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authorDaniel Baumann <daniel.baumann@progress-linux.org>2019-02-08 07:30:37 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2019-02-08 07:30:37 +0000
commit8a7b72f7cd1ccd547a03eb4243294e741d661d3f (patch)
tree7bc7be4a8e9e298daa1349348400aa2a653866f2 /tests/profile/benchmark-line-parsing.c
parentNew upstream version 1.11.1+dfsg (diff)
downloadnetdata-8a7b72f7cd1ccd547a03eb4243294e741d661d3f.tar.xz
netdata-8a7b72f7cd1ccd547a03eb4243294e741d661d3f.zip
Adding upstream version 1.12.0.upstream/1.12.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/profile/benchmark-line-parsing.c')
-rw-r--r--tests/profile/benchmark-line-parsing.c707
1 files changed, 707 insertions, 0 deletions
diff --git a/tests/profile/benchmark-line-parsing.c b/tests/profile/benchmark-line-parsing.c
new file mode 100644
index 000000000..c07d1d857
--- /dev/null
+++ b/tests/profile/benchmark-line-parsing.c
@@ -0,0 +1,707 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+#include <stdio.h>
+#include <inttypes.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <sys/time.h>
+
+#define likely(x) __builtin_expect(!!(x), 1)
+#define unlikely(x) __builtin_expect(!!(x), 0)
+
+#define simple_hash(name) ({ \
+ register unsigned char *__hash_source = (unsigned char *)(name); \
+ register uint32_t __hash_value = 0x811c9dc5; \
+ while (*__hash_source) { \
+ __hash_value *= 16777619; \
+ __hash_value ^= (uint32_t) *__hash_source++; \
+ } \
+ __hash_value; \
+})
+
+static inline uint32_t simple_hash2(const char *name) {
+ register unsigned char *s = (unsigned char *)name;
+ register uint32_t hval = 0x811c9dc5;
+ while (*s) {
+ hval *= 16777619;
+ hval ^= (uint32_t) *s++;
+ }
+ return hval;
+}
+
+static inline unsigned long long fast_strtoull(const char *s) {
+ register unsigned long long n = 0;
+ register char c;
+ for(c = *s; c >= '0' && c <= '9' ; c = *(++s)) {
+ n *= 10;
+ n += c - '0';
+ // n = (n << 1) + (n << 3) + (c - '0');
+ }
+ return n;
+}
+
+static uint32_t cache_hash = 0;
+static uint32_t rss_hash = 0;
+static uint32_t rss_huge_hash = 0;
+static uint32_t mapped_file_hash = 0;
+static uint32_t writeback_hash = 0;
+static uint32_t dirty_hash = 0;
+static uint32_t swap_hash = 0;
+static uint32_t pgpgin_hash = 0;
+static uint32_t pgpgout_hash = 0;
+static uint32_t pgfault_hash = 0;
+static uint32_t pgmajfault_hash = 0;
+static uint32_t inactive_anon_hash = 0;
+static uint32_t active_anon_hash = 0;
+static uint32_t inactive_file_hash = 0;
+static uint32_t active_file_hash = 0;
+static uint32_t unevictable_hash = 0;
+static uint32_t hierarchical_memory_limit_hash = 0;
+static uint32_t total_cache_hash = 0;
+static uint32_t total_rss_hash = 0;
+static uint32_t total_rss_huge_hash = 0;
+static uint32_t total_mapped_file_hash = 0;
+static uint32_t total_writeback_hash = 0;
+static uint32_t total_dirty_hash = 0;
+static uint32_t total_swap_hash = 0;
+static uint32_t total_pgpgin_hash = 0;
+static uint32_t total_pgpgout_hash = 0;
