Changeset 22006 in vbox

Timestamp:

Aug 5, 2009 6:41:29 PM (15 years ago)

Author:

vboxsync

Message:

tstCompressionBenchmark: More tests.

File:

• trunk/src/VBox/VMM/testcase/tstCompressionBenchmark.cpp (modified) (6 diffs)

trunk/src/VBox/VMM/testcase/tstCompressionBenchmark.cpp

@@ -24 +24 @@
 *   Header Files                                                               *
 *******************************************************************************/
+#include <iprt/asm.h>
 #include <iprt/assert.h>
 #include <iprt/crc.h>
@@ -264 +265 @@
 
     g_pabDecompr = (uint8_t *)RTMemAlloc(g_cbPages);
-    g_cbComprAlloc = g_cbPages * 2;
+    g_cbComprAlloc = RT_MAX(g_cbPages * 2, 256 * PAGE_SIZE);
     g_pabCompr   = (uint8_t *)RTMemAlloc(g_cbComprAlloc);
     if (!g_pabSrc || !g_pabDecompr || !g_pabCompr)
@@ -309 +310 @@
             if (RT_FAILURE(aTests[j].rc))
                 continue;
-            memset(g_pabCompr,   0, g_cbComprAlloc);
-            memset(g_pabDecompr, 0, g_cbPages);
+            memset(g_pabCompr,   0xaa, g_cbComprAlloc);
+            memset(g_pabDecompr, 0xcc, g_cbPages);
             g_cbCompr = 0;
             g_offComprIn = 0;
@@ -318 +319 @@
              * Compress it.
              */
-            uint64_t        NanoTS    = RTTimeNanoTS();
+            uint64_t NanoTS = RTTimeNanoTS();
             if (aTests[j].fBlock)
             {
@@ -326 +327 @@
                 for (size_t iPage = 0; iPage < g_cPages; iPage += cPagesAtATime)
                 {
-                    AssertBreakStmt(cbLeft > PAGE_SIZE * 4, rc = VERR_BUFFER_OVERFLOW);
+                    AssertBreakStmt(cbLeft > PAGE_SIZE * 4, aTests[j].rc = rc = VERR_BUFFER_OVERFLOW);
                     uint32_t *pcb = (uint32_t *)pbDstPage;
                     pbDstPage    += sizeof(uint32_t);
@@ -506 +507 @@
 
     /*
+     * Count zero pages in the data set.
+     */
+    size_t cZeroPages = 0;
+    for (size_t iPage = 0; iPage < g_cPages; iPage++)
+    {
+        if (!ASMMemIsAllU32(&g_pabSrc[iPage * PAGE_SIZE], PAGE_SIZE, 0))
+            cZeroPages++;
+    }
+    RTPrintf("       %'10zu zero pages (%u %%)\n", cZeroPages, cZeroPages * 100 / g_cPages);
+
+    /*
      * A little extension to the test, benchmark relevant CRCs.
      */