diff options
Diffstat (limited to 'src/backends.c')
| -rw-r--r-- | src/backends.c | 556 |
1 files changed, 398 insertions, 158 deletions
diff --git a/src/backends.c b/src/backends.c index 1272d0473..3e385cab5 100644 --- a/src/backends.c +++ b/src/backends.c @@ -1,16 +1,51 @@ #include "common.h" +// ---------------------------------------------------------------------------- +// How backends work in netdata: +// +// 1. There is an independent thread that runs at the required interval +// (for example, once every 10 seconds) +// +// 2. Every time it wakes, it calls the backend formatting functions to build +// a buffer of data. This is a very fast, memory only operation. +// +// 3. If the buffer already includes data, the new data are appended. +// If the buffer becomes too big, because the data cannot be sent, a +// log is written and the buffer is discarded. +// +// 4. Then it tries to send all the data. It blocks until all the data are sent +// or the socket returns an error. +// If the time required for this is above the interval, it starts skipping +// intervals, but the calculated values include the entire database, without +// gaps (it remembers the timestamps and continues from where it stopped). +// +// 5. repeats the above forever. +// + #define BACKEND_SOURCE_DATA_AS_COLLECTED 0x00000001 #define BACKEND_SOURCE_DATA_AVERAGE 0x00000002 #define BACKEND_SOURCE_DATA_SUM 0x00000004 -static inline calculated_number backend_calculate_value_from_stored_data(RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options) { + +// ---------------------------------------------------------------------------- +// helper functions for backends + +// calculate the SUM or AVERAGE of a dimension, for any timeframe +// may return NAN if the database does not have any value in the give timeframe + +static inline calculated_number backend_calculate_value_from_stored_data( + RRDSET *st // the chart + , RRDDIM *rd // the dimension + , time_t after // the start timestamp + , time_t before // the end timestamp + , uint32_t options // BACKEND_SOURCE_* bitmap +) { + // find the edges of the rrd database for this chart time_t first_t = rrdset_first_entry_t(st); - time_t last_t = rrdset_last_entry_t(st); + time_t last_t = rrdset_last_entry_t(st); - if(unlikely(before - after < st->update_every && after != after - after % st->update_every)) - // when st->update_every is bigger than the frequency we send data to backend - // skip the iterations that are not aligned to the database + if(unlikely(before < first_t || after > last_t)) + // the chart has not been updated in the wanted timeframe return NAN; // align the time-frame @@ -22,7 +57,7 @@ static inline calculated_number backend_calculate_value_from_stored_data(RRDSET after = first_t; if(unlikely(after > before)) - // this can happen when the st->update_every > before - after + // this can happen when st->update_every > before - after before = after; if(unlikely(before > last_t)) @@ -36,14 +71,20 @@ static inline calculated_number backend_calculate_value_from_stored_data(RRDSET slot, stop_now = 0; for(slot = start_at_slot; !stop_now ; slot--) { + if(unlikely(slot < 0)) slot = st->entries - 1; if(unlikely(slot == stop_at_slot)) stop_now = 1; storage_number n = rd->values[slot]; - if(unlikely(!does_storage_number_exist(n))) continue; + + if(unlikely(!does_storage_number_exist(n))) { + // not collected + continue; + } calculated_number value = unpack_storage_number(n); sum += value; + counter++; } @@ -56,84 +97,295 @@ static inline calculated_number backend_calculate_value_from_stored_data(RRDSET return sum / (calculated_number)counter; } -static inline int format_dimension_collected_graphite_plaintext(BUFFER *b, const char *prefix, RRDHOST *host, const char *hostname, RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options) { + +// discard a response received by a backend +// after logging a simple of it to error.log + +static inline int discard_response(BUFFER *b, const char *backend) { + char sample[1024]; + const char *s = buffer_tostring(b); + char *d = sample, *e = &sample[sizeof(sample) - 1]; + + for(; *s && d < e ;s++) { + char c = *s; + if(unlikely(!isprint(c))) c = ' '; + *d++ = c; + } + *d = '\0'; + + info("Received %zu bytes from %s backend. Ignoring them. Sample: '%s'", buffer_strlen(b), backend, sample); + buffer_flush(b); + return 0; +} + + +// ---------------------------------------------------------------------------- +// graphite backend + +static inline int format_dimension_collected_graphite_plaintext( + BUFFER *b // the buffer to write data to + , const char *prefix // the prefix to use + , RRDHOST *host // the host this chart comes from + , const char *hostname // the hostname (to override host->hostname) + , RRDSET *st // the chart + , RRDDIM *rd // the dimension + , time_t after // the start timestamp + , time_t before // the end timestamp + , uint32_t options // BACKEND_SOURCE_* bitmap +) { (void)host; (void)after; (void)before; (void)options; - buffer_sprintf(b, "%s.%s.%s.%s " COLLECTED_NUMBER_FORMAT " %u\n", prefix, hostname, st->id, rd->id, rd->last_collected_value, (uint32_t)rd->last_collected_time.tv_sec); + + buffer_sprintf( + b + , "%s.%s.%s.%s " COLLECTED_NUMBER_FORMAT " %u\n" + , prefix + , hostname + , st->id + , rd->id + , rd->last_collected_value + , (uint32_t)rd->last_collected_time.tv_sec + ); + return 1; } -static inline int format_dimension_stored_graphite_plaintext(BUFFER *b, const char *prefix, RRDHOST *host, const char *hostname, RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options) { +static inline int format_dimension_stored_graphite_plaintext( + BUFFER *b // the buffer to write data to + , const char *prefix // the prefix to use + , RRDHOST *host // the host this chart comes from + , const char *hostname // the hostname (to override host->hostname) + , RRDSET *st // the chart + , RRDDIM *rd // the dimension + , time_t after // the start timestamp + , time_t before // the end timestamp + , uint32_t options // BACKEND_SOURCE_* bitmap +) { (void)host; + calculated_number value = backend_calculate_value_from_stored_data(st, rd, after, before, options); + if(!isnan(value)) { - buffer_sprintf(b, "%s.%s.%s.%s " CALCULATED_NUMBER_FORMAT " %u\n", prefix, hostname, st->id, rd->id, value, (uint32_t) before); + + buffer_sprintf( + b + , "%s.%s.%s.%s " CALCULATED_NUMBER_FORMAT " %u\n" + , prefix + , hostname + , st->id + , rd->id + , value + , (uint32_t) before + ); + return 1; } return 0; } -static inline int format_dimension_collected_opentsdb_telnet(BUFFER *b, const char *prefix, RRDHOST *host, const char *hostname, RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options) { +static inline int process_graphite_response(BUFFER *b) { + return discard_response(b, "graphite"); +} + + +// ---------------------------------------------------------------------------- +// opentsdb backend + +static inline int format_dimension_collected_opentsdb_telnet( + BUFFER *b // the buffer to write data to + , const char *prefix // the prefix to use + , RRDHOST *host // the host this chart comes from + , const char *hostname // the hostname (to override host->hostname) + , RRDSET *st // the chart + , RRDDIM *rd // the dimension + , time_t after // the start timestamp + , time_t before // the end timestamp + , uint32_t options // BACKEND_SOURCE_* bitmap +) { (void)host; (void)after; (void)before; (void)options; - buffer_sprintf(b, "put %s.