+static uint32_t total_pgfault_hash = 0;
+static uint32_t total_pgmajfault_hash = 0;
+static uint32_t total_inactive_anon_hash = 0;
+static uint32_t total_active_anon_hash = 0;
+static uint32_t total_inactive_file_hash = 0;
+static uint32_t total_active_file_hash = 0;
+static uint32_t total_unevictable_hash = 0;
+
+char *strings[] = {
+ "cache",
+ "rss",
+ "rss_huge",
+ "mapped_file",
+ "writeback",
+ "dirty",
+ "swap",
+ "pgpgin",
+ "pgpgout",
+ "pgfault",
+ "pgmajfault",
+ "inactive_anon",
+ "active_anon",
+ "inactive_file",
+ "active_file",
+ "unevictable",
+ "hierarchical_memory_limit",
+ "total_cache",
+ "total_rss",
+ "total_rss_huge",
+ "total_mapped_file",
+ "total_writeback",
+ "total_dirty",
+ "total_swap",
+ "total_pgpgin",
+ "total_pgpgout",
+ "total_pgfault",
+ "total_pgmajfault",
+ "total_inactive_anon",
+ "total_active_anon",
+ "total_inactive_file",
+ "total_active_file",
+ "total_unevictable",
+ NULL
+};
+
+unsigned long long values1[12] = { 0 };
+unsigned long long values2[12] = { 0 };
+unsigned long long values3[12] = { 0 };
+unsigned long long values4[12] = { 0 };
+unsigned long long values5[12] = { 0 };
+unsigned long long values6[12] = { 0 };
+
+#define NUMBER1 "12345678901234"
+#define NUMBER2 "23456789012345"
+#define NUMBER3 "34567890123456"
+#define NUMBER4 "45678901234567"
+#define NUMBER5 "56789012345678"
+#define NUMBER6 "67890123456789"
+#define NUMBER7 "78901234567890"
+#define NUMBER8 "89012345678901"
+#define NUMBER9 "90123456789012"
+#define NUMBER10 "12345678901234"
+#define NUMBER11 "23456789012345"
+
+// simple system strcmp()
+void test1() {
+ int i;
+ for(i = 0; strings[i] ; i++) {
+ char *s = strings[i];
+
+ if(unlikely(!strcmp(s, "cache")))
+ values1[i] = strtoull(NUMBER1, NULL, 10);
+
+ else if(unlikely(!strcmp(s, "rss")))
+ values1[i] = strtoull(NUMBER2, NULL, 10);
+
+ else if(unlikely(!strcmp(s, "rss_huge")))
+ values1[i] = strtoull(NUMBER3, NULL, 10);
+
+ else if(unlikely(!strcmp(s, "mapped_file")))
+ values1[i] = strtoull(NUMBER4, NULL, 10);
+
+ else if(unlikely(!strcmp(s, "writeback")))
+ values1[i] = strtoull(NUMBER5, NULL, 10);
+
+ else if(unlikely(!strcmp(s, "dirty")))
+ values1[i] = strtoull(NUMBER6, NULL, 10);
+
+ else if(unlikely(!strcmp(s, "swap")))
+ values1[i] = strtoull(NUMBER7, NULL, 10);
+
+ else if(unlikely(!strcmp(s, "pgpgin")))
+ values1[i] = strtoull(NUMBER8, NULL, 10);
+
+ else if(unlikely(!strcmp(s, "pgpgout")))
+ values1[i] = strtoull(NUMBER9, NULL, 10);
+
+ else if(unlikely(!strcmp(s, "pgfault")))
+ values1[i] = strtoull(NUMBER10, NULL, 10);
+
+ else if(unlikely(!strcmp(s, "pgmajfault")))
+ values1[i] = strtoull(NUMBER11, NULL, 10);
+ }
+}
+
+// inline simple_hash() with system strtoull()
+void test2() {
+ int i;
+ for(i = 0; strings[i] ; i++) {
+ char *s = strings[i];
+ uint32_t hash = simple_hash2(s);
+
+ if(unlikely(hash == cache_hash && !strcmp(s, "cache")))
+ values2[i] = strtoull(NUMBER1, NULL, 10);
+
+ else if(unlikely(hash == rss_hash && !strcmp(s, "rss")))
