diff options
| -rw-r--r-- | lib/Kconfig.debug | 35 | ||||
| -rw-r--r-- | lib/Makefile | 2 | ||||
| -rw-r--r-- | lib/dhry.h | 358 | ||||
| -rw-r--r-- | lib/dhry_1.c | 283 | ||||
| -rw-r--r-- | lib/dhry_2.c | 175 | ||||
| -rw-r--r-- | lib/dhry_run.c | 85 |
6 files changed, 938 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 881c3f84e88a..918bda4ee120 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2079,6 +2079,41 @@ menuconfig RUNTIME_TESTING_MENU if RUNTIME_TESTING_MENU +config TEST_DHRY + tristate "Dhrystone benchmark test" + help + Enable this to include the Dhrystone 2.1 benchmark. This test + calculates the number of Dhrystones per second, and the number of + DMIPS (Dhrystone MIPS) obtained when the Dhrystone score is divided + by 1757 (the number of Dhrystones per second obtained on the VAX + 11/780, nominally a 1 MIPS machine). + + To run the benchmark, it needs to be enabled explicitly, either from + the kernel command line (when built-in), or from userspace (when + built-in or modular. + + Run once during kernel boot: + + test_dhry.run + + Set number of iterations from kernel command line: + + test_dhry.iterations=<n> + + Set number of iterations from userspace: + + echo <n> > /sys/module/test_dhry/parameters/iterations + + Trigger manual run from userspace: + + echo y > /sys/module/test_dhry/parameters/run + + If the number of iterations is <= 0, the test will devise a suitable + number of iterations (test runs for at least 2s) automatically. + This process takes ca. 4s. + + If unsure, say N. + config LKDTM tristate "Linux Kernel Dump Test Tool Module" depends on DEBUG_FS diff --git a/lib/Makefile b/lib/Makefile index 4d9461bfea42..06b9dcd80cda 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -57,6 +57,8 @@ obj-$(CONFIG_TEST_HEXDUMP) += test_hexdump.o obj-y += kstrtox.o obj-$(CONFIG_FIND_BIT_BENCHMARK) += find_bit_benchmark.o obj-$(CONFIG_TEST_BPF) += test_bpf.o +test_dhry-objs := dhry_1.o dhry_2.o dhry_run.o +obj-$(CONFIG_TEST_DHRY) += test_dhry.o obj-$(CONFIG_TEST_FIRMWARE) += test_firmware.o obj-$(CONFIG_TEST_BITOPS) += test_bitops.o CFLAGS_test_bitops.o += -Werror diff --git a/lib/dhry.h b/lib/dhry.h new file mode 100644 index 000000000000..e1a4db8e252c --- /dev/null +++ b/lib/dhry.h @@ -0,0 +1,358 @@ +/* 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); diff --git a/lib/dhry_1.c b/lib/dhry_1.c new file mode 100644 index 000000000000..83247106824c --- /dev/null +++ b/lib/dhry_1.c @@ -0,0 +1,283 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +/* + **************************************************************************** + * + * "DHRYSTONE" Benchmark Program + * ----------------------------- + * + * Version: C, Version 2.1 + * + * File: dhry_1.c (part 2 of 3) + * + * Date: May 25, 1988 + * + * Author: Reinhold P. Weicker + * + **************************************************************************** + */ + +#include "dhry.h" + +#include <linux/ktime.h> +#include <linux/slab.h> +#include <linux/string.h> + +/* Global Variables: */ + +int Int_Glob; +char Ch_1_Glob; + +static Rec_Pointer Ptr_Glob, Next_Ptr_Glob; +static Boolean Bool_Glob; +static char Ch_2_Glob; +static int Arr_1_Glob[50]; +static int Arr_2_Glob[50][50]; + +static void Proc_3(Rec_Pointer *Ptr_Ref_Par) +/******************/ +/* executed once */ +/* Ptr_Ref_Par becomes