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haproxy/contrib/halog/halog.c

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/*
* haproxy log time reporter
*
* Copyright 2000-2009 Willy Tarreau <w@1wt.eu>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
/*
* gcc -O2 -o halog2 halog2.c -Iinclude src/ebtree.c src/eb32tree.c fgets2.c
*
* Usage:
* $0 [ min_delay [ min_count [ field_shift ]]] < haproxy.log
* Note: if min_delay < 0, it only outputs lines with status codes 5xx.
*/
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <common/eb32tree.h>
#define ACCEPT_FIELD 6
#define TIME_FIELD 9
#define STATUS_FIELD 10
#define CONN_FIELD 15
#define MAXLINE 16384
#define QBITS 4
#define SKIP_CHAR(p,c) do { while (1) if (!*p) break; else if (*(p++) == c) break; } while (0)
/* [0] = err/date, [1] = req, [2] = conn, [3] = resp, [4] = data */
static struct eb_root timers[5] = {
EB_ROOT_UNIQUE, EB_ROOT_UNIQUE, EB_ROOT_UNIQUE,
EB_ROOT_UNIQUE, EB_ROOT_UNIQUE,
};
struct timer {
struct eb32_node node;
unsigned int count;
};
#define FILT_COUNT_ONLY 0x01
#define FILT_INVERT 0x02
#define FILT_QUIET 0x04
#define FILT_ERRORS_ONLY 0x08
#define FILT_ACC_DELAY 0x10
#define FILT_ACC_COUNT 0x20
#define FILT_GRAPH_TIMERS 0x40
#define FILT_PERCENTILE 0x80
unsigned int filter = 0;
unsigned int filter_invert = 0;
const char *line;
const char *fgets2(FILE *stream);
void die(const char *msg)
{
fprintf(stderr,
"%s"
"Usage: halog [-c] [-v] [-gt] [-pct] [-s <skip>] [-e] [-ad <delay>] [-ac <count>] < file.log\n"
"\n",
msg ? msg : ""
);
exit(1);
}
/* return pointer to first char not part of current field starting at <p>. */
const char *field_stop(const char *p)
{
unsigned char c;
while (1) {
c = *(p++);
if (c > ' ')
continue;
if (c == ' ' || c == '\t' || c == 0)
break;
}
return p - 1;
}
/* return field <field> (starting from 1) in string <p>. Only consider
* contiguous spaces (or tabs) as one delimiter. May return pointer to
* last char if field is not found. Equivalent to awk '{print $field}'.
*/
const char *field_start(const char *p, int field)
{
unsigned char c;
while (1) {
/* skip spaces */
while (1) {
c = *p;
if (c > ' ')
break;
if (c == ' ' || c == '\t')
goto next;
if (!c) /* end of line */
return p;
/* other char => new field */
break;
next:
p++;
}
/* start of field */
field--;
if (!field)
return p;
/* skip this field */
while (1) {
c = *(p++);
if (c > ' ')
continue;
if (c == ' ' || c == '\t')
break;
if (c == '\0')
return p;
}
}
}
/* keep only the <bits> higher bits of <i> */
static inline unsigned int quantify_u32(unsigned int i, int bits)
{
int high;
if (!bits)
return 0;
if (i)
high = fls_auto(i); // 1 to 32
else
high = 0;
if (high <= bits)
return i;
return i & ~((1 << (high - bits)) - 1);
}
/* keep only the <bits> higher bits of the absolute value of <i>, as well as
* its sign. */
static inline int quantify(int i, int bits)
{
if (i >= 0)
return quantify_u32(i, bits);
else
return -quantify_u32(-i, bits);
}
/* Insert timer value <v> into tree <r>. A pre-allocated node must be passed
* in <alloc>. It may be NULL, in which case the function will allocate it
* itself. It will be reset to NULL once consumed. The caller is responsible
* for freeing the node once not used anymore. The node where the value was
* inserted is returned.