+ values2[i] = strtoull(NUMBER2, NULL, 10);
+
+ else if(unlikely(hash == rss_huge_hash && !strcmp(s, "rss_huge")))
+ values2[i] = strtoull(NUMBER3, NULL, 10);
+
+ else if(unlikely(hash == mapped_file_hash && !strcmp(s, "mapped_file")))
+ values2[i] = strtoull(NUMBER4, NULL, 10);
+
+ else if(unlikely(hash == writeback_hash && !strcmp(s, "writeback")))
+ values2[i] = strtoull(NUMBER5, NULL, 10);
+
+ else if(unlikely(hash == dirty_hash && !strcmp(s, "dirty")))
+ values2[i] = strtoull(NUMBER6, NULL, 10);
+
+ else if(unlikely(hash == swap_hash && !strcmp(s, "swap")))
+ values2[i] = strtoull(NUMBER7, NULL, 10);
+
+ else if(unlikely(hash == pgpgin_hash && !strcmp(s, "pgpgin")))
+ values2[i] = strtoull(NUMBER8, NULL, 10);
+
+ else if(unlikely(hash == pgpgout_hash && !strcmp(s, "pgpgout")))
+ values2[i] = strtoull(NUMBER9, NULL, 10);
+
+ else if(unlikely(hash == pgfault_hash && !strcmp(s, "pgfault")))
+ values2[i] = strtoull(NUMBER10, NULL, 10);
+
+ else if(unlikely(hash == pgmajfault_hash && !strcmp(s, "pgmajfault")))
+ values2[i] = strtoull(NUMBER11, NULL, 10);
+ }
+}
+
+// statement expression simple_hash(), system strtoull()
+void test3() {
+ int i;
+ for(i = 0; strings[i] ; i++) {
+ char *s = strings[i];
+ uint32_t hash = simple_hash(s);
+
+ if(unlikely(hash == cache_hash && !strcmp(s, "cache")))
+ values3[i] = strtoull(NUMBER1, NULL, 10);
+
+ else if(unlikely(hash == rss_hash && !strcmp(s, "rss")))
+ values3[i] = strtoull(NUMBER2, NULL, 10);
+
+ else if(unlikely(hash == rss_huge_hash && !strcmp(s, "rss_huge")))
+ values3[i] = strtoull(NUMBER3, NULL, 10);
+
+ else if(unlikely(hash == mapped_file_hash && !strcmp(s, "mapped_file")))
+ values3[i] = strtoull(NUMBER4, NULL, 10);
+
+ else if(unlikely(hash == writeback_hash && !strcmp(s, "writeback")))
+ values3[i] = strtoull(NUMBER5, NULL, 10);
+
+ else if(unlikely(hash == dirty_hash && !strcmp(s, "dirty")))
+ values3[i] = strtoull(NUMBER6, NULL, 10);
+
+ else if(unlikely(hash == swap_hash && !strcmp(s, "swap")))
+ values3[i] = strtoull(NUMBER7, NULL, 10);
+
+ else if(unlikely(hash == pgpgin_hash && !strcmp(s, "pgpgin")))
+ values3[i] = strtoull(NUMBER8, NULL, 10);
+
+ else if(unlikely(hash == pgpgout_hash && !strcmp(s, "pgpgout")))
+ values3[i] = strtoull(NUMBER9, NULL, 10);
+
+ else if(unlikely(hash == pgfault_hash && !strcmp(s, "pgfault")))
+ values3[i] = strtoull(NUMBER10, NULL, 10);
+
+ else if(unlikely(hash == pgmajfault_hash && !strcmp(s, "pgmajfault")))
+ values3[i] = strtoull(NUMBER11, NULL, 10);
+ }
+}
+
+
+// inline simple_hash(), if-continue checks
+void test4() {
+ int i;
+ for(i = 0; strings[i] ; i++) {
+ char *s = strings[i];
+ uint32_t hash = simple_hash2(s);
+
+ if(unlikely(hash == cache_hash && !strcmp(s, "cache"))) {
+ values4[i] = strtoull(NUMBER1, NULL, 0);
+ continue;
+ }
+
+ if(unlikely(hash == rss_hash && !strcmp(s, "rss"))) {
+ values4[i] = strtoull(NUMBER2, NULL, 0);
+ continue;
+ }
+
+ if(unlikely(hash == rss_huge_hash && !strcmp(s, "rss_huge"))) {
