From: caglarakyuz@gmail.com (Caglar Akyuz)
To: linux-arm-kernel@lists.infradead.org
Subject: Kernel Start-up Time
Date: Mon, 18 Jan 2010 10:10:01 +0200 [thread overview]
Message-ID: <201001181010.01975.caglarakyuz@gmail.com> (raw)
Hello,
While measuring Linux start-up time, I see that printing version string in
"start_kernel" takes ~1.3 seconds. I guess this is the time between from
"bootloader jumping to uImage" and "printing version string in generic
start_kernel code". Relevant part of my boot log is attached.
My question: is it normal this 1.3 sec init time? My system is 297 MHZ
arm926ej-s with a 162MHZ DDR2 memory.
Sorry for my ignorance but I'm not good at ARM assembly, so I'm unable to
bench early boot.
Thanks,
Caglar
_____________________________________________________________________
[ 4.390970] Bytes transferred = 3349376 (331b80 hex)
[ 4.663038] ## Booting kernel from Legacy Image at 80700000 ...
[ 4.668940] Image Name: Linux-2.6.30-davinci1-06079-g4e7
[ 4.672999] Image Type: ARM Linux Kernel Image (uncompressed)
[ 4.677999] Data Size: 3349312 Bytes = 3.2 MB
[ 4.681965] Load Address: 80008000
[ 4.684007] Entry Point: 80008000
[ 4.686043] Loading Kernel Image ... OK
[ 4.696911] OK
[ 4.700878]
[ 4.700896] Starting kernel ...
[ 4.702971]
[ 5.966039] [ 0.000000] Linux version 2.6.30-davinci1-06079-g4e73fae-
dirty (caglar at ycaserv) (gcc version 4.3.3 (GCC) ) #393 PREEMPT Mon Jan 18
10:03:47 EET 2010
[ 5.979054] [ 0.000000] CPU: ARM926EJ-S [41069265] revision 5
(ARMv5TEJ), cr=00053177
[ 5.985952] [ 0.000000] CPU: VIVT data cache, VIVT instruction cache
next reply other threads:[~2010-01-18 8:10 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-18 8:10 Caglar Akyuz [this message]
2010-01-18 8:39 ` Kernel Start-up Time Tonyliu
2010-01-18 8:54 ` Caglar Akyuz
2010-01-18 15:39 ` Steve Chen
2010-01-18 19:39 ` Dirk Behme
2010-01-19 8:40 ` Caglar Akyuz
2010-01-19 8:36 ` Caglar Akyuz
2010-01-19 9:02 ` Russell King - ARM Linux
2010-01-19 14:31 ` Caglar Akyuz
2010-01-19 11:04 ` Bahadir Balban
2010-01-19 14:40 ` Caglar Akyuz
2010-01-19 11:04 ` Johannes Stezenbach
2010-01-19 14:35 ` Caglar Akyuz
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