[9fans] Is this Plan9 performance, Ok

[9fans] Is this Plan9 performance, Ok

[Balwinder S Dheeman]

Extraction of only a 180M archive knelled down a 1.8Ghz/P-M4/i686/1Gb
RAM/40GiB IDE HDD machine running vanilla Plan9 installed natively:

term% cat /dev/sdC0/ctl |grep dma
config 0040 capabilities 2F00 dma 00550020 dmactl 00550020 rwm 8 rwmctl 0
term% time /n/mon/mnt/sda9/Downloads/Plan9/mroot-linuxemu.tbz2
...
183.27u 31.06s 623.86r   tar zxf
/n/mon/mnt/sda9/Downloads/Plan9/mroot-linuxemu.tbz2
term% ls -l /n/mon/mnt/sda9/Downloads/Plan9/mroot-linuxemu.tbz2
--rw-rw-r-- M 47 root wheel 188569960 Apr  8 16:15
/n/mon/mnt/sda9/Downloads/Plan9/mroot-archlinux.tar.bz2
term% pci -v
0.0.0:  brg  06.00.00 8086/1a30   0
        Intel Corporation 82845G[GL/GV/GE/PE] Host-Hub Interface Bridge
0.1.0:  brg  06.04.00 8086/1a31   0
        Intel Corporation 82845[MP/MZ] AGP Bridge
0.29.0: usb  0c.03.00 8086/2482  11 4:0000bf81 32
        Intel Corporation 82801CA/CAM USB Controller
0.30.0: brg  06.04.00 8086/2448   0
        Intel Corporation 82801BAM/CAM/DBM Hub Interface to PCI Bridge
0.31.0: brg  06.01.00 8086/248c   0
        Intel Corporation 82801CAM LPC Interface or ISA bridge: see Notes
0.31.1: disk 01.01.8a 8086/248a  11 0:000001f1 16 1:000003f5 16
2:00000171 16 3:00000375 16 4:0000bfa1 16 5:00000000 1024
        Intel Corporation 82801CAM UltraATA IDE Controller
0.31.5: aud  04.01.00 8086/2485  11 0:0000d801 256 1:0000dc81 64
        Intel Corporation 82801CA/CAM AC97 Audio Controller
0.31.6: ser  07.03.00 8086/2486  11 0:0000d401 256 1:0000dc01 128
        Intel Corporation 82801CA/CAM AC 97 Modem Controller
1.0.0:  vid  03.00.00 1002/4c57  11 0:e0000008 134217728 1:0000c001 256
2:fcff0000 65536
        ATI  Technologies  Inc. fdds Radeon Mobility M7 LW
2.0.0:  net  02.00.00 10b7/9200  11 0:0000ec81 128 1:f8fffc00 128
        3Com Corporation 3C905 CX-TX-M Fast EtherLink for PC Management NIC
2.1.0:  brg  06.07.00 104c/ac51  11
        Texas Instruments PCI-1420 Texas Instruments 1420
2.1.1:  brg  06.07.00 104c/ac51  11
        Texas Instruments PCI-1420 Texas Instruments 1420
2.3.0:  net  02.00.00 168c/001b  11 0:f8fe0000 65536
        Atheros Communications Inc. AR5006X 802.11abg NIC

Moreover, it is strange that Plan9 running under QEMU on 2.4Ghz/Core2
Duo/2Gb RAM/250GiB SATA/IDE HDD machine out performs a natively
installed one.

--
Dr Balwinder S "bsd" Dheeman          Registered Linux User: #229709
Anu'z Linux@HOME (Unix Shoppe)        Machines: #168573, 170593, 259192
Chandigarh, UT, 160062, India         Plan9, T2, Arch/Debian/FreeBSD/XP
Home: http://cto.homelinux.net/~bsd/  Visit: http://counter.li.org/

Re: [9fans] Is this Plan9 performance, Ok

[maht]

> /n/mon/mnt/sda9/Downloads/Plan9/mroot-linuxemu.tbz2
how is that mounted ?

you've got two issues, how the tbz2 get to plan9 and then how long it
takes to unzip

try
% cd
% time cp /n/mon/mnt/sda9/Downloads/Plan9/mroot-linuxemu.tbz2 .
% time zxf mroot-linuxemu.tbz2
so we know what it is you're timing

Re: [9fans] Is this Plan9 performance, Ok

[erik quanstrom]

On Thu Apr  9 05:18:31 EDT 2009, bdheeman@gmail.com wrote:
> Extraction of only a 180M archive knelled down a 1.8Ghz/P-M4/i686/1Gb
> RAM/40GiB IDE HDD machine running vanilla Plan9 installed natively:
>
> term% cat /dev/sdC0/ctl |grep dma
> config 0040 capabilities 2F00 dma 00550020 dmactl 00550020 rwm 8 rwmctl 0
> term% time /n/mon/mnt/sda9/Downloads/Plan9/mroot-linuxemu.tbz2
> ...
> 183.27u 31.06s 623.86r   tar zxf
> /n/mon/mnt/sda9/Downloads/Plan9/mroot-linuxemu.tbz2
> term% ls -l /n/mon/mnt/sda9/Downloads/Plan9/mroot-linuxemu.tbz2
> --rw-rw-r-- M 47 root wheel 188569960 Apr  8 16:15

a laptop drive of that general description is probablly good for 20mb/s
sequential io.  assuming that the uncompressed archive is 3x larger,
you're getting about 1mb/s writes even with the slow decompression.

it looks like that archive is pulled over the network.  since you have
a 3c905, that would be at a maximum of about 10mb/s.  if you're
linked at 10mb/s, the limit is about 1mb/s.

i'd recommend checking the drive's speed with dd.
	time dd -if /dev/sdC0/data -of /dev/null -count 5000 -bs 64k

i don't recall if the 3c905 will tell you its link speed.  you can
try /dev/kmesg or /net/ether0/ifstats under mbps.  the latter may be
the maximum mbps the card is capable of, due to the fact mbps is
used to size queues.

i like the suggestion to time pulling down the archive and sending it
to /dev/null.  since you have enough memory.  you could seperately
time extracting it to ramfs.

> Moreover, it is strange that Plan9 running under QEMU on 2.4Ghz/Core2
> Duo/2Gb RAM/250GiB SATA/IDE HDD machine out performs a natively
> installed one.

what is slower, exactly?

- erik