Date: Sat, 17 Jan 2015 11:26:14 +0200 From: Mihai-Alexandru Vintila <unixro@gmail.com> To: "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org> Subject: Re: Poor performance on Intel P3600 NVME driver Message-ID: <A6A24F93-9BF9-466D-9B1D-CEEE003D6CFE@gmail.com> In-Reply-To: <54B99DA1.2000001@multiplay.co.uk> References: <54B7F769.40605@gmail.com> <20150115175927.GA19071@zxy.spb.ru> <54B8C7E9.3030602@gmail.com> <CAKAYmM%2BEpvOYfFnF1i02aoTC2vfVT%2Bq=6XvCPBnYg-mRQAVD1A@mail.gmail.com> <CAORpBLUYzHw%2BRRccRpkcxYrnjnckRMLyAc86J9UPpirRSeWxqQ@mail.gmail.com> <20150116221344.GA72201@pit.databus.com> <54B999C6.2090909@gmail.com> <54B99DA1.2000001@multiplay.co.uk>
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Trim is already disabled as you can see in previous mail Best regards, Mihai Vintila > On 17 ian. 2015, at 01:24, Steven Hartland <killing@multiplay.co.uk> wrote= : >=20 > Any difference if you disable trim? >=20 >> On 16/01/2015 23:07, Mihai Vintila wrote: >> I've remade the test with atime=3Doff. Drive has 512b physical, but I've c= reated it with 4k gnop anyway. Results are similar with atime >> Processor cache line size set to 32 bytes. >> File stride size set to 17 * record size. >> random random bk wd record stride >> KB reclen write rewrite read reread read write re a= d rewrite read fwrite frewrite fread freread >> 1048576 4 74427 0 101744 0 93529 47925 >> 1048576 8 39072 0 64693 0 61104 25452 >>=20 >> I've also tried to increase vfs.zfs.vdev.aggregation_limit and ended up w= ith a crash (screenshot attached) >>=20 >> I'm attaching zfs tunables: >> sysctl -a|grep vfs.zfs >> vfs.zfs.arc_max: 34359738368 >> vfs.zfs.arc_min: 4294967296 >> vfs.zfs.arc_average_blocksize: 8192 >> vfs.zfs.arc_meta_used: 5732232 >> vfs.zfs.arc_meta_limit: 8589934592 >> vfs.zfs.l2arc_write_max: 8388608 >> vfs.zfs.l2arc_write_boost: 8388608 >> vfs.zfs.l2arc_headroom: 2 >> vfs.zfs.l2arc_feed_secs: 1 >> vfs.zfs.l2arc_feed_min_ms: 200 >> vfs.zfs.l2arc_noprefetch: 1 >> vfs.zfs.l2arc_feed_again: 1 >> vfs.zfs.l2arc_norw: 1 >> vfs.zfs.anon_size: 32768 >> vfs.zfs.anon_metadata_lsize: 0 >> vfs.zfs.anon_data_lsize: 0 >> vfs.zfs.mru_size: 17841664 >> vfs.zfs.mru_metadata_lsize: 858624 >> vfs.zfs.mru_data_lsize: 13968384 >> vfs.zfs.mru_ghost_size: 0 >> vfs.zfs.mru_ghost_metadata_lsize: 0 >> vfs.zfs.mru_ghost_data_lsize: 0 >> vfs.zfs.mfu_size: 4574208 >> vfs.zfs.mfu_metadata_lsize: 465408 >> vfs.zfs.mfu_data_lsize: 4051456 >> vfs.zfs.mfu_ghost_size: 0 >> vfs.zfs.mfu_ghost_metadata_lsize: 0 >> vfs.zfs.mfu_ghost_data_lsize: 0 >> vfs.zfs.l2c_only_size: 0 >> vfs.zfs.dedup.prefetch: 1 >> vfs.zfs.nopwrite_enabled: 1 >> vfs.zfs.mdcomp_disable: 0 >> vfs.zfs.dirty_data_max: 4294967296 >> vfs.zfs.dirty_data_max_max: 4294967296 >> vfs.zfs.dirty_data_max_percent: 10 >> vfs.zfs.dirty_data_sync: 67108864 >> vfs.zfs.delay_min_dirty_percent: 60 >> vfs.zfs.delay_scale: 500000 >> vfs.zfs.prefetch_disable: 1 >> vfs.zfs.zfetch.max_streams: 8 >> vfs.zfs.zfetch.min_sec_reap: 2 >> vfs.zfs.zfetch.block_cap: 256 >> vfs.zfs.zfetch.array_rd_sz: 1048576 >> vfs.zfs.top_maxinflight: 32 >> vfs.zfs.resilver_delay: 2 >> vfs.zfs.scrub_delay: 4 >> vfs.zfs.scan_idle: 50 >> vfs.zfs.scan_min_time_ms: 1000 >> vfs.zfs.free_min_time_ms: 