Top with ZFS ARC

This is a patch i developed to add zfs arc cache stats to unix top ( 3.8 beta 1 ) for solaris

machine.h:

--- top-3.8beta1/machine.h      Wed May  7 13:41:39 2008
+++ top-zfs/machine.h   Thu Jan 21 09:26:00 2010
@@ -84,6 +84,7 @@
     int    *cpustates;
     int    *kernel;
     long   *memory;
+    long   *zfs_cache;
     long   *swap;
 };

machine/m_sunos5.c:

--- top-3.8beta1/machine/m_sunos5.c     Wed May  7 13:41:38 2008
+++ top-zfs/machine/m_sunos5.c  Thu Jan 21 09:26:02 2010
@@ -286,13 +286,14 @@


 /* these are for detailing the memory statistics */
-long memory_stats[5];
+long memory_stats[6];
 char *memorynames[] =
-{"K phys mem, ", "K free mem, ", "K total swap, ", "K free swap", NULL};
+{"K phys mem, ", "K free mem, ", "K total swap, ", "K free swap, ", "K zfs cache", NULL};
 #define MEMORY_TOTALMEM  0
 #define MEMORY_FREEMEM   1
 #define MEMORY_TOTALSWAP 2
 #define MEMORY_FREESWAP  3
+#define ZFS_CACHE  4

 /* these are for detailing kernel statistics */
 int kernel_stats[8];
@@ -1105,6 +1106,38 @@
     return (0);
 }

+int
+get_zfscache ( long *total )
+{
+
+    long cache;
+    static kstat_t *ks = NULL;
+    kstat_named_t *kn;
+
+        /* only need to grab kstat chain once */
+        if (ks == NULL)
+        {
+            ks = kstat_lookup(kc, "zfs", 0, "arcstats");
+        }
+
+        if (ks != NULL &&
+            kstat_read(kc, ks, 0) != -1 &&
+            (kn = kstat_data_lookup(ks, "size")) != NULL)
+        {
+            cache = kstat_data_value_l(kn) / 1024 ;
+        }
+        else
+        {
+            cache = -1;
+        }
+
+    *total = cache;
+
+    return (0);
+
+
+
+}
 /*
  * void get_swapinfo(long *total, long *fr)
  *
@@ -1466,6 +1499,13 @@
        memory_stats[MEMORY_TOTALSWAP] = memory_stats[MEMORY_FREESWAP] = -1;
     }

+   if ( get_zfscache(&memory_stats[ZFS_CACHE]) == -1 )
+   {
+
+       memory_stats[ZFS_CACHE] = -1;
+   }
+
+
     /* get kernel data */
     kernel_stats[KERNEL_CSWITCH] = diff_per_second(sum_current.pswitch, sum_old.pswitch);
     kernel_stats[KERNEL_TRAP] = diff_per_second(sum_current.trap, sum_old.trap);