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Merge 309be3a05c into b109925820

This commit is contained in:
Michael Bishop 2024-09-09 00:38:35 -03:00 committed by GitHub
parent b109925820 309be3a05c
commit 3fda4e4e50
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GPG Key ID: B5690EEEBB952194
2 changed files with 107 additions and 4 deletions
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1
include/sys/spa.h
View File

@ -911,6 +911,7 @@ typedef struct spa_stats {
spa_history_kstat_t state; /* pool state */
spa_history_kstat_t guid; /* pool guid */
spa_history_kstat_t iostats;
spa_history_kstat_t fragmentation[5];
} spa_stats_t;
typedef enum txg_state {

110
module/zfs/spa_stats.c
View File

@ -24,6 +24,7 @@
#include <sys/vdev_impl.h>
#include <sys/spa.h>
#include <zfs_comutil.h>
#include <sys/metaslab_impl.h>
/*
* Keeps stats on last N reads per spa_t, disabled by default.
@ -302,6 +303,105 @@ spa_txg_history_init(spa_t *spa)
offsetof(spa_txg_history_t, sth_node));
}
typedef struct {
spa_t *spa;
int metaclass;
} freespace_histogram_stat_t;
static void *
spa_frag_addr(kstat_t *ksp, loff_t n)
{
if (n == 0) {
freespace_histogram_stat_t *stat = ksp->ks_private;
switch (stat->metaclass) {
case 0:
return (spa_normal_class(stat->spa));
case 1:
return (spa_log_class(stat->spa));
case 2:
return (spa_embedded_log_class(stat->spa));
case 3:
return (spa_special_class(stat->spa));
case 4:
return (spa_dedup_class(stat->spa));
}
}
return (NULL);
}
static int
spa_frag_data(char *buf, size_t size, void *data)
{
metaslab_class_t *mc = data;
size_t offset = 0;
int res;
// without this, it becomes a data-leak, and un-initialized strings
// can be returned if all buckets are 0
buf[0] = 0;
for (int i = 0; i < RANGE_TREE_HISTOGRAM_SIZE; i++) {
if (mc->mc_histogram[i] > 0) {
res = snprintf(buf + offset, size, "%d %llu\n", i,
(u_longlong_t)mc->mc_histogram[i]);
offset += res;
size -= res;
}
}
return (0);
}
static void
spa_fragmentation_init(spa_t *spa)
{
char *dirname;
const char *statnames[] = {
"fragmentation_normal",
"fragmentation_log",
"fragmentation_embedded_log",
"fragmentation_special",
"fragmentation_dedup"
};
for (int i = 0; i < 5; i++) {
spa_history_kstat_t *shk = &spa->spa_stats.fragmentation[i];
kstat_t *ksp;
dirname = kmem_asprintf("zfs/%s", spa_name(spa));
ksp = kstat_create(dirname, 0, statnames[i], "misc",
KSTAT_TYPE_RAW, 0, KSTAT_FLAG_VIRTUAL);
kmem_strfree(dirname);
shk->kstat = ksp;
if (ksp) {
freespace_histogram_stat_t *stat = kmem_zalloc(
sizeof (freespace_histogram_stat_t), KM_SLEEP);
stat->spa = spa;
stat->metaclass = i;
ksp->ks_private = stat;
ksp->ks_flags |= KSTAT_FLAG_NO_HEADERS;
kstat_set_raw_ops(ksp, NULL, spa_frag_data,
spa_frag_addr);
kstat_install(ksp);
}
}
}
static void
spa_fragmentation_destroy(spa_t *spa)
{
for (int i = 0; i < 5; i++) {
spa_history_kstat_t *shk = &spa->spa_stats.fragmentation[i];
kstat_t *ksp = shk->kstat;
if (ksp) {
if (ksp->ks_private) {
kmem_free(ksp->ks_private,
sizeof (freespace_histogram_stat_t));
}
kstat_delete(ksp);
}
}
}
static void
spa_txg_history_destroy(spa_t *spa)
{
@ -855,7 +955,7 @@ spa_guid_init(spa_t *spa)
}
static void
spa_health_destroy(spa_t *spa)
spa_state_destroy(spa_t *spa)
{
spa_history_kstat_t *shk = &spa->spa_stats.state;
kstat_t *ksp = shk->kstat;
@ -998,18 +1098,20 @@ spa_stats_init(spa_t *spa)
spa_state_init(spa);
spa_guid_init(spa);
spa_iostats_init(spa);
spa_fragmentation_init(spa);
}
void
spa_stats_destroy(spa_t *spa)
{
spa_fragmentation_destroy(spa);
spa_iostats_destroy(spa);
spa_health_destroy(spa);
spa_guid_destroy(spa);
spa_state_destroy(spa);
spa_mmp_history_destroy(spa);
spa_tx_assign_destroy(spa);
spa_txg_history_destroy(spa);
spa_read_history_destroy(spa);
spa_mmp_history_destroy(spa);
spa_guid_destroy(spa);
}
ZFS_MODULE_PARAM(zfs, zfs_, read_history, UINT, ZMOD_RW,