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44d75cf9bb2e943db5e71cfcc636302b63f885c9
triton/lib/driver/llvm.cc
apd10 44d75cf9bb Bugfix in ptxas path. (#487) 
Bug: "ret" value is destroyed when a failing "ptxas --version" is run
overwriting the previous valid "ret" value.

Fix: keep rets only for those runs which are successful. Pick the first
one
2022-04-12 13:07:28 +08:00

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/* Copyright 2015-2017 Philippe Tillet
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <fstream>
#if __has_include(<unistd.h>)
#include <unistd.h>
#endif
#include <memory>
#include <regex>
#include "triton/driver/llvm.h"
#include "triton/driver/dispatch.h"
#include "triton/driver/error.h"
#include "triton/tools/sha1.hpp"
#include "triton/tools/sys/getenv.hpp"
#include "triton/tools/sys/mkdir.hpp"
#include "triton/tools/sys/exec.hpp"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Verifier.h"
#include "llvm/IR/IRPrintingPasses.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/ExecutionEngine/ExecutionEngine.h"
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/Transforms/Utils/Cloning.h"
#include "llvm/Transforms/Scalar.h"
// begin AMD stuff
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
// end AMD stuff
extern "C"{
int set_curterm(char* nterm){ return 0; }
int del_curterm(char* nterm){ return 0; }
int tigetnum(char *capname) { return 0; }
int setupterm(char *term, int fildes, int *errret) { return 0; }
}
namespace triton{
namespace driver{
void init_llvm() {
LLVMInitializeNVPTXTargetInfo();
LLVMInitializeNVPTXTarget();
LLVMInitializeNVPTXTargetMC();
LLVMInitializeNVPTXAsmPrinter();
LLVMInitializeAMDGPUTargetInfo();
LLVMInitializeAMDGPUTarget();
LLVMInitializeAMDGPUTargetMC();
LLVMInitializeAMDGPUAsmPrinter();
}
/* ------------------------ */
// CUDA //
/* ------------------------ */
static bool find_and_replace(std::string& str, const std::string& begin, const std::string& end, const std::string& target){
size_t start_replace = str.find(begin);
size_t end_replace = str.find(end, start_replace);
if(start_replace == std::string::npos)
return false;
str.replace(start_replace, end_replace + 1 - start_replace, target);
return true;
}
std::string path_to_ptxas(int& version) {
std::vector<std::string> rets;
std::string ret;
// search pathes for ptxas
std::vector<std::string> ptxas_prefixes = {"", "/usr/local/cuda/bin/"};
std::string triton_ptxas = tools::getenv("TRITON_PTXAS_PATH");
if(!triton_ptxas.empty())
ptxas_prefixes.insert(ptxas_prefixes.begin(), triton_ptxas);
// see what path for ptxas are valid
std::vector<std::string> working_ptxas;
for(std::string prefix: ptxas_prefixes){
std::string ptxas = prefix + "ptxas";
bool works = tools::exec(ptxas + " --version 2>&1", ret) == 0;
if(works) {
working_ptxas.push_back(ptxas);
rets.push_back(ret);
}
}
// error if no working ptxas was found
if(working_ptxas.empty())
throw std::runtime_error("`ptxas` was searched in TRITON_PTXAS_PATH, /usr/local/cuda/bin/ or PATH"
" but a working version could not be found.");
std::string ptxas = working_ptxas.front();
// parse version
std::regex version_regex("release (\\d+)\\.(\\d+)");
std::smatch match;
bool found = false;
// currently choosing the first ptxas. Other logics can be implemented in future
for(std::string ret : rets) {
if(std::regex_search(ret, match, version_regex)){
int major = std::stoi(match[1]);
int minor = std::stoi(match[2]);
version = major*1000 + minor*10;
found = true;
break;
}
}
if ( not found) {
throw std::runtime_error("Error in parsing version");
}
return ptxas;
