boinc/lib/coproc.cpp

796 lines
24 KiB
C++

// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2007 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
#if defined(_WIN32) && !defined(__STDWX_H__)
#include "boinc_win.h"
#elif defined(_WIN32) && defined(__STDWX_H__)
#include "stdwx.h"
#else
#ifdef _USING_FCGI_
#include "boinc_fcgi.h"
#else
#include <cstdio>
#endif
#include <cstring>
#include <cstdlib>
#endif
#ifdef _WIN32
#include "win_util.h"
#else
#ifdef __APPLE__
// Suppress obsolete warning when building for OS 10.3.9
#define DLOPEN_NO_WARN
#include <mach-o/dyld.h>
#endif
#include "config.h"
#include <dlfcn.h>
#include <setjmp.h>
#include <signal.h>
#endif
#include "error_numbers.h"
#include "filesys.h"
#include "parse.h"
#include "str_replace.h"
#include "util.h"
#include "coproc.h"
#ifndef _USING_FCGI_
using std::perror;
#endif
int COPROC_REQ::parse(XML_PARSER& xp) {
strcpy(type, "");
count = 0;
while (!xp.get_tag()) {
if (xp.match_tag("/coproc")) {
if (!strlen(type)) return ERR_XML_PARSE;
return 0;
}
if (xp.parse_str("type", type, sizeof(type))) continue;
if (xp.parse_double("count", count)) continue;
}
return ERR_XML_PARSE;
}
#ifndef _USING_FCGI_
void COPROC::write_xml(MIOFILE& f) {
f.printf(
"<coproc>\n"
" <type>%s</type>\n"
" <count>%d</count>\n"
"</coproc>\n",
type, count
);
}
void COPROC::write_request(MIOFILE& f) {
f.printf(
" <req_secs>%f</req_secs>\n"
" <req_instances>%f</req_instances>\n"
" <estimated_delay>%f</estimated_delay>\n",
req_secs,
req_instances,
estimated_delay
);
}
void OPENCL_DEVICE_PROP::write_xml(MIOFILE& f) {
f.printf(
" <coproc_opencl>\n"
" <name>%s</name>\n"
" <vendor>%s</vendor>\n"
" <vendor_id>%lu</vendor_id>\n"
" <available>%d</available>\n"
" <half_fp_config>%llu</half_fp_config>\n"
" <single_fp_config>%llu</single_fp_config>\n"
" <double_fp_config>%llu</double_fp_config>\n"
" <endian_little>%d</endian_little>\n"
" <execution_capabilities>%llu</execution_capabilities>\n"
" <extensions>%s</extensions>\n"
" <global_mem_size>%llu</global_mem_size>\n"
" <local_mem_size>%llu</local_mem_size>\n"
" <max_clock_frequency>%lu</max_clock_frequency>\n"
" <max_compute_units>%lu</max_compute_units>\n"
" <opencl_platform_version>%s</opencl_platform_version>\n"
" <opencl_device_version>%s</opencl_device_version>\n"
" <opencl_driver_version>%s</opencl_driver_version>\n"
" </coproc_opencl>\n",
name,
vendor,
vendor_id,
available ? 1 : 0,
half_fp_config,
single_fp_config,
double_fp_config,
endian_little ? 1 : 0,
execution_capabilities,
extensions,
global_mem_size,
local_mem_size,
max_clock_frequency,
max_compute_units,
opencl_platform_version,
opencl_device_version,
opencl_driver_version
);
}
int COPROC::parse(XML_PARSER& xp) {
char buf[256];
strcpy(type, "");
clear();
for (int i=0; i<MAX_COPROC_INSTANCES; i++) {
device_nums[i] = i;
}
while (!xp.get_tag()) {
if (!xp.is_tag) continue;
if (xp.match_tag("/coproc")) {
if (!strlen(type)) return ERR_XML_PARSE;
return 0;
}
if (xp.parse_str("type", type, sizeof(type))) continue;
if (xp.parse_int("count", count)) continue;
if (xp.parse_double("peak_flops", peak_flops)) continue;
