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[OPTIM] halog: cache some common fields positions 

Since many fields are relative and some are used a lot, try to cache them
the first time they're used in order to avoid skipping them twice. The
status counts with HTTP pre-check enabled has sped up by 40%.
This commit is contained in:
Willy Tarreau 2011-07-10 18:53:44 +02:00
parent df6f0d1e49
commit 758a6ea46c
1 changed files with 58 additions and 36 deletions
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94
contrib/halog/halog.c
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@ -385,7 +385,7 @@ void truncated_line(int linenum, const char *line)
int main(int argc, char **argv)
{
const char *b, *e, *p;
const char *b, *e, *p, *time_field;
const char *output_file = NULL;
int f, tot, last, linenum, err, parse_err;
struct timer *t = NULL, *t2;
@ -494,21 +494,22 @@ int main(int argc, char **argv)
while ((line = fgets2(stdin)) != NULL) {
linenum++;
time_field = NULL;
test = 1;
if (unlikely(filter & FILT_HTTP_ONLY)) {
/* only report lines with at least 4 timers */
b = field_start(line, TIME_FIELD + skip_fields);
if (!*b) {
if (!time_field)
time_field = field_start(line, TIME_FIELD + skip_fields);
if (!*time_field) {
truncated_line(linenum, line);
continue;
}
e = field_stop(b + 1);
/* we have field TIME_FIELD in [b]..[e-1] */
p = b;
err = 0;
e = field_stop(time_field + 1);
/* we have field TIME_FIELD in [time_field]..[e-1] */
p = time_field;
f = 0;
while (!SEP(*p)) {
if (++f == 4)
@ -522,16 +523,17 @@ int main(int argc, char **argv)
int tps;
/* only report lines with response times larger than filter_time_resp */
b = field_start(line, TIME_FIELD + skip_fields);
if (!*b) {
if (!time_field)
time_field = field_start(line, TIME_FIELD + skip_fields);
if (!*time_field) {
truncated_line(linenum, line);
continue;
}
e = field_stop(b + 1);
/* we have field TIME_FIELD in [b]..[e-1], let's check only the response time */
e = field_stop(time_field + 1);
/* we have field TIME_FIELD in [time_field]..[e-1], let's check only the response time */
p = b;
p = time_field;
err = 0;
f = 0;
while (!SEP(*p)) {
@ -555,7 +557,13 @@ int main(int argc, char **argv)
if (unlikely(filter & FILT_ERRORS_ONLY)) {
/* only report erroneous status codes */
b = field_start(line, STATUS_FIELD + skip_fields);
if (!time_field)
time_field = field_start(line, TIME_FIELD + skip_fields);
if (!*time_field) {
truncated_line(linenum, line);
continue;
}
b = field_start(time_field, STATUS_FIELD - TIME_FIELD + 1);
if (!*b) {
truncated_line(linenum, line);
continue;
@ -595,16 +603,21 @@ int main(int argc, char **argv)
if (unlikely(filter & (FILT_GRAPH_TIMERS|FILT_PERCENTILE))) {
int f;
b = field_start(line, TIME_FIELD + skip_fields);
if (!*b) {
if (!time_field)
time_field = field_start(line, TIME_FIELD + skip_fields);
if (!*time_field) {
truncated_line(linenum, line);
continue;
}
if (!*time_field) {
truncated_line(linenum, line);
continue;
}
e = field_stop(b + 1);
/* we have field TIME_FIELD in [b]..[e-1] */
e = field_stop(time_field + 1);
/* we have field TIME_FIELD in [time_field]..[e-1] */
p = b;
p = time_field;
err = 0;
f = 0;
while (!SEP(*p)) {
@ -685,7 +698,10 @@ int main(int argc, char **argv)
continue;
}
b = field_start(b, STATUS_FIELD - SOURCE_FIELD + 1);
if (time_field)
b = field_start(time_field, STATUS_FIELD - TIME_FIELD + 1);
else
b = field_start(b, STATUS_FIELD - SOURCE_FIELD + 1);
if (!*b) {
truncated_line(linenum, line);
continue;
@ -707,7 +723,10 @@ int main(int argc, char **argv)
continue;
}
b = field_start(b, TERM_CODES_FIELD - SOURCE_FIELD + 1);
if (time_field)
b = field_start(time_field, TERM_CODES_FIELD - TIME_FIELD + 1);
else
b = field_start(b, TERM_CODES_FIELD - SOURCE_FIELD + 1);
if (!*b) {
truncated_line(linenum, line);
continue;
@ -760,16 +779,17 @@ int main(int argc, char **argv)
}
/* let's collect the connect and response times */
b = field_start(e, TIME_FIELD - SERVER_FIELD);
if (!*b) {
if (!time_field)
time_field = field_start(e, TIME_FIELD - SERVER_FIELD);
if (!*time_field) {
truncated_line(linenum, line);
continue;
}
e = field_stop(b + 1);
/* we have field TIME_FIELD in [b]..[e-1] */
e = field_stop(time_field + 1);
/* we have field TIME_FIELD in [time_field]..[e-1] */
p = b;
p = time_field;
err = 0;
f = 0;
while (!SEP(*p)) {
@ -821,25 +841,27 @@ int main(int argc, char **argv)
if (unlikely(filter & FILT_COUNT_URL_ANY)) {
/* first, let's ensure that the line is a traffic line (beginning
* with an IP address)
* with an IP address, or already having a time field)
*/
b = field_start(line, SOURCE_FIELD + skip_fields); // avg 95 ns per line
if (*b < '0' || *b > '9') {
parse_err++;
continue;
}
/* let's collect the response time */
b = field_start(field_stop(b + 1), TIME_FIELD - SOURCE_FIELD); // avg 115 ns per line
if (!*b) {
if (!time_field) {
b = field_start(line, SOURCE_FIELD + skip_fields); // avg 95 ns per line
if (*b < '0' || *b > '9') {
parse_err++;
continue;
}
time_field = field_start(field_stop(b + 1), TIME_FIELD - SOURCE_FIELD); // avg 115 ns per line
}
if (!*time_field) {
truncated_line(linenum, line);
continue;
}
/* we have the field TIME_FIELD starting at <b>. We'll
/* we have the field TIME_FIELD starting at <time_field>. We'll
* parse the 5 timers to detect errors, it takes avg 55 ns per line.
*/
e = b; err = 0; f = 0;
e = time_field; err = 0; f = 0;
while (!SEP(*e)) {
array[f] = str2ic(e);
if (array[f] < 0) {