Date: Sat, 2 Jan 2021 17:12:02 +0100 From: Matthias Apitz <guru@unixarea.de> To: Alan Somers <asomers@freebsd.org> Cc: FreeBSD CURRENT <freebsd-current@freebsd.org> Subject: Re: cp(1) of large files is causing 100% CPU utilization and poor transfer Message-ID: <X/CbUu4tVQG81ItJ@c720-r368166.fritz.box> In-Reply-To: <CAOtMX2hFupzf-MD84eo_-n9OzfYX6b6tWRsHPECZGKaq5QCUVw@mail.gmail.com> References: <X/CKQFbpbWDdLXvw@c720-r368166.fritz.box> <CAOtMX2gd6vaBF=6Z6stefGRN8A7S4Gtf4drO-YgAbd=KXPwKNg@mail.gmail.com> <X/CY/kuKUJHUVEbB@c720-r368166.fritz.box> <CAOtMX2hFupzf-MD84eo_-n9OzfYX6b6tWRsHPECZGKaq5QCUVw@mail.gmail.com>
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El día sábado, enero 02, 2021 a las 09:06:24a. m. -0700, Alan Somers escribió: > > As I said, it can be reproduced using only the local file system. This > > was setup recently on a SSD: > > > > # dmesg | grep ada0 > > ada0 at ahcich0 bus 0 scbus0 target 0 lun 0 > > ada0: <TS512GMTS430S R0906A> ACS-2 ATA SATA 3.x device > > ada0: Serial Number F995890846 > > ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 1024bytes) > > ada0: Command Queueing enabled > > ada0: 488386MB (1000215216 512 byte sectors) > > > > and by this procedure: > > > > # gpart create -s gpt ada0 > > # gpart add -t freebsd-boot -s 512k -a4k -l ssdboot ada0 > > # gpart bootcode -b /boot/pmbr -p /boot/gptboot -i1 ada0 > > # gpart add -t freebsd-ufs -l ssdrootfs -b 1m -s 2g ada0 > > # gpart add -t freebsd-ufs -l ssdvarfs -a 1m -s 2g ada0 > > # gpart add -t freebsd-ufs -l ssdusrfs -a 1m ada0 > > # newfs -U -t /dev/gpt/ssdrootfs > > # newfs -U -t /dev/gpt/ssdvarfs > > # newfs -U -t /dev/gpt/ssdusrfs > > > > # gpart show -l ada0 > > => 40 1000215136 ada0 GPT (477G) > > 40 1024 1 ssdboot (512K) > > 1064 984 - free - (492K) > > 2048 4194304 2 ssdrootfs (2.0G) > > 4196352 4194304 3 ssdvarfs (2.0G) > > 8390656 16777216 4 ssdswap (8.0G) > > 25167872 975046656 5 ssdusrfs (465G) > > 1000214528 648 - free - (324K) > > > > # mount -t ufs > > /dev/gpt/ssdrootfs on / (ufs, local, soft-updates) > > /dev/gpt/ssdvarfs on /var (ufs, local, soft-updates) > > /dev/gpt/ssdusrfs on /usr (ufs, local, soft-updates) > > > > When I run in the /usr fs the command > > > > # cp -p guru-20210102.tar.gz xxx > > > > it copies around 168M per minute. > > > Is that copying from /usr to /usr, or from /usr to /var or /? # cd /home/backups # cp -p guru-20210102.tar.gz xxx i.e. from /usr to /usr. matthias -- Matthias Apitz, ✉ guru@unixarea.de, http://www.unixarea.de/ +49-176-38902045 Public GnuPG key: http://www.unixarea.de/key.pub ¡Con Cuba no te metas! «» Don't mess with Cuba! «» Leg Dich nicht mit Kuba an! http://www.cubadebate.cu/noticias/2020/12/25/en-video-con-cuba-no-te-metas/
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