if (xp.parse_str("device_nums", buf, sizeof(buf))) {
int i=0;
char* p = strtok(buf, " ");
while (p && i<MAX_COPROC_INSTANCES) {
device_nums[i++] = atoi(p);
p = strtok(NULL, " ");
}
continue;
}
}
return ERR_XML_PARSE;
}
#endif
int OPENCL_DEVICE_PROP::parse(XML_PARSER& xp) {
int n;
unsigned long long ull;
while (!xp.get_tag()) {
if (xp.match_tag("/coproc_opencl")) {
get_device_version_int();
return 0;
}
if (xp.parse_str("name", name, sizeof(name))) continue;
if (xp.parse_str("vendor", vendor, sizeof(vendor))) continue;
if (xp.parse_int("available", n)) {
available = n;
continue;
}
if (xp.parse_ulonglong("half_fp_config", ull)) {
half_fp_config = ull;
continue;
}
if (xp.parse_ulonglong("single_fp_config", ull)) {
single_fp_config = ull;
continue;
}
if (xp.parse_ulonglong("double_fp_config", ull)) {
double_fp_config = ull;
continue;
}
if (xp.parse_int("endian_little", n)) {
endian_little = n;
continue;
}
if (xp.parse_ulonglong("execution_capabilities", ull)) {
execution_capabilities = ull;
continue;
}
if (xp.parse_str("extensions",
extensions,
sizeof(extensions)
)) {
continue;
}
if (xp.parse_ulonglong("global_mem_size", ull)) {
global_mem_size = ull;
continue;
}
if (xp.parse_ulonglong("local_mem_size", ull)) {
local_mem_size = ull;
continue;
}
if (xp.parse_int("max_clock_frequency", n)) {
max_clock_frequency = n;
continue;
}
if (xp.parse_int("max_compute_units", n)) {
max_compute_units = n;
continue;
}
if (xp.parse_str("opencl_platform_version",
opencl_platform_version,
sizeof(opencl_platform_version)
)) {
continue;
}
if (xp.parse_str("opencl_device_version",
opencl_device_version,
sizeof(opencl_device_version)
)) {
continue;
}
if (xp.parse_str("opencl_driver_version",
opencl_driver_version,
sizeof(opencl_driver_version)
)) {
continue;
}
}
return ERR_XML_PARSE;
}
int OPENCL_DEVICE_PROP::get_device_version_int() {
int maj, min;
int n = sscanf(
opencl_device_version, "OpenCL %d.%d", &maj, &min
);
if (n != 2) {
return ERR_NOT_FOUND;
}
opencl_device_version_int = 100*maj + min;
return 0;
}
void OPENCL_DEVICE_PROP::description(char* buf, const char* type) {
char s1[256], s2[256];
int n;
// openCL_device_version may have a trailing space
strlcpy(s1, opencl_device_version, sizeof(s1));
n = (int)strlen(s1) - 1;
if ((n > 0) && (s1[n] == ' ')) s1[n] = '\0';
sprintf(s2, "%s (driver version %s, device version %s, %.0fMB, %.0fMB available)",
name, opencl_driver_version, s1, global_mem_size/MEGA, opencl_available_ram/MEGA
);
switch(is_used) {
case COPROC_IGNORED:
sprintf(buf, "OpenCL: %s GPU %d (ignored by config): %s", type, device_num, s2);
break;
case COPROC_USED:
sprintf(buf, "OpenCL: %s GPU %d: %s", type, device_num, s2);
break;
case COPROC_UNUSED:
default:
sprintf(buf, "OpenCL: %s GPU %d (not used): %s", type, device_num, s2);
break;
}
}
void COPROCS::summary_string(char* buf, int len) {
char buf2[1024];
strcpy(buf, "");
if (nvidia.count) {
int mem = (int)(nvidia.prop.dtotalGlobalMem/MEGA);
sprintf(buf2, "[CUDA|%s|%d|%dMB|%d]",
nvidia.prop.name, nvidia.count, mem, nvidia.display_driver_version
);
strlcat(buf, buf2, len);
}
if (ati.count) {
sprintf(buf2,"[CAL|%s|%d|%dMB|%s]",
