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Kevin Boyd
2020-05-08 13:33:05 -07:00
commit fa4b8965d7
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[submodule "third_party/farmhash"]
path = third_party/farmhash
url = https://github.com/google/farmhash

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# Copyright 2020 Google LLC
#
# 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.
cmake_minimum_required (VERSION 3.2)
project (cpu_check VERSION 20181130 LANGUAGES C CXX)
# Options
# Use clang/llvm by default.
option(USE_CLANG "build with clang" ON)
# Build semi-statically by default.
option(BUILD_STATIC "build targets semi-statically linked" ON)
if (NOT CMAKE_BUILD_TYPE)
set(CMAKE_BUILD_TYPE Release)
endif(NOT CMAKE_BUILD_TYPE)
# Begin Google local change
# We use an in tree copy of boringSSL by default.
option(USE_BORINGSSL "build with boringSSL" OFF)
option(IN_GOOGLE3 "building in google3" OFF)
# The vendors subdirectories may not be present.
find_path(
VENDORS_AMD_PATH
NAMES amd.cc
PATHS ${CMAKE_CURRENT_SOURCE_DIR}/vendors/amd
NO_DEFAULT_PATH
)
find_path(
VENDORS_INTEL_PATH
NAMES intel.cc
PATHS ${CMAKE_CURRENT_SOURCE_DIR}/vendors/intel
NO_DEFAULT_PATH
)
# End Google local change
# Config header
configure_file (
"${PROJECT_SOURCE_DIR}/config.h.in"
"${PROJECT_BINARY_DIR}/config.h"
)
include_directories("${PROJECT_BINARY_DIR}")
if (USE_CLANG)
set(CMAKE_C_COMPILER clang)
set(CMAKE_CXX_COMPILER clang++)
set(CC clang)
set(CXX clang++)
endif(USE_CLANG)
set(CMAKE_C_FLAGS_DEBUG "-g -Wall -O0")
set(CMAKE_CXX_FLAGS_DEBUG "-g -Wall -O0")
set(CMAKE_C_FLAGS_RELEASE "-Wall -O2")
set(CMAKE_CXX_FLAGS_RELEASE "-Wall -O2")
set(CMAKE_C_STANDARD 11)
set(CMAKE_C_STANDARD_REQUIRED ON)
set(CMAKE_C_EXTENSIONS OFF) # we want c11 not gnu11
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF) # we want c++17 not gnu++17
add_executable(cpu_check cpu_check.cc)
add_executable(crc32c_test crc32c_test.cc)
add_library(farmhash third_party/farmhash/src/farmhash.cc)
add_library(crc32c crc32c.c)
add_library(fvt_controller fvt_controller.cc)
add_library(utils utils.cc)
# Begin Google local change
if (VENDORS_AMD_PATH)
add_library(amd ${VENDORS_AMD_PATH}/amd.cc)
add_library(hsmp ${VENDORS_AMD_PATH}/hsmp.cc)
target_link_libraries(amd hsmp pci)
set(VENDORS_LIBS ${VENDORS_LIBS} amd)
endif(VENDORS_AMD_PATH)
if (VENDORS_INTEL_PATH)
add_library(intel ${VENDORS_INTEL_PATH}/intel.cc)
set(VENDORS_LIBS ${VENDORS_LIBS} intel)
endif(VENDORS_INTEL_PATH)
# End Google local change
include(CheckCXXCompilerFlag)
check_cxx_compiler_flag("-march=sandybridge" ARCH_SANDYBRIDGE)
if(ARCH_SANDYBRIDGE)
target_compile_options(farmhash PUBLIC -march=sandybridge)
target_compile_options(crc32c PUBLIC -march=sandybridge)
endif(ARCH_SANDYBRIDGE)
target_link_libraries(cpu_check crc32c farmhash)
# Begin Google local change
target_link_libraries(cpu_check fvt_controller ${VENDORS_LIBS} utils)
# End Google local change
target_link_libraries(crc32c_test crc32c)
if (BUILD_STATIC)
set(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
endif(BUILD_STATIC)
# Needs pthreads
find_package(Threads REQUIRED)
target_link_libraries(cpu_check Threads::Threads)
# Needs zlib
find_package (ZLIB REQUIRED)
if(ZLIB_INCLUDE_DIRS)
include_directories(${ZLIB_INCLUDE_DIRS})
endif(ZLIB_INCLUDE_DIRS)
if(ZLIB_LIBRARIES)
target_link_libraries(cpu_check ${ZLIB_LIBRARIES})
endif(ZLIB_LIBRARIES)
# Begin Google local change
if(USE_BORINGSSL)
set(BORINGSSL_PATH ${CMAKE_CURRENT_SOURCE_DIR}/boringssl)
add_subdirectory(${BORINGSSL_PATH})
set(BORINGSSL_INCLUDE_DIRS ${BORINGSSL_PATH}/include)
include_directories("${BORINGSSL_PATH}/include")
target_link_libraries(cpu_check ssl crypto)
else(USE_BORINGSSL)
# End Google local change
# Needs OpenSSL
find_package (OpenSSL REQUIRED)
include_directories(${OPENSSL_INCLUDE_DIRS})
target_link_libraries(cpu_check ${OPENSSL_LIBRARIES})
