diff options
Diffstat (limited to 'tests/profile/benchmark-line-parsing.c')
| -rw-r--r-- | tests/profile/benchmark-line-parsing.c | 707 |
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 00000000..c07d1d85 --- /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 + ); + +} |