mirror of https://github.com/xzeldon/htop.git
93 lines
3.2 KiB
C
93 lines
3.2 KiB
C
/*
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htop - DiskIOMeter.c
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(C) 2020 Christian Göttsche
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Released under the GNU GPLv2, see the COPYING file
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in the source distribution for its full text.
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*/
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#include "DiskIOMeter.h"
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#include <math.h>
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#include "CRT.h"
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#include "Platform.h"
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static const int DiskIOMeter_attributes[] = {
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METER_VALUE_NOTICE,
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METER_VALUE_IOREAD,
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METER_VALUE_IOWRITE,
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};
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static unsigned long int cached_read_diff = 0;
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static unsigned long int cached_write_diff = 0;
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static double cached_utilisation_diff = 0.0;
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static void DiskIOMeter_updateValues(Meter* this, char* buffer, int len) {
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static unsigned long int cached_read_total = 0;
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static unsigned long int cached_write_total = 0;
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static unsigned long int cached_msTimeSpend_total = 0;
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static unsigned long long int cached_last_update = 0;
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struct timeval tv;
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gettimeofday(&tv, NULL);
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unsigned long long int timeInMilliSeconds = (unsigned long long int)tv.tv_sec * 1000 + (unsigned long long int)tv.tv_usec / 1000;
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/* update only every 500ms */
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if (timeInMilliSeconds - cached_last_update > 500) {
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unsigned long int bytesRead, bytesWrite, msTimeSpend;
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Platform_getDiskIO(&bytesRead, &bytesWrite, &msTimeSpend);
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cached_read_diff = (bytesRead - cached_read_total) / 1024; /* Meter_humanUnit() expects unit in kilo */
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cached_read_total = bytesRead;
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cached_write_diff = (bytesWrite - cached_write_total) / 1024; /* Meter_humanUnit() expects unit in kilo */
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cached_write_total = bytesWrite;
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cached_utilisation_diff = 100 * (double)(msTimeSpend - cached_msTimeSpend_total) / (timeInMilliSeconds - cached_last_update);
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cached_last_update = timeInMilliSeconds;
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cached_msTimeSpend_total = msTimeSpend;
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}
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this->values[0] = cached_utilisation_diff;
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this->total = MAXIMUM(this->values[0], 100.0); /* fix total after (initial) spike */
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char bufferRead[12], bufferWrite[12];
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Meter_humanUnit(bufferRead, cached_read_diff, sizeof(bufferRead));
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Meter_humanUnit(bufferWrite, cached_write_diff, sizeof(bufferWrite));
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snprintf(buffer, len, "%sB %sB %.1f%%", bufferRead, bufferWrite, cached_utilisation_diff);
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}
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static void DIskIOMeter_display(ATTR_UNUSED const Object* cast, RichString* out) {
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char buffer[16];
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int color = cached_utilisation_diff > 40.0 ? METER_VALUE_NOTICE : METER_VALUE;
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xSnprintf(buffer, sizeof(buffer), "%.1f%%", cached_utilisation_diff);
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RichString_write(out, CRT_colors[color], buffer);
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RichString_append(out, CRT_colors[METER_TEXT], " read: ");
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Meter_humanUnit(buffer, cached_read_diff, sizeof(buffer));
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RichString_append(out, CRT_colors[METER_VALUE_IOREAD], buffer);
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RichString_append(out, CRT_colors[METER_TEXT], " write: ");
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Meter_humanUnit(buffer, cached_write_diff, sizeof(buffer));
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RichString_append(out, CRT_colors[METER_VALUE_IOWRITE], buffer);
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}
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const MeterClass DiskIOMeter_class = {
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.super = {
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.extends = Class(Meter),
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.delete = Meter_delete,
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.display = DIskIOMeter_display
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},
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.updateValues = DiskIOMeter_updateValues,
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.defaultMode = TEXT_METERMODE,
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.maxItems = 1,
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.total = 100.0,
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.attributes = DiskIOMeter_attributes,
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.name = "DiskIO",
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.uiName = "Disk IO",
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.caption = "Disk IO: "
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};
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