# Static linking of OpenSSL may require -ldl, link it if found.
find_library (dl dl)
if(dl)
target_link_libraries(cpu_check dl)
endif(dl)
# Begin Google local change
endif(USE_BORINGSSL)
# End Google local change
install (TARGETS cpu_check DESTINATION bin)

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How to Contribute
Contributions are encouraged! Please read below for requirements.
## Contributor License Agreement
Contributions to this project must be accompanied by a Contributor License
Agreement. You (or your employer) retain the copyright to your contribution;
this simply gives us permission to use and redistribute your contributions as
part of the project. Head over to <https://cla.developers.google.com/> to see
your current agreements on file or to sign a new one.
You generally only need to submit a CLA once, so if you've already submitted one
(even if it was for a different project), you probably don't need to do it
again.
## Code reviews
All submissions, including submissions by project members, require review. We
use GitHub pull requests for this purpose. Consult
[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
information on using pull requests.

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Copyright 2018 Paul Ripke <stixpjr@gmail.com>
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.
-------------------------------------------------------------------------------
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# cpu_check
`NOTE:` BETA code, work-in-progress.
CPU torture test designed for SMP systems, attempting to find CPU hardware faults, focusing primarily on the x86_64 architecture.
The basic operation is to:
* Run threads with affinity fixed to each logical CPU.
* Generate a chunk of random data, either dictionary based text, or random binary data.
* Run a number of checksum/hash algorithms over the data, store their results.
* Compress the data via one of (zlib, ...).
* Encrypt the data via AES-256-GCM.
* Copy the data ('rep movsb' on x86, else memcpy).
* Switch affinity to an alternate logical CPU.
* Decrypt.
* Decompress.
* Run checksum/hash algorithms and compare with stored results.
Algorithms are chosen to exercise various hardware extensions. Eg. on x86_64, SSE4.2, AVX, etc.
## Prerequisites:
Designed to run under Unix/Linux OS.
* cmake: https://cmake.org/
* zlib
* OpenSSL/BoringSSL
## Building
```
sh$ git clone git@github.com:stixpjr/cpu_check.git
sh$ cd cpu_check
sh$ mkdir build
sh$ cd build
sh$ cmake ..
sh$ make
```
## Options
Some options have been implememented that affect the build, which may be passed
to cmake via, eg:
```cmake -DCMAKE_BUILD_TYPE=(Debug|Release)```
* CMAKE_BUILD_TYPE=(Release|Debug)
* USE_CLANG=(ON|OFF)
* BUILD_STATIC=(ON|OFF)
## TODO:
* Use git submodules for:
* farmhash: https://github.com/google/farmhash
* highwayhash: https://github.com/google/highwayhash
* crc32c: https://github.com/google/crc32c
* cityhash: https://github.com/google/cityhash
* brotli: https://github.com/google/brotli
* gipfeli: https://github.com/google/gipfeli
* Expand encryption coverage - find those algorithms that stress the HW.
* Flags to enable/disable steps, eg. encryption.
* Flags controlling min/max buffer size.
* Use cpuid to dynamically select appropriate instruction set extensions.
* Query ACPI/cpuid for more meaningful CPU identification.
* Extra x86_64 instruction coverage:
* movnti (SSE2 mov doubleword with non-temporal hint)
* prefetch*
* movbe (mov with byte swap)
* Consider floating point tests?
* Keep stats on corruptions (eg. buffer lengths/alignments, detection means (crc32), etc).
* Try to narrow down corruptions automatically.

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#define cpu_check_VERSION "@cpu_check_VERSION@"
// Begin Google local change
#cmakedefine IN_GOOGLE3
#cmakedefine USE_BORINGSSL
#cmakedefine VENDORS_AMD_PATH
#cmakedefine VENDORS_INTEL_PATH
// End Google local change

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// Copyright 2020 Google LLC
//
// 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.
// Analyzes cpu_check failure tids to produce list of condemned
// cores. Usually there's just one defective core.
