Oh yes, and perf top output after dropping caches: Samples: 11M of event 'cycles:ppp', Event count (approx.): 648517108833 Overhead Shared Object Symbol 19.77% [kernel] [k] zfs_prune 18.96% [kernel] [k] _raw_spin_lock 12.89% [kernel] [k] d_prune_aliases 7.12% [kernel] [k] igrab 7.10% [kernel] [k] _atomic_dec_and_lock 6.98% [kernel] [k] iput 2.24% [kernel] [k] Skein_512_Process_Block 1.65% [kernel] [k] arc_evict_state 0.89% [kernel] [k] lz4_decompress_zfs 0.78% [kernel] [k] mutex_unlock 0.78% [kernel] [k] mutex_lock 0.69% [kernel] [k] native_queued_spin_lock_slowpath 0.52% [kernel] [k] clear_page_erms 0.46% [kernel] [k] _raw_spin_lock_irqsave 0.44% [kernel] [k] Skein_Get64_LSB_First 0.35% [kernel] [k] __schedule 0.27% [kernel] [k] mutex_trylock 0.26% [kernel] [k] kmem_cache_free 0.26% [kernel] [k] _cond_resched 0.23% [kernel] [k] arc_space_consume 0.21% [kernel] [k] kmem_cache_alloc 0.20% [kernel] [k] menu_select 0.20% [kernel] [k] multilist_sublist_move_forward 0.19% [kernel] [k] arc_space_return 0.18% [kernel] [k] taskq_thread 0.18% [kernel] [k] __cv_signal
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1814983 Title: zfs poor sustained read performance from ssd pool To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1814983/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
