1 files changed, 79 insertions, 0 deletions
diff --git a/src/test/mon/test_mon_memory_target.cc b/src/test/mon/test_mon_memory_target.cc
new file mode 100644
index 000000000..e8f975b47
--- /dev/null
+++ b/src/test/mon/test_mon_memory_target.cc
@@ -0,0 +1,79 @@
+#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;
+}