ati.name, ati.count, ati.attribs.localRAM, ati.version
);
strlcat(buf, buf2, len);
}
}
int COPROCS::parse(XML_PARSER& xp) {
int retval;
clear();
n_rsc = 1;
strcpy(coprocs[0].type, "CPU");
while (!xp.get_tag()) {
if (xp.match_tag("/coprocs")) {
return 0;
}
if (xp.match_tag("coproc_cuda")) {
retval = nvidia.parse(xp);
if (retval) {
nvidia.clear();
} else {
coprocs[n_rsc++] = nvidia;
}
continue;
}
if (xp.match_tag("coproc_ati")) {
retval = ati.parse(xp);
if (retval) {
ati.clear();
} else {
coprocs[n_rsc++] = ati;
}
continue;
}
}
return ERR_XML_PARSE;
}
void COPROCS::write_xml(MIOFILE& mf, bool include_request) {
#ifndef _USING_FCGI_
//TODO: Write coprocs[0] through coprocs[n_rsc]
mf.printf(" <coprocs>\n");
if (nvidia.count) {
nvidia.write_xml(mf, include_request);
}
if (ati.count) {
ati.write_xml(mf, include_request);
}
mf.printf(" </coprocs>\n");
#endif
}
void COPROC_NVIDIA::description(char* buf) {
char vers[256], cuda_vers[256];
if (display_driver_version) {
#ifdef __APPLE__
int maj = display_driver_version >> 16;
int min = (display_driver_version >> 8) & 0xff;
int rev = display_driver_version & 0xff;
sprintf(vers, "%d.%d.%d", maj, min, rev);
#else
int maj = display_driver_version/100;
int min = display_driver_version%100;
sprintf(vers, "%d.%d", maj, min);
#endif
} else {
strcpy(vers, "unknown");
}
if (cuda_version) {
int maj = cuda_version/1000;
int min = cuda_version%1000;
sprintf(cuda_vers, "%d.%d", maj, min);
} else {
strcpy(cuda_vers, "unknown");
}
sprintf(buf, "%s (driver version %s, CUDA version %s, compute capability %d.%d, %.0fMB, %.0fMB available, %.0f GFLOPS peak)",
prop.name, vers, cuda_vers, prop.major, prop.minor,
prop.totalGlobalMem/MEGA, available_ram/MEGA, peak_flops/1e9
);
}
#ifndef _USING_FCGI_
void COPROC_NVIDIA::write_xml(MIOFILE& f, bool include_request) {
f.printf(
"<coproc_cuda>\n"
" <count>%d</count>\n"
" <name>%s</name>\n"
" <available_ram>%f</available_ram>\n"
" <have_cuda>%d</have_cuda>\n"
" <have_opencl>%d</have_opencl>\n",
count,
prop.name,
available_ram,
have_cuda ? 1 : 0,
have_opencl ? 1 : 0
);
if (include_request) {
write_request(f);
}
f.printf(
" <peak_flops>%f</peak_flops>\n"
" <cudaVersion>%d</cudaVersion>\n"
" <drvVersion>%d</drvVersion>\n"
" <deviceHandle>%p</deviceHandle>\n"
" <totalGlobalMem>%u</totalGlobalMem>\n"
" <sharedMemPerBlock>%u</sharedMemPerBlock>\n"
" <regsPerBlock>%d</regsPerBlock>\n"
" <warpSize>%d</warpSize>\n"
" <memPitch>%u</memPitch>\n"
" <maxThreadsPerBlock>%d</maxThreadsPerBlock>\n"
" <maxThreadsDim>%d %d %d</maxThreadsDim>\n"
" <maxGridSize>%d %d %d</maxGridSize>\n"
" <clockRate>%d</clockRate>\n"
" <totalConstMem>%u</totalConstMem>\n"
" <major>%d</major>\n"
" <minor>%d</minor>\n"
" <textureAlignment>%u</textureAlignment>\n"
" <deviceOverlap>%d</deviceOverlap>\n"
" <multiProcessorCount>%d</multiProcessorCount>\n",
peak_flops,
cuda_version,
display_driver_version,
prop.deviceHandle,
(unsigned int)prop.totalGlobalMem,
(unsigned int)prop.sharedMemPerBlock,
prop.regsPerBlock,
prop.warpSize,
(unsigned int)prop.memPitch,
prop.maxThreadsPerBlock,
prop.maxThreadsDim[0], prop.maxThreadsDim[1], prop.maxThreadsDim[2],
