mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2024-12-29 01:03:32 +00:00
359 lines
14 KiB
C
359 lines
14 KiB
C
|
/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
|
||
|
|
/*
|
||
|
|
****************************************************************************
|
||
|
|
*
|
||
|
|
* "DHRYSTONE" Benchmark Program
|
||
|
|
* -----------------------------
|
||
|
|
*
|
||
|
|
* Version: C, Version 2.1
|
||
|
|
*
|
||
|
|
* File: dhry.h (part 1 of 3)
|
||
|
|
*
|
||
|
|
* Date: May 25, 1988
|
||
|
|
*
|
||
|
|
* Author: Reinhold P. Weicker
|
||
|
|
* Siemens AG, AUT E 51
|
||
|
|
* Postfach 3220
|
||
|
|
* 8520 Erlangen
|
||
|
|
* Germany (West)
|
||
|
|
* Phone: [+49]-9131-7-20330
|
||
|
|
* (8-17 Central European Time)
|
||
|
|
* Usenet: ..!mcsun!unido!estevax!weicker
|
||
|
|
*
|
||
|
|
* Original Version (in Ada) published in
|
||
|
|
* "Communications of the ACM" vol. 27., no. 10 (Oct. 1984),
|
||
|
|
* pp. 1013 - 1030, together with the statistics
|
||
|
|
* on which the distribution of statements etc. is based.
|
||
|
|
*
|
||
|
|
* In this C version, the following C library functions are used:
|
||
|
|
* - strcpy, strcmp (inside the measurement loop)
|
||
|
|
* - printf, scanf (outside the measurement loop)
|
||
|
|
* In addition, Berkeley UNIX system calls "times ()" or "time ()"
|
||
|
|
* are used for execution time measurement. For measurements
|
||
|
|
* on other systems, these calls have to be changed.
|
||
|
|
*
|
||
|
|
* Collection of Results:
|
||
|
|
* Reinhold Weicker (address see above) and
|
||
|
|
*
|
||
|
|
* Rick Richardson
|
||
|
|
* PC Research. Inc.
|
||
|
|
* 94 Apple Orchard Drive
|
||
|
|
* Tinton Falls, NJ 07724
|
||
|
|
* Phone: (201) 389-8963 (9-17 EST)
|
||
|
|
* Usenet: ...!uunet!pcrat!rick
|
||
|
|
*
|
||
|
|
* Please send results to Rick Richardson and/or Reinhold Weicker.
|
||
|
|
* Complete information should be given on hardware and software used.
|
||
|
|
* Hardware information includes: Machine type, CPU, type and size
|
||
|
|
* of caches; for microprocessors: clock frequency, memory speed
|
||
|
|
* (number of wait states).
|
||
|
|
* Software information includes: Compiler (and runtime library)
|
||
|
|
* manufacturer and version, compilation switches, OS version.
|
||
|
|
* The Operating System version may give an indication about the
|
||
|
|
* compiler; Dhrystone itself performs no OS calls in the measurement loop.
|
||
|
|
*
|
||
|
|
* The complete output generated by the program should be mailed
|
||
|
|
* such that at least some checks for correctness can be made.
|
||
|
|
*
|
||
|
|
***************************************************************************
|
||
|
|
*
|
||
|
|
* History: This version C/2.1 has been made for two reasons:
|
||
|
|
*
|
||
|
|
* 1) There is an obvious need for a common C version of
|
||
|
|
* Dhrystone, since C is at present the most popular system
|
||
|
|
* programming language for the class of processors
|
||
|
|
* (microcomputers, minicomputers) where Dhrystone is used most.
|
||
|
|
* There should be, as far as possible, only one C version of
|
||
|
|
* Dhrystone such that results can be compared without
|
||
|
|
* restrictions. In the past, the C versions distributed
|
||
|
|
* by Rick Richardson (Version 1.1) and by Reinhold Weicker
|
||
|
|
* had small (though not significant) differences.
|
||
|
|
*
|
||
|
|
* 2) As far as it is possible without changes to the Dhrystone
|
||
|
|
* statistics, optimizing compilers should be prevented from
|
||
|
|
* removing significant statements.
|
||
|
|
*
|
||
|
|
* This C version has been developed in cooperation with
|
||
|
|
* Rick Richardson (Tinton Falls, NJ), it incorporates many
|
||
|
|
* ideas from the "Version 1.1" distributed previously by
|
||
|
|
* him over the UNIX network Usenet.
