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author | smh <smh@FreeBSD.org> | 2014-09-11 18:42:51 +0000 |
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committer | smh <smh@FreeBSD.org> | 2014-09-11 18:42:51 +0000 |
commit | a8fade0c7855a7e15410cad9d6c0254c4778fc41 (patch) | |
tree | e1e4c0e3f4160ffdc04ba1efef8fefb3017a2e4b /sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_pool.c | |
parent | a5cc4ff42567fb4efaa3666b43865d168e26d28e (diff) | |
download | FreeBSD-src-a8fade0c7855a7e15410cad9d6c0254c4778fc41.zip FreeBSD-src-a8fade0c7855a7e15410cad9d6c0254c4778fc41.tar.gz |
MFC r266497:
Add sysctls for ZFS dirty data tuning.
MFC r266533:
Improve sysctl descriptions for new ZFS sysctls.
Approved by: re (marius)
Sponsored by: Multiplay
Diffstat (limited to 'sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_pool.c')
-rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_pool.c | 105 |
1 files changed, 80 insertions, 25 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_pool.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_pool.c index 8dbdc96..1ce9e48 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_pool.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_pool.c @@ -46,6 +46,11 @@ #include <sys/zil_impl.h> #include <sys/dsl_userhold.h> +#ifdef __FreeBSD__ +#include <sys/sysctl.h> +#include <sys/types.h> +#endif + /* * ZFS Write Throttle * ------------------ @@ -130,33 +135,83 @@ uint64_t zfs_delay_scale = 1000 * 1000 * 1000 / 2000; * per-pool basis using zfs.conf. */ +#ifdef __FreeBSD__ + +extern int zfs_vdev_async_write_active_max_dirty_percent; SYSCTL_DECL(_vfs_zfs); -#if 0 -TUNABLE_INT("vfs.zfs.no_write_throttle", &zfs_no_write_throttle); -SYSCTL_INT(_vfs_zfs, OID_AUTO, no_write_throttle, CTLFLAG_RDTUN, - &zfs_no_write_throttle, 0, ""); -TUNABLE_INT("vfs.zfs.write_limit_shift", &zfs_write_limit_shift); -SYSCTL_INT(_vfs_zfs, OID_AUTO, write_limit_shift, CTLFLAG_RDTUN, - &zfs_write_limit_shift, 0, "2^N of physical memory"); -SYSCTL_DECL(_vfs_zfs_txg); -TUNABLE_INT("vfs.zfs.txg.synctime_ms", &zfs_txg_synctime_ms); -SYSCTL_INT(_vfs_zfs_txg, OID_AUTO, synctime_ms, CTLFLAG_RDTUN, - &zfs_txg_synctime_ms, 0, "Target milliseconds to sync a txg"); - -TUNABLE_QUAD("vfs.zfs.write_limit_min", &zfs_write_limit_min); -SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, write_limit_min, CTLFLAG_RDTUN, - &zfs_write_limit_min, 0, "Minimum write limit"); -TUNABLE_QUAD("vfs.zfs.write_limit_max", &zfs_write_limit_max); -SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, write_limit_max, CTLFLAG_RDTUN, - &zfs_write_limit_max, 0, "Maximum data payload per txg"); -TUNABLE_QUAD("vfs.zfs.write_limit_inflated", &zfs_write_limit_inflated); -SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, write_limit_inflated, CTLFLAG_RDTUN, - &zfs_write_limit_inflated, 0, "Maximum size of the dynamic write limit"); -TUNABLE_QUAD("vfs.zfs.write_limit_override", &zfs_write_limit_override); -SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, write_limit_override, CTLFLAG_RDTUN, - &zfs_write_limit_override, 0, - "Force a txg if dirty buffers exceed this value (bytes)"); + +TUNABLE_QUAD("vfs.zfs.dirty_data_max", &zfs_dirty_data_max); +SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, dirty_data_max, CTLFLAG_RWTUN, + &zfs_dirty_data_max, 0, + "The maximum amount of dirty data in bytes after which new writes are " + "halted until space becomes available"); + +TUNABLE_QUAD("vfs.zfs.dirty_data_max_max", &zfs_dirty_data_max_max); +SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, dirty_data_max_max, CTLFLAG_RDTUN, + &zfs_dirty_data_max_max, 0, + "The absolute cap on dirty_data_max when auto calculating"); + +TUNABLE_INT("vfs.zfs.dirty_data_max_percent", &zfs_dirty_data_max_percent); +SYSCTL_INT(_vfs_zfs, OID_AUTO, dirty_data_max_percent, CTLFLAG_RDTUN, + &zfs_dirty_data_max_percent, 0, + "The percent of physical memory used to auto calculate dirty_data_max"); + +TUNABLE_QUAD("vfs.zfs.dirty_data_sync", &zfs_dirty_data_sync); +SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, dirty_data_sync, CTLFLAG_RWTUN, + &zfs_dirty_data_sync, 0, + "Force a txg if the number of dirty buffer bytes exceed this value"); + +static int sysctl_zfs_delay_min_dirty_percent(SYSCTL_HANDLER_ARGS); +/* No zfs_delay_min_dirty_percent tunable due to limit requirements */ +SYSCTL_PROC(_vfs_zfs, OID_AUTO, delay_min_dirty_percent, + CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RW, 0, sizeof(int), + sysctl_zfs_delay_min_dirty_percent, "I", + "The limit of outstanding dirty data before transations are delayed"); + +static int sysctl_zfs_delay_scale(SYSCTL_HANDLER_ARGS); +/* No zfs_delay_scale tunable due to limit requirements */ +SYSCTL_PROC(_vfs_zfs, OID_AUTO, delay_scale, + CTLTYPE_U64 | CTLFLAG_MPSAFE | CTLFLAG_RW, 0, sizeof(uint64_t), + sysctl_zfs_delay_scale, "QU", + "Controls how quickly the delay approaches infinity"); + +static int +sysctl_zfs_delay_min_dirty_percent(SYSCTL_HANDLER_ARGS) +{ + int val, err; + + val = zfs_delay_min_dirty_percent; + err = sysctl_handle_int(oidp, &val, 0, req); + if (err != 0 || req->newptr == NULL) + return (err); + + if (val < zfs_vdev_async_write_active_max_dirty_percent) + return (EINVAL); + + zfs_delay_min_dirty_percent = val; + + return (0); +} + +static int +sysctl_zfs_delay_scale(SYSCTL_HANDLER_ARGS) +{ + uint64_t val; + int err; + + val = zfs_delay_scale; + err = sysctl_handle_64(oidp, &val, 0, req); + if (err != 0 || req->newptr == NULL) + return (err); + + if (val > UINT64_MAX / zfs_dirty_data_max) + return (EINVAL); + + zfs_delay_scale = val; + + return (0); +} #endif hrtime_t zfs_throttle_delay = MSEC2NSEC(10); |