}
int vptx(int version){
if(version >= 11040) return 74;
if(version >= 11030) return 73;
if(version >= 11020) return 72;
if(version >= 11010) return 71;
if(version >= 11000) return 70;
if(version >= 10020) return 65;
if(version >= 10010) return 64;
if(version >= 10000) return 63;
throw std::runtime_error("Triton requires CUDA 10+");
}
std::string llir_to_ptx(llvm::Module* module, int cc, int version){
// LLVM version in use may not officially support target hardware
int max_nvvm_cc = 75;
int max_nvvm_ptx = 74;
// options
auto options = llvm::cl::getRegisteredOptions();
auto* short_ptr = static_cast<llvm::cl::opt<bool>*>(options["nvptx-short-ptr"]);
assert(short_ptr);
short_ptr->setValue(true);
// compute capability
std::string sm = "sm_" + std::to_string(cc);
// max PTX version
int ptx = vptx(version);
int ptx_major = ptx / 10;
int ptx_minor = ptx % 10;
// create
llvm::SmallVector<char, 0> buffer;
std::string triple = "nvptx64-nvidia-cuda";
std::string proc = "sm_" + std::to_string(std::min(cc, max_nvvm_cc));
std::string layout = "";
std::string features = "";
// std::string features = "+ptx" + std::to_string(std::min(ptx, max_nvvm_ptx));
init_llvm();
// verify and store llvm
llvm::legacy::PassManager pm;
pm.add(llvm::createVerifierPass());
pm.run(*module);
// module->print(llvm::outs(), nullptr);
// create machine
module->setTargetTriple(triple);
std::string error;
auto target = llvm::TargetRegistry::lookupTarget(module->getTargetTriple(), error);
llvm::TargetOptions opt;
opt.AllowFPOpFusion = llvm::FPOpFusion::Fast;
opt.UnsafeFPMath = false;
opt.NoInfsFPMath = false;
opt.NoNaNsFPMath = true;
llvm::TargetMachine *machine = target->createTargetMachine(module->getTargetTriple(), proc, features, opt,
llvm::Reloc::PIC_, llvm::None, llvm::CodeGenOpt::Aggressive);
// set data layout
if(layout.empty())
module->setDataLayout(machine->createDataLayout());
else
module->setDataLayout(layout);
// emit machine code
for (llvm::Function &f : module->functions())
f.addFnAttr(llvm::Attribute::AlwaysInline);
llvm::legacy::PassManager pass;
llvm::raw_svector_ostream stream(buffer);
// emit
machine->addPassesToEmitFile(pass, stream, nullptr, llvm::CodeGenFileType::CGFT_AssemblyFile);
pass.run(*module);
// post-process
std::string result(buffer.begin(), buffer.end());
find_and_replace(result, ".version", "\n", ".version " + std::to_string(ptx_major) + "." + std::to_string(ptx_minor) + "\n");
find_and_replace(result, ".target", "\n", ".target " + sm + "\n");
while(find_and_replace(result, "\t// begin inline asm", "\n", ""));
while(find_and_replace(result, "\t// end inline asm", "\n", ""));
return result;
}
std::string ptx_to_cubin(const std::string& ptx, const std::string& ptxas, int cc) {
// compile ptx with ptxas
char _fsrc[L_tmpnam];
char _flog[L_tmpnam];
std::tmpnam(_fsrc);
std::tmpnam(_flog);
std::string fsrc = _fsrc;
std::string flog = _flog;
std::string fbin = fsrc + ".o";
const char* _fbin = fbin.c_str();
std::ofstream ofs(fsrc);
ofs << ptx << std::endl;
ofs.close();
std::string cmd;
int err;
cmd = ptxas + " -v --gpu-name=sm_" + std::to_string(cc) + " " + fsrc + " -o " + fsrc + ".o 2> " + flog;
err = system(cmd.c_str());
if(err != 0){
std::ifstream _log(_flog);
std::string log(std::istreambuf_iterator<char>(_log), {});
unlink(_fsrc);
unlink(_flog);
throw std::runtime_error("Internal Triton PTX codegen error: \n" + log);
}
CUmodule ret;
std::ifstream _cubin(_fbin, std::ios::binary );
std::string cubin(std::istreambuf_iterator<char>(_cubin), {});
_cubin.close();
unlink(_fsrc);
unlink(_flog);
unlink(_fbin);
