Support for ZFS Compressed ARC statistics

zfs/ZfsCompressedArcMeter.c

@@ -0,0 +1,86 @@
+/*
+htop - ZfsCompressedArcMeter.c
+(C) 2004-2011 Hisham H. Muhammad
+Released under the GNU GPL, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "ZfsCompressedArcMeter.h"
+#include "ZfsArcStats.h"
+
+#include "CRT.h"
+#include "Platform.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <sys/param.h>
+#include <assert.h>
+
+/*{
+#include "ZfsArcStats.h"
+
+#include "Meter.h"
+}*/
+
+int ZfsCompressedArcMeter_attributes[] = {
+   ZFS_COMPRESSED
+};
+
+void ZfsCompressedArcMeter_readStats(Meter* this, ZfsArcStats* stats) {
+   if ( stats->isCompressed ) {
+      this->total = stats->uncompressed;
+      this->values[0] = stats->compressed;
+   } else {
+      // For uncompressed ARC, report 1:1 ratio
+      this->total = stats->size;
+      this->values[0] = stats->size;
+   }
+}
+
+static void ZfsCompressedArcMeter_printRatioString(Meter* this, char* buffer, int size) {
+   xSnprintf(buffer, size, "%.2f:1", this->total/this->values[0]);
+}
+
+static void ZfsCompressedArcMeter_updateValues(Meter* this, char* buffer, int size) {
+   Platform_setZfsCompressedArcValues(this);
+
+   ZfsCompressedArcMeter_printRatioString(this, buffer, size);
+}
+
+static void ZfsCompressedArcMeter_display(Object* cast, RichString* out) {
+   char buffer[50];
+   Meter* this = (Meter*)cast;
+
+   if (this->values[0] > 0) {
+      Meter_humanUnit(buffer, this->total, 50);
+      RichString_append(out, CRT_colors[METER_VALUE], buffer);
+      RichString_append(out, CRT_colors[METER_TEXT], " Uncompressed, ");
+      Meter_humanUnit(buffer, this->values[0], 50);
+      RichString_append(out, CRT_colors[METER_VALUE], buffer);
+      RichString_append(out, CRT_colors[METER_TEXT], " Compressed, ");
+      ZfsCompressedArcMeter_printRatioString(this, buffer, 50);
+      RichString_append(out, CRT_colors[METER_VALUE], buffer);
+      RichString_append(out, CRT_colors[METER_TEXT], " Ratio");
+   } else {
+      RichString_write(out, CRT_colors[METER_TEXT], " ");
+      RichString_append(out, CRT_colors[FAILED_SEARCH], "Compression Unavailable");
+   }
+}
+
+MeterClass ZfsCompressedArcMeter_class = {
+   .super = {
+      .extends = Class(Meter),
+      .delete = Meter_delete,
+      .display = ZfsCompressedArcMeter_display,
+   },
+   .updateValues = ZfsCompressedArcMeter_updateValues,
+   .defaultMode = TEXT_METERMODE,
+   .maxItems = 1,
+   .total = 100.0,
+   .attributes = ZfsCompressedArcMeter_attributes,
+   .name = "ZFSCARC",
+   .uiName = "ZFS CARC",
+   .description = "ZFS CARC: Compressed ARC statistics",
+   .caption = "ARC: "
+};