Re: Low HDD tranfer rate with FreeBSD 5.3-Release
Amandeep wrote: Hi all, I am using Tyan S2098 MB with 160GB Maxtor ATA Drive and the transfer rate is very low. FreeBSD 5.3-Release. Any ideas what is going on here. The transfer rate is about 15MB/s when I run #dd if=/dev/zero of=/usr/junk bs=8192 then do #iostat 1 ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]" Check the performance archive for a long thread on disk tweaking. sysctl vfs.read_max=32 should give you a good boost, but read that thread being attempting this. There was another tweak in there I found interesting, but can be dangerous. I'll let you look that one up. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Low HDD tranfer rate with FreeBSD 5.3-Release
At 03:50 PM 5/9/2005, you wrote: > So how does the block size makes the difference?? What is the true transfer rate.? FWIW, there's a nice little disk IO benchmark "Bonnie" available in the ports & packages. Tests several variations of sequential and random IO. I don't know how accurate its numbers in absolute terms, but it's at least good for relative comparisons of devices on similar systems. Be sure to use the -s option to increase the test file size to something larger than your ram. Sample Output: /datatel > bonnie -s 1000 File './Bonnie.709', size: 1048576000 Writing with putc()...done Rewriting...done Writing intelligently...done Reading with getc()...done Reading intelligently...done Seeker 1...Seeker 3...Seeker 2...start 'em...done...done...done... ---Sequential Output ---Sequential Input-- --Random-- -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- MachineMB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU 1000 10835 98.5 26996 18.1 19876 15.2 8925 83.6 62490 23.0 325.9 3.3 -Wayne ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Low HDD tranfer rate with FreeBSD 5.3-Release
In the last episode (May 09), Amandeep said: > Amandeep wrote: > >>The transfer rate is about 15MB/s > >> > >>when I run > >>#dd if=/dev/zero of=/usr/junk bs=8192 > > > >OK with the above dd > > > >dd if=/dev/ad0 of=/dev/null bs=64k > > > >it gives me 56MB/s. from the start. > > So how does the block size makes the difference?? What is the true > transfer rate.? At the moment, 56MB/sec :) Those two speeds aren't directly comparable, since your first was testing writes through the filesystem with a small blocksize, and the second was testing reads to the raw device with a large blocksize. Usually reading, using raw devices, and using large blocksizes are faster then writing, using a filesystem, and using small blocksizes, so all three changes probably contributed a little to the speed difference. -- Dan Nelson [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Low HDD tranfer rate with FreeBSD 5.3-Release
Amandeep wrote: Dan Nelson wrote: In the last episode (May 09), Eric Anderson said: Eric Anderson wrote: Amandeep wrote: I am using Tyan S2098 MB with 160GB Maxtor ATA Drive and the transfer rate is very low. FreeBSD 5.3-Release. Any ideas what is going on here. The transfer rate is about 15MB/s when I run #dd if=/dev/zero of=/usr/junk bs=8192 Shouldnt it be around 54MB/s for a regular IDE drive. What about other block sizes? Also - you should paste your actual dd output here too. What's the model number of that drive? Maxtor claims (on one of their 160G drives) 17.8MB/s from inner diameter disk and 35.6MB/s for outer diameter for the 5400rpm drives. Yes, try 64k instead of 8k, and also compare read speeds. If you have the time (could take an hour or so), try "dd if=/dev/ad0 of=/dev/null bs=64k", run an "iostat 60" in another window, let the dd run through the entire disk, and compare the relative speeds from start to finish. For the DiamondMax 160, the sustained throughput should be 26MB -> 50MB as you go from inner to outer tracks. OK with the above dd dd if=/dev/ad0 of=/dev/null bs=64k it gives me 56MB/s. from the start. Aman So how does the block size makes the difference?? What is the true transfer rate.? Aman ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]" ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Low HDD tranfer rate with FreeBSD 5.3-Release
