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utils.cpp
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utils.cpp
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/*******************************************************************************
* Copyright 2018-2024 Intel Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
#ifdef _WIN32
#include <malloc.h>
#include <windows.h>
#endif
#if defined __unix__ || defined __APPLE__ || defined __FreeBSD__ \
|| defined __Fuchsia__
#include <unistd.h>
#endif
#ifdef __unix__
#include <sys/stat.h>
#include <sys/types.h>
#endif
#include <algorithm>
#include <climits>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <mutex>
#include <string>
#include "oneapi/dnnl/dnnl.h"
#include "memory_debug.hpp"
#include "utils.hpp"
#if DNNL_CPU_RUNTIME != DNNL_RUNTIME_NONE
#include "cpu/platform.hpp"
#endif
namespace dnnl {
namespace impl {
int getenv(const char *name, char *buffer, int buffer_size) {
if (name == nullptr || buffer_size < 0
|| (buffer == nullptr && buffer_size > 0))
return INT_MIN;
int result = 0;
int term_zero_idx = 0;
size_t value_length = 0;
#ifdef _WIN32
value_length = GetEnvironmentVariable(name, buffer, buffer_size);
#else
const char *value = ::getenv(name);
value_length = value == nullptr ? 0 : strlen(value);
#endif
if (value_length > INT_MAX)
result = INT_MIN;
else {
int int_value_length = (int)value_length;
if (int_value_length >= buffer_size) {
result = -int_value_length;
} else {
term_zero_idx = int_value_length;
result = int_value_length;
#ifndef _WIN32
if (value) strncpy(buffer, value, buffer_size - 1);
#endif
}
}
if (buffer != nullptr) buffer[term_zero_idx] = '\0';
return result;
}
int getenv_int(const char *name, int default_value) {
int value = default_value;
// # of digits in the longest 32-bit signed int + sign + terminating null
const int len = 12;
char value_str[len];
if (getenv(name, value_str, len) > 0) value = atoi(value_str);
return value;
}
int getenv_int_user(const char *name, int default_value) {
int value = default_value;
// # of digits in the longest 32-bit signed int + sign + terminating null
const int len = 12;
char value_str[len];
for (const auto &prefix : {"ONEDNN_", "DNNL_"}) {
std::string name_str = std::string(prefix) + std::string(name);
if (getenv(name_str.c_str(), value_str, len) > 0) {
value = atoi(value_str);
break;
}
}
return value;
}
std::string getenv_string_user(const char *name) {
// Random number to fit possible string input.
std::string value;
const int len = 128;
char value_str[len];
for (const auto &prefix : {"ONEDNN_", "DNNL_"}) {
std::string name_str = std::string(prefix) + std::string(name);
if (getenv(name_str.c_str(), value_str, len) > 0) {
value = value_str;
break;
}
}
std::transform(value.begin(), value.end(), value.begin(), ::tolower);
return value;
}
FILE *fopen(const char *filename, const char *mode) {
#ifdef _WIN32
FILE *fp = NULL;
return ::fopen_s(&fp, filename, mode) ? NULL : fp;
#else
return ::fopen(filename, mode);
#endif
}
int getpagesize() {
#ifdef _WIN32
SYSTEM_INFO info;
GetSystemInfo(&info);
return info.dwPageSize;
#else
return ::getpagesize();
#endif
}
void *malloc(size_t size, int alignment) {
void *ptr;
if (memory_debug::is_mem_debug())
return memory_debug::malloc(size, alignment);
#ifdef _WIN32
ptr = _aligned_malloc(size, alignment);
int rc = ptr ? 0 : -1;
#else
int rc = ::posix_memalign(&ptr, alignment, size);
#endif
return (rc == 0) ? ptr : nullptr;
}
void free(void *p) {
if (memory_debug::is_mem_debug()) return memory_debug::free(p);
