r348 - trunk/varnish-cache/bin/varnishstat
phk at projects.linpro.no
phk at projects.linpro.no
Thu Jul 6 12:18:33 CEST 2006
Author: phk
Date: 2006-07-06 12:18:33 +0200 (Thu, 06 Jul 2006)
New Revision: 348
Modified:
trunk/varnish-cache/bin/varnishstat/varnishstat.c
Log:
Add exponential hitrate displays (with -c)
Modified: trunk/varnish-cache/bin/varnishstat/varnishstat.c
===================================================================
--- trunk/varnish-cache/bin/varnishstat/varnishstat.c 2006-07-06 09:31:45 UTC (rev 347)
+++ trunk/varnish-cache/bin/varnishstat/varnishstat.c 2006-07-06 10:18:33 UTC (rev 348)
@@ -15,6 +15,15 @@
#include "shmlog.h"
#include "varnishapi.h"
+static void
+myexp(double *acc, double val, unsigned *n, unsigned nmax)
+{
+
+ if (*n < nmax)
+ (*n)++;
+ (*acc) += (val - *acc) / (double)*n;
+}
+
int
main(int argc, char **argv)
{
@@ -24,8 +33,13 @@
int c_flag = 0;
intmax_t ju;
struct timespec ts;
- double tt, lt;
+ double tt, lt, hit, miss, ratio;
+ double a1, a2, a3;
+ unsigned n1, n2, n3;
+ a1 = a2 = a3 = 0;
+ n1 = n2 = n3 = 0;
+
lh = VSL_OpenLog();
VSL_stats = &lh->stats;
@@ -47,10 +61,26 @@
erase();
while (1) {
- move(0,0);
clock_gettime(CLOCK_MONOTONIC, &ts);
tt = ts.tv_nsec * 1e-9 + ts.tv_sec;
lt = tt - lt;
+ move(0,0);
+ hit = (intmax_t)VSL_stats->cache_hit -
+ (intmax_t)copy.cache_hit;
+ miss = (intmax_t)VSL_stats->cache_miss -
+ (intmax_t)copy.cache_miss;
+ hit /= lt;
+ miss /= lt;
+ if (hit + miss != 0) {
+ ratio = hit / (hit + miss);
+ myexp(&a1, ratio, &n1, 10);
+ myexp(&a2, ratio, &n2, 100);
+ myexp(&a3, ratio, &n3, 1000);
+ }
+ printw("Hitrate ratio: %8u %8u %8u\n", n1, n2, n3);
+ printw("Hitrate avg: %8.4f %8.4f %8.4f\n", a1, a2, a3);
+ printw("\n");
+
#define MAC_STAT(n,t,f,d) \
ju = VSL_stats->n; \
printw("%12ju %10.2f " d "\n", ju, (ju - (intmax_t)copy.n)/lt); \
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