Hi,
I used several filesystems based on MTD vs ramdisk to
test boot time on RPXlite DW and got the following
result:
Common condition:
1) 2.4.18[uncompressed] + 48MHZ[CORE] + 48MHZ[BUS] +
converted SELF
2) console=ttyS0,9600
Filesytem I II III[Total]
ramdisk 01"14 11"97 16"79
JFFS2 01"14 10"07 15"39
Cramfs 01"14 07"60 12"54
Ext2 01"14 13"68
u-boot>run flash_self
<---------------- START TIME : 00"00
## Booting image at ff080000 ...
Image Name: RPXlite DW uncompressed kernel
Image Type: PowerPC Linux Kernel Image
(uncompressed)
Data Size: 1256048 Bytes = 1.2 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
OK
<--------------------- Pharse I
Linux version 2.4.18_ ...
......
Kernel command line: console=ttyS0,9600
root=/dev/mtdblock3 rw
ip=172.16.115.7:172.16.115.6:172.16.115.254:255.255.255.0::eth0:off
panic=1
......
Memory: 62780k available (1008k kernel code, 332k
data, 64k init, 0k highmem)
Dentry-cache hash table entries: 8192 (order: 4, 65536
bytes)
Inode-cache hash table entries: 4096 (order: 3, 32768
bytes)
Mount-cache hash table entries: 1024 (order: 1, 8192
bytes)
Buffer-cache hash table entries: 4096 (order: 2, 16384
bytes)
Page-cache hash table entries: 16384 (order: 4, 65536
bytes)
.....
Creating 3 MTD partitions on "RPX":
0x00000000-0x00080000 : "RPXLITE flash U-BOOT
partition"
0x00080000-0x00200000 : "RPXLITE flash KERNEL
partition"
0x00200000-0x01000000 : "RPXLITE flash APPLICATION
partition"..
......
IP-Config: Complete:
device=eth0, addr=172.16.115.7,
mask=255.255.255.0, gw=172.16.115.254,
host=172.16.115.7, domain=, nis-domain=(none),
bootserver=172.16.115.6, rootserver=172.16.115.6,
rootpath=
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
VFS: Mounted root (jffs2 filesystem).
Freeing unused kernel memory: 64k init
< ----------------------- Phrase II
My application is running ... Sam Song
Feb.7,2004
BusyBox v0.60.1 (2002.10.24-04:52+0000) Built-in shell
(msh)
Enter 'help' for a list of built-in commands.
# Hello Shanghai Univ.
Hi Everybody!
< ----------------------- Phrase III
------------------------------------------------
It seemed that Cramfs filesystem could get the most
fast boot time.Also No matter how I tried,the boot
time still exceeded 12 seconds at least.But this
result is not the same as Wolfgang said,5~6 seconds
boot time on 8xx board with 50MHZ core and bus
frequency.Where did I go wrong?
I would be satisfied with less than 8 seconds in my
case.Any ideas?
Thanks in advance!
Best regards,
Sam
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