An automated test that keeps memory usage in check.

And ensures we scale linearly with the number of entities.

1 files changed, 124 insertions, 0 deletions

diff --git a/tests/getrssusage.cpp b/tests/getrssusage.cpp
new file mode 100644
index 0000000..020c7d6
--- /dev/null
+++ b/tests/getrssusage.cpp
@@ -0,0 +1,124 @@
+/*
+ * Author:  David Robert Nadeau
+ * Site:    http://NadeauSoftware.com/
+ * License: Creative Commons Attribution 3.0 Unported License
+ *          http://creativecommons.org/licenses/by/3.0/deed.en_US
+ *
+ * This file has been adapted to match the coding style of the rest of the codebase.
+ *
+ * On windows link against psapi.lib, for the rest the standard library is sufficient.
+ */
+#include "getrssusage.h"
+
+#if defined(_WIN32)
+#include <windows.h>
+#include <psapi.h>
+
+#elif defined(__unix__) || defined(__unix) || defined(unix) || (defined(__APPLE__) && defined(__MACH__))
+#include <unistd.h>
+#include <sys/resource.h>
+
+#if defined(__APPLE__) && defined(__MACH__)
+#include <mach/mach.h>
+
+#elif (defined(_AIX) || defined(__TOS__AIX__)) || (defined(__sun__) || defined(__sun) || defined(sun) && (defined(__SVR4) || defined(__svr4__)))
+#include <fcntl.h>
+#include <procfs.h>
+
+#elif defined(__linux__) || defined(__linux) || defined(linux) || defined(__gnu_linux__)
+#include <stdio.h>
+
+#endif
+
+#else
+#error "Cannot define getPeakRSS( ) or getCurrentRSS( ) for an unknown OS."
+#endif
+
+
+/**
+ * Returns the peak (maximum so far) resident set size (physical
+ * memory use) measured in bytes, or zero if the value cannot be
+ * determined on this OS.
+ */
+size_t getPeakRSS( )
+{
+#if defined(_WIN32)
+        /* Windows -------------------------------------------------- */
+        PROCESS_MEMORY_COUNTERS info;
+        GetProcessMemoryInfo( GetCurrentProcess( ), &info, sizeof(info) );
+        return (size_t)info.PeakWorkingSetSize;
+
+#elif (defined(_AIX) || defined(__TOS__AIX__)) || (defined(__sun__) || defined(__sun) || defined(sun) && (defined(__SVR4) || defined(__svr4__)))
+        /* AIX and Solaris ------------------------------------------ */
+        struct psinfo psinfo;
+        int fd = -1;
+        if ( (fd = open( "/proc/self/psinfo", O_RDONLY )) == -1 )
+                return (size_t)0L;              /* Can't open? */
+        if ( read( fd, &psinfo, sizeof(psinfo) ) != sizeof(psinfo) )
+        {
+                close( fd );
+                return (size_t)0L;              /* Can't read? */
+        }
+        close( fd );
+        return (size_t)(psinfo.pr_rssize * 1024L);
+
+#elif defined(__unix__) || defined(__unix) || defined(unix) || (defined(__APPLE__) && defined(__MACH__))
+        /* BSD, Linux, and OSX -------------------------------------- */
+        struct rusage rusage;
+        getrusage( RUSAGE_SELF, &rusage );
+#if defined(__APPLE__) && defined(__MACH__)
+        return (size_t)rusage.ru_maxrss;
+#else
+        return (size_t)(rusage.ru_maxrss * 1024L);
+#endif
+
+#else
+        /* Unknown OS ----------------------------------------------- */
+        return (size_t)0L;                      /* Unsupported. */
+#endif
+}
+
+
+
+
+
+/**
+ * Returns the current resident set size (physical memory use) measured
+ * in bytes, or zero if the value cannot be determined on this OS.
+ */
+size_t getCurrentRSS( )
+{
+#if defined(_WIN32)
+        /* Windows -------------------------------------------------- */
+        PROCESS_MEMORY_COUNTERS info;
+        GetProcessMemoryInfo( GetCurrentProcess( ), &info, sizeof(info) );
+        return (size_t)info.WorkingSetSize;
+
+#elif defined(__APPLE__) && defined(__MACH__)
+        /* OSX ------------------------------------------------------ */
+        struct mach_task_basic_info info;
+        mach_msg_type_number_t infoCount = MACH_TASK_BASIC_INFO_COUNT;
+        if ( task_info( mach_task_self( ), MACH_TASK_BASIC_INFO,
+                (task_info_t)&info, &infoCount ) != KERN_SUCCESS )
+                return (size_t)0L;              /* Can't access? */
+        return (size_t)info.resident_size;
+
+#elif defined(__linux__) || defined(__linux) || defined(linux) || defined(__gnu_linux__)
+        /* Linux ---------------------------------------------------- */
+        long rss = 0L;
+        FILE* fp = NULL;
+        if ( (fp = fopen( "/proc/self/statm", "r" )) == NULL )
+                return (size_t)0L;              /* Can't open? */
+        if ( fscanf( fp, "%*s%ld", &rss ) != 1 )
+        {
+                fclose( fp );
+                return (size_t)0L;              /* Can't read? */
+        }
+        fclose( fp );
+        return (size_t)rss * (size_t)sysconf( _SC_PAGESIZE);
+
+#else
+        /* AIX, BSD, Solaris, and Unknown OS ------------------------ */
+        return (size_t)0L;                      /* Unsupported. */
+#endif
+}