Dan Nelson wrote: In the last episode (May 09), Eric Anderson said: Eric Anderson wrote: Amandeep wrote: I am using Tyan S2098 MB with 160GB Maxtor ATA Drive and the transfer rate is very low. FreeBSD 5.3-Release. Any ideas what is going on here. The transfer rate is about 15MB/s when I run #dd if=/dev/zero of=/usr/junk bs=8192 Shouldnt it be around 54MB/s for a regular IDE drive. What about other block sizes? Also - you should paste your actual dd output here too. What's the model number of that drive? Maxtor claims (on one of their 160G drives) 17.8MB/s from inner diameter disk and 35.6MB/s for outer diameter for the 5400rpm drives. Yes, try 64k instead of 8k, and also compare read speeds. If you have the time (could take an hour or so), try "dd if=/dev/ad0 of=/dev/null bs=64k", run an "iostat 60" in another window, let the dd run through the entire disk, and compare the relative speeds from start to finish. For the DiamondMax 160, the sustained throughput should be 26MB -> 50MB as you go from inner to outer tracks. OK with the above dd dd if=/dev/ad0 of=/dev/null bs=64k it gives me 56MB/s. from the start. Aman ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Low HDD tranfer rate with FreeBSD 5.3-Release
In the last episode (May 09), Eric Anderson said: > > Eric Anderson wrote: > >> Amandeep wrote: > >>> I am using Tyan S2098 MB with 160GB Maxtor ATA Drive and the > >>> transfer rate is very low. FreeBSD 5.3-Release. > >>> Any ideas what is going on here. > >>> > >>> The transfer rate is about 15MB/s > >>> > >>> when I run > >>> #dd if=/dev/zero of=/usr/junk bs=8192 > > > >Shouldnt it be around 54MB/s for a regular IDE drive. > > What about other block sizes? Also - you should paste your actual dd > output here too. > > What's the model number of that drive? Maxtor claims (on one of > their 160G drives) 17.8MB/s from inner diameter disk and 35.6MB/s for > outer diameter for the 5400rpm drives. Yes, try 64k instead of 8k, and also compare read speeds. If you have the time (could take an hour or so), try "dd if=/dev/ad0 of=/dev/null bs=64k", run an "iostat 60" in another window, let the dd run through the entire disk, and compare the relative speeds from start to finish. For the DiamondMax 160, the sustained throughput should be 26MB -> 50MB as you go from inner to outer tracks. -- Dan Nelson [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Low HDD tranfer rate with FreeBSD 5.3-Release
> Eric Anderson wrote: > >> Amandeep wrote: >> >>> Hi all, >>> >>> I am using Tyan S2098 MB with 160GB Maxtor ATA Drive and the >>> transfer rate is very low. FreeBSD 5.3-Release. >>> Any ideas what is going on here. >>> >>> The transfer rate is about 15MB/s >>> >>> when I run >>> #dd if=/dev/zero of=/usr/junk bs=8192 >>> >>> then do >>> #iostat 1 >> >> >> >> You should probably provide the appropriate information from dmesg >> output, along with what you expect it to be, and the outputs of the dd >> command. >> >> Eric >> Amandeep wrote: Hi Eric, Shouldnt it be around 54MB/s for a regular IDE drive. Here is the output of dmesg and iostat [..snip dmesg blob..] IOSTAT tty ad0 cpu tin tout KB/t tps MB/s us ni sy in id 0 20 114.15 10 1.09 0 0 1 0 98 00 0.00 0 0.00 0 0 0 0 100 00 0.00 0 0.00 0 0 0 0 100 13 128.00 21 2.60 0 0 3 0 97 00 128.00 124 15.47 0 0 6 2 91 [..snip iostat blob..] (please try to avoid top-posting, it's hard to follow) What about other block sizes? Also - you should paste your actual dd output here too. What's the model number of that drive? Maxtor claims (on one of their 160G drives) 17.8MB/s from inner diameter disk and 35.6MB/s for outer diameter for the 5400rpm drives. Eric -- Eric AndersonSr. Systems AdministratorCentaur Technology A lost ounce of gold may be found, a lost moment of time never. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Low HDD tranfer rate with FreeBSD 5.3-Release
Hi Eric, Shouldnt it be around 54MB/s for a regular IDE drive. Here is the output of dmesg and iostat Copyright (c) 1992-2004 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD 5.3-RELEASE #0: Fri Nov 5 04:19:18 UTC 2004 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/GENERIC Timecounter "i8254" frequency 1193182 Hz quality 0 CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (2391.14-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0xf29 Stepping = 9 Features=0xbfebfbff real memory = 1064173568 (1014 MB) avail memory = 1031811072 (984 MB) ACPI APIC Table: ioapic0 irqs 0-23 on motherboard npx0: [FAST] npx0: on motherboard npx0: INT 16 interface acpi0: on motherboard acpi0: Power Button (fixed) Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000 acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0 cpu0: on acpi0 acpi_tz0: on acpi0 acpi_button0: on acpi0 pcib0: port 0xcf8-0xcff on acpi0 pci0: on pcib0 agp0: mem 