//
// One way to extract tids from logs is extract_tids.sh.
// Pipe its output to this program.
//
// By default, this code assumes 28 core dual socket machines.
#include <algorithm>
#include <cstdio>
#include <sstream>
#include <string>
#include <vector>
#include "log.h"
class BadCore {
public:
BadCore(int sockets, int cores_per_socket)
: sockets_(sockets), cores_per_socket_(cores_per_socket) {}
// Condemns thread 'tid'.
void Condemn(int tid) {
std::vector<int> c({TidToCanonicalCore(tid)});
accused_.push_back(c);
}
// Condemns one of 'tid_1' and 'tid_2'.
void Accuse(int tid_1, int tid_2) {
std::vector<int> c({TidToCanonicalCore(tid_1), TidToCanonicalCore(tid_2)});
accused_.push_back(c);
}
// Greedy condemnation.
void Condemn() {
while (!accused_.empty()) {
CondemnWorst();
}
}
// Returns string naming the condemned cores.
std::string Condemnations() const {
if (condemned_.empty()) {
return "None";
}
std::stringstream s;
if (ambiguous_) {
s << "AMBIGUOUS ";
}
for (auto &c : condemned_) {
s << CanonicalCoreToString(c.first) << " (" << c.second << ") ";
}
return s.str();
}
// Returns true if tid within legitimate range.
bool Plausible(int tid) const {
return (tid >= 0) && (tid < (2 * sockets_ * cores_per_socket_));
}
private:
// Condemns worst offender.
void CondemnWorst() {
int worst = -1;
int worst_k = -1;
bool ambiguous = false;
for (int c = 0; c < sockets_ * cores_per_socket_; c++) {
const int k = AccusationCount(c);
if (k == 0) continue;
if (k > worst_k) {
worst = c;
worst_k = k;
ambiguous = false;
} else {
if (k == worst_k) {
ambiguous = true;
}
}
}
ambiguous_ |= ambiguous;
condemned_.push_back({worst, worst_k});
Dispose(worst);
}
// Returns number of accusations against 'canonical_core'.
int AccusationCount(int canonical_core) const {
int k = 0;
for (auto &v : accused_) {
if (std::find(v.begin(), v.end(), canonical_core) != v.end()) {
k++;
}
}
return k;
}
// Delete accusations that include 'canonical_core'.
void Dispose(int canonical_core) {
std::vector<std::vector<int>> temp;
for (auto &v : accused_) {
if (std::find(v.begin(), v.end(), canonical_core) == v.end()) {
temp.push_back(v);
}
}
accused_ = temp;
}
int TidToCanonicalCore(int tid) const {
return tid % (sockets_ * cores_per_socket_);
}
std::string CanonicalCoreToString(int canonical_core) const {
const int socket = canonical_core / cores_per_socket_;
const int a = canonical_core;
const int b = canonical_core + sockets_ * cores_per_socket_;
std::stringstream s;
s << "CPU" << socket << " HT" << a << "-" << b;
return s.str();
}
const int sockets_;
const int cores_per_socket_;
std::vector<std::vector<int>> accused_;
std::vector<std::pair<int, int>> condemned_;
bool ambiguous_ = false;
};
static void UsageIf(bool v) {
if (!v) return;
LOG(ERROR) << "Usage corrupt_cores [-c cores_per_socket] [-s sockets]";
exit(2);
}
int main(int argc, char **argv) {
int sockets = 2; // Default: dual socket
int cores_per_socket = 28; // Default: C28
for (int i = 1; i < argc; i++) {
const char *flag = argv[i];
UsageIf(flag[0] != '-');
for (flag++; *flag != 0; flag++) {
switch (*flag) {
case 'c': {
std::string c(++flag);
flag += c.length();
std::stringstream s(c);
UsageIf((s >> cores_per_socket).fail());
break;
}
case 's': {
std::string c(++flag);
flag += c.length();
std::stringstream s(c);
UsageIf((s >> sockets).fail());
break;
}
default:
UsageIf(true);
}
if (*flag == 0) break;
}
}
std::string line;
BadCore bad(sockets, cores_per_socket);
while (std::getline(std::cin, line)) {
std::istringstream ss(line);
int a = 9999;
if ((ss >> a).fail() || !bad.Plausible(a)) {
LOG(ERROR) << "Bad input: '" << line << "'";
continue;
}
while (ss.peek() == ' ') ss.ignore();
if (ss.eof()) {
bad.Condemn(a);
} else {
int b = 9999;
if ((ss >> b).fail() || !bad.Plausible(b)) {
LOG(ERROR) << "Bad input: '" << line << "'";
continue;
}
bad.Accuse(a, b);
}
}
bad.Condemn();
printf("Condemned %s\n", bad.Condemnations().c_str());
}

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// Copyright 2020 Google LLC
//
// 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.
