When I copy a file(13Megs) from /home/ to /tmp/, sync takes almost 2 minutes.
When I copy the same file to /usr/local/, sync returns almost right away. Both
filesystems are ext3 and are on the same harddrive. When sync is running,
the harddrive light stays on but I don't hear it doing anything. dmesg doesn't
show any errors either. Below is the `time` output for each command. If you
need anymore information let me know..
The CPU is a PIII866 with 512MB RAM.
$ uname -a
Linux dev-01 2.4.19-pre10-ac2 #3 Sun Jun 30 18:56:04 EDT 2002 i686 unknown
$ hdparm /dev/hda
/dev/hda:
multcount = 16 (on)
I/O support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 1868/255/63, sectors = 30015216, start = 0
busstate = 1 (on)
$ cat /proc/mounts
/dev/hda1 / ext3 rw,noatime 0 0
/dev/hda2 /home ext3 rw,noatime 0 0
/dev/hda3 /usr ext3 rw,noatime 0 0
$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/hda1 387M 162M 205M 45% /
/dev/hda2 3.4G 2.1G 1.1G 65% /home
/dev/hda3 10G 6.3G 3.4G 65% /usr
$ cat /proc/ide/via
----------VIA BusMastering IDE Configuration----------------
Driver Version: 3.34
South Bridge: VIA vt82c686b
Revision: ISA 0x40 IDE 0x6
Highest DMA rate: UDMA100
BM-DMA base: 0xc000
PCI clock: 33.3MHz
Master Read Cycle IRDY: 0ws
Master Write Cycle IRDY: 0ws
BM IDE Status Register Read Retry: yes
Max DRDY Pulse Width: No limit
-----------------------Primary IDE-------Secondary IDE------
Read DMA FIFO flush: yes yes
End Sector FIFO flush: no no
Prefetch Buffer: no no
Post Write Buffer: no no
Enabled: yes yes
Simplex only: no no
Cable Type: 80w 40w
-------------------drive0----drive1----drive2----drive3-----
Transfer Mode: UDMA PIO PIO PIO
Address Setup: 30ns 120ns 30ns 120ns
Cmd Active: 90ns 90ns 90ns 90ns
Cmd Recovery: 30ns 30ns 30ns 30ns
Data Active: 90ns 330ns 90ns 330ns
Data Recovery: 30ns 270ns 30ns 270ns
Cycle Time: 30ns 600ns 120ns 600ns
Transfer Rate: 66.6MB/s 3.3MB/s 16.6MB/s 3.3MB/s
$ ls -al mozilla-i686-pc-linux-gnu-sea.tar.gz
-rw-rw-r-- 1 khromy khromy 13M Jul 2 07:42
mozilla-i686-pc-linux-gnu-sea.tar.gz
* time output when I copy to /usr/local
$ time cp mozilla-i686-pc-linux-gnu-sea.tar.gz /usr/local/
0.00user 0.19system 0:00.18elapsed 102%CPU (0avgtext+0avgdata 0maxresident)k
$ time sync
0.00user 0.00system 0:00.00elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k
$ time rm /usr/local/mozilla-i686-pc-linux-gnu-sea.tar.gz
0.00user 0.00system 0:00.00elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k
* time output when I copy to /tmp
$ time cp mozilla-i686-pc-linux-gnu-sea.tar.gz /tmp/
0.01user 0.24system 0:00.25elapsed 98%CPU (0avgtext+0avgdata 0maxresident)k
$ time sync
0.00user 0.05system 1:39.14elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k
$ time rm /tmp/mozilla-i686-pc-linux-gnu-sea.tar.gz
0.00user 0.05system 0:00.05elapsed 98%CPU (0avgtext+0avgdata 0maxresident)k
-- L1: khromy ;khromy(at)lnuxlab.ath.cx - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sun Jul 07 2002 - 22:00:10 EST