#ifdef _WIN32
_aligned_free(p);
#else
::free(p);
#endif
}
// Atomic operations
int32_t fetch_and_add(int32_t *dst, int32_t val) {
#ifdef _WIN32
return InterlockedExchangeAdd(reinterpret_cast<long *>(dst), val);
#else
return __sync_fetch_and_add(dst, val);
#endif
}
static setting_t<bool> jit_dump {false};
bool get_jit_dump() {
if (!jit_dump.initialized()) {
static bool val = getenv_int_user("JIT_DUMP", jit_dump.get());
jit_dump.set(val);
}
return jit_dump.get();
}
#if defined(DNNL_AARCH64) && (DNNL_AARCH64 == 1)
static setting_t<unsigned> jit_profiling_flags {DNNL_JIT_PROFILE_LINUX_PERFMAP};
#else
static setting_t<unsigned> jit_profiling_flags {DNNL_JIT_PROFILE_VTUNE};
#endif
unsigned get_jit_profiling_flags() {
MAYBE_UNUSED(jit_profiling_flags);
unsigned flag = 0;
#if DNNL_CPU_RUNTIME != DNNL_RUNTIME_NONE
if (!jit_profiling_flags.initialized()) {
static unsigned val
= getenv_int_user("JIT_PROFILE", jit_profiling_flags.get());
jit_profiling_flags.set(val);
}
flag = jit_profiling_flags.get();
#endif
return flag;
}
static setting_t<std::string> jit_profiling_jitdumpdir;
dnnl_status_t init_jit_profiling_jitdumpdir(
const char *jitdumpdir, bool overwrite) {
#ifdef __linux__
static std::mutex m;
std::lock_guard<std::mutex> g(m);
if (jit_profiling_jitdumpdir.initialized() && !overwrite)
return status::success;
if (!jitdumpdir) {
char buf[PATH_MAX];
if (getenv("JITDUMPDIR", buf, sizeof(buf)) > 0)
jit_profiling_jitdumpdir.set(buf);
else if (getenv("HOME", buf, sizeof(buf)) > 0)
jit_profiling_jitdumpdir.set(buf);
else
jit_profiling_jitdumpdir.set(".");
} else
jit_profiling_jitdumpdir.set(jitdumpdir);
return status::success;
#else
UNUSED(jit_profiling_jitdumpdir);
return status::unimplemented;
#endif
}
std::string get_jit_profiling_jitdumpdir() {
std::string jitdumpdir;
#if DNNL_CPU_RUNTIME != DNNL_RUNTIME_NONE
if (!jit_profiling_jitdumpdir.initialized()) {
auto status = init_jit_profiling_jitdumpdir(nullptr, false);
if (status != status::success) return std::string();
}
jitdumpdir = jit_profiling_jitdumpdir.get();
#endif
return jitdumpdir;
}
bool is_destroying_cache_safe() {
#if defined(_WIN32) \
&& (defined(DNNL_WITH_SYCL) || DNNL_GPU_RUNTIME == DNNL_RUNTIME_OCL)
// The ntdll.dll library is located in system32, therefore setting
// additional environment is not required.
HMODULE handle = LoadLibraryExA(
"ntdll.dll", nullptr, LOAD_LIBRARY_SEARCH_SYSTEM32);
if (!handle) { return false; }
// RtlDllShutdownInProgress returns TRUE if the whole process terminates
// and FALSE if DLL is being unloaded dynamically or if it’s called from
// an executable.
auto f = reinterpret_cast<BOOLEAN (*)(void)>(
GetProcAddress(handle, "RtlDllShutdownInProgress"));
if (!f) {
auto ret = FreeLibrary(handle);
assert(ret);
MAYBE_UNUSED(ret);
return false;
}
bool is_process_termination_in_progress = f();
auto ret = FreeLibrary(handle);
assert(ret);
MAYBE_UNUSED(ret);
if (is_process_termination_in_progress) {
return false;
} else {
// Three scenarios possible:
// 1. oneDNN is being dynamically unloaded
// 2. Another dynamic library that contains statically linked
// oneDNN is dynamically unloaded
// 3. oneDNN is statically linked in an executable which is done
// and now the process terminates In all these scenarios
// content of the cache can be safely destroyed.
//
// Note: the first 2 scenarios can still cause some issues in the
// case of OpenCL runtime. There doesn't seem to be a way to distinguish
// the 2 scenarios from the 3rd one therefore it's always
// considered unsafe to clean up the cache.
