(target && job_id);
nonce_ptr = (uint64_t *)(header + ZCASH_BLOCK_HEADER_LEN - ZCASH_NONCE_LEN);
if (do_increment)
{
// Increment the nonce
if (mining)
{
// increment bytes 17-19
(*(uint32_t *)((uint8_t *)nonce_ptr + 17))++;
// byte 20 and above must be zero
*(uint32_t *)((uint8_t *)nonce_ptr + 20) = 0;
}
else
// increment bytes 0-7
(*nonce_ptr)++;
}
debug("\nSolving nonce %s\n", s_hexdump(nonce_ptr, ZCASH_NONCE_LEN));
// Process first BLAKE2b-400 block
zcash_blake2b_init(&blake, ZCASH_HASH_LEN, PARAM_N, PARAM_K);
zcash_blake2b_update(&blake, header, 128, 0);
clEnqueueWriteBuffer(queue, buf_blake_st, CL_TRUE, 0, 64, &(blake.h), 0, NULL, NULL);
for (unsigned round = 0; round < PARAM_K; round++)
{