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r7392@Kushana: nickm | 2006-08-14 23:50:32 -0400
Only do the expensive version of router_have_minimum_dir_info() when the dir info has changed. Backport candidate, since oprofile suggests that this function and ones it calls account for 25-35% of oprofile samples. svn:r7062
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@ -39,6 +39,8 @@ static routerstatus_t *networkstatus_find_entry(networkstatus_t *ns,
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static local_routerstatus_t *router_get_combined_status_by_nickname(
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const char *nickname,
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int warn_if_unnamed);
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static void update_router_have_minimum_dir_info(void);
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static void router_dir_info_changed(void);
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/****************************************************************************/
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@ -1312,6 +1314,7 @@ routerlist_insert(routerlist_t *rl, routerinfo_t *ri)
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digestmap_set(rl->desc_digest_map, ri->cache_info.signed_descriptor_digest,
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&(ri->cache_info));
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smartlist_add(rl->routers, ri);
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router_dir_info_changed();
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// routerlist_assert_ok(rl);
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}
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@ -1344,6 +1347,7 @@ routerlist_remove(routerlist_t *rl, routerinfo_t *ri, int idx, int make_old)
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return;
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smartlist_del(rl->routers, idx);
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ri_tmp = digestmap_remove(rl->identity_map, ri->cache_info.identity_digest);
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router_dir_info_changed();
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tor_assert(ri_tmp == ri);
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if (make_old && get_options()->DirPort) {
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signed_descriptor_t *sd;
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@ -1387,6 +1391,7 @@ routerlist_replace(routerlist_t *rl, routerinfo_t *ri_old,
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{
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tor_assert(ri_old != ri_new);
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idx = _routerlist_find_elt(rl->routers, ri_old, idx);
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router_dir_info_changed();
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if (idx >= 0) {
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smartlist_set(rl->routers, idx, ri_new);
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} else {
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@ -1540,6 +1545,7 @@ router_set_status(const char *digest, int up)
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if (status) {
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status->status.is_running = up;
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}
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router_dir_info_changed();
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}
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/** Add <b>router</b> to the routerlist, if we don't already have it. Replace
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@ -2255,6 +2261,7 @@ router_set_networkstatus(const char *s, time_t arrived_at,
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(source==NS_FROM_DIR?"downloaded from":"generated for"),
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trusted_dir->description, published);
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networkstatus_list_has_changed = 1;
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router_dir_info_changed();
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smartlist_sort(networkstatus_list, _compare_networkstatus_published_on);
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@ -2296,6 +2303,7 @@ networkstatus_list_clean(time_t now)
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dirserv_set_cached_networkstatus_v2(NULL, ns->identity_digest, 0);
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}
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networkstatus_free(ns);
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router_dir_info_changed();
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}
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}
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@ -2687,6 +2695,7 @@ add_trusted_dir_server(const char *nickname, const char *address,
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ent->fake_status.dir_port = ent->dir_port;
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smartlist_add(trusted_dir_servers, ent);
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router_dir_info_changed();
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}
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/** Free storage held in <b>ds</b> */
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@ -2710,6 +2719,7 @@ clear_trusted_dir_servers(void)
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} else {
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trusted_dir_servers = smartlist_create();
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}
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router_dir_info_changed();
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}
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/** Return 1 if any trusted dir server supports v1 directories,
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@ -2815,6 +2825,8 @@ routers_update_all_from_networkstatus(void)
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(!networkstatus_list_has_changed && !routerstatus_list_has_changed))
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return;
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router_dir_info_changed();
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now = time(NULL);
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if (networkstatus_list_has_changed)
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routerstatus_list_update_from_networkstatus(now);
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@ -2971,8 +2983,10 @@ networkstatus_list_update_recent(time_t now)
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}
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}
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}
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if (changed)
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if (changed) {
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networkstatus_list_has_changed = 1;
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router_dir_info_changed();
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}
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}
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/** Helper for routerstatus_list_update_from_networkstatus: remember how many
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@ -3002,6 +3016,7 @@ routerstatus_list_update_from_networkstatus(time_t now)
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/* compute which network statuses will have a vote now */
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networkstatus_list_update_recent(now);
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router_dir_info_changed();
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if (!networkstatus_list_has_changed)
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return;
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@ -3293,6 +3308,7 @@ routers_update_status_from_networkstatus(smartlist_t *routers,
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rs->next_attempt_at = 0;
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}
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});
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router_dir_info_changed();
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}
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/** For every router descriptor we are currently downloading by descriptor
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@ -3382,13 +3398,13 @@ initiate_descriptor_downloads(routerstatus_t *source,
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* running, or otherwise not a descriptor that we would make any
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* use of even if we had it. Else return 1. */
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static int
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client_would_use_router(routerstatus_t *rs, time_t now)
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client_would_use_router(routerstatus_t *rs, time_t now, or_options_t *options)
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{
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if (rs->published_on + ROUTER_MAX_AGE < now) {
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/* This one is too old to consider. */
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return 0;
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}
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if (!rs->is_running && !get_options()->FetchUselessDescriptors) {
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if (!rs->is_running && !options->FetchUselessDescriptors) {
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/* If we had this router descriptor, we wouldn't even bother using it.
