diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 881c3f84e88a32da05751dad0b54c0fbca5468e7..918bda4ee120df897ce4bf05cceeca5ec307c716 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 4d9461bfea42c6792f06e2e9dc2fabe0787f02df..06b9dcd80cdaa3585a64b87c1e4855483f94b45c 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 0000000000000000000000000000000000000000..e1a4db8e252c3342839d5814af6cb5b0ea220047
--- /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 0000000000000000000000000000000000000000..83247106824cc7f4e6a6aef5029781ca28362cb8
--- /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 0000000000000000000000000000000000000000..c19e661f37d30a662d2789d43d620d6fb345c681
--- /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 0000000000000000000000000000000000000000..f9d33efa6d09060445dfbf481c01f5594dc37417
--- /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");