*/
struct timer *insert_timer(struct eb_root *r, struct timer **alloc, int v)
{
struct timer *t = *alloc;
struct eb32_node *n;
if (!t) {
t = calloc(sizeof(*t), 1);
if (unlikely(!t)) {
fprintf(stderr, "%s: not enough memory\n", __FUNCTION__);
exit(1);
}
}
t->node.key = quantify(v, QBITS); // keep only the higher QBITS bits
n = eb32i_insert(r, &t->node);
if (n == &t->node)
t = NULL; /* node inserted, will malloc next time */
*alloc = t;
return container_of(n, struct timer, node);
}
/* Insert value value <v> into tree <r>. A pre-allocated node must be passed
* in <alloc>. It may be NULL, in which case the function will allocate it
* itself. It will be reset to NULL once consumed. The caller is responsible
* for freeing the node once not used anymore. The node where the value was
* inserted is returned.
*/
struct timer *insert_value(struct eb_root *r, struct timer **alloc, int v)
{
struct timer *t = *alloc;
struct eb32_node *n;
if (!t) {
t = calloc(sizeof(*t), 1);
if (unlikely(!t)) {
fprintf(stderr, "%s: not enough memory\n", __FUNCTION__);
exit(1);
}
}
t->node.key = v;
n = eb32i_insert(r, &t->node);
if (n == &t->node)
t = NULL; /* node inserted, will malloc next time */
*alloc = t;
return container_of(n, struct timer, node);
}
int str2ic(const char *s)
{
int i = 0;
int j, k;
if (*s != '-') {
/* positive number */
while (1) {
j = (*s++) - '0';
k = i * 10;
if ((unsigned)j > 9)
break;
i = k + j;
}
} else {
/* negative number */
s++;
while (1) {
j = (*s++) - '0';
k = i * 10;
if ((unsigned)j > 9)
break;
i = k - j;
}
}
return i;
}
/* Equivalent to strtoul with a length. */
static inline unsigned int __strl2ui(const char *s, int len)
{
unsigned int i = 0;
while (len-- > 0) {
i = i * 10 - '0';
i += (unsigned char)*s++;
}
return i;
}
unsigned int strl2ui(const char *s, int len)
{
return __strl2ui(s, len);
}
/* Convert "[04/Dec/2008:09:49:40.555]" to an integer equivalent to the time of
* the day in milliseconds. It returns -1 for all unparsable values. The parser
* looks ugly but gcc emits far better code that way.
*/
int convert_date(const char *field)
{
unsigned int h, m, s, ms;
unsigned char c;
const char *b, *e;
h = m = s = ms = 0;
e = field;
/* skip the date */
while (1) {
c = *(e++);
if (c == ':')
break;
if (!c)
goto out_err;
}
/* hour + ':' */
b = e;
while (1) {
c = *(e++) - '0';
if (c > 9)
break;
h = h * 10 + c;
}
if (c == (unsigned char)(0 - '0'))
goto out_err;
/* minute + ':' */
b = e;
while (1) {
c = *(e++) - '0';
if (c > 9)
break;
m = m * 10 + c;
}
if (c == (unsigned char)(0 - '0'))
goto out_err;
/* second + '.' or ']' */
b = e;
while (1) {
c = *(e++) - '0';
if (c > 9)
break;
s = s * 10 + c;
}
if (c == (unsigned char)(0 - '0'))
goto out_err;
/* if there's a '.', we have milliseconds */
if (c == (unsigned char)('.' - '0')) {
/* millisecond second + ']' */
b = e;
while (1) {
c = *(e++) - '0';
if (c > 9)
break;
ms = ms * 10 + c;
}
if (c == (unsigned char)(0 - '0'))
goto out_err;
}
return (((h * 60) + m) * 60 + s) * 1000 + ms;
out_err:
return -1;
}
void truncated_line(int linenum, const char *line)
{
if (!(filter & FILT_QUIET))