1000 >> vfs.zfs.resilver_min_time_ms: 3000 >> vfs.zfs.no_scrub_io: 0 >> vfs.zfs.no_scrub_prefetch: 0 >> vfs.zfs.metaslab.gang_bang: 131073 >> vfs.zfs.metaslab.fragmentation_threshold: 70 >> vfs.zfs.metaslab.debug_load: 0 >> vfs.zfs.metaslab.debug_unload: 0 >> vfs.zfs.metaslab.df_alloc_threshold: 131072 >> vfs.zfs.metaslab.df_free_pct: 4 >> vfs.zfs.metaslab.min_alloc_size: 10485760 >> vfs.zfs.metaslab.load_pct: 50 >> vfs.zfs.metaslab.unload_delay: 8 >> vfs.zfs.metaslab.preload_limit: 3 >> vfs.zfs.metaslab.preload_enabled: 1 >> vfs.zfs.metaslab.fragmentation_factor_enabled: 1 >> vfs.zfs.metaslab.lba_weighting_enabled: 1 >> vfs.zfs.metaslab.bias_enabled: 1 >> vfs.zfs.condense_pct: 200 >> vfs.zfs.mg_noalloc_threshold: 0 >> vfs.zfs.mg_fragmentation_threshold: 85 >> vfs.zfs.check_hostid: 1 >> vfs.zfs.spa_load_verify_maxinflight: 10000 >> vfs.zfs.spa_load_verify_metadata: 1 >> vfs.zfs.spa_load_verify_data: 1 >> vfs.zfs.recover: 0 >> vfs.zfs.deadman_synctime_ms: 1000000 >> vfs.zfs.deadman_checktime_ms: 5000 >> vfs.zfs.deadman_enabled: 1 >> vfs.zfs.spa_asize_inflation: 24 >> vfs.zfs.txg.timeout: 5 >> vfs.zfs.vdev.cache.max: 16384 >> vfs.zfs.vdev.cache.size: 0 >> vfs.zfs.vdev.cache.bshift: 16 >> vfs.zfs.vdev.trim_on_init: 0 >> vfs.zfs.vdev.mirror.rotating_inc: 0 >> vfs.zfs.vdev.mirror.rotating_seek_inc: 5 >> vfs.zfs.vdev.mirror.rotating_seek_offset: 1048576 >> vfs.zfs.vdev.mirror.non_rotating_inc: 0 >> vfs.zfs.vdev.mirror.non_rotating_seek_inc: 1 >> vfs.zfs.vdev.max_active: 1000 >> vfs.zfs.vdev.sync_read_min_active: 32 >> vfs.zfs.vdev.sync_read_max_active: 32 >> vfs.zfs.vdev.sync_write_min_active: 32 >> vfs.zfs.vdev.sync_write_max_active: 32 >> vfs.zfs.vdev.async_read_min_active: 32 >> vfs.zfs.vdev.async_read_max_active: 32 >> vfs.zfs.vdev.async_write_min_active: 32 >> vfs.zfs.vdev.async_write_max_active: 32 >> vfs.zfs.vdev.scrub_min_active: 1 >> vfs.zfs.vdev.scrub_max_active: 2 >> vfs.zfs.vdev.trim_min_active: 1 >> vfs.zfs.vdev.trim_max_active: 64 >> vfs.zfs.vdev.aggregation_limit: 131072 >> vfs.zfs.vdev.read_gap_limit: 32768 >> vfs.zfs.vdev.write_gap_limit: 4096 >> vfs.zfs.vdev.bio_flush_disable: 0 >> vfs.zfs.vdev.bio_delete_disable: 0 >> vfs.zfs.vdev.trim_max_bytes: 2147483648 >> vfs.zfs.vdev.trim_max_pending: 64 >> vfs.zfs.max_auto_ashift: 13 >> vfs.zfs.min_auto_ashift: 9 >> vfs.zfs.zil_replay_disable: 0 >> vfs.zfs.cache_flush_disable: 0 >> vfs.zfs.zio.use_uma: 1 >> vfs.zfs.zio.exclude_metadata: 0 >> vfs.zfs.sync_pass_deferred_free: 2 >> vfs.zfs.sync_pass_dont_compress: 5 >> vfs.zfs.sync_pass_rewrite: 2 >> vfs.zfs.snapshot_list_prefetch: 0 >> vfs.zfs.super_owner: 0 >> vfs.zfs.debug: 0 >> vfs.zfs.version.ioctl: 4 >> vfs.zfs.version.acl: 1 >> vfs.zfs.version.spa: 5000 >> vfs.zfs.version.zpl: 5 >> vfs.zfs.vol.mode: 1 >> vfs.zfs.trim.enabled: 0 >> vfs.zfs.trim.txg_delay: 32 >> vfs.zfs.trim.timeout: 30 >> vfs.zfs.trim.max_interval: 1 >>=20 >> And nvm: >> ev.nvme.%parent: >> dev.nvme.0.%desc: Generic NVMe Device >> dev.nvme.0.%driver: nvme >> dev.nvme.0.%location: slot=3D0 function=3D0 handle=3D\_SB_.PCI0.BR3A.D08A= >> dev.nvme.0.%pnpinfo: vendor=3D0x8086 device=3D0x0953 subvendor=3D0x8086 s= ubdevice=3D0x370a class=3D0x010802 >> dev.nvme.0.