Merge pull request #25 from zoharbmellanox/master

Explain Gb/s to MB/s conversion.
linux-rdma · Mar 11, 2018 · 130b395 · 130b395
2 parents e950fa1 + 1f5a0b5
commit 130b395
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/src/perftest_parameters.c b/src/perftest_parameters.c
@@ -433,6 +433,8 @@ static void usage(const char *argv0, VerbType verb, TestType tst, int connection
 
 		printf("      --report_gbits ");
 		printf(" Report Max/Average BW of test in Gbit/sec (instead of MB/sec)\n");
+		printf("        Note: MB=2^20 byte, while Gb=10^9 bits. Use these formulas for conversion:\n");
+		printf("        Factor=10^9/(20^2*8)=119.2; MB=Gb_result * factor; Gb=MB_result / factor\n");
 
 		if (connection_type != RawEth) {
 			printf("      --report-per-port ");
@@ -494,12 +496,12 @@ static void usage(const char *argv0, VerbType verb, TestType tst, int connection
 
 		printf("      --rate_units=<units>");
 		printf(" [Mgp] Set the units for rate limit to MBps (M), Gbps (g) or pps (p). default is Gbps (g).\n");
-		printf("      Note (1): pps not supported with HW limit.\n");
-		printf("      Note (2): When using PP rate_units is forced to Kbps.\n");
+		printf("        Note (1): pps not supported with HW limit.\n");
+		printf("        Note (2): When using PP rate_units is forced to Kbps.\n");
 
 		printf("      --rate_limit_type=<type>");
 		printf(" [HW/SW/PP] Limit the QP's by HW, PP or by SW. Disabled by default. When rate_limit Not is specified HW limit is Default.\n");
-		printf("      Note (1) in Latency under load test SW rate limit is forced\n");
+		printf("        Note: in Latency under load test SW rate limit is forced\n");
 
 	}
 	#if defined HAVE_OOO_ATTR || defined HAVE_EXP_OOO_ATTR