fprintf(stderr, "Truncated line %d: %s\n", linenum, line);
}
int main(int argc, char **argv)
{
const char *b, *e, *p;
const char *output_file = NULL;
int f, tot, last, linenum, err, parse_err;
struct timer *t = NULL, *t2;
struct eb32_node *n;
int val, test;
int array[5];
int filter_acc_delay = 0, filter_acc_count = 0;
int skip_fields = 1;
argc--; argv++;
while (argc > 0) {
if (*argv[0] != '-')
break;
if (strcmp(argv[0], "-ad") == 0) {
if (argc < 2) die("missing option for -ad");
argc--; argv++;
filter |= FILT_ACC_DELAY;
filter_acc_delay = atol(*argv);
}
else if (strcmp(argv[0], "-ac") == 0) {
if (argc < 2) die("missing option for -ac");
argc--; argv++;
filter |= FILT_ACC_COUNT;
filter_acc_count = atol(*argv);
}
else if (strcmp(argv[0], "-s") == 0) {
if (argc < 2) die("missing option for -s");
argc--; argv++;
skip_fields = atol(*argv);
}
else if (strcmp(argv[0], "-e") == 0)
filter |= FILT_ERRORS_ONLY;
else if (strcmp(argv[0], "-c") == 0)
filter |= FILT_COUNT_ONLY;
else if (strcmp(argv[0], "-q") == 0)
filter |= FILT_QUIET;
else if (strcmp(argv[0], "-v") == 0)
filter_invert = !filter_invert;
else if (strcmp(argv[0], "-gt") == 0)
filter |= FILT_GRAPH_TIMERS;
else if (strcmp(argv[0], "-pct") == 0)
filter |= FILT_PERCENTILE;
else if (strcmp(argv[0], "-o") == 0) {
if (output_file)
die("Fatal: output file name already specified.\n");
if (argc < 2)
die("Fatal: missing output file name.\n");
output_file = argv[1];
}
argc--;
argv++;
}
if (!filter)
die("No action specified.\n");
if (filter & FILT_ACC_COUNT && !filter_acc_count)
filter_acc_count=1;
if (filter & FILT_ACC_DELAY && !filter_acc_delay)
filter_acc_delay = 1;
linenum = 0;
tot = 0;
parse_err = 0;
while ((line = fgets2(stdin)) != NULL) {
linenum++;
if (filter & FILT_ERRORS_ONLY) {
/* only report erroneous status codes */
b = field_start(line, STATUS_FIELD + skip_fields);
if (!*b) {
truncated_line(linenum, line);
continue;
}
if (*b == '-') {
test = 1;
} else {
val = strl2ui(b, 3);
test = (val >= 500 && val <= 599);
}
test ^= filter_invert;
if (test) {
tot++;
if (!(filter & FILT_COUNT_ONLY))
puts(line);
}
continue;
}
if (filter & (FILT_ACC_COUNT|FILT_ACC_DELAY)) {
b = field_start(line, ACCEPT_FIELD + skip_fields);
if (!*b) {
truncated_line(linenum, line);
continue;
}
tot++;
val = convert_date(b);
//printf("date=%s => %d\n", b, val);
if (val < 0) {
parse_err++;
continue;
}
t2 = insert_value(&timers[0], &t, val);
t2->count++;
continue;
}
if (filter & (FILT_GRAPH_TIMERS|FILT_PERCENTILE)) {
int f;
b = field_start(line, TIME_FIELD + skip_fields);
if (!*b) {
truncated_line(linenum, line);
continue;
}
e = field_stop(b + 1);
/* we have field TIME_FIELD in [b]..[e-1] */
p = b;
err = 0;
for (f = 0; f < 5 && *p; f++) {
array[f] = str2ic(p);
if (array[f] < 0) {
array[f] = -1;
err = 1;
}
SKIP_CHAR(p, '/');
}
if (f < 5) {
parse_err++;
continue;
}
/* if we find at least one negative time, we count one error
* with a time equal to the total session time. This will
* emphasize quantum timing effects associated to known
* timeouts. Note that on some buggy machines, it is possible
* that the total time is negative, hence the reason to reset
* it.