+ values4[i] = strtoull(NUMBER3, NULL, 0);
+ continue;
+ }
+
+ if(unlikely(hash == mapped_file_hash && !strcmp(s, "mapped_file"))) {
+ values4[i] = strtoull(NUMBER4, NULL, 0);
+ continue;
+ }
+
+ if(unlikely(hash == writeback_hash && !strcmp(s, "writeback"))) {
+ values4[i] = strtoull(NUMBER5, NULL, 0);
+ continue;
+ }
+
+ if(unlikely(hash == dirty_hash && !strcmp(s, "dirty"))) {
+ values4[i] = strtoull(NUMBER6, NULL, 0);
+ continue;
+ }
+
+ if(unlikely(hash == swap_hash && !strcmp(s, "swap"))) {
+ values4[i] = strtoull(NUMBER7, NULL, 0);
+ continue;
+ }
+
+ if(unlikely(hash == pgpgin_hash && !strcmp(s, "pgpgin"))) {
+ values4[i] = strtoull(NUMBER8, NULL, 0);
+ continue;
+ }
+
+ if(unlikely(hash == pgpgout_hash && !strcmp(s, "pgpgout"))) {
+ values4[i] = strtoull(NUMBER9, NULL, 0);
+ continue;
+ }
+
+ if(unlikely(hash == pgfault_hash && !strcmp(s, "pgfault"))) {
+ values4[i] = strtoull(NUMBER10, NULL, 0);
+ continue;
+ }
+
+ if(unlikely(hash == pgmajfault_hash && !strcmp(s, "pgmajfault"))) {
+ values4[i] = strtoull(NUMBER11, NULL, 0);
+ continue;
+ }
+ }
+}
+
+// inline simple_hash(), if-else-if-else-if (netdata default)
+void test5() {
+ int i;
+ for(i = 0; strings[i] ; i++) {
+ char *s = strings[i];
+ uint32_t hash = simple_hash2(s);
+
+ if(unlikely(hash == cache_hash && !strcmp(s, "cache")))
+ values5[i] = fast_strtoull(NUMBER1);
+
+ else if(unlikely(hash == rss_hash && !strcmp(s, "rss")))
+ values5[i] = fast_strtoull(NUMBER2);
+
+ else if(unlikely(hash == rss_huge_hash && !strcmp(s, "rss_huge")))
+ values5[i] = fast_strtoull(NUMBER3);
+
+ else if(unlikely(hash == mapped_file_hash && !strcmp(s, "mapped_file")))
+ values5[i] = fast_strtoull(NUMBER4);
+
+ else if(unlikely(hash == writeback_hash && !strcmp(s, "writeback")))
+ values5[i] = fast_strtoull(NUMBER5);
+
+ else if(unlikely(hash == dirty_hash && !strcmp(s, "dirty")))
+ values5[i] = fast_strtoull(NUMBER6);
+
+ else if(unlikely(hash == swap_hash && !strcmp(s, "swap")))
+ values5[i] = fast_strtoull(NUMBER7);
+
+ else if(unlikely(hash == pgpgin_hash && !strcmp(s, "pgpgin")))
+ values5[i] = fast_strtoull(NUMBER8);
+
+ else if(unlikely(hash == pgpgout_hash && !strcmp(s, "pgpgout")))
+ values5[i] = fast_strtoull(NUMBER9);
+
+ else if(unlikely(hash == pgfault_hash && !strcmp(s, "pgfault")))
+ values5[i] = fast_strtoull(NUMBER10);
+
+ else if(unlikely(hash == pgmajfault_hash && !strcmp(s, "pgmajfault")))
+ values5[i] = fast_strtoull(NUMBER11);
+ }
+}
+
+// ----------------------------------------------------------------------------
+
+struct entry {
+ char *name;
+ uint32_t hash;
+ int found;
+ void (*func)(void *data1, void *data2);
+ void *data1;
+ void *data2;
+ struct entry *prev, *next;
+};
+
+struct base {
+ int iteration;
+ int registered;
+ int wanted;
+ int found;
+ struct entry *entries, *last;
+};
+
+static inline void callback(void *data1, void *data2) {
+ char *string = data1;
+ unsigned long long *value = data2;
+ *value = fast_strtoull(string);
+}
+