%s.%s %u " COLLECTED_NUMBER_FORMAT " host=%s\n", prefix, st->id, rd->id, (uint32_t)rd->last_collected_time.tv_sec, rd->last_collected_value, hostname); + + buffer_sprintf( + b + , "put %s.%s.%s %u " COLLECTED_NUMBER_FORMAT " host=%s\n" + , prefix + , st->id + , rd->id + , (uint32_t)rd->last_collected_time.tv_sec + , rd->last_collected_value + , hostname + ); + return 1; } -static inline int format_dimension_stored_opentsdb_telnet(BUFFER *b, const char *prefix, RRDHOST *host, const char *hostname, RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options) { +static inline int format_dimension_stored_opentsdb_telnet( + BUFFER *b // the buffer to write data to + , const char *prefix // the prefix to use + , RRDHOST *host // the host this chart comes from + , const char *hostname // the hostname (to override host->hostname) + , RRDSET *st // the chart + , RRDDIM *rd // the dimension + , time_t after // the start timestamp + , time_t before // the end timestamp + , uint32_t options // BACKEND_SOURCE_* bitmap +) { (void)host; + calculated_number value = backend_calculate_value_from_stored_data(st, rd, after, before, options); + if(!isnan(value)) { - buffer_sprintf(b, "put %s.%s.%s %u " CALCULATED_NUMBER_FORMAT " host=%s\n", prefix, st->id, rd->id, (uint32_t) before, value, hostname); + + buffer_sprintf( + b + , "put %s.%s.%s %u " CALCULATED_NUMBER_FORMAT " host=%s\n" + , prefix + , st->id + , rd->id + , (uint32_t) before + , value + , hostname + ); + return 1; } return 0; } -static inline int process_graphite_response(BUFFER *b) { - char sample[1024]; - const char *s = buffer_tostring(b); - char *d = sample, *e = &sample[sizeof(sample) - 1]; +static inline int process_opentsdb_response(BUFFER *b) { + return discard_response(b, "opentsdb"); +} - for(; *s && d < e ;s++) { - char c = *s; - if(unlikely(!isprint(c))) c = ' '; - *d++ = c; - } - *d = '\0'; - info("Received %zu bytes from graphite backend. Ignoring them. Sample: '%s'", buffer_strlen(b), sample); - buffer_flush(b); - return 0; +// ---------------------------------------------------------------------------- +// json backend + +static inline int format_dimension_collected_json_plaintext( + BUFFER *b // the buffer to write data to + , const char *prefix // the prefix to use + , RRDHOST *host // the host this chart comes from + , const char *hostname // the hostname (to override host->hostname) + , RRDSET *st // the chart + , RRDDIM *rd // the dimension + , time_t after // the start timestamp + , time_t before // the end timestamp + , uint32_t options // BACKEND_SOURCE_* bitmap +) { + (void)host; + (void)after; + (void)before; + (void)options; + + buffer_sprintf(b, "{" + "\"prefix\":\"%s\"," + "\"hostname\":\"%s\"," + + "\"chart_id\":\"%s\"," + "\"chart_name\":\"%s\"," + "\"chart_family\":\"%s\"," + "\"chart_context\": \"%s\"," + "\"chart_type\":\"%s\"," + "\"units\": \"%s\"," + + "\"id\":\"%s\"," + "\"name\":\"%s\"," + "\"value\":" COLLECTED_NUMBER_FORMAT "," + + "\"timestamp\": %u}\n", + prefix, + hostname, + + st->id, + st->name, + st->family, + st->context, + st->type, + st->units, + + rd->id, + rd->name, + rd->last_collected_value, + + (uint32_t)rd->last_collected_time.tv_sec + ); + + return 1; } -static inline int process_opentsdb_response(BUFFER *b) { - char sample[1024]; - const char *s = buffer_tostring(b); - char *d = sample, *e = &sample[sizeof(sample) - 1]; +static inline