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Also report tx bandwidth with Ethernet overhead

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This commit is contained in:
Ed Maste 2012-07-06 15:36:39 +00:00
parent e0bc3c3d99
commit 66a698c9bc
1 changed files with 28 additions and 14 deletions
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42
tools/tools/netmap/pkt-gen.c
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@ -653,27 +653,41 @@ receiver_body(void *data)
return (NULL);
}
static char *
scaled_val(double val)
{
static char buf[64];
const char *units[] = {"", "K", "M", "G"};
int i = 0;
while (val >= 1000 && i < 3) {
val /= 1000;
i++;
}
snprintf(buf, sizeof(buf), "%.2f%s", val, units[i]);
return (buf);
}
static void
tx_output(uint64_t sent, int size, double delta)
{
double amount = 8.0 * (1.0 * size * sent) / delta;
uint64_t bytes_sent = sent * size;
double bw = 8.0 * bytes_sent / delta;
double pps = sent / delta;
char units[4] = { '\0', 'K', 'M', 'G' };
int aunit = 0, punit = 0;
while (amount >= 1000) {
amount /= 1000;
aunit += 1;
}
while (pps >= 1000) {
pps /= 1000;
punit += 1;
}
/*
* Assume Ethernet overhead of 24 bytes per packet excluding header:
* FCS 4 bytes
* Preamble 8 bytes
* IFG 12 bytes
*/
double bw_with_overhead = 8.0 * (bytes_sent + sent * 24) / delta;
printf("Sent %" PRIu64 " packets, %d bytes each, in %.2f seconds.\n",
sent, size, delta);
printf("Speed: %.2f%cpps. Bandwidth: %.2f%cbps.\n",
pps, units[punit], amount, units[aunit]);
printf("Speed: %spps. ", scaled_val(pps));
printf("Bandwidth: %sbps ", scaled_val(bw));
printf("(%sbps with overhead).\n", scaled_val(bw_with_overhead));
}