From d49cf5d4b33cdefaa113ec88d83ac832de179554 Mon Sep 17 00:00:00 2001
From: rasky <rasky@38d2e660-2303-0410-9eaa-f027e97ec537>
Date: Tue, 28 Sep 2010 18:36:03 +0000
Subject: [PATCH] SEC: add function to benchmark a PRNG.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@4339 38d2e660-2303-0410-9eaa-f027e97ec537
---
 bertos/sec/benchmarks.c | 27 +++++++++++++++++++++++++--
 bertos/sec/benchmarks.h |  2 ++
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/bertos/sec/benchmarks.c b/bertos/sec/benchmarks.c
index f5fbd79b..afe72751 100644
--- a/bertos/sec/benchmarks.c
+++ b/bertos/sec/benchmarks.c
@@ -3,11 +3,11 @@
 #include <drv/timer.h>
 #include <string.h>
 
+static uint8_t buf[512];
+
 void hash_benchmark(Hash *h, const char *hname, int numk)
 {
-	static uint8_t buf[512];
 	memset(buf, 0x12, sizeof(buf));
-
 	ticks_t t = timer_clock();
 
 	for (int j=0;j<64;++j) {
@@ -22,3 +22,26 @@ void hash_benchmark(Hash *h, const char *hname, int numk)
 	utime_t usec = ticks_to_us(t) / 64;
 	kprintf("%s @ %ldMhz: %s of %dKiB of data: %lu.%lu ms\n", CPU_CORE_NAME, CPU_FREQ/1000000, hname, numk, (usec/1000), (usec % 1000));
 }
+
+void prng_benchmark(PRNG *prng, const char *hname, int numbytes)
+{
+	memset(buf, 0x12, sizeof(buf));
+
+	ASSERT(sizeof(buf) >= prng_seed_len(prng));
+	prng_reseed(prng, buf);
+
+	ticks_t t = timer_clock();
+
+	for (int j=0;j<2048;++j) {
+		for (int i=0; i<(numbytes+511)/512-1; ++i)
+			prng_generate(prng, buf, 512);
+		prng_generate(prng, buf, numbytes%512);
+	}
+
+	t = timer_clock() - t;
+
+	utime_t usec = ticks_to_us(t) / 2048;
+	kprintf("%s @ %ldMhz: %s generation of %d random bytes: %lu.%lu ms\n", CPU_CORE_NAME, CPU_FREQ/1000000, hname, numbytes, (usec/1000), (usec % 1000));
+	kprintf("Sample of random data:\n");
+	kdump(buf, MIN(numbytes, 64));
+}
diff --git a/bertos/sec/benchmarks.h b/bertos/sec/benchmarks.h
index e6fc789a..47f45ffe 100644
--- a/bertos/sec/benchmarks.h
+++ b/bertos/sec/benchmarks.h
@@ -2,7 +2,9 @@
 #define SEC_BENCHMARKS_H
 
 #include <sec/hash.h>
+#include <sec/prng.h>
 
 void hash_benchmark(Hash *h, const char *hname, int numk);
+void prng_benchmark(PRNG *prng, const char *hname, int numk);
 
 #endif /* SEC_BENCHMARKS_H */
-- 
2.25.1