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Illumos #3552, #3564

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3552 condensing one space map burns 3 seconds of CPU in spa_sync() thread
3564 spa_sync() spends 5-10% of its time in metaslab_sync() (when not condensing)
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Richard Lowe <richlowe@richlowe.net>

References:
  illumos/illumos-gate@16a4a80742
  https://www.illumos.org/issues/3552
  https://www.illumos.org/issues/3564

Ported-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #1513
This commit is contained in:
George Wilson
2013-06-14 22:30:35 -05:00
committed by Brian Behlendorf
parent c99c90015e
commit e51be06697
6 changed files with 327 additions and 112 deletions
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cmd/zdb/zdb.c
+6 -6
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@@ -548,7 +548,7 @@ static void
dump_metaslab_stats(metaslab_t *msp)
{
char maxbuf[32];
space_map_t *sm = &msp->ms_map;
space_map_t *sm = msp->ms_map;
avl_tree_t *t = sm->sm_pp_root;
int free_pct = sm->sm_space * 100 / sm->sm_size;
@@ -564,7 +564,7 @@ dump_metaslab(metaslab_t *msp)
{
vdev_t *vd = msp->ms_group->mg_vd;
spa_t *spa = vd->vdev_spa;
space_map_t *sm = &msp->ms_map;
space_map_t *sm = msp->ms_map;
space_map_obj_t *smo = &msp->ms_smo;
char freebuf[32];
@@ -2194,11 +2194,11 @@ zdb_leak_init(spa_t *spa, zdb_cb_t *zcb)
for (m = 0; m < vd->vdev_ms_count; m++) {
metaslab_t *msp = vd->vdev_ms[m];
mutex_enter(&msp->ms_lock);
space_map_unload(&msp->ms_map);
VERIFY(space_map_load(&msp->ms_map,
space_map_unload(msp->ms_map);
VERIFY(space_map_load(msp->ms_map,
&zdb_space_map_ops, SM_ALLOC, &msp->ms_smo,
spa->spa_meta_objset) == 0);
msp->ms_map.sm_ppd = vd;
msp->ms_map->sm_ppd = vd;
mutex_exit(&msp->ms_lock);
}
}
@@ -2223,7 +2223,7 @@ zdb_leak_fini(spa_t *spa)
for (m = 0; m < vd->vdev_ms_count; m++) {
metaslab_t *msp = vd->vdev_ms[m];
mutex_enter(&msp->ms_lock);
space_map_unload(&msp->ms_map);
space_map_unload(msp->ms_map);
mutex_exit(&msp->ms_lock);
}
}