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Member "xosview-1.23/gnu/loadmeter.cc" (11 Jul 2020, 3255 Bytes) of package /linux/misc/xosview-1.23.tar.gz:


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    1 //
    2 //  Copyright (c) 1994, 1995 by Mike Romberg ( romberg@fsl.noaa.gov )
    3 //  2007 by Samuel Thibault ( samuel.thibault@ens-lyon.org )
    4 //
    5 //  This file may be distributed under terms of the GPL
    6 //
    7 //  Most of this code was written by Werner Fink <werner@suse.de>.
    8 //  Only small changes were made on my part (M.R.)
    9 //
   10 
   11 #include "loadmeter.h"
   12 #include "xosview.h"
   13 #include <fstream>
   14 #include <stdlib.h>
   15 #include <error.h>
   16 
   17 extern "C" {
   18 #include <mach/mach_traps.h>
   19 #include <mach/mach_host.h>
   20 }
   21 
   22 LoadMeter::LoadMeter( XOSView *parent )
   23   : FieldMeterGraph( parent, 2, "LOAD", "PROCS/MIN", 1, 1, 0 ){
   24   lastalarmstate = -1;
   25   total_ = 2.0;
   26 }
   27 
   28 LoadMeter::~LoadMeter( void ){
   29 }
   30 
   31 void LoadMeter::checkResources( void ){
   32   FieldMeterGraph::checkResources();
   33 
   34   procloadcol_ = parent_->allocColor(parent_->getResource( "loadProcColor" ));
   35   warnloadcol_ = parent_->allocColor(parent_->getResource( "loadWarnColor" ));
   36   critloadcol_ = parent_->allocColor(parent_->getResource( "loadCritColor" ));
   37 
   38   setfieldcolor( 0, procloadcol_ );
   39   setfieldcolor( 1, parent_->getResource( "loadIdleColor" ) );
   40   priority_ = atoi (parent_->getResource( "loadPriority" ) );
   41   useGraph_ = parent_->isResourceTrue( "loadGraph" );
   42   dodecay_ = parent_->isResourceTrue( "loadDecay" );
   43   SetUsedFormat (parent_->getResource("loadUsedFormat"));
   44 
   45   warnThreshold = atoi (parent_->getResource("loadWarnThreshold"));
   46   critThreshold = atoi (parent_->getResource("loadCritThreshold"));
   47 
   48 
   49   if (dodecay_){
   50     //  Warning:  Since the loadmeter changes scale occasionally, old
   51     //  decay values need to be rescaled.  However, if they are rescaled,
   52     //  they could go off the edge of the screen.  Thus, for now, to
   53     //  prevent this whole problem, the load meter can not be a decay
   54     //  meter.  The load is a decaying average kind of thing anyway,
   55     //  so having a decaying load average is redundant.
   56     std::cerr << "Warning:  The loadmeter can not be configured as a decay\n"
   57          << "  meter.  See the source code (" << __FILE__ << ") for further\n"
   58          << "  details.\n";
   59     dodecay_ = 0;
   60   }
   61 }
   62 
   63 void LoadMeter::checkevent( void ){
   64   getloadinfo();
   65   drawfields();
   66 }
   67 
   68 
   69 void LoadMeter::getloadinfo( void ){
   70   host_load_info_data_t info;
   71   mach_msg_type_number_t count = HOST_LOAD_INFO_COUNT;
   72   kern_return_t err;
   73 
   74   err = host_info(mach_host_self(), HOST_LOAD_INFO, (host_info_t) &info, &count);
   75   if (err) {
   76     std::cerr << "Can not get host info";
   77     parent_->done(1);
   78     return;
   79   }
   80   fields_[0] = (float) info.avenrun[0] / LOAD_SCALE;
   81 
   82   if ( fields_[0] <  warnThreshold ) alarmstate = 0;
   83   else
   84   if ( fields_[0] >= critThreshold ) alarmstate = 2;
   85   else
   86   /* if fields_[0] >= warnThreshold */ alarmstate = 1;
   87 
   88   if ( alarmstate != lastalarmstate ){
   89     if ( alarmstate == 0 ) setfieldcolor( 0, procloadcol_ );
   90     else
   91     if ( alarmstate == 1 ) setfieldcolor( 0, warnloadcol_ );
   92     else
   93     /* if alarmstate == 2 */ setfieldcolor( 0, critloadcol_ );
   94     drawlegend();
   95     lastalarmstate = alarmstate;
   96   }
   97 
   98   if ( fields_[0]*5.0<total_ )
   99     total_ = fields_[0];
  100   else
  101   if ( fields_[0]>total_ )
  102     total_ = fields_[0]*5.0;
  103 
  104   if ( total_ < 1.0)
  105     total_ = 1.0;
  106 
  107   fields_[1] = (float) (total_ - fields_[0]);
  108 
  109   setUsed(fields_[0], (float) 1.0);
  110 }