perf bench mem: Pull out init/fini logic

No functional change.

Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Raghavendra K T <raghavendra.kt@amd.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Author: terminus

tools/perf/bench/mem-functions.c

@@ -62,15 +62,31 @@ struct bench_params {
 	unsigned int	nr_loops;
 };
 
+struct bench_mem_info {
+	const struct function *functions;
+	int (*do_op)(const struct function *r, struct bench_params *p,
+		     void *src, void *dst, union bench_clock *rt);
+	const char *const *usage;
+	bool alloc_src;
+};
+
+typedef bool (*mem_init_t)(struct bench_mem_info *, struct bench_params *,
+			   void **, void **);
+typedef void (*mem_fini_t)(struct bench_mem_info *, struct bench_params *,
+			   void **, void **);
 typedef void *(*memcpy_t)(void *, const void *, size_t);
 typedef void *(*memset_t)(void *, int, size_t);
 
 struct function {
 	const char *name;
 	const char *desc;
-	union {
-		memcpy_t memcpy;
-		memset_t memset;
+	struct {
+		mem_init_t init;
+		mem_fini_t fini;
+		union {
+			memcpy_t memcpy;
+			memset_t memset;
+		};
 	} fn;
 };
 
@@ -138,37 +154,24 @@ static double timeval2double(struct timeval *ts)
 			printf(" %14lf GB/sec\n", x / K / K / K);	\
 	} while (0)
 
-struct bench_mem_info {
-	const struct function *functions;
-	union bench_clock (*do_op)(const struct function *r, struct bench_params *p,
-				   void *src, void *dst);
-	const char *const *usage;
-	bool alloc_src;
-};
-
 static void __bench_mem_function(struct bench_mem_info *info, struct bench_params *p,
 				 int r_idx)
 {
 	const struct function *r = &info->functions[r_idx];
 	double result_bps = 0.0;
 	union bench_clock rt = { 0 };
-	void *src = NULL, *dst = zalloc(p->size);
+	void *src = NULL, *dst = NULL;
 
 	printf("# function '%s' (%s)\n", r->name, r->desc);
 
-	if (dst == NULL)
-		goto out_alloc_failed;
-
-	if (info->alloc_src) {
-		src = zalloc(p->size);
-		if (src == NULL)
-			goto out_alloc_failed;
-	}
+	if (r->fn.init && r->fn.init(info, p, &src, &dst))
+		goto out_init_failed;
 
 	if (bench_format == BENCH_FORMAT_DEFAULT)
 		printf("# Copying %s bytes ...\n\n", size_str);
 
-	rt = info->do_op(r, p, src, dst);
+	if (info->do_op(r, p, src, dst, &rt))
+		goto out_test_failed;
 
 	switch (bench_format) {
 	case BENCH_FORMAT_DEFAULT:
@@ -194,11 +197,11 @@ static void __bench_mem_function(struct bench_mem_info *info, struct bench_param
 		break;
 	}
 
+out_test_failed:
 out_free:
-	free(src);
-	free(dst);
+	if (r->fn.fini) r->fn.fini(info, p, &src, &dst);
 	return;
-out_alloc_failed:
+out_init_failed:
 	printf("# Memory allocation failed - maybe size (%s) is too large?\n", size_str);
 	goto out_free;
 }
@@ -265,8 +268,8 @@ static void memcpy_prefault(memcpy_t fn, size_t size, void *src, void *dst)
 	fn(dst, src, size);
 }
 
-static union bench_clock do_memcpy(const struct function *r, struct bench_params *p,
-				   void *src, void *dst)
+static int do_memcpy(const struct function *r, struct bench_params *p,
+		     void *src, void *dst, union bench_clock *rt)
 {
 	union bench_clock start, end;
 	memcpy_t fn = r->fn.memcpy;
@@ -278,16 +281,47 @@ static union bench_clock do_memcpy(const struct function *r, struct bench_params
 		fn(dst, src, p->size);
 	clock_get(&end);
 
-	return clock_diff(&start, &end);
+	*rt = clock_diff(&start, &end);
+
+	return 0;
+}
+
+static bool mem_alloc(struct bench_mem_info *info, struct bench_params *p,
+		      void **src, void **dst)
+{
+	bool failed;
+
+	*dst = zalloc(p->size);
+	failed = *dst == NULL;
+
+	if (info->alloc_src) {
+		*src = zalloc(p->size);
+		failed = failed || *src == NULL;
+	}
+
+	return failed;
+}
+
+static void mem_free(struct bench_mem_info *info __maybe_unused,
+		     struct bench_params *p __maybe_unused,
+		     void **src, void **dst)
+{
+	free(*dst);
+	free(*src);
+
+	*dst = *src = NULL;
 }
 
 struct function memcpy_functions[] = {
 	{ .name		= "default",
 	  .desc		= "Default memcpy() provided by glibc",
+	  .fn.init	= mem_alloc,
+	  .fn.fini	= mem_free,
 	  .fn.memcpy	= memcpy },
 