#include "crc32c.h"
#ifdef __SSE4_2__
#include <x86intrin.h>
/* x86 version based using instrinsics */
uint32_t crc32c_hw(const char *src, size_t len) {
const unsigned char *s = (unsigned char *)src;
uint64_t hh = ~0;
#ifdef __x86_64__
while (len > 7) {
uint64_t v = *(uint64_t *)s;
hh = _mm_crc32_u64(hh, v);
s += 8;
len -= 8;
}
#endif /* __x86_64__ */
uint32_t h = (uint32_t)hh;
if (len > 3) {
uint32_t v = *(uint32_t *)s;
h = _mm_crc32_u32(h, v);
s += 4;
len -= 4;
}
if (len > 1) {
uint16_t v = *(uint16_t *)s;
h = _mm_crc32_u16(h, v);
s += 2;
len -= 2;
}
if (len > 0) {
uint8_t v = *(uint8_t *)s;
h = _mm_crc32_u8(h, v);
s += 1;
len -= 1;
}
return ~h;
}
#endif /* __SSE4_2__ */
/* CRC-32C (iSCSI) polynomial in reversed bit order. */
#define POLY 0x82f63b78
uint32_t crc32c_sw(const char *src, size_t len) {
const unsigned char *s = (unsigned char *)src;
uint32_t h = ~0;
while (len--) {
h ^= *s++;
for (int k = 0; k < 8; k++) h = h & 1 ? (h >> 1) ^ POLY : h >> 1;
}
return ~h;
}
uint32_t crc32c(const char *src, size_t len) {
#ifdef __SSE4_2__
return crc32c_hw(src, len);
#else
return crc32c_sw(src, len);
#endif
}

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// Copyright 2020 Google LLC
//
// 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.
#include <stdint.h>
#include <stdlib.h>
#ifdef __cplusplus
extern "C" {
#endif
uint32_t crc32c(const char *s, size_t len);
#ifdef __cplusplus
}
#endif

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// Copyright 2020 Google LLC
//
// 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.
#include <string.h>
#include <iostream>
#include <random>
#include "crc32c.h"
extern "C" {
uint32_t crc32c_hw(const char *, size_t);
uint32_t crc32c_sw(const char *, size_t);
}
const int MINSIZE = 1;
const int MAXSIZE = 1048576;
int main(int argc, char **argv) {
#if defined(__x86_64__) || defined(__i386__)
std::knuth_b rndeng((std::random_device()()));
std::uniform_int_distribution<int> size_dist(MINSIZE, MAXSIZE);
std::uniform_int_distribution<int> d_dist(0, 255);
std::string buf;
for (int i = 0; i < 100; i++) {
size_t len = size_dist(rndeng);
buf.resize(len);
for (size_t j = 0; j < len; j++) {
buf[j] = d_dist(rndeng);
}
uint32_t crc_hw = crc32c_hw(buf.data(), len);
uint32_t crc_sw = crc32c_sw(buf.data(), len);
if (crc_hw != crc_sw) {
fprintf(stderr, "crc mismatch: hw 0x%08x vs sw 0x%08x buffer len %ld\n",
crc_hw, crc_sw, len);
}
buf.clear();
}
#endif // defined(__x86_64__) || defined(__i386__)
return 0;
}

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// Copyright 2020 Google LLC
//
// 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.
#include "config.h"
#include "fvt_controller.h"
#include <error.h>
#include <fcntl.h>
#include <math.h>
#include <stdint.h>
#include <atomic>
#undef NDEBUG
#include <cassert>
#include <cstring>
#include <memory>
#include <mutex>
#include "fvt_controller.h"
#include "log.h"
namespace {
class NonX86FVTController : public FVTController {
public:
explicit NonX86FVTController(int cpu) : FVTController(cpu) {}
~NonX86FVTController() override {}
void SetCurrentFreqLimitMhz(int mhz) override {
LOG(FATAL) << "Unsupported platform";
}
// Returns the maximum supported CPU frequency.
int GetAbsoluteFreqLimitMhz() override {
LOG(FATAL) << "Unsupported platform";
return 0;
}
// Returns true if automatic Power Management enabled.