%parent: pci4 >> dev.nvme.0.int_coal_time: 0 >> dev.nvme.0.int_coal_threshold: 0 >> dev.nvme.0.timeout_period: 30 >> dev.nvme.0.num_cmds: 811857 >> dev.nvme.0.num_intr_handler_calls: 485242 >> dev.nvme.0.reset_stats: 0 >> dev.nvme.0.adminq.num_entries: 128 >> dev.nvme.0.adminq.num_trackers: 16 >> dev.nvme.0.adminq.sq_head: 12 >> dev.nvme.0.adminq.sq_tail: 12 >> dev.nvme.0.adminq.cq_head: 8 >> dev.nvme.0.adminq.num_cmds: 12 >> dev.nvme.0.adminq.num_intr_handler_calls: 7 >> dev.nvme.0.adminq.dump_debug: 0 >> dev.nvme.0.ioq0.num_entries: 256 >> dev.nvme.0.ioq0.num_trackers: 128 >> dev.nvme.0.ioq0.sq_head: 69 >> dev.nvme.0.ioq0.sq_tail: 69 >> dev.nvme.0.ioq0.cq_head: 69 >> dev.nvme.0.ioq0.num_cmds: 811845 >> dev.nvme.0.ioq0.num_intr_handler_calls: 485235 >> dev.nvme.0.ioq0.dump_debug: 0 >> dev.nvme.1.%desc: Generic NVMe Device >> dev.nvme.1.%driver: nvme >> dev.nvme.1.%location: slot=3D0 function=3D0 handle=3D\_SB_.PCI0.BR3B.H000= >> dev.nvme.1.%pnpinfo: vendor=3D0x8086 device=3D0x0953 subvendor=3D0x8086 s= ubdevice=3D0x370a class=3D0x010802 >> dev.nvme.1.%parent: pci5 >> dev.nvme.1.int_coal_time: 0 >> dev.nvme.1.int_coal_threshold: 0 >> dev.nvme.1.timeout_period: 30 >> dev.nvme.1.num_cmds: 167 >> dev.nvme.1.num_intr_handler_calls: 163 >> dev.nvme.1.reset_stats: 0 >> dev.nvme.1.adminq.num_entries: 128 >> dev.nvme.1.adminq.num_trackers: 16 >> dev.nvme.1.adminq.sq_head: 12 >> dev.nvme.1.adminq.sq_tail: 12 >> dev.nvme.1.adminq.cq_head: 8 >> dev.nvme.1.adminq.num_cmds: 12 >> dev.nvme.1.adminq.num_intr_handler_calls: 8 >> dev.nvme.1.adminq.dump_debug: 0 >> dev.nvme.1.ioq0.num_entries: 256 >> dev.nvme.1.ioq0.num_trackers: 128 >> dev.nvme.1.ioq0.sq_head: 155 >> dev.nvme.1.ioq0.sq_tail: 155 >> dev.nvme.1.ioq0.cq_head: 155 >> dev.nvme.1.ioq0.num_cmds: 155 >> dev.nvme.1.ioq0.num_intr_handler_calls: 155 >> dev.nvme.1.ioq0.dump_debug: 0 >>=20 >> Best regards, >> Vintila Mihai Alexandru >>=20 >>> On 1/17/2015 12:13 AM, Barney Wolff wrote: >>> I suspect Linux defaults to noatime - at least it does on my rpi. I >>> believe the FreeBSD default is the other way. That may explain some >>> of the difference. >>>=20 >>> Also, did you use gnop to force the zpool to start on a 4k boundary? >>> If not, and the zpool happens to be offset, that's another big hit. >>> Same for ufs, especially if the disk has logical sectors of 512 but >>> physical of 4096. One can complain that FreeBSD should prevent, or >>> at least warn about, this sort of foot-shooting. >>>=20 >>>> On Fri, Jan 16, 2015 at 10:21:07PM +0200, Mihai-Alexandru Vintila wrote= : >>>> @Barney Wolff it's a new pool with only changes recordsize=3D4k and >>>> compression=3Dlz4 . On linux test is on ext4 with default values. Penal= ty is >>>> pretty high. Also there is a read penalty for read as well between ufs a= nd >>>> zfs. Even on nvmecontrol perftest you can see the read penalty it's not= >>>> normal to have same result for both write and read >>=20 >> _______________________________________________ >> freebsd-stable@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-stable >> To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"= >=20 > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"
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