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/*
* blktrace output analysis: generate a timeline & gather statistics
*
* (C) Copyright 2009 Hewlett-Packard Development Company, L.P.
* Alan D. Brunelle (alan.brunelle@hp.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "globals.h"
struct p_live {
struct rb_node rb_node;
struct list_head head;
__u64 dt, ct;
};
struct get_info {
struct p_live_info *plip;
__u64 t_start, t_end;
__u64 tot_live;
FILE *ofp;
double last_0;
int base_y;
};
static struct rb_root p_live_root;
static LIST_HEAD(all_p_lives);
static FILE *do_open(struct d_info *dip)
{
FILE *ofp;
if (do_p_live) {
char *bn = dip ? dip->dip_name : "sys";
char *nm = malloc(strlen(bn) + 16);
sprintf(nm, "%s_live.dat", bn);
ofp = my_fopen(nm, "w");
if (ofp)
add_file(ofp, nm);
else
free(nm);
}
else
ofp = NULL;
return ofp;
}
static inline int inside(struct p_live *plp, __u64 dt, __u64 ct)
{
if (plp->dt <= dt && dt <= plp->ct)
return 1;
if (plp->dt <= ct && ct <= plp->ct)
return 1;
if (dt < plp->dt && plp->ct < ct)
return 1;
return 0;
}
static void __p_live_add(struct rb_root *root, __u64 dt, __u64 ct)
{
struct p_live *plp;
struct rb_node *parent = NULL;
struct rb_node **p = &root->rb_node;
while (*p) {
parent = *p;
plp = rb_entry(parent, struct p_live, rb_node);
if (inside(plp, dt, ct)) {
list_del(&plp->head);
rb_erase(&plp->rb_node, root);
__p_live_add(root, min(plp->dt, dt), max(plp->ct, ct));
free(plp);
return;
}
if (ct < plp->dt)
p = &(*p)->rb_left;
else
p = &(*p)->rb_right;
}
plp = malloc(sizeof(*plp));
plp->dt = dt;
plp->ct = ct;
rb_link_node(&plp->rb_node, parent, p);
rb_insert_color(&plp->rb_node, root);
list_add_tail(&plp->head, &all_p_lives);
}
void *p_live_alloc(void)
{
size_t sz = sizeof(struct rb_root);
return memset(malloc(sz), 0, sz);
}
void p_live_free(void *p)
{
free(p);
}
void p_live_add(struct d_info *dip, __u64 dt, __u64 ct)
{
__p_live_add(dip->p_live_handle, dt, ct);
__p_live_add(&p_live_root, dt, ct);
}
static void p_live_visit(struct rb_node *n, struct get_info *gip)
{
struct p_live *plp = rb_entry(n, struct p_live, rb_node);
if (n->rb_left)
p_live_visit(n->rb_left, gip);
if (gip->ofp) {
float y0 = gip->base_y;
float y1 = gip->base_y + 0.9;
fprintf(gip->ofp, "%.9lf %.1f\n", gip->last_0, y0);
fprintf(gip->ofp, "%.9lf %.1f\n", BIT_TIME(plp->dt), y0);
fprintf(gip->ofp, "%.9lf %.1f\n", BIT_TIME(plp->dt), y1);
fprintf(gip->ofp, "%.9lf %.1f\n", BIT_TIME(plp->ct), y1);
fprintf(gip->ofp, "%.9lf %.1f\n", BIT_TIME(plp->ct), y0);
gip->last_0 = BIT_TIME(plp->ct);
}
gip->plip->nlives++;
gip->tot_live += (plp->ct - plp->dt);
if (gip->t_start < 0.0 || plp->dt < gip->t_start)
gip->t_start = plp->dt;
if (gip->t_end < 0.0 || plp->ct > gip->t_end)
gip->t_end = plp->ct;
if (n->rb_right)
p_live_visit(n->rb_right, gip);
}
struct p_live_info *p_live_get(struct d_info *dip, int base_y)
{
FILE *ofp = do_open(dip);
static struct p_live_info pli;
struct p_live_info *plip = &pli;
struct get_info gi = {
.plip = plip,
.t_start = 0.0,
.t_end = 0.0,
.ofp = ofp,
.base_y = base_y,
};
struct rb_root *root = (dip) ? dip->p_live_handle : &p_live_root;
memset(plip, 0, sizeof(*plip));
if (root->rb_node)
p_live_visit(root->rb_node, &gi);
if (plip->nlives == 0) {
plip->avg_live = plip->avg_lull = plip->p_live = 0.0;
}
else if (plip->nlives == 1) {
plip->avg_lull = 0.0;
plip->p_live = 100.0;
}
else {
double t_time = BIT_TIME(gi.t_end - gi.t_start);
double tot_live = BIT_TIME(gi.tot_live);
plip->p_live = 100.0 * (tot_live / t_time);
plip->avg_live = tot_live / plip->nlives;
plip->avg_lull = (t_time - tot_live) / (plip->nlives - 1);
}
return plip;
}
void p_live_exit(void)
{
struct list_head *p, *q;
list_for_each_safe(p, q, &all_p_lives) {
struct p_live *plp = list_entry(p, struct p_live, head);
list_del(&plp->head);
free(plp);
}
}
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