bool PowerManaged() const override {
LOG(FATAL) << "Unsupported platform";
return false;
}
std::string FVT() override {
LOG(FATAL) << "Unsupported platform";
return "";
}
std::string InterestingEnables() const override {
LOG(FATAL) << "Unsupported platform";
return "";
}
void ControlFastStringOps(bool enable) override {
LOG(FATAL) << "Unsupported platform";
}
protected:
int GetCurrentFreqLimitMhz() override {
LOG(FATAL) << "Unsupported platform";
return 0;
}
int GetCurrentFreqMhz() override {
LOG(FATAL) << "Unsupported platform";
return 0;
}
};
static const char IntelVendorString[] = "GenuineIntel";
static const char AMDVendorString[] = "AuthenticAMD";
} // namespace
// Only works for Linux on x86-64
void X86FVTController::GetCPUId(int cpu, uint32_t eax, CPUIDResult* result) {
constexpr size_t kCPUIDPathMax = 1024;
char CPUIDPath[kCPUIDPathMax];
snprintf(CPUIDPath, sizeof(CPUIDPath), "/dev/cpu/%d/cpuid", cpu);
int fd = open(CPUIDPath, O_RDONLY);
assert(fd >= 0);
ssize_t byte_read = pread(fd, result, sizeof(*result), eax);
if (byte_read != sizeof(*result)) {
LOG(FATAL) << "CPUID " << std::hex << eax << "failed.";
}
close(fd);
}
std::string X86FVTController::CPUIDVendorStringUncached() {
char buffer[12];
CPUIDResult result;
GetCPUId(0, 0, &result);
memcpy(buffer + 0, &result.ebx, 4);
memcpy(buffer + 4, &result.edx, 4);
memcpy(buffer + 8, &result.ecx, 4);
return std::string(buffer, sizeof(buffer));
}
std::string X86FVTController::CPUIDVendorString() {
static const std::string vendor_string = CPUIDVendorStringUncached();
return vendor_string;
}
std::unique_ptr<FVTController> FVTController::Create(int cpu) {
#if defined(__i386__) || defined(__x86_64__)
const std::string vendor_string = X86FVTController::CPUIDVendorString();
#ifdef VENDORS_INTEL_PATH
if (vendor_string == IntelVendorString) {
return NewIntelFVTController(cpu);
}
#endif
#ifdef VENDORS_AMD_PATH
if (vendor_string == AMDVendorString) {
return NewAMDFVTController(cpu);
}
#endif
LOG(FATAL) << "Unsupported x86 vendor";
return nullptr;
#else
return std::unique_ptr<FVTController>(new NonX86FVTController(cpu));
#endif
}

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// Copyright 2020 Google LLC
//
// 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.
#ifndef FVT_CONTROLLER_
#define FVT_CONTROLLER_
#include <fcntl.h>
#include <unistd.h>
#include <memory>
#include <sstream>
#include "log.h"
#include "utils.h"
// Frequency, Voltage and Thermal (FVT) controller.
class FVTController {
public:
static constexpr int kMinTurboMHz = 1000;
protected:
explicit FVTController(int cpu) : cpu_(cpu) {
ResetFrequencyMeter();
}
public:
virtual ~FVTController() {}
static std::unique_ptr<FVTController> Create(int cpu);
// Monitor per-cpu (or core) frequency control.
void MonitorFrequency() {
const double t = TimeInSeconds();
const int f = GetCurrentFreqMhz();
sum_mHz_ += (t - previous_sample_time_) * f;
previous_sample_time_ = t;
const int mHz = GetCurrentFreqLimitMhz();
if (mHz != max_mHz_) {
LOG_EVERY_N_SECS(INFO, 10) << "Cpu: " << cpu_
<< " max turbo frequency control changed to: " << mHz;
max_mHz_ = mHz;
}
}
// Set the current CPU frequency limit. Warning: do this to both threads of
// HT pair. Requires 'mhz' multiple of 100, within legitimate range.
virtual void SetCurrentFreqLimitMhz(int mhz) = 0;
// Returns the absolute maximum CPU frequency.
virtual int GetAbsoluteFreqLimitMhz() = 0;
// Dont put much stock in this method, it's probably a lousy way to do things.
int GetMeanFreqMhz() const {
return sum_mHz_ / (previous_sample_time_ - t0_);
}
int max_mHz() const { return max_mHz_; }
int limit_mHz() const { return limit_mhz_; }
// Returns true if automatic Power Management enabled.
virtual bool PowerManaged() const = 0;
// Returns frequency, thermal, and voltage condition.
virtual std::string FVT() = 0;
virtual std::string InterestingEnables() const = 0;
// TODO: separate this from FVT controller.
virtual void ControlFastStringOps(bool enable) = 0;
protected:
// Returns the current CPU frequency limit in MHz.
virtual int GetCurrentFreqLimitMhz() = 0;
// Returns the current CPU frequency in MHz.