prop.maxGridSize[0], prop.maxGridSize[1], prop.maxGridSize[2],
prop.clockRate,
(unsigned int)prop.totalConstMem,
prop.major,
prop.minor,
(unsigned int)prop.textureAlignment,
prop.deviceOverlap,
prop.multiProcessorCount
);
if (have_opencl) {
opencl_prop.write_xml(f);
}
f.printf("</coproc_cuda>\n");
}
#endif
void COPROC_NVIDIA::clear() {
COPROC::clear();
strcpy(type, GPU_TYPE_NVIDIA);
estimated_delay = -1; // mark as absent
cuda_version = 0;
display_driver_version = 0;
strcpy(prop.name, "");
prop.deviceHandle = 0;
prop.totalGlobalMem = 0;
prop.sharedMemPerBlock = 0;
prop.regsPerBlock = 0;
prop.warpSize = 0;
prop.memPitch = 0;
prop.maxThreadsPerBlock = 0;
prop.maxThreadsDim[0] = 0;
prop.maxThreadsDim[1] = 0;
prop.maxThreadsDim[2] = 0;
prop.maxGridSize[0] = 0;
prop.maxGridSize[1] = 0;
prop.maxGridSize[2] = 0;
prop.clockRate = 0;
prop.totalConstMem = 0;
prop.major = 0;
prop.minor = 0;
prop.textureAlignment = 0;
prop.deviceOverlap = 0;
prop.multiProcessorCount = 0;
}
int COPROC_NVIDIA::parse(XML_PARSER& xp) {
char buf2[256];
int retval;
clear();
while (!xp.get_tag()) {
if (xp.match_tag("/coproc_cuda")) {
if (!peak_flops) {
set_peak_flops();
}
if (!available_ram) {
available_ram = prop.dtotalGlobalMem;
}
return 0;
}
if (xp.parse_int("count", count)) continue;
if (xp.parse_double("peak_flops", peak_flops)) continue;
if (xp.parse_bool("have_cuda", have_cuda)) continue;
if (xp.parse_bool("have_opencl", have_opencl)) continue;
if (xp.parse_double("available_ram", available_ram)) continue;
if (xp.parse_double("req_secs", req_secs)) continue;
if (xp.parse_double("req_instances", req_instances)) continue;
if (xp.parse_double("estimated_delay", estimated_delay)) continue;
if (xp.parse_int("cudaVersion", cuda_version)) continue;
if (xp.parse_int("drvVersion", display_driver_version)) continue;
if (xp.parse_str("name", prop.name, sizeof(prop.name))) continue;
if (xp.parse_int("deviceHandle", prop.deviceHandle)) continue;
if (xp.parse_double("totalGlobalMem", prop.dtotalGlobalMem)) {
prop.totalGlobalMem = (int)prop.dtotalGlobalMem;
continue;
}
if (xp.parse_int("sharedMemPerBlock", (int&)prop.sharedMemPerBlock)) continue;
if (xp.parse_int("regsPerBlock", prop.regsPerBlock)) continue;
if (xp.parse_int("warpSize", prop.warpSize)) continue;
if (xp.parse_int("memPitch", (int&)prop.memPitch)) continue;
if (xp.parse_int("maxThreadsPerBlock", prop.maxThreadsPerBlock)) continue;
if (xp.parse_str("maxThreadsDim", buf2, sizeof(buf2))) {
// can't use sscanf here (FCGI)
//
prop.maxThreadsDim[0] = atoi(buf2);
char* p = strchr(buf2, ' ');
if (p) {
p++;
prop.maxThreadsDim[1] = atoi(p);
p = strchr(p, ' ');
if (p) {
p++;
prop.maxThreadsDim[2] = atoi(p);
}
}
continue;
}
if (xp.parse_str("maxGridSize", buf2, sizeof(buf2))) {
prop.maxGridSize[0] = atoi(buf2);
char* p = strchr(buf2, ' ');
if (p) {
p++;
prop.maxGridSize[1] = atoi(p);
p = strchr(p, ' ');
if (p) {
p++;
prop.maxGridSize[2] = atoi(p);
}
}
continue;
}
if (xp.parse_int("clockRate", prop.clockRate)) continue;
if (xp.parse_int("totalConstMem", (int&)prop.totalConstMem)) continue;
if (xp.parse_int("major", prop.major)) continue;