int format_dimension_stored_json_plaintext( + BUFFER *b // the buffer to write data to + , const char *prefix // the prefix to use + , RRDHOST *host // the host this chart comes from + , const char *hostname // the hostname (to override host->hostname) + , RRDSET *st // the chart + , RRDDIM *rd // the dimension + , time_t after // the start timestamp + , time_t before // the end timestamp + , uint32_t options // BACKEND_SOURCE_* bitmap +) { + (void)host; - for(; *s && d < e ;s++) { - char c = *s; - if(unlikely(!isprint(c))) c = ' '; - *d++ = c; - } - *d = '\0'; + calculated_number value = backend_calculate_value_from_stored_data(st, rd, after, before, options); - info("Received %zu bytes from opentsdb backend. Ignoring them. Sample: '%s'", buffer_strlen(b), sample); - buffer_flush(b); + if(!isnan(value)) { + buffer_sprintf(b, "{" + "\"prefix\":\"%s\"," + "\"hostname\":\"%s\"," + + "\"chart_id\":\"%s\"," + "\"chart_name\":\"%s\"," + "\"chart_family\":\"%s\"," + "\"chart_context\": \"%s\"," + "\"chart_type\":\"%s\"," + "\"units\": \"%s\"," + + "\"id\":\"%s\"," + "\"name\":\"%s\"," + "\"value\":" CALCULATED_NUMBER_FORMAT "," + + "\"timestamp\": %u}\n", + prefix, + hostname, + + st->id, + st->name, + st->family, + st->context, + st->type, + st->units, + + rd->id, + rd->name, + value, + + (uint32_t)before + ); + + return 1; + } return 0; } +static inline int process_json_response(BUFFER *b) { + return discard_response(b, "json"); +} + + +// ---------------------------------------------------------------------------- +// the backend thread + void *backends_main(void *ptr) { + int default_port = 0; + int sock = -1; struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr; BUFFER *b = buffer_create(1), *response = buffer_create(1); - int (*backend_request_formatter)(BUFFER *b, const char *prefix, RRDHOST *host, const char *hostname, RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options) = NULL; - int (*backend_response_checker)(BUFFER *b) = NULL; + int (*backend_request_formatter)(BUFFER *, const char *, RRDHOST *, const char *, RRDSET *, RRDDIM *, time_t, time_t, uint32_t) = NULL; + int (*backend_response_checker)(BUFFER *) = NULL; info("BACKEND thread created with task id %d", gettid()); @@ -150,22 +402,21 @@ void *backends_main(void *ptr) { .tv_sec = 0, .tv_usec = 0 }; - int default_port = 0; - int sock = -1; uint32_t options; - int enabled = config_get_boolean("backend", "enabled", 0); - const char *source = config_get("backend", "data source", "average"); - const char *type = config_get("backend", "type", "graphite"); - const char *destination = config_get("backend", "destination", "localhost"); - const char *prefix = config_get("backend", "prefix", "netdata"); - const char *hostname = config_get("backend", "hostname", localhost.hostname); - int frequency = (int)config_get_number("backend", "update every", 10); - int buffer_on_failures = (int)config_get_number("backend", "buffer on failures", 10); - long timeoutms = config_get_number("backend", "timeout ms", frequency * 2 * 1000); + int enabled = config_get_boolean(CONFIG_SECTION_BACKEND, "enabled", 0); + const char *source = config_get(CONFIG_SECTION_BACKEND, "data source", "average"); + const char *type = config_get(CONFIG_SECTION_BACKEND, "type", "graphite"); + const char *destination = config_get(CONFIG_SECTION_BACKEND, "destination", "localhost"); + const char *prefix = config_get(CONFIG_SECTION_BACKEND, "prefix", "netdata"); + const char *hostname = config_get(CONFIG_SECTION_BACKEND, "hostname", localhost->hostname); + int frequency = (int)config_get_number(CONFIG_SECTION_BACKEND, "update