virtual int GetCurrentFreqMhz() = 0;
void ResetFrequencyMeter() {
t0_ = TimeInSeconds();
previous_sample_time_ = t0_;
sum_mHz_ = 0.0;
}
const int cpu_;
double t0_ = 0.0;
int limit_mhz_ = 0; // const after init
int max_mHz_ = 0;
double sum_mHz_ = 0.0;
double previous_sample_time_ = 0.0;
};
class X86FVTController : public FVTController {
public:
struct CPUIDResult {
uint32_t eax;
uint32_t ebx;
uint32_t ecx;
uint32_t edx;
};
explicit X86FVTController(int cpu) : FVTController(cpu) {
std::stringstream dev;
dev << "/dev/cpu/" << cpu << "/msr";
fd_ = open(dev.str().c_str(), O_RDWR);
if (fd_ < 0) {
LOG(ERROR) << "Cannot open: " << dev.str()
<< " Running me as root?";
}
}
~X86FVTController() override {
if (fd_ >= 0) close(fd_);
}
// Only works for Linux on x86-64
static void GetCPUId(int cpu, uint32_t eax, CPUIDResult* result);
// Return the vendor string from CPUID
static std::string CPUIDVendorString();
protected:
uint64_t ReadMsr(uint32_t reg) const {
if (fd_ < 0) return 0;
uint64_t v = 0;
int rc = pread(fd_, &v, sizeof(v), reg);
if (rc != sizeof(v)) {
LOG_EVERY_N_SECS(ERROR, 60) << "Unable to read cpu: " << cpu_
<< " reg: " << std::hex << reg;
}
return v;
}
void WriteMsr(uint32_t reg, uint64_t v) const {
if (fd_ < 0) return;
int rc = pwrite(fd_, &v, sizeof(v), reg);
if (rc != sizeof(v)) {
fprintf(stderr, "rc = %d sizeof(v) = %lu\n", rc, sizeof(v));
LOG_EVERY_N_SECS(ERROR, 60) << "Unable to write cpu: " << cpu_
<< " reg: " << std::hex << reg;
}
}
private:
static std::string CPUIDVendorStringUncached();
int fd_ = -1;
};
extern std::unique_ptr<FVTController> NewAMDFVTController(int cpu);
extern std::unique_ptr<FVTController> NewIntelFVTController(int cpu);
#endif // FVT_CONTROLLER_

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// Copyright 2020 Google LLC
//
// 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.
#ifndef LOG_H_
#define LOG_H_
#include <sys/time.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <atomic>
#include <iostream>
#include <sstream>
#include <string>
enum LOG_LEVEL {
DEBUG,
INFO,
WARN,
ERROR,
FATAL,
};
// TODO - Flag to filter above a given log level
// TODO
// Make this more efficient. Eg. use:
// LOG_IF_COND(xx) << yy;
// becomes
// for (condvar;COND;) Log(blah).stream() << yy;
#define LOG(X) Log(__FILE__, __LINE__, X).stream()
#define LOG_EVERY_N(X, N) \
static std::atomic<uint64_t> __FILE__##__LINE__##_counter(0); \
Log(__FILE__, __LINE__, X, __FILE__##__LINE__##_counter, N).stream()
#define LOG_EVERY_N_SECS(X, N) \
static std::atomic<int64_t> __FILE__##__LINE__##_lasttime(0); \
Log(__FILE__, __LINE__, X, __FILE__##__LINE__##_lasttime, N).stream()
// TODO
// #define VLOG(x)
static LOG_LEVEL min_log_level = INFO;
class Log {
public:
Log(const char* file, int line, LOG_LEVEL lvl) : lvl_(lvl) {
if (lvl < min_log_level) {
skip_ = true;
return;
}
Init(file, line);
}
// For LOG_EVERY_N:
Log(const char* file, int line, LOG_LEVEL lvl, std::atomic<uint64_t>& cnt,
int N)
: lvl_(lvl) {
if (lvl < min_log_level) {
skip_ = true;
return;
}
if ((++cnt % N) != 0) {
skip_ = true;
return;
}
Init(file, line);
}
// For LOG_EVERY_N_SECS:
Log(const char* file, int line, LOG_LEVEL lvl, std::atomic<int64_t>& t, int N)
: lvl_(lvl) {
if (lvl < min_log_level) {
skip_ = true;
return;
}
int64_t now = time(nullptr);
int64_t last = t;
if (now - last < N || !t.compare_exchange_strong(last, now)) {
skip_ = true;
return;
}
Init(file, line);
}
~Log() {
if (skip_) return;
// You might prefer to direct errors to stderr, e.g.