*/
if (filter & FILT_GRAPH_TIMERS) {
if (err) {
if (array[4] < 0)
array[4] = -1;
t2 = insert_timer(&timers[0], &t, array[4]); // total time
t2->count++;
} else {
int v;
t2 = insert_timer(&timers[1], &t, array[0]); t2->count++; // req
t2 = insert_timer(&timers[2], &t, array[2]); t2->count++; // conn
t2 = insert_timer(&timers[3], &t, array[3]); t2->count++; // resp
v = array[4] - array[0] - array[1] - array[2] - array[3]; // data time
if (v < 0 && !(filter & FILT_QUIET))
fprintf(stderr, "ERR: %s (%d %d %d %d %d => %d)\n",
line, array[0], array[1], array[2], array[3], array[4], v);
t2 = insert_timer(&timers[4], &t, v); t2->count++;
tot++;
}
} else { /* percentile */
if (err) {
if (array[4] < 0)
array[4] = -1;
t2 = insert_value(&timers[0], &t, array[4]); // total time
t2->count++;
} else {
int v;
t2 = insert_value(&timers[1], &t, array[0]); t2->count++; // req
t2 = insert_value(&timers[2], &t, array[2]); t2->count++; // conn
t2 = insert_value(&timers[3], &t, array[3]); t2->count++; // resp
v = array[4] - array[0] - array[1] - array[2] - array[3]; // data time
if (v < 0 && !(filter & FILT_QUIET))
fprintf(stderr, "ERR: %s (%d %d %d %d %d => %d)\n",
line, array[0], array[1], array[2], array[3], array[4], v);
t2 = insert_value(&timers[4], &t, v); t2->count++;
tot++;
}
}
continue;
}
/* all other cases mean we just want to count lines */
tot++;
}
if (t)
free(t);
if (filter & FILT_COUNT_ONLY) {
printf("%d\n", tot);
exit(0);
}
if (filter & FILT_ERRORS_ONLY)
exit(0);
if (filter & (FILT_ACC_COUNT|FILT_ACC_DELAY)) {
/* sort and count all timers. Output will look like this :
* <accept_date> <delta_ms from previous one> <nb entries>
*/
n = eb32_first(&timers[0]);
if (n)
last = n->key;
while (n) {
unsigned int d, h, m, s, ms;
t = container_of(n, struct timer, node);
h = n->key;
d = h - last;
last = h;
if (d >= filter_acc_delay && t->count >= filter_acc_count) {
ms = h % 1000; h = h / 1000;
s = h % 60; h = h / 60;
m = h % 60; h = h / 60;
tot++;
printf("%02d:%02d:%02d.%03d %d %d %d\n", h, m, s, ms, last, d, t->count);
}
n = eb32_next(n);
}
}
else if (filter & FILT_GRAPH_TIMERS) {
/* sort all timers */
for (f = 0; f < 5; f++) {
struct eb32_node *n;
int val;
val = 0;
n = eb32_first(&timers[f]);
while (n) {
int i;
double d;
t = container_of(n, struct timer, node);
last = n->key;
val = t->count;
i = (last < 0) ? -last : last;
i = fls_auto(i) - QBITS;
if (i > 0)
d = val / (double)(1 << i);
else
d = val;
if (d > 0.0) {
printf("%d %d %f\n", f, last, d+1.0);
tot++;
}
n = eb32_next(n);
}
}
}
else if (filter & FILT_PERCENTILE) {
/* report timers by percentile :
* <percent> <total> <max_req_time> <max_conn_time> <max_resp_time> <max_data_time>
* We don't count errs.
*/
struct eb32_node *n[5];
unsigned long cum[5];
double step;
for (f = 1; f < 5; f++) {
n[f] = eb32_first(&timers[f]);
cum[f] = container_of(n[f], struct timer, node)->count;
}
for (step = 1; step <= 1000;) {
unsigned int thres = tot * (step / 1000.0);
printf("%3.1f %d ", step/10.0, thres);
for (f = 1; f < 5; f++) {
struct eb32_node *next;
while (cum[f] < thres) {
/* need to find other keys */
next = eb32_next(n[f]);
if (!next)
break;
n[f] = next;
cum[f] += container_of(next, struct timer, node)->count;
}
/* value still within $step % of total */
printf("%d ", n[f]->key);
}
putchar('\n');
if (step >= 100 && step < 900)
step += 50; // jump 5% by 5% between those steps.
else if (step >= 20 && step < 980)
step += 10;
else
step += 1;
}
}
if (!(filter & FILT_QUIET))
fprintf(stderr, "%d lines in, %d lines out, %d parsing errors\n",
linenum, tot, parse_err);
exit(0);
}
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/
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