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-rw-r--r--tests/profile/benchmark-procfile-parser.c329
1 files changed, 0 insertions, 329 deletions
diff --git a/tests/profile/benchmark-procfile-parser.c b/tests/profile/benchmark-procfile-parser.c
deleted file mode 100644
index 991e2dfc..00000000
--- a/tests/profile/benchmark-procfile-parser.c
+++ /dev/null
@@ -1,329 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-
-#include "config.h"
-#include "libnetdata/libnetdata.h"
-
-void netdata_cleanup_and_exit(int ret) {
- exit(ret);
-}
-
-#define PF_PREFIX "PROCFILE"
-#define PFWORDS_INCREASE_STEP 200
-#define PFLINES_INCREASE_STEP 10
-#define PROCFILE_INCREMENT_BUFFER 512
-extern size_t procfile_max_lines;
-extern size_t procfile_max_words;
-extern size_t procfile_max_allocation;
-
-
-static inline void pflines_reset(pflines *fl) {
- // debug(D_PROCFILE, PF_PREFIX ": reseting lines");
-
- fl->len = 0;
-}
-
-static inline void pflines_free(pflines *fl) {
- // debug(D_PROCFILE, PF_PREFIX ": freeing lines");
-
- freez(fl);
-}
-
-static inline void pfwords_reset(pfwords *fw) {
- // debug(D_PROCFILE, PF_PREFIX ": reseting words");
- fw->len = 0;
-}
-
-
-static inline void pfwords_add(procfile *ff, char *str) {
- // debug(D_PROCFILE, PF_PREFIX ": adding word No %d: '%s'", fw->len, str);
-
- pfwords *fw = ff->words;
- if(unlikely(fw->len == fw->size)) {
- // debug(D_PROCFILE, PF_PREFIX ": expanding words");
-
- ff->words = fw = reallocz(fw, sizeof(pfwords) + (fw->size + PFWORDS_INCREASE_STEP) * sizeof(char *));
- fw->size += PFWORDS_INCREASE_STEP;
- }
-
- fw->words[fw->len++] = str;
-}
-
-NEVERNULL
-static inline size_t *pflines_add(procfile *ff) {
- // debug(D_PROCFILE, PF_PREFIX ": adding line %d at word %d", fl->len, first_word);
-
- pflines *fl = ff->lines;
- if(unlikely(fl->len == fl->size)) {
- // debug(D_PROCFILE, PF_PREFIX ": expanding lines");
-
- ff->lines = fl = reallocz(fl, sizeof(pflines) + (fl->size + PFLINES_INCREASE_STEP) * sizeof(ffline));
- fl->size += PFLINES_INCREASE_STEP;
- }
-
- ffline *ffl = &fl->lines[fl->len++];
- ffl->words = 0;
- ffl->first = ff->words->len;
-
- return &ffl->words;
-}
-
-
-NOINLINE
-static void procfile_parser(procfile *ff) {
- // debug(D_PROCFILE, PF_PREFIX ": Parsing file '%s'", ff->filename);
-
- char *s = ff->data // our current position
- , *e = &ff->data[ff->len] // the terminating null
- , *t = ff->data; // the first character of a word (or quoted / parenthesized string)
-
- // the look up array to find our type of character
- PF_CHAR_TYPE *separators = ff->separators;
-
- char quote = 0; // the quote character - only when in quoted string
- size_t opened = 0; // counts the number of open parenthesis
-
- size_t *line_words = pflines_add(ff);
-
- while(s < e) {
- PF_CHAR_TYPE ct = separators[(unsigned char)(*s)];
-
- // this is faster than a switch()
- // read more here: http://lazarenko.me/switch/
- switch(ct) {
- case PF_CHAR_IS_SEPARATOR:
- if(!quote && !opened) {
- if (s != t) {
- // separator, but we have word before it
- *s = '\0';
- pfwords_add(ff, t);
- (*line_words)++;
- }
- t = s + 1;
- }
- // fallthrough
-
- case PF_CHAR_IS_WORD:
- s++;
- break;
-
-
- case PF_CHAR_IS_NEWLINE:
- // end of line
-
- *s = '\0';
- pfwords_add(ff, t);
- (*line_words)++;
- t = ++s;
-
- // debug(D_PROCFILE, PF_PREFIX ": ended line %d with %d words", l, ff->lines->lines[l].words);
-
- line_words = pflines_add(ff);
- break;
-
- case PF_CHAR_IS_QUOTE:
- if(unlikely(!quote && s == t)) {
- // quote opened at the beginning
- quote = *s;
- t = ++s;
- }
- else if(unlikely(quote && quote == *s)) {
- // quote closed
- quote = 0;
-
- *s = '\0';
- pfwords_add(ff, t);
- (*line_words)++;
- t = ++s;
- }
- else
- s++;
- break;
-
- case PF_CHAR_IS_OPEN:
- if(s == t) {
- opened++;
- t = ++s;
- }
- else if(opened) {
- opened++;
- s++;
- }
- else
- s++;
- break;
-
- case PF_CHAR_IS_CLOSE:
- if(opened) {
- opened--;