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* But, if we want to have a complete list, fetch it anyway. */
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return 0;
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@ -3412,6 +3428,7 @@ router_list_client_downloadable(void)
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time_t now = time(NULL);
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/* these are just used for logging */
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int n_not_ready = 0, n_in_progress = 0, n_uptodate = 0, n_wouldnt_use = 0;
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or_options_t *options = get_options();
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if (!routerstatus_list)
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return downloadable;
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@ -3423,7 +3440,7 @@ router_list_client_downloadable(void)
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SMARTLIST_FOREACH(routerstatus_list, local_routerstatus_t *, rs,
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{
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routerinfo_t *ri;
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if (!client_would_use_router(&rs->status, now)) {
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if (!client_would_use_router(&rs->status, now, options)) {
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/* We wouldn't want this descriptor even if we got it. */
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++n_wouldnt_use;
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} else if (digestmap_get(downloading, rs->status.descriptor_digest)) {
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@ -3703,21 +3720,45 @@ routerstatus_count_usable_entries(smartlist_t *entries)
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{
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int count = 0;
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time_t now = time(NULL);
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or_options_t *options = get_options();
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SMARTLIST_FOREACH(entries, routerstatus_t *, rs,
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if (client_would_use_router(rs, now)) count++);
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if (client_would_use_router(rs, now, options)) count++);
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return count;
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}
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static int have_min_dir_info = 0;
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static int need_to_update_have_min_dir_info = 1;
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/** Return true iff we have enough networkstatus and router information to
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* start building circuits. Right now, this means "more than half the
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* networkstatus documents, and at least 1/4 of expected routers." */
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//XXX should consider whether we have enough exiting nodes here.
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int
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router_have_minimum_dir_info(void)
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{
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if (need_to_update_have_min_dir_info) {
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update_router_have_minimum_dir_info();
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need_to_update_have_min_dir_info = 0;
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}
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return have_min_dir_info;
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}
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/** DOCDOC
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* Must change when authorities change, networkstatuses change, or list of
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* routerdescs changes.
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*/
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static void
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router_dir_info_changed(void)
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{
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need_to_update_have_min_dir_info = 1;
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}
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/** DOCDOC */
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static void
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update_router_have_minimum_dir_info(void)
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{
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int tot = 0, num_running = 0;
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int n_ns, n_authorities, res, avg;
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static int have_enough = 0;
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if (!networkstatus_list || !routerlist) {
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res = 0;
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goto done;
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@ -3743,18 +3784,18 @@ router_have_minimum_dir_info(void)
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});
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res = smartlist_len(routerlist->routers) >= (avg/4) && num_running > 2;
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done:
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if (res && !have_enough) {
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if (res && !have_min_dir_info) {
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log(LOG_NOTICE, LD_DIR,
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"We now have enough directory information to build circuits.");
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}
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if (!res && have_enough) {
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if (!res && have_min_dir_info) {
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log(LOG_NOTICE, LD_DIR,"Our directory information is no longer up-to-date "
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"enough to build circuits.%s",
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num_running > 2 ? "" : " (Not enough servers seem reachable -- "
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"is your network connection down?)");
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}
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have_enough = res;
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return res;
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need_to_update_have_min_dir_info = 0;
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have_min_dir_info = res;
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}
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/** Return true iff we have downloaded, or attempted to download at least
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