+static inline void callback_system_strtoull(void *data1, void *data2) {
+ char *string = data1;
+ unsigned long long *value = data2;
+ *value = strtoull(string, NULL, 10);
+}
+
+
+static inline struct base *entry(struct base *base, const char *name, void *data1, void *data2, void (*func)(void *, void *)) {
+ if(!base)
+ base = calloc(1, sizeof(struct base));
+
+ struct entry *e = malloc(sizeof(struct entry));
+ e->name = strdup(name);
+ e->hash = simple_hash2(e->name);
+ e->data1 = data1;
+ e->data2 = data2;
+ e->func = func;
+ e->prev = NULL;
+ e->next = base->entries;
+
+ if(base->entries) base->entries->prev = e;
+ else base->last = e;
+
+ base->entries = e;
+ base->registered++;
+ base->wanted = base->registered;
+
+ return base;
+}
+
+static inline int check(struct base *base, const char *s) {
+ uint32_t hash = simple_hash2(s);
+
+ if(likely(!strcmp(s, base->last->name))) {
+ base->last->found = 1;
+ base->found++;
+ if(base->last->func) base->last->func(base->last->data1, base->last->data2);
+ base->last = base->last->next;
+
+ if(!base->last)
+ base->last = base->entries;
+
+ if(base->found == base->registered)
+ return 1;
+
+ return 0;
+ }
+
+ // find it
+ struct entry *e;
+ for(e = base->entries; e ; e = e->next)
+ if(e->hash == hash && !strcmp(e->name, s))
+ break;
+
+ if(e == base->last) {
+ printf("ERROR\n");
+ exit(1);
+ }
+
+ if(e) {
+ // found
+
+ // run it
+ if(e->func) e->func(e->data1, e->data2);
+
+ // unlink it
+ if(e->next) e->next->prev = e->prev;
+ if(e->prev) e->prev->next = e->next;
+
+ if(base->entries == e)
+ base->entries = e->next;
+ }
+ else {
+ // not found
+
+ // create it
+ e = calloc(1, sizeof(struct entry));
+ e->name = strdup(s);
+ e->hash = hash;
+ }
+
+ // link it here
+ e->next = base->last;
+ if(base->last) {
+ e->prev = base->last->prev;
+ base->last->prev = e;
+
+ if(base->entries == base->last)
+ base->entries = e;
+ }
+ else
+ e->prev = NULL;
+
+ if(e->prev)
+ e->prev->next = e;
+
+ base->last = e->next;
+ if(!base->last)
+ base->last = base->entries;
+
+ e->found = 1;
+ base->found++;
+
+ if(base->found == base->registered)
+ return 1;
+
+ printf("relinked '%s' after '%s' and before '%s': ", e->name, e->prev?e->prev->name:"NONE", e->next?e->next->name:"NONE");
+ for(e = base->entries; e ; e = e->next) printf("%s ", e->name);
+ printf("\n");
+
+ return 0;
+}
+
+static inline void begin(struct base *base) {
+
+ if(unlikely(base->iteration % 60) == 1) {
+ base->wanted = 0;
+ struct entry *e;
+ for(e = base->entries; e ; e = e->next)
+ if(e->found) base->wanted++;
+ }
+
+ base->iteration++;
+ base->last = base->entries;
+ base->found = 0;
+}
+
+void test6() {
+
+ static struct base *base = NULL;
+
+ if(unlikely(!base)) {
+ base = entry(base, "cache", NUMBER1, &values6[0], callback_system_strtoull);
+ base = entry(base, "rss", NUMBER2, &values6[1], callback_system_strtoull);
+ base = entry(base, "rss_huge", NUMBER3, &values6[2], callback_system_strtoull);
+ base = entry(base, "mapped_file", NUMBER4, &values6[3], callback_system_strtoull);