if (xp.parse_int("minor", prop.minor)) continue;
if (xp.parse_int("textureAlignment", (int&)prop.textureAlignment)) continue;
if (xp.parse_int("deviceOverlap", prop.deviceOverlap)) continue;
if (xp.parse_int("multiProcessorCount", prop.multiProcessorCount)) continue;
if (xp.match_tag("coproc_opencl")) {
retval = opencl_prop.parse(xp);
if (retval) return retval;
continue;
}
}
return ERR_XML_PARSE;
}
void COPROC_NVIDIA::set_peak_flops() {
double x=0;
if (prop.clockRate) {
int flops_per_clock=0, cores_per_proc=0;
switch (prop.major) {
case 1:
flops_per_clock = 3;
cores_per_proc = 8;
break;
case 2:
flops_per_clock = 2;
switch (prop.minor) {
case 0:
cores_per_proc = 32;
break;
default:
cores_per_proc = 48;
break;
}
}
// clock rate is scaled down by 1000
//
x = (1000.*prop.clockRate) * prop.multiProcessorCount * cores_per_proc * flops_per_clock;
} else if (opencl_prop.max_compute_units) {
// OpenCL doesn't give us compute capability.
// assume cores_per_proc is 8 and flops_per_clock is 2
//
x = opencl_prop.max_compute_units * 8 * 2 * opencl_prop.max_clock_frequency * 1e6;
}
peak_flops = (x>0)?x:5e10;
}
////////////////// ATI STARTS HERE /////////////////
#ifndef _USING_FCGI_
void COPROC_ATI::write_xml(MIOFILE& f, bool include_request) {
f.printf(
"<coproc_ati>\n"
" <count>%d</count>\n"
" <name>%s</name>\n"
" <available_ram>%f</available_ram>\n"
" <have_cal>%d</have_cal>\n"
" <have_opencl>%d</have_opencl>\n",
count,
name,
available_ram,
have_cal ? 1 : 0,
have_opencl ? 1 : 0
);
if (include_request) {
write_request(f);
}
f.printf(
" <peak_flops>%f</peak_flops>\n"
" <CALVersion>%s</CALVersion>\n"
" <target>%d</target>\n"
" <localRAM>%d</localRAM>\n"
" <uncachedRemoteRAM>%d</uncachedRemoteRAM>\n"
" <cachedRemoteRAM>%d</cachedRemoteRAM>\n"
" <engineClock>%u</engineClock>\n"
" <memoryClock>%d</memoryClock>\n"
" <wavefrontSize>%d</wavefrontSize>\n"
" <numberOfSIMD>%d</numberOfSIMD>\n"
" <doublePrecision>%d</doublePrecision>\n"
" <pitch_alignment>%d</pitch_alignment>\n"
" <surface_alignment>%d</surface_alignment>\n"
" <maxResource1DWidth>%d</maxResource1DWidth>\n"
" <maxResource2DWidth>%d</maxResource2DWidth>\n"
" <maxResource2DHeight>%d</maxResource2DHeight>\n",
peak_flops,
version,
attribs.target,
attribs.localRAM,
attribs.uncachedRemoteRAM,
attribs.cachedRemoteRAM,
attribs.engineClock,
attribs.memoryClock,
attribs.wavefrontSize,
attribs.numberOfSIMD,
attribs.doublePrecision,
attribs.pitch_alignment,
attribs.surface_alignment,
info.maxResource1DWidth,
info.maxResource2DWidth,
info.maxResource2DHeight
);
if (atirt_detected) {
f.printf(" <atirt_detected/>\n");
}
if (amdrt_detected) {
f.printf(" <amdrt_detected/>\n");
}
if (have_opencl) {
opencl_prop.write_xml(f);
}
f.printf("</coproc_ati>\n");
};
#endif
void COPROC_ATI::clear() {
COPROC::clear();
strcpy(type, GPU_TYPE_ATI);
estimated_delay = -1;
strcpy(name, "");
strcpy(version, "");
atirt_detected = false;
amdrt_detected = false;
memset(&attribs, 0, sizeof(attribs));
memset(&info, 0, sizeof(info));
version_num = 0;
}
int COPROC_ATI::parse(XML_PARSER& xp) {
int n, retval;
clear();
while (!xp.get_tag()) {
if (xp.match_tag("/coproc_ati")) {