0xe810-0xe817,0xe000-0xe7ff irq 16 at device 2.0 on pci0 agp0: detected 8060k stolen memory agp0: aperture size is 128M uhci0: port 0xe200-0xe21f irq 16 at device 29.0 on pci0 uhci0: [GIANT-LOCKED] usb0: on uhci0 usb0: USB revision 1.0 uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub0: 2 ports with 2 removable, self powered uhci1: port 0xe000-0xe01f irq 19 at device 29.1 on pci0 uhci1: [GIANT-LOCKED] usb1: on uhci1 usb1: USB revision 1.0 uhub1: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub1: 2 ports with 2 removable, self powered uhci2: port 0xe100-0xe11f irq 18 at device 29.2 on pci0 uhci2: [GIANT-LOCKED] usb2: on uhci2 usb2: USB revision 1.0 uhub2: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub2: 2 ports with 2 removable, self powered pci0: at device 29.7 (no driver attached) pcib1: at device 30.0 on pci0 pci1: on pcib1 em0: port 0xd000-0xd03f mem 0xe802-0xe803,0xe800-0xe801 irq 21 at device 3.0 on pci1 em0: Ethernet address: 00:e0:81:56:1e:64 em0: Speed:N/A Duplex:N/A em1: port 0xd100-0xd13f mem 0xe806-0xe807,0xe804-0xe805 irq 20 at device 4.0 on pci1 em1: Ethernet address: 00:e0:81:56:1e:65 em1: Speed:N/A Duplex:N/A isab0: at device 31.0 on pci0 isa0: on isab0 atapci0: port 0xf000-0xf00f,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 31.1 on pci0 ata0: channel #0 on atapci0 ata1: channel #1 on atapci0 pci0: at device 31.3 (no driver attached) fdc0: port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on acpi0 fdc0: [FAST] sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0 sio0: type 16550A sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0 sio1: type 16550A atkbdc0: port 0x64,0x60 irq 1 on acpi0 atkbd0: irq 1 on atkbdc0 kbd0 at atkbd0 atkbd0: [GIANT-LOCKED] psm0: irq 12 on atkbdc0 psm0: [GIANT-LOCKED] psm0: model IntelliMouse Explorer, device ID 4 orm0: at iomem 0xcc000-0xccfff on isa0 pmtimer0 on isa0 ppc0: parallel port not found. sc0: at flags 0x100 on isa0 sc0: VGA <16 virtual consoles, flags=0x300> vga0: at port 0x3c0-0x3df iomem 0xa-0xb on isa0 Timecounter "TSC" frequency 2391144260 Hz quality 800 Timecounters tick every 10.000 msec ad0: 156334MB [317632/16/63] at ata0-master UDMA100 acd0: DVDROM at ata1-master UDMA33 Mounting root from ufs:/dev/ad0s1a em0: Link is up 100 Mbps Full Duplex em0: Link is up 100 Mbps Full Duplex em0: Link is up 100 Mbps Full Duplex IOSTAT tty ad0 cpu tin tout KB/t tps MB/s us ni sy in id 0 20 114.15 10 1.09 0 0 1 0 98 00 0.00 0 0.00 0 0 0 0 100 00 0.00 0 0.00 0 0 0 0 100 13 128.00 21 2.60 0 0 3 0 97 00 128.00 124 15.47 0 0 6 2 91 00 117.49 133 15.22 0 0 6 0 94 00 128.00 124 15.47 0 0 8 0 92 00 126.11 125 15.36 0 0 10 2 88 00 128.00 124 15.47 0 0 8 0 92 00 128.00 124 15.47 0 0 6 0 94 00 127.10 123 15.24 0 0 6 0 94 00 128.00 124 15.47 2 0 8 1 90 00 127.10 124 15.36 0 0 10 0 90 00 128.00 124 15.47 0 0 6 0 94 00 127.10 123 15.24 0 0 7 1 92 00 128.00 124 15.47 0 0 7 1 92 00 121.77 128 15.19 0 0 9 1 90 00 128.00 124 15.47 0 0 8 0 92 00 127.10 123 15.24 0 0 7 1 92 12 128.00 124 15.47 0 0 6 0 94 Thanks for your help and replies. A Eric Anderson wrote: Amandeep wrote: Hi all, I am using Tyan S2098 MB with 160GB Maxtor ATA Drive and the transfer rate is very low. FreeBSD 5.3-Release. Any ideas what is going on here. The transfer rate is about 15MB/s when I run #dd if=/dev/zero of=/usr/junk bs=8192 then do #iostat 1 You should probably provide the appropriate information from dmesg output, along with what you expect it to be, and the outputs of the dd command. Eric ___ fr
Re: Low HDD tranfer rate with FreeBSD 5.3-Release
Amandeep wrote: Hi all, I am using Tyan S2098 MB with 160GB Maxtor ATA Drive and the transfer rate is very low. FreeBSD 5.3-Release. Any ideas what is going on here. The transfer rate is about 15MB/s when I run #dd if=/dev/zero of=/usr/junk bs=8192 then do #iostat 1 You should probably provide the appropriate information from dmesg output, along with what you expect it to be, and the outputs of the dd command. Eric -- Eric AndersonSr. Systems AdministratorCentaur Technology A lost ounce of gold may be found, a lost moment of time never. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Low HDD tranfer rate with FreeBSD 5.3-Release
Hi all, I am using Tyan S2098 MB with 160GB Maxtor ATA Drive and the transfer rate is very low. FreeBSD 5.3-Release. Any ideas what is going on here. The transfer rate is about 15MB/s when I run #dd if=/dev/zero of=/usr/junk bs=8192 then do #iostat 1 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
