Proc/Irq; Proc/Net - Red Hat ENTERPRISE LINUX 5 - DEPLOYMENT Deployment Manual

• geometry — The physical and logical geometry of the device.
• media — The type of device, such as a disk.
• model — The model name or number of the device.
• settings — A collection of current device parameters. This file usually contains quite a bit of
useful, technical information. A sample settings file for a standard IDE hard disk looks similar to
the following:
name
----
acoustic
address
bios_cyl
bios_head
bios_sect
bswap
current_speed
failures
init_speed
io_32bit
keepsettings
lun
max_failures
multcount
nice1
nowerr
number
pio_mode
unmaskirq
using_dma
wcache

3.3.6. /proc/irq/

This directory is used to set IRQ to CPU affinity, which allows the system to connect a particular IRQ
to only one CPU. Alternatively, it can exclude a CPU from handling any IRQs.
Each IRQ has its own directory, allowing for the individual configuration of each IRQ. The /proc/
irq/prof_cpu_mask file is a bitmask that contains the default values for the smp_affinity file in
the IRQ directory. The values in smp_affinity specify which CPUs handle that particular IRQ.
For more information about the /proc/irq/ directory, refer to the following installed documentation:
/usr/share/doc/kernel-doc-<version>/Documentation/filesystems/proc.txt

3.3.7. /proc/net/

This directory provides a comprehensive look at various networking parameters and statistics. Each
directory and virtual file within this directory describes aspects of the system's network configuration.
Below is a partial list of the /proc/net/ directory:
• arp — Lists the kernel's ARP table. This file is particularly useful for connecting a hardware address
to an IP address on a system.
value min
----- ---
0 0
0 0
38752 0
16 0
63 0
0 0
68 0
0 0
68 0
0 0
0 0
0 0
1 0
16 0
1 0
0 0
0 0
write-only 0
0 0
1 0
1 0
max mode
--- ----
254 rw
2 rw
65535 rw
255 rw
63 rw
1 r
70 rw
65535 rw
70 rw
3 rw
1 rw
7 rw
65535 rw
16 rw
1 rw
1 rw
3 rw
255 w
1 rw
1 rw
1 rw
/proc/irq/
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