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Codechange: Replace C-style TICC/TOCC macros with C++ RAII implementation. (#11857)

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Usage is more robust, and will always include timing when the TicToc object goes out of scope.
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Peter Nelson 2024-01-21 18:38:40 +00:00 committed by GitHub
parent 691c628b07
commit c7d5cedc7b
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1 changed files with 29 additions and 35 deletions
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64
src/debug.h
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@ -63,44 +63,38 @@ std::string GetDebugString();
/* Shorter form for passing filename and linenumber */
#define FILE_LINE __FILE__, __LINE__
/**
* Used for profiling.
*
/** TicToc profiling.
* Usage:
* TIC();
* --Do your code--
* TOC("A name", 1);
*
* When you run the TIC() / TOC() multiple times, you can increase the '1'
* to only display average stats every N values. Some things to know:
*
* for (int i = 0; i < 5; i++) {
* TIC();
* --Do your code--
* TOC("A name", 5);
* }
*
* Is the correct usage for multiple TIC() / TOC() calls.
*
* TIC() / TOC() creates its own block, so make sure not the mangle
* it with another block.
*
* The output is counted in microseconds. Mainly useful for local optimisations.
**/
#define TIC() {\
auto _start_ = std::chrono::high_resolution_clock::now();\
static uint64_t _sum_ = 0;\
static uint32_t _i_ = 0;
* static TicToc::State state("A name", 1);
* TicToc tt(state);
* --Do your code--
*/
struct TicToc {
/** Persistent state for TicToc profiling. */
struct State {
const std::string_view name;
const uint32_t max_count;
uint32_t count = 0;
uint64_t chrono_sum = 0;
#define TOC(str, _count_)\
_sum_ += (std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::high_resolution_clock::now() - _start_)).count();\
if (++_i_ == _count_) {\
Debug(misc, 0, "[{}] {} us [avg: {:.1f} us]", str, _sum_, _sum_/(double)_i_);\
_i_ = 0;\
_sum_ = 0;\
}\
}
constexpr State(std::string_view name, uint32_t max_count) : name(name), max_count(max_count) { }
};
State &state;
std::chrono::high_resolution_clock::time_point chrono_start; ///< real time count.
inline TicToc(State &state) : state(state), chrono_start(std::chrono::high_resolution_clock::now()) { }
inline ~TicToc()
{
this->state.chrono_sum += (std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::high_resolution_clock::now() - this->chrono_start)).count();
if (++this->state.count == this->state.max_count) {
Debug(misc, 0, "[{}] {} us [avg: {:.1f} us]", this->state.name, this->state.chrono_sum, this->state.chrono_sum / static_cast<double>(this->state.count));
this->state.count = 0;
this->state.chrono_sum = 0;
}
}
};
void ShowInfoI(const std::string &str);
#define ShowInfo(format_string, ...) ShowInfoI(fmt::format(FMT_STRING(format_string), ## __VA_ARGS__))