IBM REDP-4285-00 User Manual
Chapter 4. Tuning the operating system
95
Draft Document for Review May 4, 2007 11:35 am
4285ch04.fm
In addition, with dmesg, you can determine what hardware is installed on your server. During
every boot, Linux checks your hardware and logs information about it. You can view these
logs using the command /bin/dmesg.
every boot, Linux checks your hardware and logs information about it. You can view these
logs using the command /bin/dmesg.
Example 4-1 partial output from dmesg
Linux version 2.6.18-8.el5 (brewbuilder@ls20-bc1-14.build.redhat.com) (gcc version 4.1.1
20070105 (Red Hat 4.1.
1-52)) #1 SMP Fri Jan 26 14:15:14 EST 2007
Command line: ro root=/dev/VolGroup00/LogVol00 rhgb quiet
20070105 (Red Hat 4.1.
1-52)) #1 SMP Fri Jan 26 14:15:14 EST 2007
Command line: ro root=/dev/VolGroup00/LogVol00 rhgb quiet
No NUMA configuration found
Faking a node at 0000000000000000-0000000140000000
Bootmem setup node 0 0000000000000000-0000000140000000
On node 0 totalpages: 1029288
DMA zone: 2726 pages, LIFO batch:0
DMA32 zone: 768002 pages, LIFO batch:31
Normal zone: 258560 pages, LIFO batch:31
Faking a node at 0000000000000000-0000000140000000
Bootmem setup node 0 0000000000000000-0000000140000000
On node 0 totalpages: 1029288
DMA zone: 2726 pages, LIFO batch:0
DMA32 zone: 768002 pages, LIFO batch:31
Normal zone: 258560 pages, LIFO batch:31
Kernel command line: ro root=/dev/VolGroup00/LogVol00 rhgb quiet
Initializing CPU#0
Initializing CPU#0
Memory: 4042196k/5242880k available (2397k kernel code, 151492k reserved, 1222k data, 196k
init)
Calibrating delay using timer specific routine.. 7203.13 BogoMIPS (lpj=3601568)
Security Framework v1.0.0 initialized
SELinux: Initializing.
SELinux: Starting in permissive mode
init)
Calibrating delay using timer specific routine.. 7203.13 BogoMIPS (lpj=3601568)
Security Framework v1.0.0 initialized
SELinux: Initializing.
SELinux: Starting in permissive mode
CPU: Trace cache: 12K uops, L1 D cache: 16K
CPU: L2 cache: 1024K
using mwait in idle threads.
CPU: Physical Processor ID: 0
CPU: Processor Core ID: 0
CPU0: Thermal monitoring enabled (TM2)
SMP alternatives: switching to UP code
ACPI: Core revision 20060707
Using local APIC timer interrupts.
result 12500514
Detected 12.500 MHz APIC timer.
SMP alternatives: switching to SMP code
CPU: L2 cache: 1024K
using mwait in idle threads.
CPU: Physical Processor ID: 0
CPU: Processor Core ID: 0
CPU0: Thermal monitoring enabled (TM2)
SMP alternatives: switching to UP code
ACPI: Core revision 20060707
Using local APIC timer interrupts.
result 12500514
Detected 12.500 MHz APIC timer.
SMP alternatives: switching to SMP code
sizeof(vma)=176 bytes
sizeof(page)=56 bytes
sizeof(inode)=560 bytes
sizeof(dentry)=216 bytes
sizeof(ext3inode)=760 bytes
sizeof(buffer_head)=96 bytes
sizeof(skbuff)=240 bytes
sizeof(page)=56 bytes
sizeof(inode)=560 bytes
sizeof(dentry)=216 bytes
sizeof(ext3inode)=760 bytes
sizeof(buffer_head)=96 bytes
sizeof(skbuff)=240 bytes
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
SCSI device sda: 143372288 512-byte hdwr sectors (73407 MB)
sda: assuming Write Enabled
sda: assuming drive cache: write through
sda: assuming Write Enabled
sda: assuming drive cache: write through
eth0: Tigon3 [partno(BCM95721) rev 4101 PHY(5750)] (PCI Express) 10/100/1000BaseT Ethernet
00:11:25:3f:19:b4
00:11:25:3f:19:b4