runtime/map-stat.c - systemtap

Functions defined

Source code

/* -*- linux-c -*-
 * map functions to handle statistics
 * Copyright (C) 2005, 2012 Red Hat Inc.
 *
 * This file is part of systemtap, and is free software.  You can
 * redistribute it and/or modify it under the terms of the GNU General
 * Public License (GPL); either version 2, or (at your option) any
 * later version.
 */

/** @file map-stat.c
 * @brief Map functions to handle statistics.
 */

#include "stat-common.c"

‌static void _stp_map_print_histogram (MAP map, stat_data *sd)
{
    _stp_stat_print_histogram (&map->hist, sd);
}

‌static MAP _stp_map_new_hstat (unsigned max_entries, int wrap, int node_size)
{
    MAP m = _stp_map_new (max_entries, wrap, node_size, -1);
    if (m) {
        m->hist.type = HIST_NONE;
    }
    return m;
}

‌static MAP _stp_map_new_hstat_log (unsigned max_entries, int wrap, int node_size)
{
    MAP m;

    /* the node already has stat_data, just add size for buckets */
    node_size += HIST_LOG_BUCKETS * sizeof(int64_t);
    m = _stp_map_new (max_entries, wrap, node_size, -1);
    if (m) {
        m->hist.type = HIST_LOG;
        m->hist.buckets = HIST_LOG_BUCKETS;
    }
    return m;
}

static MAP
‌_stp_map_new_hstat_linear (unsigned max_entries, int wrap, int node_size,
               int start, int stop, int interval)
{
    MAP m;
    int buckets = _stp_stat_calc_buckets(stop, start, interval);
    if (!buckets)
        return NULL;

    /* the node already has stat_data, just add size for buckets */
    node_size += buckets * sizeof(int64_t);

    m = _stp_map_new (max_entries, wrap, node_size, -1);
    if (m) {
        m->hist.type = HIST_LINEAR;
        m->hist.start = start;
        m->hist.stop = stop;
        m->hist.interval = interval;
        m->hist.buckets = buckets;
    }
    return m;
}


static PMAP
‌_stp_pmap_new_hstat_linear (unsigned max_entries, int wrap, int node_size,
                int start, int stop, int interval)
{
    PMAP pmap;
    int buckets = _stp_stat_calc_buckets(stop, start, interval);
    if (!buckets)
        return NULL;

    /* the node already has stat_data, just add size for buckets */
    node_size += buckets * sizeof(int64_t);

    pmap = _stp_pmap_new (max_entries, wrap, node_size);
    if (pmap) {
        int i;
        MAP m;

        for_each_possible_cpu(i) {
            m = _stp_pmap_get_map (pmap, i);
            MAP_LOCK(m);
            m->hist.type = HIST_LINEAR;
            m->hist.start = start;
            m->hist.stop = stop;
            m->hist.interval = interval;
            m->hist.buckets = buckets;
            MAP_UNLOCK(m);
        }
        /* now set agg map params */
        m = _stp_pmap_get_agg(pmap);
        MAP_LOCK(m);
        m->hist.type = HIST_LINEAR;
        m->hist.start = start;
        m->hist.stop = stop;
        m->hist.interval = interval;
        m->hist.buckets = buckets;
        MAP_UNLOCK(m);
    }
    return pmap;
}

static PMAP
‌_stp_pmap_new_hstat_log (unsigned max_entries, int wrap, int node_size)
{
    PMAP pmap;

    /* the node already has stat_data, just add size for buckets */
    node_size += HIST_LOG_BUCKETS * sizeof(int64_t);
    pmap = _stp_pmap_new (max_entries, wrap, node_size);
    if (pmap) {
        int i;
        MAP m;
        for_each_possible_cpu(i) {
            m = _stp_pmap_get_map (pmap, i);
            MAP_LOCK(m);
            m->hist.type = HIST_LOG;
            m->hist.buckets = HIST_LOG_BUCKETS;
            MAP_UNLOCK(m);
        }
        /* now set agg map params */
        m = _stp_pmap_get_agg(pmap);
        MAP_LOCK(m);
        m->hist.type = HIST_LOG;
        m->hist.buckets = HIST_LOG_BUCKETS;
        MAP_UNLOCK(m);
    }
    return pmap;
}

static PMAP
‌_stp_pmap_new_hstat (unsigned max_entries, int wrap, int node_size)
{
    PMAP pmap = _stp_pmap_new (max_entries, wrap, node_size);
    if (pmap) {
        int i;
        MAP m;
        for_each_possible_cpu(i) {
            m = _stp_pmap_get_map (pmap, i);
            MAP_LOCK(m);
            m->hist.type = HIST_NONE;
            MAP_UNLOCK(m);
        }
        /* now set agg map params */
        m = _stp_pmap_get_agg(pmap);
        MAP_LOCK(m);
        m->hist.type = HIST_NONE;
        MAP_UNLOCK(m);
    }
    return pmap;
}