Initial stab at Venti.

1 files changed, 64 insertions, 0 deletions

diff --git a/src/cmd/venti/stats.c b/src/cmd/venti/stats.c
new file mode 100644
index 00000000..edf79bd7
--- /dev/null
+++ b/src/cmd/venti/stats.c
@@ -0,0 +1,64 @@
+#include "stdinc.h"
+#include "dat.h"
+#include "fns.h"
+
+Stats stats;
+
+void
+statsinit(void)
+{
+}
+
+static int
+percent(long v, long total)
+{
+	if(total == 0)
+		total = 1;
+	if(v < 1000*1000)
+		return (v * 100) / total;
+	total /= 100;
+	if(total == 0)
+		total = 1;
+	return v / total;
+}
+
+void
+printstats(void)
+{
+	fprint(2, "lump writes=%,ld\n", stats.lumpwrites);
+	fprint(2, "lump reads=%,ld\n", stats.lumpreads);
+	fprint(2, "lump cache read hits=%,ld\n", stats.lumphit);
+	fprint(2, "lump cache read misses=%,ld\n", stats.lumpmiss);
+
+	fprint(2, "clump disk writes=%,ld\n", stats.clumpwrites);
+	fprint(2, "clump disk bytes written=%,lld\n", stats.clumpbwrites);
+	fprint(2, "clump disk bytes compressed=%,lld\n", stats.clumpbcomp);
+	fprint(2, "clump disk reads=%,ld\n", stats.clumpreads);
+	fprint(2, "clump disk bytes read=%,lld\n", stats.clumpbreads);
+	fprint(2, "clump disk bytes uncompressed=%,lld\n", stats.clumpbuncomp);
+
+	fprint(2, "clump directory disk writes=%,ld\n", stats.ciwrites);
+	fprint(2, "clump directory disk reads=%,ld\n", stats.cireads);
+
+	fprint(2, "index disk writes=%,ld\n", stats.indexwrites);
+	fprint(2, "index disk reads=%,ld\n", stats.indexreads);
+	fprint(2, "index disk reads for modify=%,ld\n", stats.indexwreads);
+	fprint(2, "index disk reads for allocation=%,ld\n", stats.indexareads);
+
+	fprint(2, "index cache lookups=%,ld\n", stats.iclookups);
+	fprint(2, "index cache hits=%,ld %d%%\n", stats.ichits,
+		percent(stats.ichits, stats.iclookups));
+	fprint(2, "index cache fills=%,ld %d%%\n", stats.icfills,
+		percent(stats.icfills, stats.iclookups));
+	fprint(2, "index cache inserts=%,ld\n", stats.icinserts);
+
+	fprint(2, "disk cache hits=%,ld\n", stats.pchit);
+	fprint(2, "disk cache misses=%,ld\n", stats.pcmiss);
+	fprint(2, "disk cache reads=%,ld\n", stats.pcreads);
+	fprint(2, "disk cache bytes read=%,lld\n", stats.pcbreads);
+
+	fprint(2, "disk writes=%,ld\n", stats.diskwrites);
+	fprint(2, "disk bytes written=%,lld\n", stats.diskbwrites);
+	fprint(2, "disk reads=%,ld\n", stats.diskreads);
+	fprint(2, "disk bytes read=%,lld\n", stats.diskbreads);
+}