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--- cpustat.cpp.orig 2019-01-24 21:43:32 UTC
+++ cpustat.cpp
@@ -27,11 +27,62 @@
#include <unistd.h>
#include "cpustat.h"
+#ifdef HAVE_SYSCTL_H
+extern "C"
+{
+ #include <stdlib.h>
+ #include <limits.h>
+ #include <string.h>
+ #include <sys/resource.h> /* CPUSTATES */
+
+ #include <sys/types.h>
+ #include <sys/sysctl.h>
+}
+#endif
#include "cpustat_p.h"
namespace SysStat {
+#ifdef HAVE_SYSCTL_H
+char *GetFirstFragment(char *string, const char *delim)
+{
+ char *token = NULL;
+ token = strsep(&string, delim);
+ if (token != NULL)
+ {
+ /* We need only the first fragment, so no loop! */
+ return token;
+ }
+ else
+ return NULL;
+}
+
+int GetCpu(void)
+{
+ static int mib[] = { CTL_HW, HW_NCPU };
+ int buf;
+ size_t len = sizeof(int);
+
+ if (sysctl(mib, 2, &buf, &len, NULL, 0) < 0)
+ return 0;
+ else
+ return buf;
+}
+
+/* Frequence is in MHz */
+ulong CurrentFreq(void)
+{
+ ulong freq=0;
+ size_t len = sizeof(freq);
+
+ if (sysctlbyname("dev.cpu.0.freq", &freq, &len, NULL, 0) < 0) // man cpufreq BUGS section all cores have the same frequency.
+ return 0;
+ else
+ return freq;
+
+}
+#endif
CpuStatPrivate::CpuStatPrivate(CpuStat *parent)
: BaseStatPrivate(parent)
, mMonitoring(CpuStat::LoadAndFrequency)
@@ -39,7 +90,11 @@ CpuStatPrivate::CpuStatPrivate(CpuStat *parent)
mSource = defaultSource();
connect(mTimer, SIGNAL(timeout()), SLOT(timeout()));
-
+#ifdef HAVE_SYSCTL_H
+ size_t flen=2;
+ sysctlnametomib("kern.cp_times",mib0,&flen);
+ sysctlnametomib("kern.cp_time",mib1,&flen);
+#endif
mUserHz = sysconf(_SC_CLK_TCK);
updateSources();
@@ -47,6 +102,49 @@ CpuStatPrivate::CpuStatPrivate(CpuStat *parent)
void CpuStatPrivate::addSource(const QString &source)
{
+#ifdef HAVE_SYSCTL_H
+ char buf[1024];
+ char *tokens, *t;
+ ulong min = 0, max = 0;
+ size_t len = sizeof(buf);
+
+ /* The string returned by the dev.cpu.0.freq_levels sysctl
+ * is a space separated list of MHz/milliwatts.
+ */
+ if (sysctlbyname("dev.cpu.0.freq_levels", buf, &len, NULL, 0) < 0)
+ return;
+
+ t = strndup(buf, len);
+ if (t == NULL)
+ {
+ free(t);
+ return;
+ }
+
+ while ((tokens = strsep(&t, " ")) != NULL)
+ {
+ char *freq;
+ ulong res;
+
+ freq = GetFirstFragment(tokens, "/");
+ if (freq != NULL)
+ {
+ res = strtoul(freq, &freq, 10);
+ if (res > max)
+ {
+ max = res;
+ }
+ else
+ {
+ if ((min == 0) || (res < min))
+ min = res;
+ }
+ }
+ }
+
+ free(t);
+ mBounds[source] = qMakePair(min, max);
+ #else
bool ok;
uint min = readAllFile(qPrintable(QString::fromLatin1("/sys/devices/system/cpu/%1/cpufreq/scaling_min_freq").arg(source))).toUInt(&ok);
@@ -56,12 +154,27 @@ void CpuStatPrivate::addSource(const QString &source)
if (ok)
mBounds[source] = qMakePair(min, max);
}
+#endif
}
void CpuStatPrivate::updateSources()
{
mSources.clear();
+#ifdef HAVE_SYSCTL_H
+ mBounds.clear();
+ int cpu;
+ cpu = GetCpu();
+ mSources.append(QStringLiteral("cpu")); // Linux has cpu in /proc/stat
+ for (int i =0;i<cpu;i++)
+ {
+ mSources.append(QString::fromLatin1("cpu%1").arg(i));
+
+
+
+ addSource(QString::fromLatin1("cpu%1").arg(i));
+ }
+#else