|
||
|
|
* I also thank Chaim Benedelac (National Semiconductor),
|
||
|
|
* David Ditzel (SUN), Earl Killian and John Mashey (MIPS),
|
||
|
|
* Alan Smith and Rafael Saavedra-Barrera (UC at Berkeley)
|
||
|
|
* for their help with comments on earlier versions of the
|
||
|
|
* benchmark.
|
||
|
|
*
|
||
|
|
* Changes: In the initialization part, this version follows mostly
|
||
|
|
* Rick Richardson's version distributed via Usenet, not the
|
||
|
|
* version distributed earlier via floppy disk by Reinhold Weicker.
|
||
|
|
* As a concession to older compilers, names have been made
|
||
|
|
* unique within the first 8 characters.
|
||
|
|
* Inside the measurement loop, this version follows the
|
||
|
|
* version previously distributed by Reinhold Weicker.
|
||
|
|
*
|
||
|
|
* At several places in the benchmark, code has been added,
|
||
|
|
* but within the measurement loop only in branches that
|
||
|
|
* are not executed. The intention is that optimizing compilers
|
||
|
|
* should be prevented from moving code out of the measurement
|
||
|
|
* loop, or from removing code altogether. Since the statements
|
||
|
|
* that are executed within the measurement loop have NOT been
|
||
|
|
* changed, the numbers defining the "Dhrystone distribution"
|
||
|
|
* (distribution of statements, operand types and locality)
|
||
|
|
* still hold. Except for sophisticated optimizing compilers,
|
||
|
|
* execution times for this version should be the same as
|
||
|
|
* for previous versions.
|
||
|
|
*
|
||
|
|
* Since it has proven difficult to subtract the time for the
|
||
|
|
* measurement loop overhead in a correct way, the loop check
|
||
|
|
* has been made a part of the benchmark. This does have
|
||
|
|
* an impact - though a very minor one - on the distribution
|
||
|
|
* statistics which have been updated for this version.
|
||
|
|
*
|
||
|
|
* All changes within the measurement loop are described
|
||
|
|
* and discussed in the companion paper "Rationale for
|
||
|
|
* Dhrystone version 2".
|
||
|
|
*
|
||
|
|
* Because of the self-imposed limitation that the order and
|
||
|
|
* distribution of the executed statements should not be
|
||
|
|
* changed, there are still cases where optimizing compilers
|
||
|
|
* may not generate code for some statements. To a certain
|
||
|
|
* degree, this is unavoidable for small synthetic benchmarks.
|
||
|
|
* Users of the benchmark are advised to check code listings
|
||
|
|
* whether code is generated for all statements of Dhrystone.
|
||
|
|
*
|
||
|
|
* Version 2.1 is identical to version 2.0 distributed via
|
||
|
|
* the UNIX network Usenet in March 1988 except that it corrects
|
||
|
|
* some minor deficiencies that were found by users of version 2.0.
|
||
|
|
* The only change within the measurement loop is that a
|
||
|
|
* non-executed "else" part was added to the "if" statement in
|
||
|
|
* Func_3, and a non-executed "else" part removed from Proc_3.
|
||
|
|
*
|
||
|
|
***************************************************************************
|
||
|
|
*
|
||
|
|
* Compilation model and measurement (IMPORTANT):
|
||
|
|
*
|
||
|
|
* This C version of Dhrystone consists of three files:
|
||
|
|
* - dhry.h (this file, containing global definitions and comments)
|
||
|
|
* - dhry_1.c (containing the code corresponding to Ada package Pack_1)
|
||
|
|
* - dhry_2.c (containing the code corresponding to Ada package Pack_2)
|
||
|
|
*
|
||
|
|
* The following "ground rules" apply for measurements:
|
||
|
|
* - Separate compilation
|
||
|
|
* - No procedure merging
|
||
|
|
* - Otherwise, compiler optimizations are allowed but should be indicated
|
||
|
|
* - Default results are those without register declarations
|
||
|
|
* See the companion paper "Rationale for Dhrystone Version 2" for a more
|
||
|
|
* detailed discussion of these ground rules.
|
||
|
|
*
|
||
|
|
* For 16-Bit processors (e.g. 80186, 80286), times for all compilation
|
||
|
|
* models ("small", "medium", "large" etc.) should be given if possible,
|
||
|
|
* together with a definition of these models for the compiler system used.