// (lvl_ < WARN ? std::cout : std::cerr) << os_.str();
std::cout << os_.str() << std::endl;
if (lvl_ == FATAL) {
abort();
}
}
std::ostream& stream() { return os_; }
std::ostream& operator<<(const std::string& s) {
if (skip_) return os_;
return os_ << s;
}
private:
void Init(const char* file, int line) {
static const char l[] = {
'D', 'I', 'W', 'E', 'F',
};
struct timeval tvs;
struct tm tms;
time_t t;
char s[17];
gettimeofday(&tvs, nullptr);
t = tvs.tv_sec;
gmtime_r(&t, &tms);
strftime(s, sizeof(s), "%Y%m%d-%H%M%S.", &tms);
char us[7];
snprintf(us, sizeof(us), "%06ld", (long)tvs.tv_usec);
os_ << l[lvl_] << s << us << ' ' << pthread_self() << " " << file << ':'
<< line << "] ";
}
LOG_LEVEL lvl_;
bool skip_ = false;
std::stringstream os_;
};
#endif // LOG_H_

1
third_party/farmhash vendored Submodule

Submodule third_party/farmhash added at 0d859a8118

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// Copyright 2020 Google LLC
//
// 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.
#include "utils.h"
#include <sys/time.h>
#include <unistd.h>
#include "log.h"
static const std::string host_name = []() {
char host[256];
gethostname(host, sizeof(host));
const std::string h(host);
size_t k = h.find('.');
if (k == std::string::npos) return h;
return h.substr(0, k);
}();
double TimeInSeconds() {
struct timeval tv;
gettimeofday(&tv, nullptr);
return ((tv.tv_sec * 1e6) + tv.tv_usec) / 1e6;
}
std::string Json(const std::string& field, int v) {
return "\"" + field + "\": " + std::to_string(v);
}
std::string Json(const std::string& field, uint64_t v) {
return "\"" + field + "\": " + std::to_string(v);
}
std::string Json(const std::string& field, double v) {
return "\"" + field + "\": " + std::to_string(v);
}
std::string JsonBool(const std::string& field, bool v) {
return "\"" + field + "\": " + (v ? "true" : "false");
}
std::string Json(const std::string& field, const std::string& v) {
return "\"" + field + "\": \"" + v + "\"";
}
std::string JsonRecord(const std::string& name, const std::string& v) {
return "\"" + name + "\": { " + v + " }";
}
// Emits null field.
std::string JsonNull(const std::string& field) {
return "\"" + field + "\": null";
}
// Returns host and timestamp fields. ToDo: probably add a run id.
std::string JTag() {
const uint64_t t = TimeInSeconds() * 1e6;
return Json("host", host_name) + ", " + Json("t_us", t);
}
// Emits a run status record.
std::string Jstat(const std::string& v) {
return "{ " + JsonRecord("stat", v) + ", " + JTag() + " }";
}

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// Copyright 2020 Google LLC
//
// 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.
#ifndef UTILS_H_
#define UTILS_H_
#include <string>
double TimeInSeconds();
std::string Json(const std::string& field, int v);
std::string Json(const std::string& field, uint64_t v);
std::string Json(const std::string& field, double v);
std::string JsonBool(const std::string& field, bool v);
std::string Json(const std::string& field, const std::string& v);
std::string JsonRecord(const std::string& name, const std::string& v);
// Emits null field.
std::string JsonNull(const std::string& field);
// Returns host and timestamp fields. ToDo: probably add a run id.
std::string JTag();
// Emits a run status record.
std::string Jstat(const std::string& v);
#endif // UTILS_H_

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// Copyright 2020 Google LLC
//
// 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.
// Intel platform specific code
#include <atomic>
#include <cassert>
#include <memory>
#include "../../fvt_controller.h"
#include "../../log.h"
namespace {
class IntelFVTController : public X86FVTController {
public:
explicit IntelFVTController(int cpu)
: X86FVTController(cpu) {
limit_mhz_ = GetAbsoluteFreqLimitMhzImpl();
// Set initial Turbo frequency to max.
SetCurrentMaxFreqMhzImpl(limit_mhz_);
}
~IntelFVTController() override {
// Upon exit, set Turbo frequency to max.