-
- if(!opened) {
- *s = '\0';
- pfwords_add(ff, t);
- (*line_words)++;
- t = ++s;
- }
- else
- s++;
- }
- else
- s++;
- break;
-
- default:
- fatal("Internal Error: procfile_readall() does not handle all the cases.");
- }
- }
-
- if(likely(s > t && t < e)) {
- // the last word
- if(unlikely(ff->len >= ff->size)) {
- // we are going to loose the last byte
- s = &ff->data[ff->size - 1];
- }
-
- *s = '\0';
- pfwords_add(ff, t);
- (*line_words)++;
- // t = ++s;
- }
-}
-
-
-procfile *procfile_readall1(procfile *ff) {
- // debug(D_PROCFILE, PF_PREFIX ": Reading file '%s'.", ff->filename);
-
- ff->len = 0; // zero the used size
- ssize_t r = 1; // read at least once
- while(r > 0) {
- ssize_t s = ff->len;
- ssize_t x = ff->size - s;
-
- if(unlikely(!x)) {
- debug(D_PROCFILE, PF_PREFIX ": Expanding data buffer for file '%s'.", procfile_filename(ff));
- ff = reallocz(ff, sizeof(procfile) + ff->size + PROCFILE_INCREMENT_BUFFER);
- ff->size += PROCFILE_INCREMENT_BUFFER;
- }
-
- debug(D_PROCFILE, "Reading file '%s', from position %zd with length %zd", procfile_filename(ff), s, (ssize_t)(ff->size - s));
- r = read(ff->fd, &ff->data[s], ff->size - s);
- if(unlikely(r == -1)) {
- if(unlikely(!(ff->flags & PROCFILE_FLAG_NO_ERROR_ON_FILE_IO))) error(PF_PREFIX ": Cannot read from file '%s' on fd %d", procfile_filename(ff), ff->fd);
- procfile_close(ff);
- return NULL;
- }
-
- ff->len += r;
- }
-
- // debug(D_PROCFILE, "Rewinding file '%s'", ff->filename);
- if(unlikely(lseek(ff->fd, 0, SEEK_SET) == -1)) {
- if(unlikely(!(ff->flags & PROCFILE_FLAG_NO_ERROR_ON_FILE_IO))) error(PF_PREFIX ": Cannot rewind on file '%s'.", procfile_filename(ff));
- procfile_close(ff);
- return NULL;
- }
-
- pflines_reset(ff->lines);
- pfwords_reset(ff->words);
- procfile_parser(ff);
-
- if(unlikely(procfile_adaptive_initial_allocation)) {
- if(unlikely(ff->len > procfile_max_allocation)) procfile_max_allocation = ff->len;
- if(unlikely(ff->lines->len > procfile_max_lines)) procfile_max_lines = ff->lines->len;
- if(unlikely(ff->words->len > procfile_max_words)) procfile_max_words = ff->words->len;
- }
-
- // debug(D_PROCFILE, "File '%s' updated.", ff->filename);
- return ff;
-}
-
-
-
-
-
-
-
-
-// ==============
-// --- Poor man cycle counting.
-static unsigned long tsc;
-
-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;
-}
-
-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;
-}
-// ==============
-
-
-unsigned long test_netdata_internal(void) {
- static procfile *ff = NULL;
-
- ff = procfile_reopen(ff, "/proc/self/status", " \t:,-()/", PROCFILE_FLAG_NO_ERROR_ON_FILE_IO);
- if(!ff) {
- fprintf(stderr, "Failed to open filename\n");
- exit(1);
- }
-
- begin_tsc();
- ff = procfile_readall(ff);
- unsigned long c = end_tsc();
-
- if(!ff) {
- fprintf(stderr, "Failed to read filename\n");
- exit(1);
- }
-
- return c;
-}
-
-unsigned long test_method1(void) {
- static procfile *ff = NULL;
-
- ff = procfile_reopen(ff, "/proc/self/status", " \t:,-()/", PROCFILE_FLAG_NO_ERROR_ON_FILE_IO);
- if(!ff) {
- fprintf(stderr, "Failed to open filename\n");
- exit(1);
- }
-
- begin_tsc();
- ff = procfile_readall1(ff);
- unsigned long c = end_tsc();
-
- if(!ff) {
- fprintf(stderr, "Failed to read filename\n");
- exit(1);
- }
-
- return c;
-}
-
-//--- Test
-int main(int argc, char **argv)
-{
- (void)argc; (void)argv;
-
- int i, max = 1000000;
-
- unsigned long c1 = 0;
- test_netdata_internal();
- for(i = 0; i < max ; i++)
- c1 += test_netdata_internal();
-
- unsigned long c2 = 0;
- test_method1();
- for(i = 0; i < max ; i++)
- c2 += test_method1();
-
- printf("netdata internal: completed in %lu cycles, %lu cycles per read, %0.2f %%.\n", c1, c1 / max, (float)c1 * 100.0 / (float)c1);
- printf("method1 : completed in %lu cycles, %lu cycles per read, %0.2f %%.\n", c2, c2 / max, (float)c2 * 100.0 / (float)c1);
-
- return 0;
-}
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