[cadcdev-svn-commits] [SCM] branch master updated. v2.0.0-653-g9db7883

[ljsebald <ljs...@us...>]

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      from  da62e62955d2edad42c218257a50da10aff59f56 (commit)

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- Log -----------------------------------------------------------------
commit 9db78833f9f1228318f42b6ef1bd97593273f48c
Author: Andress Barajas <and...@gm...>
Date:   Sat Feb 11 17:57:06 2023 -0800

    Updated speed test to calculate the average (#105)

-----------------------------------------------------------------------

Summary of changes:
 examples/dreamcast/sd/speedtest/sd-speedtest.c | 27 ++++++++++++++++----------
 1 file changed, 17 insertions(+), 10 deletions(-)

diff --git a/examples/dreamcast/sd/speedtest/sd-speedtest.c b/examples/dreamcast/sd/speedtest/sd-speedtest.c
index edca977..593acac 100644
--- a/examples/dreamcast/sd/speedtest/sd-speedtest.c
+++ b/examples/dreamcast/sd/speedtest/sd-speedtest.c
@@ -50,8 +50,10 @@ static void __attribute__((__noreturn__)) wait_exit() {
 
 int main(int argc, char *argv[]) {
     kos_blockdev_t sd_dev;
-    uint64 begin, end, timer;
+    uint64 begin, end, timer, average;
+    uint64 sum = 0;
     uint8_t pt;
+    int i;
 
     dbgio_dev_select("fb");
     dbglog(DBG_DEBUG, "Initializing SD card.\n");
@@ -69,20 +71,25 @@ int main(int argc, char *argv[]) {
         wait_exit();
     }
 
-    dbglog(DBG_DEBUG, "Reading 1024 blocks.\n");
+    dbglog(DBG_DEBUG, "Calculating average speed for reading 1024 blocks.\n");
 
-    begin = timer_ms_gettime64();
+    for(i = 0; i < 10; i++) {
+        begin = timer_ms_gettime64();
 
-    if(sd_dev.read_blocks(&sd_dev, 0, 1024, tbuf)) {
-        dbglog(DBG_DEBUG, "couldn't read block: %s\n", strerror(errno));
-        return -1;
+        if(sd_dev.read_blocks(&sd_dev, 0, 1024, tbuf)) {
+            dbglog(DBG_DEBUG, "couldn't read block: %s\n", strerror(errno));
+            return -1;
+        }
+
+        end = timer_ms_gettime64();
+        timer = end - begin;
+        sum += timer;
     }
 
-    end = timer_ms_gettime64();
-    timer = end - begin;
+    average = sum / 10;
 
-    dbglog(DBG_DEBUG, "SD card read took %llu ms (%.3f KB/sec)\n",
-        timer, (512 * 1024) / ((double)timer));
+    dbglog(DBG_DEBUG, "SD card read average took %llu ms (%.3f KB/sec)\n",
+           average, (512 * 1024) / ((double)average));
 
     sd_shutdown();
     wait_exit();


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A pseudo Operating System for the Dreamcast.