 #ifdef HAVE_ARCH_X86_64_SUPPORT
-# define MEMCPY_FN(_fn, _name, _desc) {.name = _name, .desc = _desc, .fn.memcpy = _fn},
+# define MEMCPY_FN(_fn, _init, _fini, _name, _desc)	\
+	{.name = _name, .desc = _desc, .fn.memcpy = _fn, .fn.init = _init, .fn.fini = _fini },
 # include "mem-memcpy-x86-64-asm-def.h"
 # undef MEMCPY_FN
 #endif
@@ -312,8 +346,8 @@ int bench_mem_memcpy(int argc, const char **argv)
 	return bench_mem_common(argc, argv, &info);
 }
 
-static union bench_clock do_memset(const struct function *r, struct bench_params *p,
-				   void *src __maybe_unused, void *dst)
+static int do_memset(const struct function *r, struct bench_params *p,
+		     void *src __maybe_unused, void *dst, union bench_clock *rt)
 {
 	union bench_clock start, end;
 	memset_t fn = r->fn.memset;
@@ -329,7 +363,9 @@ static union bench_clock do_memset(const struct function *r, struct bench_params
 		fn(dst, i, p->size);
 	clock_get(&end);
 
-	return clock_diff(&start, &end);
+	*rt = clock_diff(&start, &end);
+
+	return 0;
 }
 
 static const char * const bench_mem_memset_usage[] = {
@@ -340,10 +376,13 @@ static const char * const bench_mem_memset_usage[] = {
 static const struct function memset_functions[] = {
 	{ .name		= "default",
 	  .desc		= "Default memset() provided by glibc",
+	  .fn.init	= mem_alloc,
+	  .fn.fini	= mem_free,
 	  .fn.memset	= memset },
 
 #ifdef HAVE_ARCH_X86_64_SUPPORT
-# define MEMSET_FN(_fn, _name, _desc) { .name = _name, .desc = _desc, .fn.memset = _fn },
+# define MEMSET_FN(_fn, _init, _fini, _name, _desc) \
+	{.name = _name, .desc = _desc, .fn.memset = _fn, .fn.init = _init, .fn.fini = _fini },
 # include "mem-memset-x86-64-asm-def.h"
 # undef MEMSET_FN
 #endif

tools/perf/bench/mem-memcpy-arch.h

@@ -2,7 +2,7 @@
 
 #ifdef HAVE_ARCH_X86_64_SUPPORT
 
-#define MEMCPY_FN(fn, name, desc)		\
+#define MEMCPY_FN(fn, init, fini, name, desc)		\
 	void *fn(void *, const void *, size_t);
 
 #include "mem-memcpy-x86-64-asm-def.h"

tools/perf/bench/mem-memcpy-x86-64-asm-def.h

@@ -1,9 +1,13 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 
 MEMCPY_FN(memcpy_orig,
+	mem_alloc,
+	mem_free,
 	"x86-64-unrolled",
 	"unrolled memcpy() in arch/x86/lib/memcpy_64.S")
 
 MEMCPY_FN(__memcpy,
+	mem_alloc,
+	mem_free,
 	"x86-64-movsq",
 	"movsq-based memcpy() in arch/x86/lib/memcpy_64.S")

tools/perf/bench/mem-memset-arch.h

@@ -2,7 +2,7 @@
 
 #ifdef HAVE_ARCH_X86_64_SUPPORT
 
-#define MEMSET_FN(fn, name, desc)		\
+#define MEMSET_FN(fn, init, fini, name, desc)	\
 	void *fn(void *, int, size_t);
 
 #include "mem-memset-x86-64-asm-def.h"

tools/perf/bench/mem-memset-x86-64-asm-def.h

@@ -1,9 +1,13 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 
 MEMSET_FN(memset_orig,
+	mem_alloc,
+	mem_free,
 	"x86-64-unrolled",
 	"unrolled memset() in arch/x86/lib/memset_64.S")
 
 MEMSET_FN(__memset,
+	mem_alloc,
+	mem_free,
 	"x86-64-stosq",
 	"movsq-based memset() in arch/x86/lib/memset_64.S")