1 files changed, 108 insertions, 0 deletions
diff --git a/linux/HugePageMeter.c b/linux/HugePageMeter.c
new file mode 100644
index 0000000..058ab4b
--- /dev/null
+++ b/linux/HugePageMeter.c
@@ -0,0 +1,108 @@
+/*
+htop - HugePageMeter.c
+(C) 2021 htop dev team
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "config.h" // IWYU pragma: keep
+
+#include "linux/HugePageMeter.h"
+
+#include <assert.h>
+#include <math.h>
+#include <stddef.h>
+
+#include "CRT.h"
+#include "Machine.h"
+#include "Macros.h"
+#include "Object.h"
+#include "RichString.h"
+#include "linux/LinuxMachine.h"
+
+
+static const char* HugePageMeter_active_labels[4] = { NULL, NULL, NULL, NULL };
+
+static const int HugePageMeter_attributes[] = {
+   HUGEPAGE_1,
+   HUGEPAGE_2,
+   HUGEPAGE_3,
+   HUGEPAGE_4,
+};
+
+static const char* const HugePageMeter_labels[] = {
+   " 64K:", " 128K:", " 256K:", " 512K:",
+   " 1M:", " 2M:", " 4M:", " 8M:", " 16M:", " 32M:", " 64M:", " 128M:", " 256M:", " 512M:",
+   " 1G:", " 2G:", " 4G:", " 8G:", " 16G:", " 32G:", " 64G:", " 128G:", " 256G:", " 512G:",
+};
+
+static void HugePageMeter_updateValues(Meter* this) {
+   assert(ARRAYSIZE(HugePageMeter_labels) == HTOP_HUGEPAGE_COUNT);
+
+   char* buffer = this->txtBuffer;
+   size_t size = sizeof(this->txtBuffer);
+   int written;
+   memory_t usedTotal = 0;
+   unsigned nextUsed = 0;
+
+   const LinuxMachine* host = (const LinuxMachine*) this->host;
+   this->total = host->totalHugePageMem;
+   this->values[0] = 0;
+   HugePageMeter_active_labels[0] = " used:";
+   for (unsigned i = 1; i < ARRAYSIZE(HugePageMeter_active_labels); i++) {
+      this->values[i] = NAN;
+      HugePageMeter_active_labels[i] = NULL;
+   }
+   for (unsigned i = 0; i < HTOP_HUGEPAGE_COUNT; i++) {
+      memory_t value = host->usedHugePageMem[i];
+      if (value != MEMORY_MAX) {
+         this->values[nextUsed] = value;
+         usedTotal += value;
+         HugePageMeter_active_labels[nextUsed] = HugePageMeter_labels[i];
+         if (++nextUsed == ARRAYSIZE(HugePageMeter_active_labels)) {
+            break;
+         }
+      }
+   }
+
+   written = Meter_humanUnit(buffer, usedTotal, size);
+   METER_BUFFER_CHECK(buffer, size, written);
+
+   METER_BUFFER_APPEND_CHR(buffer, size, '/');
+
+   Meter_humanUnit(buffer, this->total, size);
+}
+
+static void HugePageMeter_display(const Object* cast, RichString* out) {
+   char buffer[50];
+   const Meter* this = (const Meter*)cast;
+
+   RichString_writeAscii(out, CRT_colors[METER_TEXT], ":");
+   Meter_humanUnit(buffer, this->total, sizeof(buffer));
+   RichString_appendAscii(out, CRT_colors[METER_VALUE], buffer);
+
+   for (unsigned i = 0; i < ARRAYSIZE(HugePageMeter_active_labels); i++) {
+      if (!HugePageMeter_active_labels[i]) {
+         break;
+      }
+      RichString_appendAscii(out, CRT_colors[METER_TEXT], HugePageMeter_active_labels[i]);
+      Meter_humanUnit(buffer, this->values[i], sizeof(buffer));
+      RichString_appendAscii(out, CRT_colors[HUGEPAGE_1 + i], buffer);
+   }
+}
+
+const MeterClass HugePageMeter_class = {
+   .super = {
+      .extends = Class(Meter),
+      .delete = Meter_delete,
+      .display = HugePageMeter_display,
+   },
+   .updateValues = HugePageMeter_updateValues,
+   .defaultMode = BAR_METERMODE,
+   .maxItems = ARRAYSIZE(HugePageMeter_active_labels),
+   .total = 100.0,
+   .attributes = HugePageMeter_attributes,
+   .name = "HugePages",
+   .uiName = "HugePages",
+   .caption = "HP"
+};