Date: Wed, 01 Sep 2021 21:17:06 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 258204] Extremely poor performance copying directory with lot small files on nvme Message-ID: <bug-258204-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=258204 Bug ID: 258204 Summary: Extremely poor performance copying directory with lot small files on nvme Product: Base System Version: 13.0-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: ali.abdallah@suse.com Copying over a folder with lot of small files takes a lot of time time cp -r /usr/src/sys /home/ali/sys 173.58 real 0.00 user 0.90 sys /dev/gpt/freebsd-root / ufs rw,noatime 2 2 /dev/gpt/freebsd-boot /bootfs ufs rw 1 1 /dev/gpt/freebsd-swap none swap sw 0 0 /usr/src/sys contains ~500M of data. The problematic system is a T495 with nvme device. On the same machine, I tested copying the same amount of data on OpenSUSE 15.3 with xfs root partition, and it takes around 1.5 seconds. While copying, I see that the 'cp' command spends a lot of time on biord/biowr. I did a test copying a single large file of 500M, and it impressively fast. Please let me know if you need more data. -- You are receiving this mail because: You are the assignee for the bug.help
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