if (strlen(version)) {
int major, minor, release;
n = sscanf(version, "%d.%d.%d", &major, &minor, &release);
if (n ==3) {
version_num = ati_version_int(major, minor, release);
}
}
if (!peak_flops) {
set_peak_flops();
}
if (!available_ram) {
available_ram = attribs.localRAM*MEGA;
}
return 0;
}
if (xp.parse_int("count", count)) continue;
if (xp.parse_double("peak_flops", peak_flops)) continue;
if (xp.parse_bool("have_cal", have_cal)) continue;
if (xp.parse_bool("have_opencl", have_opencl)) continue;
if (xp.parse_double("available_ram", available_ram)) continue;
if (xp.parse_double("req_secs", req_secs)) continue;
if (xp.parse_double("req_instances", req_instances)) continue;
if (xp.parse_double("estimated_delay", estimated_delay)) continue;
if (xp.parse_str("name", name, sizeof(name))) continue;
if (xp.parse_str("CALVersion", version, sizeof(version))) continue;
if (xp.parse_bool("amdrt_detected", amdrt_detected)) continue;
if (xp.parse_bool("atirt_detected", atirt_detected)) continue;
if (xp.parse_int("target", n)) {
attribs.target = (CALtarget)n;
continue;
}
if (xp.parse_int("localRAM", n)) {
attribs.localRAM = n;
continue;
}
if (xp.parse_int("uncachedRemoteRAM", n)) {
attribs.uncachedRemoteRAM = n;
continue;
}
if (xp.parse_int("cachedRemoteRAM", n)) {
attribs.cachedRemoteRAM = n;
continue;
}
if (xp.parse_int("engineClock", n)) {
attribs.engineClock = n;
continue;
}
if (xp.parse_int("memoryClock", n)) {
attribs.memoryClock = n;
continue;
}
if (xp.parse_int("wavefrontSize", n)) {
attribs.wavefrontSize = n;
continue;
}
if (xp.parse_int("numberOfSIMD" , n)) {
attribs.numberOfSIMD = n;
continue;
}
if (xp.parse_int("doublePrecision", n)) {
attribs.doublePrecision = n?CAL_TRUE:CAL_FALSE;
continue;
}
if (xp.parse_int("pitch_alignment", n)) {
attribs.pitch_alignment = n;
continue;
}
if (xp.parse_int("surface_alignment", n)) {
attribs.surface_alignment = n;
continue;
}
if (xp.parse_int("maxResource1DWidth", n)) {
info.maxResource1DWidth = n;
continue;
}
if (xp.parse_int("maxResource2DWidth", n)) {
info.maxResource2DWidth = n;
continue;
}
if (xp.parse_int("maxResource2DHeight", n)) {
info.maxResource2DHeight = n;
continue;
}
if (xp.match_tag("coproc_opencl")) {
retval = opencl_prop.parse(xp);
if (retval) return retval;
continue;
}
}
return ERR_XML_PARSE;
}
void COPROC_ATI::description(char* buf) {
sprintf(buf, "%s (CAL version %s, %dMB, %.0fMB available, %.0f GFLOPS peak)",
name, version, attribs.localRAM, available_ram/MEGA, peak_flops/1.e9
);
}
void COPROC_ATI::set_peak_flops() {
double x = 0;
if (attribs.numberOfSIMD) {
x = attribs.numberOfSIMD * attribs.wavefrontSize * 5 * attribs.engineClock * 1.e6;
// clock is in MHz
} else if (opencl_prop.max_compute_units) {
// OpenCL gives us only:
// - max_compute_units
// (which I'll assume is the same as attribs.numberOfSIMD)
// - max_clock_frequency (which I'll assume is the same as engineClock)
// It doesn't give wavefrontSize, which can be 16/32/64.
// So let's be conservative and use 16
//
x = opencl_prop.max_compute_units * 16 * 5 * opencl_prop.max_clock_frequency * 1e6;
}
peak_flops = (x>0)?x:5e10;
}