#if DNNL_GPU_RUNTIME == DNNL_RUNTIME_OCL
return false;
#endif
return true;
}
#else
// Always destroy the content of the cache for non-Windows OSes, and
// non-sycl and non-ocl runtimes because there is no a problem with
// library unloading order in such cases.
return true;
#endif
}
} // namespace impl
} // namespace dnnl
dnnl_status_t dnnl_set_jit_dump(int enabled) {
using namespace dnnl::impl;
jit_dump.set(enabled);
return status::success;
}
dnnl_status_t dnnl_set_jit_profiling_flags(unsigned flags) {
using namespace dnnl::impl;
#if DNNL_CPU_RUNTIME != DNNL_RUNTIME_NONE
unsigned mask = DNNL_JIT_PROFILE_VTUNE;
#ifdef __linux__
mask |= DNNL_JIT_PROFILE_LINUX_PERF;
mask |= DNNL_JIT_PROFILE_LINUX_JITDUMP_USE_TSC;
#endif
if (flags & ~mask) return status::invalid_arguments;
jit_profiling_flags.set(flags);
return status::success;
#else
return status::unimplemented;
#endif
}
dnnl_status_t dnnl_set_jit_profiling_jitdumpdir(const char *dir) {
auto status = dnnl::impl::status::unimplemented;
#if DNNL_CPU_RUNTIME != DNNL_RUNTIME_NONE
status = dnnl::impl::init_jit_profiling_jitdumpdir(dir, true);
#endif
return status;
}
dnnl_status_t dnnl_set_max_cpu_isa(dnnl_cpu_isa_t isa) {
auto status = dnnl::impl::status::runtime_error;
#if DNNL_CPU_RUNTIME != DNNL_RUNTIME_NONE
status = dnnl::impl::cpu::platform::set_max_cpu_isa(isa);
#endif
return status;
}
dnnl_cpu_isa_t dnnl_get_effective_cpu_isa() {
auto isa = dnnl_cpu_isa_default;
#if DNNL_CPU_RUNTIME != DNNL_RUNTIME_NONE
isa = dnnl::impl::cpu::platform::get_effective_cpu_isa();
#endif
return isa;
}
dnnl_status_t dnnl_set_cpu_isa_hints(dnnl_cpu_isa_hints_t isa_hints) {
auto status = dnnl::impl::status::runtime_error;
#if DNNL_CPU_RUNTIME != DNNL_RUNTIME_NONE
status = dnnl::impl::cpu::platform::set_cpu_isa_hints(isa_hints);
#endif
return status;
}
dnnl_cpu_isa_hints_t dnnl_get_cpu_isa_hints() {
auto isa_hint = dnnl_cpu_isa_no_hints;
#if DNNL_CPU_RUNTIME != DNNL_RUNTIME_NONE
isa_hint = dnnl::impl::cpu::platform::get_cpu_isa_hints();
#endif
return isa_hint;
}
#if DNNL_CPU_THREADING_RUNTIME == DNNL_RUNTIME_THREADPOOL
#include "oneapi/dnnl/dnnl_threadpool_iface.hpp"
namespace dnnl {
namespace impl {
namespace threadpool_utils {
namespace {
thread_local dnnl::threadpool_interop::threadpool_iface *active_threadpool
= nullptr;
}
void DNNL_API activate_threadpool(
dnnl::threadpool_interop::threadpool_iface *tp) {
// The assert here is put to prevent from activating a test threadpool while
// the library one was left activating(not deactivated)
assert(IMPLICATION(active_threadpool, active_threadpool == tp));
if (!active_threadpool) active_threadpool = tp;
}
void DNNL_API deactivate_threadpool() {
active_threadpool = nullptr;
}
dnnl::threadpool_interop::threadpool_iface *get_active_threadpool() {
return active_threadpool;
}
int &get_threadlocal_max_concurrency() {
thread_local int max_concurrency
= (int)cpu::platform::get_max_threads_to_use();
assert(max_concurrency > 0);
return max_concurrency;
}
int DNNL_API get_max_concurrency() {
return get_threadlocal_max_concurrency();
}
} // namespace threadpool_utils
} // namespace impl
} // namespace dnnl
#endif