From e6918187568dbd01842d8d1d2c808ce16a894239 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 21 Apr 2024 13:54:28 +0200
Subject: Adding upstream version 18.2.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/test/mon/test_log_rss_usage.cc | 102 +++++++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 src/test/mon/test_log_rss_usage.cc

(limited to 'src/test/mon/test_log_rss_usage.cc')

diff --git a/src/test/mon/test_log_rss_usage.cc b/src/test/mon/test_log_rss_usage.cc
new file mode 100644
index 000000000..b8ca3012a
--- /dev/null
+++ b/src/test/mon/test_log_rss_usage.cc
@@ -0,0 +1,102 @@
+#include <sys/types.h>
+#include <cstdint>
+#include <dirent.h>
+#include <errno.h>
+#include <vector>
+#include <string>
+#include <iostream>
+#include <fstream>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+using namespace std;
+
+int getPidByName(string procName)
+{
+  int pid = -1;
+
+  // Open the /proc directory
+  DIR *dp = opendir("/proc");
+  if (dp != NULL)
+  {
+    // Enumerate all entries in '/proc' until process is found
+    struct dirent *dirp;
+    while (pid < 0 && (dirp = readdir(dp)))
+    {
+      // Skip non-numeric entries
+      int id = atoi(dirp->d_name);
+      if (id > 0)
+      {
+        // Read contents of virtual /proc/{pid}/cmdline file
+        string cmdPath = string("/proc/") + dirp->d_name + "/cmdline";
+        ifstream cmdFile(cmdPath.c_str());
+        string cmdLine;
+        getline(cmdFile, cmdLine);
+        if (!cmdLine.empty())
+        {
+          // Keep first cmdline item which contains the program path
+          size_t pos = cmdLine.find('\0');
+          if (pos != string::npos) {
+            cmdLine = cmdLine.substr(0, pos);
+          }
+          // Get program name only, removing the path
+          pos = cmdLine.rfind('/');
+          if (pos != string::npos) {
+            cmdLine = cmdLine.substr(pos + 1);
+          }
+          // Compare against requested process name
+          if (procName == cmdLine) {
+            pid = id;
+          }
+        }
+      }
+    }
+  }
+
+  closedir(dp);
+
+  return pid;
+}
+
+uint64_t getRssUsage(string pid)
+{
+  int totalSize = 0;
+  int resSize = 0;
+
+  string statmPath = string("/proc/") + pid + "/statm";
+  ifstream buffer(statmPath);
+  buffer >> totalSize >> resSize;
+  buffer.close();
+
+  long page_size = sysconf(_SC_PAGE_SIZE);
+  uint64_t rss = resSize * page_size;
+
+  return rss;
+}
+
+int main(int argc, char* argv[])
+{
+  if (argc != 2) {
+    cout << "Syntax: "
+         << "ceph_test_log_rss_usage <process name>"
+         << endl;
+    exit(EINVAL);
+  }
+  uint64_t rss = 0;
+  int pid = getPidByName(argv[1]);
+  string rssUsage;
+
+  // Use the pid to get RSS memory usage
+  // and print it to stdout
+  if (pid != -1) {
+    rss = getRssUsage(to_string(pid));
+  } else {
+    cout << "Process " << argv[1] << " NOT FOUND!\n" << endl;
+    exit(ESRCH);
+  }
+
+  rssUsage = to_string(rss) + ":" + to_string(pid) + ":";
+  cout << rssUsage.c_str() << endl;
+  return 0;
+}
-- 
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