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Member "xosview-1.23/linux/intratemeter.cc" (11 Jul 2020, 2336 Bytes) of package /linux/misc/xosview-1.23.tar.gz:
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1 //
2 // Copyright (c) 2014 by Tomi Tapper (tomi.o.tapper@jyu.fi)
3 //
4 // Based on bsd/intratemeter.* by
5 // Copyright (c) 1999 by Brian Grayson (bgrayson@netbsd.org)
6 // and on linux/intmeter.* by
7 // Copyright (c) 1994, 1995, 2006 by Mike Romberg ( mike.romberg@noaa.gov )
8 //
9 // This file may be distributed under terms of the GPL
10 //
11
12 #include "intratemeter.h"
13 #include "cpumeter.h"
14 #include <stdlib.h>
15 #include <fstream>
16 #include <string>
17 #include <iostream>
18
19 static const char *INTFILE = "/proc/interrupts";
20
21
22 IrqRateMeter::IrqRateMeter( XOSView *parent )
23 : FieldMeterGraph( parent, 2, "IRQs", "IRQs per sec/IDLE", 1, 1, 0 ) {
24 _lastirqs = 0;
25 _cpucount = CPUMeter::countCPUs();
26 }
27
28 IrqRateMeter::~IrqRateMeter( void ) {
29 }
30
31 void IrqRateMeter::checkResources( void ) {
32 FieldMeterGraph::checkResources();
33 setfieldcolor( 0, parent_->getResource("irqrateUsedColor") );
34 setfieldcolor( 1, parent_->getResource("irqrateIdleColor") );
35 priority_ = atoi( parent_->getResource("irqratePriority") );
36 dodecay_ = parent_->isResourceTrue("irqrateDecay");
37 useGraph_ = parent_->isResourceTrue("irqrateGraph");
38 SetUsedFormat( parent_->getResource("irqrateUsedFormat") );
39 total_ = 2000;
40 }
41
42 void IrqRateMeter::checkevent( void ) {
43 getinfo();
44 drawfields();
45 }
46
47 void IrqRateMeter::getinfo( void ) {
48 std::ifstream intfile(INTFILE);
49 std::string line;
50 unsigned long long count = 0;
51 unsigned long tmp;
52 const char *cur = NULL;
53 char *end = NULL;
54
55 if (!intfile) {
56 std::cerr << "Can not open file : " << INTFILE << std::endl;
57 parent_->done(1);
58 return;
59 }
60
61 IntervalTimerStop();
62 intfile.ignore(1024, '\n');
63
64 // sum all interrupts on all cpus
65 while ( !intfile.eof() ) {
66 unsigned int i = 0;
67 std::getline(intfile, line);
68 if ( line.find_first_of("0123456789") > line.find_first_of(':') )
69 break; // reached non-numeric interrupts
70 tmp = strtoul(line.c_str(), &end, 10);
71 cur = end + 1;
72 while (*cur && i++ < _cpucount) {
73 tmp = strtoul(cur, &end, 10);
74 count += tmp;
75 cur = end;
76 }
77 }
78 if (_lastirqs == 0) // first run
79 _lastirqs = count;
80 fields_[0] = (count - _lastirqs) / IntervalTimeInSecs();
81 IntervalTimerStart();
82 _lastirqs = count;
83
84 // Bump total, if needed.
85 if (fields_[0] > total_)
86 total_ = fields_[0];
87
88 setUsed(fields_[0], total_);
89 }