jean perrot / ctools

Commit a3805817835e45ec232e73fc0b156f09e4ce716e

Authored by Jürgen Knödlseder
1 parent e75fe5a4

Add get_current_rss() method to determine the physical memory size of the proces… 

…s. This method is useful for debugging the memory usage of ctools.
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Showing 2 changed files with 54 additions and 0 deletions
src/support/ctool.cpp
  View file @a380581
@@ -31,6 +31,21 @@ @@ -31,6 +31,21 @@
31 #include "ctool.hpp" 31 #include "ctool.hpp"
32 #include "GTools.hpp" 32 #include "GTools.hpp"
33 33
  34 +/* __ Includes for memory usage determination ____________________________ */
  35 +#if defined(__unix__) || defined(__unix) || defined(unix) || (defined(__APPLE__) && defined(__MACH__))
  36 +#include <unistd.h>
  37 +#include <sys/resource.h>
  38 +#if defined(__APPLE__) && defined(__MACH__)
  39 +#include <mach/mach.h>
  40 +#elif (defined(_AIX) || defined(__TOS__AIX__)) || (defined(__sun__) || defined(__sun) || defined(sun) && (defined(__SVR4) || defined(__svr4__)))
  41 +#include <fcntl.h>
  42 +#include <procfs.h>
  43 +#elif defined(__linux__) || defined(__linux) || defined(linux) || defined(__gnu_linux__)
  44 +#include <stdio.h>
  45 +#endif
  46 +#endif
  47 +
  48 +
34 /* __ Method name definitions ____________________________________________ */ 49 /* __ Method name definitions ____________________________________________ */
35 #define G_GET_EBOUNDS "ctool::get_ebounds()" 50 #define G_GET_EBOUNDS "ctool::get_ebounds()"
36 51
@@ -391,3 +406,41 @@ void ctool::set_obs_response(GCTAObservation* obs) @@ -391,3 +406,41 @@ void ctool::set_obs_response(GCTAObservation* obs)
391 // Return 406 // Return
392 return; 407 return;
393 } 408 }
  409 +
  410 +
  411 +/***********************************************************************//**
  412 + * @brief Get current resident set size (physical memory use) in Bytes
  413 + *
  414 + * @return Physical memory use in Bytes.
  415 + ***************************************************************************/
  416 +size_t ctool::get_current_rss(void)
  417 +{
  418 + // Initialize resident set size
  419 + size_t rss = 0;
  420 +
  421 + // Determine resident set size (architecture dependent)
  422 + // OSX
  423 + #if defined(__APPLE__) && defined(__MACH__)
  424 + struct mach_task_basic_info info;
  425 + mach_msg_type_number_t infoCount = MACH_TASK_BASIC_INFO_COUNT;
  426 + if (task_info(mach_task_self( ), MACH_TASK_BASIC_INFO,
  427 + (task_info_t)&info, &infoCount) == KERN_SUCCESS) {
  428 + rss = (size_t)info.resident_size;
  429 + }
  430 + // Linux
  431 + #elif defined(__linux__) || defined(__linux) || defined(linux) || defined(__gnu_linux__)
  432 + FILE* fp = NULL;
  433 + if ((fp = fopen( "/proc/self/statm", "r" )) != NULL) {
  434 + if (fscanf( fp, "%*s%ld", &rss ) == 1) {
  435 + rss *= (size_t)sysconf(_SC_PAGESIZE);
  436 + }
  437 + fclose(fp);
  438 + }
  439 + // AIX, BSD, Solaris, and Unknown OS
  440 + #else
  441 + rss = 0;
  442 + #endif
  443 +
  444 + // Return resident set size
  445 + return rss;
  446 +}
src/support/ctool.hpp
  View file @a380581
@@ -69,6 +69,7 @@ protected: @@ -69,6 +69,7 @@ protected:
69 GEbounds get_ebounds(void); 69 GEbounds get_ebounds(void);
70 void set_response(GObservations& obs); 70 void set_response(GObservations& obs);
71 void set_obs_response(GCTAObservation* obs); 71 void set_obs_response(GCTAObservation* obs);
  72 + size_t get_current_rss(void);
72 73
73 // Protected members 74 // Protected members
74 bool m_read_ahead; //!< Read ahead parameters 75 bool m_read_ahead; //!< Read ahead parameters