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/*
Copyright (C) 2009 Red Hat, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#define _GNU_SOURCE
#include <config.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <spice/stats.h>
#define TAB_LEN 4
#define VALUE_TABS 7
#define INVALID_STAT_REF (~(uint32_t)0)
static SpiceStat *reds_stat = NULL;
static uint64_t *values = NULL;
void print_stat_tree(int32_t node_index, int depth)
{
SpiceStatNode *node = &reds_stat->nodes[node_index];
int i;
if ((node->flags & SPICE_STAT_NODE_MASK_SHOW) == SPICE_STAT_NODE_MASK_SHOW) {
printf("%*s%s", depth * TAB_LEN, "", node->name);
if (node->flags & SPICE_STAT_NODE_FLAG_VALUE) {
printf(":%*s%llu (%llu)\n", (VALUE_TABS - depth) * TAB_LEN - strlen(node->name) - 1, "",
node->value, node->value - values[node_index]);
values[node_index] = node->value;
} else {
printf("\n");
if (node->first_child_index != INVALID_STAT_REF) {
print_stat_tree(node->first_child_index, depth + 1);
}
}
}
if (node->next_sibling_index != INVALID_STAT_REF) {
print_stat_tree(node->next_sibling_index, depth);
}
}
int main(int argc, char **argv)
{
char *shm_name;
pid_t kvm_pid;
uint64_t *val;
uint32_t num_of_nodes = 0;
size_t shm_size;
size_t shm_old_size;
int shm_name_len;
int ret = -1;
int fd;
if (argc != 2 || !(kvm_pid = atoi(argv[1]))) {
printf("usage: reds_stat [qemu_pid] (e.g. `pgrep qemu`)\n");
return -1;
}
shm_name_len = strlen(SPICE_STAT_SHM_NAME) + strlen(argv[1]);
if (!(shm_name = (char *)malloc(shm_name_len))) {
perror("malloc");
return -1;
}
snprintf(shm_name, shm_name_len, SPICE_STAT_SHM_NAME, kvm_pid);
if ((fd = shm_open(shm_name, O_RDONLY, 0444)) == -1) {
perror("shm_open");
free(shm_name);
return -1;
}
shm_size = sizeof(SpiceStat);
reds_stat = (SpiceStat *)mmap(NULL, shm_size, PROT_READ, MAP_SHARED, fd, 0);
if (reds_stat == (SpiceStat *)MAP_FAILED) {
perror("mmap");
goto error1;
}
if (reds_stat->magic != SPICE_STAT_MAGIC) {
printf("bad magic %u\n", reds_stat->magic);
goto error2;
}
if (reds_stat->version != SPICE_STAT_VERSION) {
printf("bad version %u\n", reds_stat->version);
goto error2;
}
while (1) {
system("clear");
printf("spice statistics\n\n");
if (num_of_nodes != reds_stat->num_of_nodes) {
num_of_nodes = reds_stat->num_of_nodes;
shm_old_size = shm_size;
shm_size = sizeof(SpiceStat) + num_of_nodes * sizeof(SpiceStatNode);
reds_stat = mremap(reds_stat, shm_old_size, shm_size, MREMAP_MAYMOVE);
if (reds_stat == (SpiceStat *)MAP_FAILED) {
perror("mremap");
goto error3;
}
values = (uint64_t *)realloc(values, num_of_nodes * sizeof(uint64_t));
if (values == NULL) {
perror("realloc");
goto error3;
}
memset(values, 0, num_of_nodes * sizeof(uint64_t));
}
print_stat_tree(reds_stat->root_index, 0);
sleep(1);
}
ret = 0;
error3:
free(values);
error2:
munmap(reds_stat, shm_size);
error1:
shm_unlink(shm_name);
free(shm_name);
return ret;
}
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