1 files changed, 72 insertions, 0 deletions
diff --git a/src/test/mon/test_mon_rss_usage.cc b/src/test/mon/test_mon_rss_usage.cc
new file mode 100644
index 000000000..76b5856f6
--- /dev/null
+++ b/src/test/mon/test_mon_rss_usage.cc
@@ -0,0 +1,72 @@
+#include <algorithm>
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <numeric>
+#include <regex>
+#include <cmath>
+#include <system_error>
+
+using namespace std;
+
+int main(int argc, char **argv)
+{
+  cout << "Mon RSS Usage Test" << endl;
+
+  if (argc != 2) {
+    cout << "Syntax: "
+         << "ceph_test_mon_rss_usage <mon-memory-target-bytes>"
+         << endl;
+    exit(EINVAL);
+  }
+
+  unsigned long maxallowed = stoul(argv[1], nullptr, 10);
+  // Set max allowed RSS usage to be 125% of mon-memory-target
+  maxallowed *= 1.25;
+
+  string target_directory("/var/log/ceph/");
+  string filePath = target_directory + "ceph-mon-rss-usage.log";
+  ifstream buffer(filePath.c_str());
+  string line;
+  vector<unsigned long> results;
+  while(getline(buffer, line) && !line.empty()) {
+    string rssUsage;
+    size_t pos = line.find(':');
+    if (pos != string::npos) {
+      rssUsage = line.substr(0, pos);
+    }
+    if (!rssUsage.empty()) {
+      results.push_back(stoul(rssUsage));
+    }
+  }
+
+  buffer.close();
+  if (results.empty()) {
+    cout << "Error: No grep results found!" << endl;
+    exit(ENOENT);
+  }
+
+  auto maxe = *(max_element(results.begin(), results.end()));
+  cout << "Stats for mon RSS Memory Usage:" << endl;
+  cout << "Parsed " << results.size() << " entries." << 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 << fixed <<  "Standard deviation: " << stdev << endl;
+
+  if (maxe > maxallowed) {
+    cout << "Error: Mon RSS memory usage exceeds maximum allowed!" << endl;
+    exit(ENOMEM);
+  }
+
+  cout << "Completed successfully" << endl;
+  return 0;
+}