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#include <string.h>
#include <errno.h>
#include <time.h>
#include <algorithm>
#include <boost/algorithm/string.hpp>
#include "misc_log_ex.h"
#include "timings.h"
#define N_EXPECTED_FIELDS (8+11)
TimingsDatabase::TimingsDatabase()
{
}
TimingsDatabase::TimingsDatabase(const std::string &filename, const bool load_previous /*=false*/):
filename(filename)
{
if (load_previous)
load();
}
TimingsDatabase::~TimingsDatabase()
{
save();
}
bool TimingsDatabase::load()
{
instances.clear();
if (filename.empty())
return true;
FILE *f = fopen(filename.c_str(), "r");
if (!f)
{
MDEBUG("Failed to load timings file " << filename << ": " << strerror(errno));
return false;
}
while (1)
{
char s[4096];
if (!fgets(s, sizeof(s), f))
break;
char *tab = strchr(s, '\t');
if (!tab)
{
MWARNING("Bad format: no tab found");
continue;
}
const std::string name = std::string(s, tab - s);
std::vector<std::string> fields;
char *ptr = tab + 1;
boost::split(fields, ptr, boost::is_any_of(" "));
if (fields.size() != N_EXPECTED_FIELDS)
{
MERROR("Bad format: wrong number of fields: got " << fields.size() << " expected " << N_EXPECTED_FIELDS);
continue;
}
instance i;
unsigned int idx = 0;
i.t = atoi(fields[idx++].c_str());
i.npoints = atoi(fields[idx++].c_str());
i.min = atof(fields[idx++].c_str());
i.max = atof(fields[idx++].c_str());
i.mean = atof(fields[idx++].c_str());
i.median = atof(fields[idx++].c_str());
i.stddev = atof(fields[idx++].c_str());
i.npskew = atof(fields[idx++].c_str());
i.deciles.reserve(11);
for (int n = 0; n < 11; ++n)
{
i.deciles.push_back(atoi(fields[idx++].c_str()));
}
instances.emplace_back(name, i);
}
fclose(f);
return true;
}
bool TimingsDatabase::save(const bool save_current_time /*=true*/)
{
if (filename.empty() || instances.empty())
return true;
FILE *f = fopen(filename.c_str(), "a"); // append
if (!f)
{
MERROR("Failed to write to file " << filename << ": " << strerror(errno));
return false;
}
if (save_current_time)
{
// save current time in readable format (UTC)
std::time_t sys_time{std::time(nullptr)};
std::tm *utc_time = std::gmtime(&sys_time); //GMT is equivalent to UTC
// format: year-month-day : hour:minute:second
std::string current_time{};
if (utc_time && sys_time != (std::time_t)(-1))
{
char timeString[22]; //length = std::size("yyyy-mm-dd : hh:mm:ss") (constexpr std::size is C++17)
std::strftime(timeString, 22, "%F : %T", utc_time);
current_time += timeString;
}
else
{
current_time += "TIME_ERROR_";
}
fputc('\n', f); // add an extra line before each 'print time'
fprintf(f, "%s", current_time.c_str());
fputc('\n', f);
}
for (const auto &i: instances)
{
fprintf(f, "%s,", i.first.c_str());
if (i.second.npoints > 0)
{
fprintf(f, "%lu,", (unsigned long)i.second.t);
fprintf(f, "%zu,", i.second.npoints);
fprintf(f, "%f,", i.second.min);
fprintf(f, "%f,", i.second.max);
fprintf(f, "%f,", i.second.mean);
fprintf(f, "%f,", i.second.median);
fprintf(f, "%f,", i.second.stddev);
fprintf(f, "%f,", i.second.npskew);
for (uint64_t v: i.second.deciles)
fprintf(f, "%lu,", (unsigned long)v);
// note: only add a new line if there are points; assume that 'no points' means i.first is a message meant to be
// prepended to the next save operation
fputc('\n', f);
}
}
fclose(f);
// after saving, clear so next save does not append the same stuff over again
instances.clear();
return true;
}
const TimingsDatabase::instance* TimingsDatabase::get_most_recent(const char *name) const
{
time_t latest_time = 0;
const TimingsDatabase::instance *instance_ptr = nullptr;
for (const auto &i: instances)
{
if (i.first != name)
continue;
if (i.second.t < latest_time)
continue;
latest_time = i.second.t;
instance_ptr = &i.second;
}
return instance_ptr;
}
void TimingsDatabase::add(const char *name, const instance &i)
{
instances.emplace_back(name, i);
}
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