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/> References: <bug-244356-19105@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D244356 --- 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=3D235897 dd and rsync tra= nsfers to UFS and to ZFS seem to stall, after a while. A 120-something transfer speed of a large generated file (dd if=3D/dev/uran= dom of=3Dfoo bs=3D1M count=3D1048576) stalls, drops to 10-something transfer sp= eed, 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. --=20 You are receiving this mail because: You are the assignee for the bug.=
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