Date: Sun, 01 Mar 2020 15:45:59 +0000 From: bugzilla-noreply@freebsd.org To: usb@FreeBSD.org Subject: [Bug 244356] Writing to a USB 3.0 stick is very slow Message-ID: <bug-244356-19105-8skazqozGW@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-244356-19105@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244356 --- Comment #16 from vidwer+fbsdbugs@gmail.com --- I'll be following this. With the USB DA device from https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235897 dd and rsync transfers to UFS and to ZFS seem to stall, after a while. A 120-something transfer speed of a large generated file (dd if=/dev/urandom of=foo bs=1M count=1048576) stalls, drops to 10-something transfer speed, stalls again and drops to KB/s speeds. After interrupting rsync, I ran 'time sync', which takes 'real 2m15.632s'. Because of the dd observation, perhaps 'disk cache' can't keep up with the amount of writes? rsync to UFS on USB 2.0 storage: sent 1,074,155,802 bytes received 76 bytes 9,633,685.00 bytes/sec rsync to UFS on USB 3.0 storage: sent 1,074,155,802 bytes received 76 bytes 2,438,492.35 bytes/sec I can test patches on 13-CURRENT. -- You are receiving this mail because: You are the assignee for the bug.home | help
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