every", 10); + int buffer_on_failures = (int)config_get_number(CONFIG_SECTION_BACKEND, "buffer on failures", 10); + long timeoutms = config_get_number(CONFIG_SECTION_BACKEND, "timeout ms", frequency * 2 * 1000); // ------------------------------------------------------------------------ // validate configuration options // and prepare for sending data to our backend + if(!enabled || frequency < 1) goto cleanup; @@ -183,23 +434,49 @@ void *backends_main(void *ptr) { goto cleanup; } + if(timeoutms < 1) { + error("BACKED invalid timeout %ld ms given. Assuming %d ms.", timeoutms, frequency * 2 * 1000); + timeoutms = frequency * 2 * 1000; + } + timeout.tv_sec = (timeoutms * 1000) / 1000000; + timeout.tv_usec = (timeoutms * 1000) % 1000000; + + + // ------------------------------------------------------------------------ + // select the backend type + if(!strcmp(type, "graphite") || !strcmp(type, "graphite:plaintext")) { + default_port = 2003; + backend_response_checker = process_graphite_response; + if(options == BACKEND_SOURCE_DATA_AS_COLLECTED) backend_request_formatter = format_dimension_collected_graphite_plaintext; else backend_request_formatter = format_dimension_stored_graphite_plaintext; - backend_response_checker = process_graphite_response; } else if(!strcmp(type, "opentsdb") || !strcmp(type, "opentsdb:telnet")) { + default_port = 4242; + backend_response_checker = process_opentsdb_response; + if(options == BACKEND_SOURCE_DATA_AS_COLLECTED) backend_request_formatter = format_dimension_collected_opentsdb_telnet; else backend_request_formatter = format_dimension_stored_opentsdb_telnet; - backend_response_checker = process_opentsdb_response; + } + else if (!strcmp(type, "json") || !strcmp(type, "json:plaintext")) { + + default_port = 5448; + backend_response_checker = process_json_response; + + if (options == BACKEND_SOURCE_DATA_AS_COLLECTED) + backend_request_formatter = format_dimension_collected_json_plaintext; + else + backend_request_formatter = format_dimension_stored_json_plaintext; + } else { error("Unknown backend type '%s'", type); @@ -211,15 +488,9 @@ void *backends_main(void *ptr) { goto cleanup; } - if(timeoutms < 1) { - error("BACKED invalid timeout %ld ms given. Assuming %d ms.", timeoutms, frequency * 2 * 1000); - timeoutms = frequency * 2 * 1000; - } - timeout.tv_sec = (timeoutms * 1000) / 1000000; - timeout.tv_usec = (timeoutms * 1000) % 1000000; // ------------------------------------------------------------------------ - // prepare the charts for monitoring the backend + // prepare the charts for monitoring the backend operation struct rusage thread; @@ -238,32 +509,23 @@ void *backends_main(void *ptr) { chart_backend_reconnects = 0, chart_backend_latency = 0; - RRDSET *chart_metrics = rrdset_find("netdata.backend_metrics"); - if(!chart_metrics) { - chart_metrics = rrdset_create("netdata", "backend_metrics", NULL, "backend", NULL, "Netdata Buffered Metrics", "metrics", 130600, frequency, RRDSET_TYPE_LINE); - rrddim_add(chart_metrics, "buffered", NULL, 1, 1, RRDDIM_ABSOLUTE); - rrddim_add(chart_metrics, "lost", NULL, 1, 1, RRDDIM_ABSOLUTE); - rrddim_add(chart_metrics, "sent", NULL, 1, 1, RRDDIM_ABSOLUTE); - } + RRDSET *chart_metrics = rrdset_create_localhost("netdata", "backend_metrics", NULL, "backend", NULL, "Netdata Buffered Metrics", "metrics", 130600, frequency, RRDSET_TYPE_LINE); + rrddim_add(chart_metrics, "buffered", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); + rrddim_add(chart_metrics, "lost", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); + rrddim_add(chart_metrics, "sent", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); - RRDSET *chart_bytes = rrdset_find("netdata.backend_bytes"); - if(!chart_bytes) { - chart_bytes = rrdset_create("netdata", "backend_bytes", NULL, "backend", NULL, "Netdata Backend Data Size", "KB", 130610, frequency, RRDSET_TYPE_AREA); - rrddim_add(chart_bytes, "buffered", NULL, 1, 1024, RRDDIM_ABSOLUTE); - rrddim_add(chart_bytes, "lost", NULL, 1, 1024, RRDDIM_ABSOLUTE); - rrddim_add(chart_bytes, "sent", NULL, 1, 1024, RRDDIM_ABSOLUTE); - rrddim_add(chart_bytes, "received", NULL, 1, 1024, RRDDIM_ABSOLUTE); - } + RRDSET *chart_bytes = rrdset_create_localhost("netdata", "backend_bytes", NULL, "backend", NULL, "Netdata Backend Data Size", "KB", 130610, frequency, RRDSET_TYPE_AREA); + rrddim_add(chart_bytes, "buffered", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE); + rrddim_add(chart_bytes, "lost", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE); + rrddim_add(chart_bytes, "sent", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE); + rrddim_add(chart_bytes, "received", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE); - RRDSET *chart_ops = rrdset_find("netdata.backend_ops"); - if(!chart_ops) { - chart_ops = rrdset_create("netdata", "backend_ops", NULL, "backend", NULL, "Netdata Backend Operations", "operations", 130630, frequency, RRDSET_TYPE_LINE); - rrddim_add(chart_ops, "write", NULL, 1, 1, RRDDIM_ABSOLUTE); - rrddim_add(chart_ops, "discard", NULL, 1, 1, RRDDIM_ABSOLUTE); - rrddim_add(chart_ops, "reconnect", NULL, 1, 1, RRDDIM_ABSOLUTE); - rrddim_add(chart_ops, "failure", NULL, 1, 1, RRDDIM_ABSOLUTE); - rrddim_add(chart_ops, "read", NULL, 1, 1, RRDDIM_ABSOLUTE); - } + RRDSET *chart_ops = rrdset_create_localhost("netdata", "backend_ops", NULL, "backend", NULL, "Netdata Backend Operations", "operations", 130630, frequency, RRDSET_TYPE_LINE); + rrddim_add(chart_ops, "write", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); + rrddim_add(chart_ops, "discard", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); + rrddim_add(chart_ops, "reconnect", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); + rrddim_add(chart_ops, "failure", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); + rrddim_add(chart_ops, "read", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); /* * this is misleading - we can only measure the time we need to send data @@ -272,19 +534,14 @@ void *backends_main(void *ptr) { * * issue #1432 and https://www.softlab.ntua.gr/facilities/documentation/unix/unix-socket-faq/unix-socket-faq-2.html * - RRDSET *chart_latency = rrdset_find("netdata.backend_latency"); - if(!chart_latency) { - chart_latency = rrdset_create("netdata", "backend_latency", NULL, "backend", NULL, "Netdata Backend Latency", "ms", 130620, frequency, RRDSET_TYPE_AREA); - rrddim_add(chart_latency, "latency", NULL, 1, 1000, RRDDIM_ABSOLUTE); - } + RRDSET *chart_latency = rrdset_create_localhost("netdata", "backend_latency", NULL, "backend", NULL, "Netdata Backend Latency", "ms", 130620, frequency, RRDSET_TYPE_AREA); + rrddim_add(chart_latency, "latency", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE); */ - RRDSET *chart_rusage = rrdset_find("netdata.backend_thread_cpu"); - if(!chart_rusage) { - chart_rusage = rrdset_create("netdata", "backend_thread_cpu", NULL, "backend", NULL, "NetData Backend Thread CPU usage", "milliseconds/s", 130630, frequency, RRDSET_TYPE_STACKED); - rrddim_add(chart_rusage, "user", NULL, 1, 1000, RRDDIM_INCREMENTAL); - rrddim_add(chart_rusage, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL); - } + RRDSET *chart_rusage = rrdset_create_localhost("netdata", "backend_thread_cpu", NULL, "backend", NULL, "NetData Backend Thread CPU usage", "milliseconds/s", 130630, frequency, RRDSET_TYPE_STACKED); + rrddim_add(chart_rusage, "user", NULL, 1, 1000, RRD_ALGORITHM_INCREMENTAL); + rrddim_add(chart_rusage, "system", NULL, 1, 1000, RRD_ALGORITHM_INCREMENTAL); + // ------------------------------------------------------------------------ // prepare the backend main loop @@ -292,49 +549,49 @@ void *backends_main(void *ptr) { info("BACKEND configured ('%s' on '%s' sending '%s' data, every %d seconds, as host '%s', with prefix '%s')", type, destination, source, frequency, hostname, prefix); usec_t step_ut = frequency * USEC_PER_SEC; - usec_t random_ut = now_realtime_usec() % (step_ut / 2); - time_t before = (time_t)((now_realtime_usec() - step_ut) / USEC_PER_SEC); - time_t after = before; + time_t after = now_realtime_sec(); int failures = 0; + heartbeat_t hb; + heartbeat_init(&hb); for(;;) { - // ------------------------------------------------------------------------ - // wait for the next iteration point - usec_t now_ut = now_realtime_usec(); - usec_t next_ut = now_ut - (now_ut % step_ut) + step_ut; - before = (time_t)(next_ut / USEC_PER_SEC); - - // add a little delay (1/4 of the step) plus some randomness - next_ut += (step_ut / 4) + random_ut; + // ------------------------------------------------------------------------ + // Wait for the next iteration point. + heartbeat_next(&hb, step_ut); + time_t before = now_realtime_sec(); - while(now_ut < next_ut) { - sleep_usec(next_ut - now_ut); - now_ut = now_realtime_usec(); - } // ------------------------------------------------------------------------ // add to the buffer the data we need to send to the backend - RRDSET *st; int pthreadoldcancelstate; if(unlikely(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &pthreadoldcancelstate) != 0)) error("Cannot set pthread cancel state to DISABLE."); - rrdhost_rdlock(&localhost); - for(st = localhost.rrdset_root; st ;st = st->next) { - pthread_rwlock_rdlock(&st->rwlock); + rrd_rdlock(); + RRDHOST *host; + rrdhost_foreach_read(host) { + if(host->rrd_memory_mode == RRD_MEMORY_MODE_NONE) + continue; - RRDDIM *rd; - for(rd = st->dimensions; rd ;rd = rd->next) { - if(rd->last_collected_time.tv_sec >= after) - chart_buffered_metrics += backend_request_formatter(b, prefix, &localhost, hostname, st, rd, after, before, options); - } + rrdhost_rdlock(host); - pthread_rwlock_unlock(&st->rwlock); + RRDSET *st; + rrdset_foreach_read(st, host) { + rrdset_rdlock(st); + + RRDDIM *rd; + rrddim_foreach_read(rd, st) { + if(rd->last_collected_time.tv_sec >= after) + chart_buffered_metrics += backend_request_formatter(b, prefix, host, (host == localhost)?hostname:host->hostname, st, rd, after, before, options); + } + rrdset_unlock(st); + } + rrdhost_unlock(host); } - rrdhost_unlock(&localhost); + rrd_unlock(); if(unlikely(pthread_setcancelstate(pthreadoldcancelstate, NULL) != 0)) error("Cannot set pthread cancel state to RESTORE (%d).", pthreadoldcancelstate); @@ -360,6 +617,10 @@ void *backends_main(void *ptr) { //fprintf(stderr, "\nBACKEND BEGIN:\n%s\nBACKEND END\n", buffer_tostring(b)); // FIXME //fprintf(stderr, "after = %lu, before = %lu\n", after, before); + // prepare for the next iteration + // to add incrementally data to buffer + after = before; + // ------------------------------------------------------------------------ // if we are connected, receive a response, without blocking @@ -399,28 +660,13 @@ void *backends_main(void *ptr) { // if we are not connected, connect to a backend server if(unlikely(sock == -1)) { - usec_t start_ut = now_realtime_usec(); - const char *s = destination; - while(*s) { - const char *e = s; - - // skip separators, moving both s(tart) and e(nd) - while(isspace(*e) || *e == ',') s = ++e; - - // move e(nd) to the first separator - while(*e && !isspace(*e) && *e != ',') e++; - - // is there anything? - if(!