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[core] gw_host_get() comment out devel debugging 

gw_host_get() comment out devel debugging trace
use variables within smaller scopes
master
Glenn Strauss 12 months ago
parent
b33d779865
commit
d38d5b4b48
1 changed files with 60 additions and 74 deletions
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  1. 134
      src/gw_backend.c

134
src/gw_backend.c
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@ -816,89 +816,69 @@ gw_hash(const char *str, const uint32_t len, uint32_t hash)
}
static gw_host * gw_host_get(request_st * const r, gw_extension *extension, int balance, int debug) {
gw_host *host;
buffer *dst_addr_buf;
uint32_t last_max = UINT32_MAX;
uint32_t base_hash = DJBHASH_INIT;
int max_usage = INT_MAX;
int ndx = -1;
uint32_t k;
const int ext_used = (int)extension->used;
if (extension->used <= 1) {
if (1 == extension->used && extension->hosts[0]->active_procs > 0) {
if (ext_used <= 1) {
if (1 == ext_used && extension->hosts[0]->active_procs > 0)
ndx = 0;
}
} else switch(balance) {
case GW_BALANCE_HASH:
/* hash balancing */
if (debug) {
log_error(r->conf.errh, __FILE__, __LINE__,
"proxy - used hash balancing, hosts: %u", extension->used);
}
base_hash = gw_hash(BUF_PTR_LEN(&r->uri.path), base_hash);
base_hash = gw_hash(BUF_PTR_LEN(&r->uri.authority), base_hash);
for (k = 0, ndx = -1, last_max = UINT32_MAX; k < extension->used; ++k) {
host = extension->hosts[k];
}
else {
/*const char *balancing = "";*/
switch(balance) {
case GW_BALANCE_HASH:
{ /* hash balancing */
const uint32_t base_hash =
gw_hash(BUF_PTR_LEN(&r->uri.authority),
gw_hash(BUF_PTR_LEN(&r->uri.path), DJBHASH_INIT));
uint32_t last_max = UINT32_MAX;
for (int k = 0; k < ext_used; ++k) {
const gw_host * const host = extension->hosts[k];
if (0 == host->active_procs) continue;
const uint32_t cur_max = base_hash ^ host->gw_hash;
#if 0
if (debug) {
log_error(r->conf.errh, __FILE__, __LINE__,
"proxy - election: %s %s %s %u", r->uri.path.ptr,
host->host ? host->host->ptr : "",
r->uri.authority.ptr, cur_max);
}
#endif
if (last_max < cur_max || last_max == UINT32_MAX) {
last_max = cur_max;
ndx = k;
}
}
/*balancing = "hash";*/
break;
case GW_BALANCE_LEAST_CONNECTION:
/* fair balancing */
if (debug) {
log_error(r->conf.errh, __FILE__, __LINE__,
"proxy - used least connection");
}
for (k = 0, ndx = -1, max_usage = INT_MAX; k < extension->used; ++k) {
host = extension->hosts[k];
}
case GW_BALANCE_LEAST_CONNECTION:
{ /* fair balancing */
for (int k = 0, max_usage = INT_MAX; k < ext_used; ++k) {
const gw_host * const host = extension->hosts[k];
if (0 == host->active_procs) continue;
if (host->load < max_usage) {
max_usage = host->load;
ndx = k;
}
}
/*balancing = "least connection";*/
break;
case GW_BALANCE_RR:
/* round robin */
if (debug) {
log_error(r->conf.errh, __FILE__, __LINE__,
"proxy - used round-robin balancing");
}
/* just to be sure */
force_assert(extension->used < INT_MAX);
host = extension->hosts[0];
}
case GW_BALANCE_RR:
{ /* round robin */
const gw_host *host = extension->hosts[0];
/* Use last_used_ndx from first host in list */
k = extension->last_used_ndx;
int k = extension->last_used_ndx;
ndx = k + 1; /* use next host after the last one */
if (ndx < 0) ndx = 0;
/* Search first active host after last_used_ndx */
while (ndx < (int) extension->used
while (ndx < ext_used
&& 0 == (host = extension->hosts[ndx])->active_procs) ++ndx;
if (ndx >= (int) extension->used) {
if (ndx >= ext_used) {
/* didn't find a higher id, wrap to the start */
for (ndx = 0; ndx <= (int) k; ++ndx) {
host = extension->hosts[ndx];
@ -912,56 +892,62 @@ static gw_host * gw_host_get(request_st * const r, gw_extension *extension, int
/* Save new index for next round */
extension->last_used_ndx = ndx;
/*balancing = "round-robin";*/
break;
case GW_BALANCE_STICKY:
/* source sticky balancing */
dst_addr_buf = r->con->dst_addr_buf;
if (debug) {
log_error(r->conf.errh, __FILE__, __LINE__,
"proxy - used sticky balancing, hosts: %u", extension->used);
}
base_hash = gw_hash(BUF_PTR_LEN(dst_addr_buf), base_hash);
for (k = 0, ndx = -1, last_max = UINT32_MAX; k < extension->used; ++k) {
host = extension->hosts[k];
}
case GW_BALANCE_STICKY:
{ /* source sticky balancing */
const buffer * const dst_addr_buf = r->con->dst_addr_buf;
const uint32_t base_hash =
gw_hash(BUF_PTR_LEN(dst_addr_buf), DJBHASH_INIT);
uint32_t last_max = UINT32_MAX;
for (int k = 0; k < ext_used; ++k) {
const gw_host * const host = extension->hosts[k];
if (0 == host->active_procs) continue;
const uint32_t cur_max = base_hash ^ host->gw_hash ^ host->port;
#if 0
if (debug) {
log_error(r->conf.errh, __FILE__, __LINE__,
"proxy - election: %s %s %hu %ld", dst_addr_buf->ptr,
"proxy - election: %s %s %hu %u", dst_addr_buf->ptr,
host->host ? host->host->ptr : "",
host->port, cur_max);
}
#endif
if (last_max < cur_max || last_max == UINT32_MAX) {
last_max = cur_max;
ndx = k;
}
}
/*balancing = "sticky";*/
break;
default:
}
default:
break;
}
#if 0
if (debug) {
log_error(r->conf.errh, __FILE__, __LINE__,
"gw - balancing: %s, hosts: %d", balancing, ext_used);
}
#endif
}
if (-1 != ndx) {
if (__builtin_expect( (-1 != ndx), 1)) {
/* found a server */
host = extension->hosts[ndx];
if (debug) {
gw_host * const host = extension->hosts[ndx];
log_error(r->conf.errh, __FILE__, __LINE__,
"gw - found a host %s %hu",
host->host ? host->host->ptr : "", host->port);
return host;
}
return host;
return extension->hosts[ndx];
} else if (0 == r->con->srv->srvconf.max_worker) {
/* special-case adaptive spawning and 0 == host->min_procs */
for (k = 0; k < extension->used; ++k) {
host = extension->hosts[k];
for (int k = 0; k < ext_used; ++k) {
gw_host * const host = extension->hosts[k];
if (0 == host->min_procs && 0 == host->num_procs && host->bin_path){
gw_proc_spawn(host, r->con->srv->errh, debug);
if (host->num_procs) return host;

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