|
||
|
|
*
|
||
|
|
**************************************************************************
|
||
|
|
*
|
||
|
|
* Dhrystone (C version) statistics:
|
||
|
|
*
|
||
|
|
* [Comment from the first distribution, updated for version 2.
|
||
|
|
* Note that because of language differences, the numbers are slightly
|
||
|
|
* different from the Ada version.]
|
||
|
|
*
|
||
|
|
* The following program contains statements of a high level programming
|
||
|
|
* language (here: C) in a distribution considered representative:
|
||
|
|
*
|
||
|
|
* assignments 52 (51.0 %)
|
||
|
|
* control statements 33 (32.4 %)
|
||
|
|
* procedure, function calls 17 (16.7 %)
|
||
|
|
*
|
||
|
|
* 103 statements are dynamically executed. The program is balanced with
|
||
|
|
* respect to the three aspects:
|
||
|
|
*
|
||
|
|
* - statement type
|
||
|
|
* - operand type
|
||
|
|
* - operand locality
|
||
|
|
* operand global, local, parameter, or constant.
|
||
|
|
*
|
||
|
|
* The combination of these three aspects is balanced only approximately.
|
||
|
|
*
|
||
|
|
* 1. Statement Type:
|
||
|
|
* ----------------- number
|
||
|
|
*
|
||
|
|
* V1 = V2 9
|
||
|
|
* (incl. V1 = F(..)
|
||
|
|
* V = Constant 12
|
||
|
|
* Assignment, 7
|
||
|
|
* with array element
|
||
|
|
* Assignment, 6
|
||
|
|
* with record component
|
||
|
|
* --
|
||
|
|
* 34 34
|
||
|
|
*
|
||
|
|
* X = Y +|-|"&&"|"|" Z 5
|
||
|
|
* X = Y +|-|"==" Constant 6
|
||
|
|
* X = X +|- 1 3
|
||
|
|
* X = Y *|/ Z 2
|
||
|
|
* X = Expression, 1
|
||
|
|
* two operators
|
||
|
|
* X = Expression, 1
|
||
|
|
* three operators
|
||
|
|
* --
|
||
|
|
* 18 18
|
||
|
|
*
|
||
|
|
* if .... 14
|
||
|
|
* with "else" 7
|
||
|
|
* without "else" 7
|
||
|
|
* executed 3
|
||
|
|
* not executed 4
|
||
|
|
* for ... 7 | counted every time
|
||
|
|
* while ... 4 | the loop condition
|
||
|
|
* do ... while 1 | is evaluated
|
||
|
|
* switch ... 1
|
||
|
|
* break 1
|
||
|
|
* declaration with 1
|
||
|
|
* initialization
|
||
|
|
* --
|
||
|
|
* 34 34
|
||
|
|
*
|
||
|
|
* P (...) procedure call 11
|
||
|
|
* user procedure 10
|
||
|
|
* library procedure 1
|
||
|
|
* X = F (...)
|
||
|
|
* function call 6
|
||
|
|
* user function 5
|
||
|
|
* library function 1
|
||
|
|
* --
|
||
|
|
* 17 17
|
||
|
|
* ---
|
||
|
|
* 103
|
||
|
|
*
|
||
|
|
* The average number of parameters in procedure or function calls
|
||
|
|
* is 1.82 (not counting the function values as implicit parameters).