dispatch::cuModuleLoadData(&ret, cubin.c_str());
return cubin;
}
/* ------------------------ */
// HIP //
/* ------------------------ */
std::string llir_to_amdgpu(llvm::Module* module, const std::string& _proc) {
init_llvm();
// proc = std::get<0>(GetFeatureStrFromGCNArchName(rocminfo));
// features = std::get<1>(GetFeatureStrFromGCNArchName(rocminfo));
// create
llvm::SmallVector<char, 0> buffer;
std::string triple = "amdgcn-amd-amdhsa";
std::string layout = "";
std::string features;
std::string proc = "gfx908";
// verify and store llvm
llvm::legacy::PassManager pm;
pm.add(llvm::createVerifierPass());
pm.run(*module);
// create machine
module->setTargetTriple(triple);
std::string error;
auto target = llvm::TargetRegistry::lookupTarget(module->getTargetTriple(), error);
llvm::TargetOptions opt;
opt.AllowFPOpFusion = llvm::FPOpFusion::Fast;
opt.UnsafeFPMath = false;
opt.NoInfsFPMath = false;
opt.NoNaNsFPMath = true;
llvm::TargetMachine *machine = target->createTargetMachine(module->getTargetTriple(), proc, features, opt,
llvm::Reloc::PIC_, llvm::None,
llvm::CodeGenOpt::Aggressive);
// set data layout
if(layout.empty())
module->setDataLayout(machine->createDataLayout());
else
module->setDataLayout(layout);
// emit machine code
for (llvm::Function &f : module->functions())
f.addFnAttr(llvm::Attribute::AlwaysInline);
llvm::legacy::PassManager pass;
llvm::raw_svector_ostream stream(buffer);
// create dump files
std::string module_name = module->getModuleIdentifier();
std::error_code ec;
// Save GCN ISA binary.
std::string isabin_path = std::string("/tmp/") + module_name + std::string(".o");
std::unique_ptr<llvm::raw_fd_ostream> isabin_fs(
new llvm::raw_fd_ostream(isabin_path, ec, llvm::sys::fs::OF_Text));
if (ec)
{
std::cout << isabin_path << " was not created. error code: " << ec << std::endl;
}
// emit
machine->addPassesToEmitFile(pass, *isabin_fs, nullptr, llvm::CGFT_ObjectFile);
pass.run(*module);
// Save GCN ISA.
std::string amdgcn_path = std::string("/tmp/") + module_name + std::string(".gcn");
std::string result(buffer.begin(), buffer.end());
std::ofstream amdgcn(amdgcn_path);
amdgcn << result;
amdgcn.close();
// generate HASCO file
std::string hsaco_path = std::string("/tmp/") + module_name + std::string(".hsaco");
std::string error_message;
int lld_result =
llvm::sys::ExecuteAndWait("/opt/rocm/llvm/bin/ld.lld",
{"/opt/rocm/llvm/bin/ld.lld", "-flavor", "gnu", "-shared", "-o", hsaco_path, isabin_path},
llvm::None, {}, 0, 0, &error_message);
if (lld_result)
{
std::cout << "ld.lld execute fail: " << std::endl;
std::cout << error_message << std::endl;
std::cout << lld_result << std::endl;
}
return hsaco_path;
}
hipModule_t amdgpu_to_hipmodule(const std::string& path) {
// Read HSACO.
std::ifstream hsaco_file(path, std::ios::binary | std::ios::ate);
std::ifstream::pos_type hsaco_file_size = hsaco_file.tellg();
std::vector<unsigned char> hsaco(hsaco_file_size);
hsaco_file.seekg(0, std::ios::beg);
hsaco_file.read(reinterpret_cast<char*>(&hsaco[0]), hsaco_file_size);
hsaco_file.close();
hipJitOption opt[] = {hipJitOptionErrorLogBufferSizeBytes, hipJitOptionErrorLogBuffer,
hipJitOptionInfoLogBufferSizeBytes, hipJitOptionInfoLogBuffer,
hipJitOptionLogVerbose};
const unsigned int errbufsize = 8192;
const unsigned int logbufsize = 8192;
char _err[errbufsize];
char _log[logbufsize];
void* optval[] = {(void*)(uintptr_t)errbufsize,
(void*)_err, (void*)(uintptr_t)logbufsize,
(void*)_log, (void*)1};
hipModule_t ret;
dispatch::hipModuleLoadDataEx(&ret, hsaco.data(), 5, opt, optval);
return ret;
}
}
}
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