*s || s == e) break; - - char buf[e - s + 1]; - strncpyz(buf, s, e - s); - chart_backend_reconnects++; - sock = connect_to(buf, default_port, &timeout); - if(sock != -1) break; - s = e; - } - chart_backend_latency += now_realtime_usec() - start_ut; + usec_t start_ut = now_monotonic_usec(); + size_t reconnects = 0; + + sock = connect_to_one_of(destination, default_port, &timeout, &reconnects, NULL, 0); + + chart_backend_reconnects += reconnects; + chart_backend_latency += now_monotonic_usec() - start_ut; } if(unlikely(netdata_exit)) break; @@ -430,14 +676,14 @@ void *backends_main(void *ptr) { if(likely(sock != -1)) { size_t len = buffer_strlen(b); - usec_t start_ut = now_realtime_usec(); + usec_t start_ut = now_monotonic_usec(); int flags = 0; #ifdef MSG_NOSIGNAL flags += MSG_NOSIGNAL; #endif ssize_t written = send(sock, buffer_tostring(b), len, flags); - chart_backend_latency += now_realtime_usec() - start_ut; + chart_backend_latency += now_monotonic_usec() - start_ut; if(written != -1 && (size_t)written == len) { // we sent the data successfully chart_transmission_successes++; @@ -465,12 +711,6 @@ void *backends_main(void *ptr) { close(sock); sock = -1; } - - // either the buffer is empty - // or is holding the data we couldn't send - // so, make sure the next iteration will continue - // from where we are now - after = before; } else { error("Failed to update database backend '%s'", destination); @@ -495,7 +735,7 @@ void *backends_main(void *ptr) { // ------------------------------------------------------------------------ // update the monitoring charts - if(chart_ops->counter_done) rrdset_next(chart_ops); + if(likely(chart_ops->counter_done)) rrdset_next(chart_ops); rrddim_set(chart_ops, "read", chart_receptions); rrddim_set(chart_ops, "write", chart_transmission_successes); rrddim_set(chart_ops, "discard", chart_data_lost_events); @@ -503,13 +743,13 @@ void *backends_main(void *ptr) { rrddim_set(chart_ops, "reconnect", chart_backend_reconnects); rrdset_done(chart_ops); - if(chart_metrics->counter_done) rrdset_next(chart_metrics); + if(likely(chart_metrics->counter_done)) rrdset_next(chart_metrics); rrddim_set(chart_metrics, "buffered", chart_buffered_metrics); rrddim_set(chart_metrics, "lost", chart_lost_metrics); rrddim_set(chart_metrics, "sent", chart_sent_metrics); rrdset_done(chart_metrics); - if(chart_bytes->counter_done) rrdset_next(chart_bytes); + if(likely(chart_bytes->counter_done)) rrdset_next(chart_bytes); rrddim_set(chart_bytes, "buffered", chart_buffered_bytes); rrddim_set(chart_bytes, "lost", chart_lost_bytes); rrddim_set(chart_bytes, "sent", chart_sent_bytes); @@ -517,13 +757,13 @@ void *backends_main(void *ptr) { rrdset_done(chart_bytes); /* - if(chart_latency->counter_done) rrdset_next(chart_latency); + if(likely(chart_latency->counter_done)) rrdset_next(chart_latency); rrddim_set(chart_latency, "latency", chart_backend_latency); rrdset_done(chart_latency); */ getrusage(RUSAGE_THREAD, &thread); - if(chart_rusage->counter_done) rrdset_next(chart_rusage); + if(likely(chart_rusage->counter_done)) rrdset_next(chart_rusage); rrddim_set(chart_rusage, "user", thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec); rrddim_set(chart_rusage, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec); rrdset_done(chart_rusage); |