+ base = entry(base, "writeback", NUMBER5, &values6[4], callback_system_strtoull);
+ base = entry(base, "dirty", NUMBER6, &values6[5], callback_system_strtoull);
+ base = entry(base, "swap", NUMBER7, &values6[6], callback_system_strtoull);
+ base = entry(base, "pgpgin", NUMBER8, &values6[7], callback_system_strtoull);
+ base = entry(base, "pgpgout", NUMBER9, &values6[8], callback_system_strtoull);
+ base = entry(base, "pgfault", NUMBER10, &values6[9], callback_system_strtoull);
+ base = entry(base, "pgmajfault", NUMBER11, &values6[10], callback_system_strtoull);
+ }
+
+ begin(base);
+
+ int i;
+ for(i = 0; strings[i] ; i++) {
+ if(check(base, strings[i]))
+ break;
+ }
+}
+
+void test7() {
+
+ static struct base *base = NULL;
+
+ if(unlikely(!base)) {
+ base = entry(base, "cache", NUMBER1, &values6[0], callback);
+ base = entry(base, "rss", NUMBER2, &values6[1], callback);
+ base = entry(base, "rss_huge", NUMBER3, &values6[2], callback);
+ base = entry(base, "mapped_file", NUMBER4, &values6[3], callback);
+ base = entry(base, "writeback", NUMBER5, &values6[4], callback);
+ base = entry(base, "dirty", NUMBER6, &values6[5], callback);
+ base = entry(base, "swap", NUMBER7, &values6[6], callback);
+ base = entry(base, "pgpgin", NUMBER8, &values6[7], callback);
+ base = entry(base, "pgpgout", NUMBER9, &values6[8], callback);
+ base = entry(base, "pgfault", NUMBER10, &values6[9], callback);
+ base = entry(base, "pgmajfault", NUMBER11, &values6[10], callback);
+ }
+
+ begin(base);
+
+ int i;
+ for(i = 0; strings[i] ; i++) {
+ if(check(base, strings[i]))
+ break;
+ }
+}
+
+// ----------------------------------------------------------------------------
+
+
+// ==============
+// --- Poor man cycle counting.
+static unsigned long tsc;
+
+static void begin_tsc(void)
+{
+ unsigned long a, d;
+ asm volatile ("cpuid\nrdtsc" : "=a" (a), "=d" (d) : "0" (0) : "ebx", "ecx");
+ tsc = ((unsigned long)d << 32) | (unsigned long)a;
+}
+
+static unsigned long end_tsc(void)
+{
+ unsigned long a, d;
+ asm volatile ("rdtscp" : "=a" (a), "=d" (d) : : "ecx");
+ return (((unsigned long)d << 32) | (unsigned long)a) - tsc;
+}
+// ===============
+
+static unsigned long long clk;
+
+static void begin_clock() {
+ struct timeval tv;
+ if(unlikely(gettimeofday(&tv, NULL) == -1))
+ return;
+ clk = tv.tv_sec * 1000000 + tv.tv_usec;
+}
+
+static unsigned long long end_clock() {
+ struct timeval tv;
+ if(unlikely(gettimeofday(&tv, NULL) == -1))
+ return -1;
+ return clk = tv.tv_sec * 1000000 + tv.tv_usec - clk;
+}
+
+void main(void)
+{
+ cache_hash = simple_hash("cache");
+ rss_hash = simple_hash("rss");
+ rss_huge_hash = simple_hash("rss_huge");
+ mapped_file_hash = simple_hash("mapped_file");
+ writeback_hash = simple_hash("writeback");
+ dirty_hash = simple_hash("dirty");
+ swap_hash = simple_hash("swap");
+ pgpgin_hash = simple_hash("pgpgin");
+ pgpgout_hash = simple_hash("pgpgout");
+ pgfault_hash = simple_hash("pgfault");
+ pgmajfault_hash = simple_hash("pgmajfault");