Ptr_Glob */ +{ + if (Ptr_Glob) { + /* then, executed */ + *Ptr_Ref_Par = Ptr_Glob->Ptr_Comp; + } + Proc_7(10, Int_Glob, &Ptr_Glob->variant.var_1.Int_Comp); +} /* Proc_3 */ + + +static void Proc_1(Rec_Pointer Ptr_Val_Par) +/******************/ +/* executed once */ +{ + Rec_Pointer Next_Record = Ptr_Val_Par->Ptr_Comp; + /* == Ptr_Glob_Next */ + /* Local variable, initialized with Ptr_Val_Par->Ptr_Comp, */ + /* corresponds to "rename" in Ada, "with" in Pascal */ + + *Ptr_Val_Par->Ptr_Comp = *Ptr_Glob; + Ptr_Val_Par->variant.var_1.Int_Comp = 5; + Next_Record->variant.var_1.Int_Comp = + Ptr_Val_Par->variant.var_1.Int_Comp; + Next_Record->Ptr_Comp = Ptr_Val_Par->Ptr_Comp; + Proc_3(&Next_Record->Ptr_Comp); + /* Ptr_Val_Par->Ptr_Comp->Ptr_Comp == Ptr_Glob->Ptr_Comp */ + if (Next_Record->Discr == Ident_1) { + /* then, executed */ + Next_Record->variant.var_1.Int_Comp = 6; + Proc_6(Ptr_Val_Par->variant.var_1.Enum_Comp, + &Next_Record->variant.var_1.Enum_Comp); + Next_Record->Ptr_Comp = Ptr_Glob->Ptr_Comp; + Proc_7(Next_Record->variant.var_1.Int_Comp, 10, + &Next_Record->variant.var_1.Int_Comp); + } else { + /* not executed */ + *Ptr_Val_Par = *Ptr_Val_Par->Ptr_Comp; + } +} /* Proc_1 */ + + +static void Proc_2(One_Fifty *Int_Par_Ref) +/******************/ +/* executed once */ +/* *Int_Par_Ref == 1, becomes 4 */ +{ + One_Fifty Int_Loc; + Enumeration Enum_Loc; + + Int_Loc = *Int_Par_Ref + 10; + do { + /* executed once */ + if (Ch_1_Glob == 'A') { + /* then, executed */ + Int_Loc -= 1; + *Int_Par_Ref = Int_Loc - Int_Glob; + Enum_Loc = Ident_1; + } /* if */ + } while (Enum_Loc != Ident_1); /* true */ +} /* Proc_2 */ + + +static void Proc_4(void) +/*******/ +/* executed once */ +{ + Boolean Bool_Loc; + + Bool_Loc = Ch_1_Glob == 'A'; + Bool_Glob = Bool_Loc | Bool_Glob; + Ch_2_Glob = 'B'; +} /* Proc_4 */ + + +static void Proc_5(void) +/*******/ +/* executed once */ +{ + Ch_1_Glob = 'A'; + Bool_Glob = false; +} /* Proc_5 */ + + +int dhry(int n) +/*****/ + + /* main program, corresponds to procedures */ + /* Main and Proc_0 in the Ada version */ +{ + One_Fifty Int_1_Loc; + One_Fifty Int_2_Loc; + One_Fifty Int_3_Loc; + char Ch_Index; + Enumeration Enum_Loc; + Str_30 Str_1_Loc; + Str_30 Str_2_Loc; + int Run_Index; + int Number_Of_Runs; + ktime_t Begin_Time, End_Time; + u32 User_Time; + + /* Initializations */ + + Next_Ptr_Glob = (Rec_Pointer)kzalloc(sizeof(Rec_Type), GFP_KERNEL); + Ptr_Glob = (Rec_Pointer)kzalloc(sizeof(Rec_Type), GFP_KERNEL); + + Ptr_Glob->Ptr_Comp = Next_Ptr_Glob; + Ptr_Glob->Discr = Ident_1; + Ptr_Glob->variant.var_1.Enum_Comp = Ident_3; + Ptr_Glob->variant.var_1.Int_Comp = 40; + strcpy(Ptr_Glob->variant.var_1.Str_Comp, + "DHRYSTONE PROGRAM, SOME STRING"); + strcpy(Str_1_Loc, "DHRYSTONE PROGRAM, 1'ST STRING"); + + Arr_2_Glob[8][7] = 10; + /* Was missing in published program. Without this statement, */ + /* Arr_2_Glob[8][7] would have an undefined value. */ + /* Warning: With 16-Bit processors and Number_Of_Runs > 32000, */ + /* overflow may occur for this array element. */ + + pr_debug("Dhrystone Benchmark, Version 2.1 (Language: C)\n"); + + Number_Of_Runs = n; + + pr_debug("Execution starts, %d runs through Dhrystone\n", + Number_Of_Runs); + + /***************/ + /* Start timer */ + /***************/ + + Begin_Time = ktime_get(); + + for (Run_Index = 1; Run_Index <= Number_Of_Runs; ++Run_Index) { + Proc_5(); + Proc_4(); + /* Ch_1_Glob == 'A', Ch_2_Glob == 'B', Bool_Glob == true */ + Int_1_Loc = 2; + Int_2_Loc = 3; + strcpy(Str_2_Loc, "DHRYSTONE PROGRAM, 2'ND STRING"); + Enum_Loc = Ident_2; + Bool_Glob = !Func_2(Str_1_Loc, Str_2_Loc); + /* Bool_Glob == 1 */ + while (Int_1_Loc < Int_2_Loc) { + /* loop body executed once */ + Int_3_Loc = 5 * Int_1_Loc - Int_2_Loc; + /* Int_3_Loc == 7 */ + Proc_7(Int_1_Loc, Int_2_Loc, &Int_3_Loc); + /* Int_3_Loc == 7 */ + Int_1_Loc += 1; + } /* while */ + /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */ + Proc_8(Arr_1_Glob, Arr_2_Glob, Int_1_Loc, Int_3_Loc); + /* Int_Glob == 5 */ + Proc_1(Ptr_Glob); + for (Ch_Index = 'A'; Ch_Index <= Ch_2_Glob; ++Ch_Index) { + /* loop body executed twice */ + if (Enum_Loc == Func_1(Ch_Index, 'C')) { + /* then, not executed */ + Proc_6(Ident_1, &Enum_Loc); + strcpy(Str_2_Loc, "DHRYSTONE PROGRAM, 3'RD STRING"); + Int_2_Loc = Run_Index; + Int_Glob = Run_Index; + } + } + /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */ + Int_2_Loc = Int_2_Loc * Int_1_Loc; + Int_1_Loc = Int_2_Loc / Int_3_Loc; + Int_2_Loc = 7 * (Int_2_Loc - Int_3_Loc) - Int_1_Loc; + /* Int_1_Loc == 1, Int_2_Loc == 13, Int_3_Loc == 7 */ + Proc_2(&Int_1_Loc); + /* Int_1_Loc == 5 */ + + } /* loop "for Run_Index" */ + + /**************/ + /* Stop timer */ + /**************/ + + End_Time = ktime_get(); + +#define dhry_assert_int_eq(val, expected) \ + if (val != expected) \ + pr_err("%s: %d (FAIL, expected %d)\n", #val, val, \ + expected); \ + else \ + pr_debug("%s: %d (OK)\n", #val, val) + +#define dhry_assert_char_eq(val, expected) \ + if (val != expected) \ + pr_err("%s: %c (FAIL, expected %c)\n", #val, val, \ + expected); \ + else \ + pr_debug("%s: %c (OK)\n", #val, val) + +#define dhry_assert_string_eq(val, expected) \ + if (strcmp(val, expected)) \ + pr_err("%s: %s (FAIL, expected %s)\n", #val, val, \ + expected); \ + else \ + pr_debug("%s: %s (OK)\n", #val, val) + + pr_debug("Execution ends\n"); + pr_debug("Final values of the variables used in the benchmark:\n"); + dhry_assert_int_eq(Int_Glob, 5); + dhry_assert_int_eq(Bool_Glob, 1); + dhry_assert_char_eq(Ch_1_Glob, 'A'); + dhry_assert_char_eq(Ch_2_Glob, 'B'); + dhry_assert_int_eq(Arr_1_Glob[8], 7); + dhry_assert_int_eq(Arr_2_Glob[8][7], Number_Of_Runs + 10); + pr_debug("Ptr_Comp: %px\n", Ptr_Glob->Ptr_Comp); + dhry_assert_int_eq(Ptr_Glob->Discr, 0); + dhry_assert_int_eq(Ptr_Glob->variant.var_1.Enum_Comp, 2); + dhry_assert_int_eq(Ptr_Glob->variant.var_1.Int_Comp, 17); + dhry_assert_string_eq(Ptr_Glob->variant.var_1.Str_Comp, + "DHRYSTONE PROGRAM, SOME STRING"); + if (Next_Ptr_Glob->Ptr_Comp != Ptr_Glob->Ptr_Comp) + pr_err("Next_Ptr_Glob->Ptr_Comp: %px (expected %px)\n", + Next_Ptr_Glob->Ptr_Comp, Ptr_Glob->Ptr_Comp); + else + pr_debug("Next_Ptr_Glob->Ptr_Comp: %px\n", + Next_Ptr_Glob->Ptr_Comp); + dhry_assert_int_eq(Next_Ptr_Glob->Discr, 0); + dhry_assert_int_eq(Next_Ptr_Glob->variant.var_1.Enum_Comp, 1); + dhry_assert_int_eq(Next_Ptr_Glob->variant.var_1.Int_Comp, 18); + dhry_assert_string_eq(Next_Ptr_Glob->variant.var_1.Str_Comp, + "DHRYSTONE PROGRAM, SOME STRING"); + dhry_assert_int_eq(Int_1_Loc, 5); + dhry_assert_int_eq(Int_2_Loc, 13); + dhry_assert_int_eq(Int_3_Loc, 7); + dhry_assert_int_eq(Enum_Loc, 1); + dhry_assert_string_eq(Str_1_Loc, "DHRYSTONE PROGRAM, 