const QStringList rows = readAllFile("/proc/stat").split(QLatin1Char('\n'), QString::SkipEmptyParts);
for (const QString &row : rows)
{
@@ -99,6 +212,7 @@ void CpuStatPrivate::updateSources()
addSource(QString::fromLatin1("cpu%1").arg(number));
}
}
+#endif
}
CpuStatPrivate::~CpuStatPrivate()
@@ -127,6 +241,88 @@ void CpuStatPrivate::recalculateMinMax()
void CpuStatPrivate::timeout()
{
+#ifdef HAVE_SYSCTL_H
+ if ( (mMonitoring == CpuStat::LoadOnly)
+ || (mMonitoring == CpuStat::LoadAndFrequency) )
+ {
+ int cpuNumber=0;
+ long *cp_times=0;
+ if(mSource!=QLatin1String("cpu")) {
+ size_t cp_size = sizeof(long) * CPUSTATES * GetCpu();
+ cp_times = (long *)malloc(cp_size);
+ cpuNumber = mSource.midRef(3).toInt();
+ if (sysctl(mib0,2, cp_times, &cp_size, NULL, 0) < 0)
+ free(cp_times);
+ } else {
+ size_t cp_size = sizeof(long)*CPUSTATES;
+ cp_times = (long *)malloc(cp_size);
+ if(sysctl(mib1,2,cp_times,&cp_size,NULL,0) < 0)
+ free(cp_times);
+ }
+ Values current;
+ current.user = static_cast<ulong>(cp_times[CP_USER+cpuNumber*CPUSTATES]);
+ current.nice = static_cast<ulong>(cp_times[CP_NICE+cpuNumber*CPUSTATES]);
+ current.system = static_cast<ulong>(cp_times[CP_SYS+cpuNumber*CPUSTATES]);
+ current.idle = static_cast<ulong>(cp_times[CP_IDLE+cpuNumber*CPUSTATES]);
+ current.other = static_cast<ulong>(cp_times[CP_INTR+cpuNumber*CPUSTATES]);
+ current.total = current.user + current.nice + current.system+current.idle+current.other;
+
+ float sumDelta = static_cast<float>(current.total - mPrevious.total);
+
+ if ((mPrevious.total != 0) && ((sumDelta < mIntervalMin) || (sumDelta > mIntervalMax)))
+ {
+ if (mMonitoring == CpuStat::LoadAndFrequency)
+ emit update(0.0, 0.0, 0.0, 0.0, 0.0, 0);
+ else
+ emit update(0.0, 0.0, 0.0, 0.0);
+
+ mPrevious.clear();
+ }
+ else
+ {
+ if (mMonitoring == CpuStat::LoadAndFrequency)
+ {
+ float freqRate = 1.0;
+ ulong freq = CurrentFreq();
+ if (freq > 0)
+ {
+ if(mSource==QLatin1String("cpu"))
+ freqRate = static_cast<float>(freq) / static_cast<float>(mBounds[QStringLiteral("cpu0")].second);// use max cpu0 for this case
+ else
+ freqRate = static_cast<float>(freq) / static_cast<float>(mBounds[mSource].second);
+ emit update(
+ static_cast<float>(current.user - mPrevious.user ) / sumDelta,
+ static_cast<float>(current.nice - mPrevious.nice ) / sumDelta,
+ static_cast<float>(current.system - mPrevious.system) / sumDelta,
+ static_cast<float>(current.other - mPrevious.other ) / sumDelta,
+ static_cast<float>(freqRate),
+ freq);
+ }
+ }
+ else
+ {
+ emit update(
+ static_cast<float>(current.user - mPrevious.user ) / sumDelta,
+ static_cast<float>(current.nice - mPrevious.nice ) / sumDelta,
+ static_cast<float>(current.system - mPrevious.system) / sumDelta,
+ static_cast<float>(current.other - mPrevious.other ) / sumDelta);
+ }
+
+
+ mPrevious = current;
+ }
+
+ free(cp_times);
+ }
+ else
+ {
+ ulong freq = 0;
+
+ freq = CurrentFreq();
+ if (freq > 0)
+ emit update(freq);
+ }
+#else
if ( (mMonitoring == CpuStat::LoadOnly)
|| (mMonitoring == CpuStat::LoadAndFrequency) )
{
@@ -261,6 +457,7 @@ void CpuStatPrivate::timeout()
}
emit update(freq);
}
+#endif
}
QString CpuStatPrivate::defaultSource()
|