+ inactive_anon_hash = simple_hash("inactive_anon");
+ active_anon_hash = simple_hash("active_anon");
+ inactive_file_hash = simple_hash("inactive_file");
+ active_file_hash = simple_hash("active_file");
+ unevictable_hash = simple_hash("unevictable");
+ hierarchical_memory_limit_hash = simple_hash("hierarchical_memory_limit");
+ total_cache_hash = simple_hash("total_cache");
+ total_rss_hash = simple_hash("total_rss");
+ total_rss_huge_hash = simple_hash("total_rss_huge");
+ total_mapped_file_hash = simple_hash("total_mapped_file");
+ total_writeback_hash = simple_hash("total_writeback");
+ total_dirty_hash = simple_hash("total_dirty");
+ total_swap_hash = simple_hash("total_swap");
+ total_pgpgin_hash = simple_hash("total_pgpgin");
+ total_pgpgout_hash = simple_hash("total_pgpgout");
+ total_pgfault_hash = simple_hash("total_pgfault");
+ total_pgmajfault_hash = simple_hash("total_pgmajfault");
+ total_inactive_anon_hash = simple_hash("total_inactive_anon");
+ total_active_anon_hash = simple_hash("total_active_anon");
+ total_inactive_file_hash = simple_hash("total_inactive_file");
+ total_active_file_hash = simple_hash("total_active_file");
+ total_unevictable_hash = simple_hash("total_unevictable");
+
+ // cache functions
+ (void)simple_hash2("hello world");
+ (void)strcmp("1", "2");
+ (void)strtoull("123", NULL, 0);
+
+ unsigned long i, c1 = 0, c2 = 0, c3 = 0, c4 = 0, c5 = 0, c6 = 0, c7;
+ unsigned long max = 1000000;
+
+ // let the processor get up to speed
+ begin_clock();
+ for(i = 0; i <= max ;i++) test1();
+ c1 = end_clock();
+
+ begin_clock();
+ for(i = 0; i <= max ;i++) test1();
+ c1 = end_clock();
+
+ begin_clock();
+ for(i = 0; i <= max ;i++) test2();
+ c2 = end_clock();
+
+ begin_clock();
+ for(i = 0; i <= max ;i++) test3();
+ c3 = end_clock();
+
+ begin_clock();
+ for(i = 0; i <= max ;i++) test4();
+ c4 = end_clock();
+
+ begin_clock();
+ for(i = 0; i <= max ;i++) test5();
+ c5 = end_clock();
+
+ begin_clock();
+ for(i = 0; i <= max ;i++) test6();
+ c6 = end_clock();
+
+ begin_clock();
+ for(i = 0; i <= max ;i++) test7();
+ c7 = end_clock();
+
+ for(i = 0; i < 11 ; i++)
+ printf("value %lu: %llu %llu %llu %llu %llu %llu\n", i, values1[i], values2[i], values3[i], values4[i], values5[i], values6[i]);
+
+ printf("\n\nRESULTS\n");
+ printf("test1() in %lu usecs: if-else-if-else-if, simple strcmp() with system strtoull().\n"
+ "test2() in %lu usecs: inline simple_hash() if-else-if-else-if, with system strtoull().\n"
+ "test3() in %lu usecs: statement expression simple_hash(), system strtoull().\n"
+ "test4() in %lu usecs: inline simple_hash(), if-continue checks, system strtoull().\n"
+ "test5() in %lu usecs: inline simple_hash(), if-else-if-else-if, custom strtoull() (netdata default prior to ARL).\n"
+ "test6() in %lu usecs: adaptive re-sortable list, system strtoull() (wow!)\n"
+ "test7() in %lu usecs: adaptive re-sortable list, custom strtoull() (wow!)\n"
+ , c1
+ , c2
+ , c3
+ , c4
+ , c5
+ , c6
+ , c7
+ );
+
+}