From: Florian Forster Date: Wed, 22 Dec 2010 10:49:30 +0000 (+0100) Subject: Use a fixed time-interval for values rather than transfering the time for each value. X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=13e2e7eee1e7f605a291c74294766de464a86dd9;p=collection4.git Use a fixed time-interval for values rather than transfering the time for each value. --- diff --git a/share/collection.js b/share/collection.js index 63bfd08..20af9cb 100644 --- a/share/collection.js +++ b/share/collection.js @@ -140,15 +140,18 @@ function instance_draw (inst, def, data) var j; var x = []; var y = []; + var x_val; + + x_val = ds.first_value_time; for (j = 0; j < ds.data.length; j++) { - var dp = ds.data[j]; - var t = dp[0]; - var v = dp[1]; + var y_val = ds.data[j]; + + x.push (x_val); + y.push (y_val); - x.push (t); - y.push (v); + x_val += ds.interval; } x_data.push (x); diff --git a/src/data_provider.h b/src/data_provider.h index 87025f2..08cff9a 100644 --- a/src/data_provider.h +++ b/src/data_provider.h @@ -47,7 +47,8 @@ typedef int (*dp_list_get_ident_ds_names_callback) (graph_ident_t *, /* Callback passed to the "get_ident_data" function. */ typedef int (*dp_get_ident_data_callback) (graph_ident_t *, const char *ds_name, - const dp_data_point_t *dp, size_t dp_num, + dp_time_t first_value_time, dp_time_t interval, + size_t data_points_num, double *data_points, void *); struct data_provider_s diff --git a/src/dp_rrdtool.c b/src/dp_rrdtool.c index 78554c7..624d3ad 100644 --- a/src/dp_rrdtool.c +++ b/src/dp_rrdtool.c @@ -291,12 +291,13 @@ static int get_ident_data (void *priv, rrd_value_t *data; int status; - unsigned long ds_index; - unsigned long data_index; - unsigned long data_length; + dp_time_t first_value_time; + dp_time_t interval; + size_t data_points_num; + double *data_points = NULL; - dp_data_point_t *dp = NULL; - size_t dp_num = 0; + unsigned long ds_index; + size_t i; status = ident_to_rrdfile (ident, config, filename, sizeof (filename)); if (status != 0) @@ -322,7 +323,7 @@ static int get_ident_data (void *priv, free (ds_namv[i]); \ free (ds_namv); \ free (data); \ - free (dp); \ + free (data_points); \ return (ret_status); \ } while (0) @@ -333,24 +334,23 @@ static int get_ident_data (void *priv, if (ds_index >= ds_count) BAIL_OUT (ENOENT); - /* Number of data points returned. */ - data_length = (rrd_end - rrd_start) / step; - - dp_num = (size_t) data_length; - dp = calloc (dp_num, sizeof (*dp)); - if (dp == NULL) + memset (&first_value_time, 0, sizeof (first_value_time)); + first_value_time.tv_sec = rrd_start; + memset (&interval, 0, sizeof (interval)); + interval.tv_sec = (time_t) step; + data_points_num = (size_t) ((rrd_end - rrd_start) / step); + data_points = calloc (data_points_num, sizeof (*data_points)); + if (data_points == NULL) BAIL_OUT (ENOMEM); - for (data_index = 0; data_index < data_length; data_index++) + for (i = 0; i < data_points_num; i++) { - unsigned long index = (ds_count * data_index) + ds_index; - - dp[data_index].time.tv_sec = rrd_start + (data_index * step); - dp[data_index].time.tv_nsec = 0; - dp[data_index].value = (double) data[index]; + unsigned long index = (ds_count * ((unsigned long) i)) + ds_index; + data_points[i] = (double) data[index]; } - status = (*cb) (ident, ds_name, dp, dp_num, ud); + status = (*cb) (ident, ds_name, first_value_time, interval, + data_points_num, data_points, ud); if (status != 0) BAIL_OUT (status); diff --git a/src/graph_ident.c b/src/graph_ident.c index 24f89c5..02e1aaa 100644 --- a/src/graph_ident.c +++ b/src/graph_ident.c @@ -555,40 +555,65 @@ typedef struct ident_data_to_json__data_s ident_data_to_json__data_t; static int ident_data_to_json__get_ident_data ( __attribute__((unused)) graph_ident_t *ident, /* {{{ */ __attribute__((unused)) const char *ds_name, - const dp_data_point_t *dp, size_t dp_num, + dp_time_t first_value_time, dp_time_t interval, + size_t data_points_num, double *data_points, void *user_data) { ident_data_to_json__data_t *data = user_data; size_t i; + double first_value_time_double; + double interval_double; + /* TODO: Make points_num_limit configurable. */ /* points_num_limit: The number of data-points to send at least. */ size_t points_num_limit = 400; size_t points_consolidate; - if (dp_num <= points_num_limit) + first_value_time_double = ((double) first_value_time.tv_sec) + + (((double) first_value_time.tv_nsec) / 1000000000.0); + interval_double = ((double) interval.tv_sec) + + (((double) interval.tv_nsec) / 1000000000.0); + + if (data_points_num <= points_num_limit) points_consolidate = 1; else - points_consolidate = dp_num / points_num_limit; + points_consolidate = data_points_num / points_num_limit; + + if (points_consolidate > 1) + { + size_t offset = data_points_num % points_consolidate; + + first_value_time_double += ((double) offset) * interval_double; + interval_double *= ((double) points_consolidate); + } + + yajl_gen_map_open (data->handler); + + yajl_gen_string_cast (data->handler, "first_value_time", strlen ("first_value_time")); + yajl_gen_double (data->handler, first_value_time_double); + yajl_gen_string_cast (data->handler, "interval", strlen ("interval")); + yajl_gen_double (data->handler, interval_double); + + yajl_gen_string_cast (data->handler, "data", strlen ("data")); yajl_gen_array_open (data->handler); - for (i = (dp_num % points_consolidate); i < dp_num; i += points_consolidate) + for (i = (data_points_num % points_consolidate); + i < data_points_num; + i += points_consolidate) { size_t j; double sum = 0.0; long num = 0; - yajl_gen_array_open (data->handler); - yajl_gen_integer (data->handler, (long) dp[i].time.tv_sec); - for (j = 0; j < points_consolidate; j++) { - if (isnan (dp[i+j].value)) + if (isnan (data_points[i+j])) continue; - sum += dp[i+j].value; + sum += data_points[i+j]; num++; } @@ -596,8 +621,6 @@ static int ident_data_to_json__get_ident_data ( yajl_gen_null (data->handler); else yajl_gen_double (data->handler, sum / ((double) num)); - - yajl_gen_array_close (data->handler); } yajl_gen_array_close (data->handler); @@ -620,7 +643,6 @@ static int ident_data_to_json__get_ds_name (graph_ident_t *ident, /* {{{ */ yajl_gen_string_cast (data->handler, "data_source", strlen ("data_source")); yajl_gen_string_cast (data->handler, ds_name, strlen (ds_name)); - yajl_gen_string_cast (data->handler, "data", strlen ("data")); status = data_provider_get_ident_data (ident, ds_name, data->begin, data->end, ident_data_to_json__get_ident_data,