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* 2. Operators
|
||
|
|
* ------------
|
||
|
|
* number approximate
|
||
|
|
* percentage
|
||
|
|
*
|
||
|
|
* Arithmetic 32 50.8
|
||
|
|
*
|
||
|
|
* + 21 33.3
|
||
|
|
* - 7 11.1
|
||
|
|
* * 3 4.8
|
||
|
|
* / (int div) 1 1.6
|
||
|
|
*
|
||
|
|
* Comparison 27 42.8
|
||
|
|
*
|
||
|
|
* == 9 14.3
|
||
|
|
* /= 4 6.3
|
||
|
|
* > 1 1.6
|
||
|
|
* < 3 4.8
|
||
|
|
* >= 1 1.6
|
||
|
|
* <= 9 14.3
|
||
|
|
*
|
||
|
|
* Logic 4 6.3
|
||
|
|
*
|
||
|
|
* && (AND-THEN) 1 1.6
|
||
|
|
* | (OR) 1 1.6
|
||
|
|
* ! (NOT) 2 3.2
|
||
|
|
*
|
||
|
|
* -- -----
|
||
|
|
* 63 100.1
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* 3. Operand Type (counted once per operand reference):
|
||
|
|
* ---------------
|
||
|
|
* number approximate
|
||
|
|
* percentage
|
||
|
|
*
|
||
|
|
* Integer 175 72.3 %
|
||
|
|
* Character 45 18.6 %
|
||
|
|
* Pointer 12 5.0 %
|
||
|
|
* String30 6 2.5 %
|
||
|
|
* Array 2 0.8 %
|
||
|
|
* Record 2 0.8 %
|
||
|
|
* --- -------
|
||
|
|
* 242 100.0 %
|
||
|
|
*
|
||
|
|
* When there is an access path leading to the final operand (e.g. a record
|
||
|
|
* component), only the final data type on the access path is counted.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* 4. Operand Locality:
|
||
|
|
* -------------------
|
||
|
|
* number approximate
|
||
|
|
* percentage
|
||
|
|
*
|
||
|
|
* local variable 114 47.1 %
|
||
|
|
* global variable 22 9.1 %
|
||
|
|
* parameter 45 18.6 %
|
||
|
|
* value 23 9.5 %
|
||
|
|
* reference 22 9.1 %
|
||
|
|
* function result 6 2.5 %
|
||
|
|
* constant 55 22.7 %
|
||
|
|
* --- -------
|
||
|
|
* 242 100.0 %
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* The program does not compute anything meaningful, but it is syntactically
|
||
|
|
* and semantically correct. All variables have a value assigned to them
|
||
|
|
* before they are used as a source operand.
|
||
|
|
*
|
||
|
|
* There has been no explicit effort to account for the effects of a
|
||
|
|
* cache, or to balance the use of long or short displacements for code or
|
||
|
|
* data.
|
||
|
|
*
|
||
|
|
***************************************************************************
|
||
|
|
*/
|
||
|
|
|
||
|
|
typedef enum {
|
||
|
|
Ident_1,
|
||
|
|
Ident_2,
|
||
|
|
Ident_3,
|
||
|
|
Ident_4,
|
||
|
|
Ident_5
|
||
|
|
} Enumeration; /* for boolean and enumeration types in Ada, Pascal */
|
||
|
|
|
||
|
|
/* General definitions: */
|
||
|
|
|
||
|
|
typedef int One_Thirty;
|
||
|
|
typedef int One_Fifty;
|
||
|
|
typedef char Capital_Letter;
|
||
|
|
typedef int Boolean;
|
||
|
|
typedef char Str_30[31];
|
||
|
|
typedef int Arr_1_Dim[50];
|
||
|
|
typedef int Arr_2_Dim[50][50];
|
||
|
|
|
||
|
|
typedef struct record {
|
||
|
|
struct record *Ptr_Comp;
|
||
|
|
Enumeration Discr;
|
||
|
|
union {
|
||
|
|
struct {
|
||
|
|
Enumeration Enum_Comp;
|
||
|
|
int Int_Comp;
|
||
|
|
char Str_Comp[31];
|
||
|
|
} var_1;
|
||
|
|
struct {
|
||
|
|
Enumeration E_Comp_2;
|
||
|
|
char Str_2_Comp[31];
|
||
|
|
} var_2;
|
||
|
|
struct {
|
||
|
|
char Ch_1_Comp;
|
||
|
|
char Ch_2_Comp;
|
||
|
|
} var_3;
|
||
|
|
} variant;
|
||
|
|
} Rec_Type, *Rec_Pointer;
|
||
|
|
|
||
|
|
|
||
|
|
extern int Int_Glob;
|
||
|
|
extern char Ch_1_Glob;
|
||
|
|
|
||
|
|
void Proc_6(Enumeration Enum_Val_Par, Enumeration *Enum_Ref_Par);
|
||
|
|
void Proc_7(One_Fifty Int_1_Par_Val, One_Fifty Int_2_Par_Val,
|
||
|
|
One_Fifty *Int_Par_Ref);
|
||
|
|
void Proc_8(Arr_1_Dim Arr_1_Par_Ref, Arr_2_Dim Arr_2_Par_Ref,
|
||
|
|
int Int_1_Par_Val, int Int_2_Par_Val);
|
||
|
|
Enumeration Func_1(Capital_Letter Ch_1_Par_Val, Capital_Letter Ch_2_Par_Val);
|
||
|
|
Boolean Func_2(Str_30 Str_1_Par_Ref, Str_30 Str_2_Par_Ref);
|
||
|
|
|
||
|
|
int dhry(int n);
|