Date: Sun, 5 Apr 1998 19:50:44 -0700 (PDT) From: Tamiji Homma <thomma@slip.net> To: freebsd-current@FreeBSD.ORG Subject: disk performance difference Message-ID: <E0yM1zh-0006HN-00@slip-3>
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Hi,
I am not a -current but SNAP CD user. I noticed something interesting,
that 19971006-SNAP disk performance is much greater than 19980222-SNAP
specially on my SCSI disk according to what Bonnie's says. In fact,
SCSI disk performance is very poor...
However, if I compare 'make buildworld' of 19980222-SNAP source
using two different kernels(the same everything but kernel), I get:
19980222-SNAP: 3315.51 real 2313.34 user 599.32 sys
19971006-SNAP: 3370.48 real 2328.91 user 633.53 sys
The 'make buildworld' is done under following conditions:
/usr/src on wd0
/usr/obj on ccd0 (/dev/sd0c /dev/sd1c)
NOPROFILE, NOCLEAN, NOTCL, -pipe, async,noatime
I don't see much difference (actually faster on newer SNAP, which is
good:) between two SNAPs when I do make buildworld.
Can anybody elaborate why?
Here is Bonnie's result on my system:
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
wd0-98 100 7606 75.3 3325 11.2 2513 15.5 9722 81.9 9872 24.2 162.9 3.3
wd0-97 100 7852 83.1 4507 17.0 2134 16.7 9773 93.7 9804 35.0 160.9 4.4
wd2-98 100 9326 94.4 8837 32.2 4193 20.4 10137 94.1 11244 33.5 148.4 3.2
wd2-97 100 8926 95.9 10799 44.5 3158 23.4 9014 93.4 11279 47.9 153.3 4.2
sd0c-98 100 2078 16.8 1503 3.6 1823 6.7 5133 41.6 5160 12.8 154.3 3.0
sd0c-97 100 6209 53.8 6295 18.4 2998 13.5 6237 50.6 6282 15.4 174.6 4.7
sd1c-98 100 2039 16.4 1489 3.5 1795 6.6 5094 40.7 5117 12.8 159.5 3.1
sd1c-97 100 5993 51.4 6110 17.8 2921 13.2 6060 49.2 6071 15.2 182.4 4.9
ccd0-98 100 2142 17.4 2030 5.0 1367 5.4 5136 42.1 5149 13.5 243.6 5.1
ccd0-97 100 9374 84.6 9801 31.8 3914 19.9 8515 71.6 8641 23.8 261.4 7.2
98: 19980222-SNAP kernel
97: 19971006-SNAP kernel
CPU: AMD-K6tm w/ multimedia extensions (262.50-MHz 586-class CPU)
Origin = "AuthenticAMD" Id = 0x562 Stepping=2
Features=0x8001bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,MMX>
real memory = 67108864 (65536K bytes)
avail memory = 62513152 (61048K bytes)
Probing for devices on PCI bus 0:
chip0: <Host to PCI bridge (vendor=1106 device=1595)> rev 0x03 on pci0.0.0
chip1: <PCI to ISA bridge (vendor=1106 device=0586)> rev 0x25 on pci0.7.0
ide_pci0: <VIA 82C586x (Apollo) Bus-master IDE controller> rev 0x06 on pci0.7.1
wdc0 at 0x1f0-0x1f7 irq 14 flags 0xa0ffa0ff on isa
wdc0: unit 0 (wd0): <IBM-DHEA-36480>, DMA, 32-bit, multi-block-16
wd0: 6197MB (12692736 sectors), 12592 cyls, 16 heads, 63 S/T, 512 B/S
wdc1 at 0x170-0x177 irq 15 flags 0xa0ffa0ff on isa
wdc1: unit 0 (wd2): <QUANTUM FIREBALL SE6.4A>, DMA, 32-bit, multi-block-16
wd2: 6149MB (12594960 sectors), 13328 cyls, 15 heads, 63 S/T, 512 B/S
...
ncr0: <ncr 53c875 fast20 wide scsi> rev 0x03 int a irq 11 on pci0.8.0
ncr0: waiting for scsi devices to settle
scbus0 at ncr0 bus 0
sd0 at scbus0 target 0 lun 0
sd0: <CONNER CFP2107E 2.14GB 1527> type 0 fixed SCSI 2
sd0: Direct-Access
sd0: WIDE SCSI (16 bit) enabled
sd0: 20.0 MB/s (100 ns, offset 15)
2048MB (4194304 512 byte sectors)
sd1 at scbus0 target 1 lun 0
sd1: <CONNER CFP2107E 2.14GB 1527> type 0 fixed SCSI 2
sd1: Direct-Access
sd1: WIDE SCSI (16 bit) enabled
sd1: 20.0 MB/s (100 ns, offset 15)
2048MB (4194304 512 byte sectors)
Filesystem 1K-blocks Used Avail Capacity Mounted on
/dev/wd0a 31743 17319 11885 59% /
/dev/wd0s1f 5737885 1358996 3919859 26% /usr (used for bonnie)
/dev/wd0s1e 127023 1440 115422 1% /var
/dev/wd2a 31743 15785 13419 54% /w/root
/dev/wd2e 127023 1201 115661 1% /w/var
/dev/wd2f 5690005 1563145 3671660 30% /w/usr (used for bonnie)
procfs 4 4 0 100% /proc
/dev/sd0c 2032623 1 1870013 0% /u1 (used for bonnie)
/dev/sd1c 2032623 1 1870013 0% /u2 (used for bonnie)
Thanks
Tammy
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