Changeset 53195 in vbox for trunk/src/VBox/ValidationKit

Timestamp:

Nov 4, 2014 12:44:27 PM (10 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

96741

Message:

src/ValidationKit/bootsector: Added RDTSC benchmark and improved precision a little while calculating ins/sec.

Location:

trunk/src/VBox/ValidationKit/bootsectors

Files:

• bootsector2-common-routines-template-1.mac (modified) (2 diffs)
• bootsector2-test1-template.mac (modified) (1 diff)
• bootsector2-test1.asm (modified) (3 diffs)

trunk/src/VBox/ValidationKit/bootsectors/bootsector2-common-routines-template-1.mac

@@ -1191 +1191 @@
         jae     .div_overflow
         mov     eax, [sAX]
+        shld    edx, eax, 10
+        shl     eax,10
         div     ecx                     ; eax = NS per test
 
@@ -1197 +1199 @@
         cmp     ecx, 0
         jz      .div_zero
-        xor     edx, edx
-        mov     eax, 1000000000         ; 1G
+        mov     edx, 0xee
+        mov     eax, 0x6b280000         ; 1024G
         div     ecx                     ; eax = tests per second
 

trunk/src/VBox/ValidationKit/bootsectors/bootsector2-test1-template.mac

@@ -92 +92 @@
         db TMPL_MODE_STR, ', CPUID', 0
 ENDPROC TMPL_NM(BenchmarkCpuId_rm)
+
+TMPL_BEGINCODE
+BITS TMPL_BITS
+
+
+;;
+; Run the RDTSC benchmark for this mode.
+;
+; @uses nothing
+;
+BEGINCODELOW
+BITS 16
+BEGINPROC TMPL_NM(BenchmarkRdTsc_rm)
+        call    TMPL_NM(Bs2IsModeSupported_rm)
+        jz      .done
+        call    TMPL_NM(Bs2EnterMode_rm)
+BITS TMPL_BITS
+        push    xBP
+        mov     xBP, xSP
+        push    sAX
+        push    sBX
+        push    sCX
+        push    sDX
+        push    sDI
+        sub     sSP, 20h
+
+        ; Get the current time.
+        mov     xAX, xSP
+        call    TMPL_NM_CMN(GetNanoTS)
+
+        ; Do the test.
+        mov     edi, TEST_INSTRUCTION_COUNT_RDTSC / 4
+.again:
+        rdtsc
+        rdtsc
+        rdtsc
+        rdtsc
+        dec     edi
+        jnz     .again
+
+        ; Calc the elapsed time and report the result.
+        mov     xAX, xSP
+        call    TMPL_NM_CMN(GetElapsedNanoTS)
+
+        mov     xCX, .s_szTestName
+        mov     edx, TEST_INSTRUCTION_COUNT_RDTSC
+        mov     xAX, xSP
+        call    TMPL_NM_CMN(ReportResult)
+
+        add     sSP, 20h
+        pop     sDI
+        pop     sDX
+        pop     sCX
+        pop     sBX
+        pop     sAX
+        leave
+
+        call    TMPL_NM(Bs2ExitMode)
+BITS 16
+.done:
+        ret
+
+.s_szTestName:
+        db TMPL_MODE_STR, ', RDTSC', 0
+ENDPROC TMPL_NM(BenchmarkRdTsc_rm)
 
 TMPL_BEGINCODE

trunk/src/VBox/ValidationKit/bootsectors/bootsector2-test1.asm

@@ -34 +34 @@
 ;; The number of instructions to test.
 %define TEST_INSTRUCTION_COUNT_IO       2000000
+
+;; The number of RDTSC instructions to test.
+%define TEST_INSTRUCTION_COUNT_RDTSC    4000000
 
 ;; The number of instructions to test.
@@ -78 +81 @@
 
         ;
+        ; RDTSC.
+        ;
+        mov     ax, .s_szTstRdTsc
+        call    TestSub_r86
+        call    BenchmarkRdTsc_rm_pp32
+        call    BenchmarkRdTsc_rm_pae32
+        call    BenchmarkRdTsc_rm_lm64
+        call    BenchmarkRdTsc_rm_pe16
+        call    BenchmarkRdTsc_rm_pe32
+        call    BenchmarkRdTsc_rm_rm
+
+        ;
         ; I/O port access.
         ;
@@ -111 +126 @@
 .s_szTstCpuId:
         db      'CPUID EAX=1', 0
+.s_szTstRdTsc:
+        db      'RDTSC', 0
 .s_szTstNopIoPort:
         db      'NOP I/O Port Access', 0