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#include <algorithm>
#include <cmath>
#include <iostream>
#include <string>
#include <numeric>
#include <regex>
#include <system_error>
#include <boost/process.hpp>
#include <boost/tokenizer.hpp>
namespace bp = boost::process;
using namespace std;
int main(int argc, char** argv)
{
cout << "Mon Memory Target Test" << endl;
if (argc != 2) {
cout << "Syntax: "
<< "ceph_test_mon_memory_target <mon-memory-target-bytes>"
<< endl;
exit(EINVAL);
}
string target_directory("/var/log/ceph/");
unsigned long maxallowed = stoul(argv[1], nullptr, 10);
regex reg(R"(cache_size:(\d*)\s)");
string grep_command("grep _set_new_cache_sizes " + target_directory
+ "ceph-mon.a.log");
bp::ipstream is;
error_code ec;
bp::child grep(grep_command, bp::std_out > is, ec);
if (ec) {
cout << "Error grepping logs! Exiting" << endl;
cout << "Error: " << ec.value() << " " << ec.message() << endl;
exit(ec.value());
}
string line;
vector<unsigned long> results;
while (grep.running() && getline(is, line) && !line.empty()) {
smatch match;
if (regex_search(line, match, reg)) {
results.push_back(stoul(match[1].str()));
}
}
if (results.empty()) {
cout << "Error: No grep results found!" << endl;
exit(ENOENT);
}
auto maxe = *(max_element(results.begin(), results.end()));
cout << "Results for mon_memory_target:" << endl;
cout << "Max: " << maxe << endl;
cout << "Min: " << *(min_element(results.begin(), results.end())) << endl;
auto sum = accumulate(results.begin(), results.end(),
static_cast<unsigned long long>(0));
auto mean = sum / results.size();
cout << "Mean average: " << mean << endl;
vector<unsigned long> diff(results.size());
transform(results.begin(), results.end(), diff.begin(),
[mean](unsigned long x) { return x - mean; });
auto sump = inner_product(diff.begin(), diff.end(), diff.begin(), 0.0);
auto stdev = sqrt(sump / results.size());
cout << "Standard deviation: " << stdev << endl;
if (maxe > maxallowed) {
cout << "Error: Mon memory consumption exceeds maximum allowed!" << endl;
exit(ENOMEM);
}
grep.wait();
cout << "Completed successfully" << endl;
return 0;
}
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