1'ST STRING"); + dhry_assert_string_eq(Str_2_Loc, "DHRYSTONE PROGRAM, 2'ND STRING"); + + User_Time = ktime_to_ms(ktime_sub(End_Time, Begin_Time)); + + kfree(Ptr_Glob); + kfree(Next_Ptr_Glob); + + /* Measurements should last at least 2 seconds */ + if (User_Time < 2 * MSEC_PER_SEC) + return -EAGAIN; + + return div_u64(mul_u32_u32(MSEC_PER_SEC, Number_Of_Runs), User_Time); +} diff --git a/lib/dhry_2.c b/lib/dhry_2.c new file mode 100644 index 000000000000..c19e661f37d3 --- /dev/null +++ b/lib/dhry_2.c @@ -0,0 +1,175 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +/* + **************************************************************************** + * + * "DHRYSTONE" Benchmark Program + * ----------------------------- + * + * Version: C, Version 2.1 + * + * File: dhry_2.c (part 3 of 3) + * + * Date: May 25, 1988 + * + * Author: Reinhold P. Weicker + * + **************************************************************************** + */ + +#include "dhry.h" + +#include <linux/string.h> + + +static Boolean Func_3(Enumeration Enum_Par_Val) +/***************************/ +/* executed once */ +/* Enum_Par_Val == Ident_3 */ +{ + Enumeration Enum_Loc; + + Enum_Loc = Enum_Par_Val; + if (Enum_Loc == Ident_3) { + /* then, executed */ + return true; + } else { + /* not executed */ + return false; + } +} /* Func_3 */ + + +void Proc_6(Enumeration Enum_Val_Par, Enumeration *Enum_Ref_Par) +/*********************************/ +/* executed once */ +/* Enum_Val_Par == Ident_3, Enum_Ref_Par becomes Ident_2 */ +{ + *Enum_Ref_Par = Enum_Val_Par; + if (!Func_3(Enum_Val_Par)) { + /* then, not executed */ + *Enum_Ref_Par = Ident_4; + } + switch (Enum_Val_Par) { + case Ident_1: + *Enum_Ref_Par = Ident_1; + break; + case Ident_2: + if (Int_Glob > 100) { + /* then */ + *Enum_Ref_Par = Ident_1; + } else { + *Enum_Ref_Par = Ident_4; + } + break; + case Ident_3: /* executed */ + *Enum_Ref_Par = Ident_2; + break; + case Ident_4: + break; + case Ident_5: + *Enum_Ref_Par = Ident_3; + break; + } /* switch */ +} /* Proc_6 */ + + +void Proc_7(One_Fifty Int_1_Par_Val, One_Fifty Int_2_Par_Val, One_Fifty *Int_Par_Ref) +/**********************************************/ +/* executed three times */ +/* first call: Int_1_Par_Val == 2, Int_2_Par_Val == 3, */ +/* Int_Par_Ref becomes 7 */ +/* second call: Int_1_Par_Val == 10, Int_2_Par_Val == 5, */ +/* Int_Par_Ref becomes 17 */ +/* third call: Int_1_Par_Val == 6, Int_2_Par_Val == 10, */ +/* Int_Par_Ref becomes 18 */ +{ + One_Fifty Int_Loc; + + Int_Loc = Int_1_Par_Val + 2; + *Int_Par_Ref = Int_2_Par_Val + Int_Loc; +} /* Proc_7 */ + + +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) +/*********************************************************************/ +/* executed once */ +/* Int_Par_Val_1 == 3 */ +/* Int_Par_Val_2 == 7 */ +{ + One_Fifty Int_Index; + One_Fifty Int_Loc; + + Int_Loc = Int_1_Par_Val + 5; + Arr_1_Par_Ref[Int_Loc] = Int_2_Par_Val; + Arr_1_Par_Ref[Int_Loc+1] = Arr_1_Par_Ref[Int_Loc]; + Arr_1_Par_Ref[Int_Loc+30] = Int_Loc; + for (Int_Index = Int_Loc; Int_Index <= Int_Loc+1; ++Int_Index) + Arr_2_Par_Ref[Int_Loc][Int_Index] = Int_Loc; + Arr_2_Par_Ref[Int_Loc][Int_Loc-1] += 1; + Arr_2_Par_Ref[Int_Loc+20][Int_Loc] = Arr_1_Par_Ref[Int_Loc]; + Int_Glob = 5; +} /* Proc_8 */ + + +Enumeration Func_1(Capital_Letter Ch_1_Par_Val, Capital_Letter