art::MallocOptionSetter Class Reference

#include "MallocOpts.h"

Public Types
using	opt_type = MallocOpts::opt_type

Public Member Functions
	MallocOptionSetter ()
bool	retrieveFromCpuType ()
bool	retrieveFromEnv ()
void	adjustMallocParams ()
bool	hasErrors () const
std::string	error_message () const
void	set_mmap_max (opt_type mmap_max)
void	set_trim_thr (opt_type trim_thr)
void	set_top_pad (opt_type top_pad)
void	set_mmap_thr (opt_type mmap_thr)
MallocOpts	get () const

Private Attributes
bool	changed_
MallocOpts	values_
std::string	error_message_

Detailed Description

Definition at line 61 of file MallocOpts.h.

Member Typedef Documentation

using art::MallocOptionSetter::opt_type = MallocOpts::opt_type

Definition at line 63 of file MallocOpts.h.

Constructor & Destructor Documentation

art::MallocOptionSetter::MallocOptionSetter

(

)

Definition at line 134 of file MallocOpts.cc.

References adjustMallocParams(), error_message_, hasErrors(), retrieveFromCpuType(), and retrieveFromEnv().

                                         : changed_(false)
  {
    if (retrieveFromEnv() || retrieveFromCpuType()) {
      adjustMallocParams();
      if (hasErrors()) {
        std::cerr << "ERROR: Reset of malloc options has fails:\n"
                  << error_message_ << '\n';
      }
    }
  }

Member Function Documentation

void art::MallocOptionSetter::adjustMallocParams

(

)

Definition at line 146 of file MallocOpts.cc.

References changed_, error_message_, art::MallocOpts::mmap_max_, art::MallocOpts::mmap_thr_, art::MallocOpts::top_pad_, art::MallocOpts::trim_thr_, and values_.

Referenced by MallocOptionSetter().

  {
    if (changed_ == false)
      return; // only adjust if they changed
    error_message_.clear();
    changed_ = false;

#ifdef M_MMAP_MAX
    if (mallopt(M_MMAP_MAX, values_.mmap_max_) < 0)
      error_message_ += "Could not set M_MMAP_MAX\n";
#endif
#ifdef M_TRIM_THRESHOLD
    if (mallopt(M_TRIM_THRESHOLD, values_.trim_thr_) < 0)
      error_message_ += "Could not set M_TRIM_THRESHOLD\n";
#endif
#ifdef M_TOP_PAD
    if (mallopt(M_TOP_PAD, values_.top_pad_) < 0)
      error_message_ += "ERROR: Could not set M_TOP_PAD\n";
#endif
#ifdef M_MMAP_THRESHOLD
    if (mallopt(M_MMAP_THRESHOLD, values_.mmap_thr_) < 0)
      error_message_ += "ERROR: Could not set M_MMAP_THRESHOLD\n";
#endif
  }

std::string art::MallocOptionSetter::error_message ( ) const

inline

Definition at line 75 of file MallocOpts.h.

    {
      return error_message_;
    }

MallocOpts art::MallocOptionSetter::get ( ) const

inline

Definition at line 106 of file MallocOpts.h.

    {
      return values_;
    }

bool art::MallocOptionSetter::hasErrors ( ) const

inline

Definition at line 70 of file MallocOpts.h.

Referenced by MallocOptionSetter().

    {
      return !error_message_.empty();
    }

bool art::MallocOptionSetter::retrieveFromCpuType

(

)

Definition at line 111 of file MallocOpts.cc.

References changed_, and values_.

Referenced by MallocOptionSetter().

  {
    bool rc = true;

    switch (get_cpu_type()) {
    case AMD_CPU: {
      values_ = amd_opts;
      changed_ = true;
      break;
    }
    case INTEL_CPU: {
      values_ = intel_opts;
      changed_ = true;
      break;
    }
    case UNKNOWN_CPU:
    default:
      rc = false;
    }

    return rc;
  }

bool art::MallocOptionSetter::retrieveFromEnv

(

)

Definition at line 172 of file MallocOpts.cc.

References changed_, art::MallocOpts::mmap_max_, art::MallocOpts::mmap_thr_, art::MallocOpts::top_pad_, art::MallocOpts::trim_thr_, and values_.

Referenced by MallocOptionSetter().

  {
    const char* par = getenv("ART_MALLOC_RESET");
    if (par == 0)
      return false; // leave quickly here
    std::string spar(par);
    bool rc = false;

    if (spar.size() > 1) {
      std::istringstream ist(spar);
      ist >> values_.mmap_max_ >> values_.trim_thr_ >> values_.top_pad_ >>
        values_.mmap_thr_;

      if (ist.bad()) {
        std::cerr
          << "bad malloc options in ART_MALLOC_RESET: " << spar << '\n'
          << "format is: "
          << "ART_MALLOC_RESET=\"mmap_max trim_thres top_pad mmap_thres\"\n";
      } else {
        std::cout << "MALLOC_OPTIONS> Reset options: "
                  << "ART_MALLOC_RESET=" << par << '\n';
      }
      rc = true;
      changed_ = true;
    }

    return rc;
  }

void art::MallocOptionSetter::set_mmap_max ( opt_type  mmap_max )

inline

Definition at line 81 of file MallocOpts.h.

    {
      values_.mmap_max_ = mmap_max;
      changed_ = true;
    }

void art::MallocOptionSetter::set_mmap_thr ( opt_type  mmap_thr )

inline

Definition at line 99 of file MallocOpts.h.

    {
      values_.mmap_thr_ = mmap_thr;
      changed_ = true;
    }

void art::MallocOptionSetter::set_top_pad ( opt_type  top_pad )

inline

Definition at line 93 of file MallocOpts.h.

    {
      values_.top_pad_ = top_pad;
      changed_ = true;
    }

void art::MallocOptionSetter::set_trim_thr ( opt_type  trim_thr )

inline

Definition at line 87 of file MallocOpts.h.

    {
      values_.trim_thr_ = trim_thr;
      changed_ = true;
    }

Member Data Documentation

bool art::MallocOptionSetter::changed_

private

Definition at line 112 of file MallocOpts.h.

Referenced by adjustMallocParams(), retrieveFromCpuType(), and retrieveFromEnv().

std::string art::MallocOptionSetter::error_message_

private

Definition at line 115 of file MallocOpts.h.

Referenced by adjustMallocParams(), and MallocOptionSetter().

MallocOpts art::MallocOptionSetter::values_

private

Definition at line 113 of file MallocOpts.h.

Referenced by adjustMallocParams(), retrieveFromCpuType(), and retrieveFromEnv().

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The documentation for this class was generated from the following files:

• art/Utilities/MallocOpts.h
• art/Utilities/MallocOpts.cc