Date: Tue, 19 May 2020 14:18:33 +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-244356-19105-5B2gWCZmu4@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 #72 from Maurizio <maurizio1018@gmail.com> --- (In reply to Olivier Certner from comment #52) The stick, a Kingston DataTraveler G4 32GB, works well if formatted as FAT3= 2, bad if formatted as UFS and the performance will degrade over the time. I h= ave written this script for testing the stick: #!/bin/sh set -x STICK_DEVICE=3D/dev/da0 FILE_ON_STICK=3D/media/5ec390d1148aa331/zero.bin COUNT=3D1024 tmux new-window "script /tmp/dd.log dd if=3D/dev/zero of=3D$FILE_ON_STICK b= s=3D1M count=3D$COUNT; sleep 5; killall iostat" tmux new-window "script /tmp/iostast.log iostat -w 1 $STICK_DEVICE" set +x where FILE_ON_STICK depends on the stick mount point. I have run the script one time with good performance with the stick formatt= ed as FAT32, the log output are: dd_fat32.log (https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D214626 ) and iostat_fat32.log (https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D214= 630). The dd instruction takes 49 sec.=20 After formatting the stick as UFS I have runned the script 3 times, the dd instruction takes 57, 141 and 189 seconds. The logs are, in order: dd_ufs.log (https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D214627 ), iostat_ufs.log (https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D2146= 31), dd_usf2.log (https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D214628), iostat_ufs2.log (https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D2146= 33) dd_ufs3.log and=20 iostat_ufs3.log (https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D2146= 34) Running the script with the stick formatted as UFS, the laptop used for the test, hangs a little. --=20 You are receiving this mail because: You are the assignee for the bug.=
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