Ch_2_Par_Val) +/*************************************************/ +/* executed three times */ +/* first call: Ch_1_Par_Val == 'H', Ch_2_Par_Val == 'R' */ +/* second call: Ch_1_Par_Val == 'A', Ch_2_Par_Val == 'C' */ +/* third call: Ch_1_Par_Val == 'B', Ch_2_Par_Val == 'C' */ +{ + Capital_Letter Ch_1_Loc; + Capital_Letter Ch_2_Loc; + + Ch_1_Loc = Ch_1_Par_Val; + Ch_2_Loc = Ch_1_Loc; + if (Ch_2_Loc != Ch_2_Par_Val) { + /* then, executed */ + return Ident_1; + } else { + /* not executed */ + Ch_1_Glob = Ch_1_Loc; + return Ident_2; + } +} /* Func_1 */ + + +Boolean Func_2(Str_30 Str_1_Par_Ref, Str_30 Str_2_Par_Ref) +/*************************************************/ +/* executed once */ +/* Str_1_Par_Ref == "DHRYSTONE PROGRAM, 1'ST STRING" */ +/* Str_2_Par_Ref == "DHRYSTONE PROGRAM, 2'ND STRING" */ +{ + One_Thirty Int_Loc; + Capital_Letter Ch_Loc; + + Int_Loc = 2; + while (Int_Loc <= 2) { + /* loop body executed once */ + if (Func_1(Str_1_Par_Ref[Int_Loc], + Str_2_Par_Ref[Int_Loc+1]) == Ident_1) { + /* then, executed */ + Ch_Loc = 'A'; + Int_Loc += 1; + } + } /* if, while */ + if (Ch_Loc >= 'W' && Ch_Loc < 'Z') { + /* then, not executed */ + Int_Loc = 7; + } + if (Ch_Loc == 'R') { + /* then, not executed */ + return true; + } else { + /* executed */ + if (strcmp(Str_1_Par_Ref, Str_2_Par_Ref) > 0) { + /* then, not executed */ + Int_Loc += 7; + Int_Glob = Int_Loc; + return true; + } else { + /* executed */ + return false; + } + } /* if Ch_Loc */ +} /* Func_2 */ diff --git a/lib/dhry_run.c b/lib/dhry_run.c new file mode 100644 index 000000000000..f9d33efa6d09 --- /dev/null +++ b/lib/dhry_run.c @@ -0,0 +1,85 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Dhrystone benchmark test module + * + * Copyright (C) 2022 Glider bv + */ + +#include "dhry.h" + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/mutex.h> +#include <linux/smp.h> + +#define DHRY_VAX 1757 + +static int dhry_run_set(const char *val, const struct kernel_param *kp); +static const struct kernel_param_ops run_ops = { + .flags = KERNEL_PARAM_OPS_FL_NOARG, + .set = dhry_run_set, +}; +static bool dhry_run; +module_param_cb(run, &run_ops, &dhry_run, 0200); +MODULE_PARM_DESC(run, "Run the test (default: false)"); + +static int iterations = -1; +module_param(iterations, int, 0644); +MODULE_PARM_DESC(iterations, + "Number of iterations through the benchmark (default: auto)"); + +static void dhry_benchmark(void) +{ + int i, n; + + if (iterations > 0) { + n = dhry(iterations); + goto report; + } + + for (i = DHRY_VAX; i > 0; i <<= 1) { + n = dhry(i); + if (n != -EAGAIN) + break; + } + +report: + if (n >= 0) + pr_info("CPU%u: Dhrystones per Second: %d (%d DMIPS)\n", + smp_processor_id(), n, n / DHRY_VAX); + else if (n == -EAGAIN) + pr_err("Please increase the number of iterations\n"); + else + pr_err("Dhrystone benchmark failed error %pe\n", ERR_PTR(n)); +} + +static int dhry_run_set(const char *val, const struct kernel_param *kp) +{ + int ret; + + if (val) { + ret = param_set_bool(val, kp); + if (ret) + return ret; + } else { + dhry_run = true; + } + + if (dhry_run && system_state == SYSTEM_RUNNING) + dhry_benchmark(); + + return 0; +} + +static int __init dhry_init(void) +{ + if (dhry_run) + dhry_benchmark(); + + return 0; +} +module_init(dhry_init); + +MODULE_AUTHOR("Geert Uytterhoeven <geert+renesas@glider.be>"); +MODULE_LICENSE("GPL"); |