SetCurrentMaxFreqMhzImpl(limit_mhz_);
}
// Sets current maximum frequency. Warning: do this to both threads of HT
// pair. Requires 'mhz' multiple of 100, within legitimate range.
void SetCurrentFreqLimitMhz(int mhz) override {
SetCurrentMaxFreqMhzImpl(mhz);
}
// Returns absolute maximum CPU frequency.
int GetAbsoluteFreqLimitMhz() override {
return GetAbsoluteFreqLimitMhzImpl();
}
// Returns true if automatic Power Management enabled.
bool PowerManaged() const override {
return ReadMsr(k_IA32_PM_ENABLE) & 0x1;
}
// Returns frequency, thermal, and voltage condition.
std::string FVT() override {
constexpr double kVoltageScale = 1.0 / (1 << 13);
const uint64_t v = ReadMsr(k_IA32_THERM_STATUS);
const bool valid = (v >> 31) & 0x1;
const int c = valid ? (v >> 16) & 0x7f : 0;
const bool current_limit = (v >> 12) & 0x1;
const bool power_limit = (v >> 10) & 0x1;
const bool critical = (v >> 4) & 0x1;
const bool proc_hot = v & 0x1; // AKA "Thermal Status"
const uint64_t p = ReadMsr(k_IA32_PERF_STATUS);
const double voltage = ((p >> 32) & 0xffff) * kVoltageScale;
const int f = GetCurrentFreqMhz();
std::stringstream s;
s << (critical ? "Critical " : "")
<< (proc_hot ? "ProcIsHot " : "")
<< (current_limit ? "CurrentLimit " : "")
<< (power_limit ? "PowerLimit " : "");
return Json("f", f) + ", " + Json("voltage", voltage) + ", " +
Json("margin", c) +
(s.str().empty() ? "" : ", " + Json("pow_states", s.str()));
}
std::string InterestingEnables() const override {
const uint64_t v = ReadMsr(k_IA32_MISC_ENABLE);
const bool fast_strings = v & 0x1;
const bool auto_thermal_control = (v >> 3) & 0x1;
const bool pm = PowerManaged();
std::stringstream s;
s << (fast_strings ? "FastStrings " : "")
<< (auto_thermal_control ? "AutoThermalControl " : "")
<< (pm ? "PowerManagement" : "");
return s.str();
}
// TODO: separate this from FVT controller.
void ControlFastStringOps(bool enable) override {
uint64_t v = ReadMsr(k_IA32_MISC_ENABLE);
v = (v & ~0x1) | (enable & 0x1);
WriteMsr(k_IA32_MISC_ENABLE, v);
}
private:
static constexpr int k_SEND_COMMAND = 0x150;
static constexpr int k_IA32_PERF_STATUS = 0x198;
static constexpr int k_IA32_PERF_CTL = 0x199;
static constexpr int k_IA32_THERM_STATUS = 0x19c;
static constexpr int k_IA32_MISC_ENABLE = 0x1a0;
static constexpr int k_MSR_TURBO_RATIO_LIMIT = 0x1ad;
static constexpr int k_IA32_PM_ENABLE = 0x770;
// Returns the current CPU frequency limit. This is not virtual so that we
// can call this from constructor and destructor safely.
int GetCurrentFreqLimitMhzImpl() {
uint64_t v = ReadMsr(k_IA32_PERF_CTL);
return ((v >> 8) & 0xff) * 100;
}
int GetCurrentFreqLimitMhz() override {
return GetCurrentFreqLimitMhzImpl();
}
int GetCurrentFreqMhz() override {
uint64_t v = ReadMsr(k_IA32_PERF_STATUS);
return ((v >> 8) & 0xff) * 100;
}
// This sets the current maximum CPU frequency. This is not virtual so that we
// can call this from constructor and destructor safely.
void SetCurrentMaxFreqMhzImpl(int mhz) {
if (mhz == max_mHz_) return;
if (PowerManaged()) {
LOG_EVERY_N_SECS(ERROR, 10) << "Cpu: " << cpu_
<< "Cannot set turbo freq while Power Management enabled!";
}
ResetFrequencyMeter();
int hundreds = mhz / 100;
assert(100 * hundreds == mhz);
assert(mhz >= kMinTurboMHz);
assert(mhz <= limit_mhz_);
uint64_t v = hundreds << 8;
WriteMsr(k_IA32_PERF_CTL, v);
max_mHz_ = mhz;
LOG_EVERY_N_SECS(INFO, 15) << "Set cpu: " << cpu_
<< " max turbo freq to: " << mhz << " MHz";
}
// Returns the absolute maximum frequency.
int GetAbsoluteFreqLimitMhzImpl() {
uint64_t v = ReadMsr(k_MSR_TURBO_RATIO_LIMIT);
return (v & 0xff) * 100;
}
};
} // namespace
std::unique_ptr<FVTController> NewIntelFVTController(int cpu) {
return std::unique_ptr<FVTController> (new IntelFVTController(cpu));
}