kmbucket subcommand
The kmbucket subcommand prints kernel memory allocator buckets.
Format
kmbucket [-l] [-c cpu] [-i index] [effectiveaddress]
kmbucket -k effectiveaddress
kmbucket -s
Parameters
| Item | Description |
|---|---|
| -l | Displays the bucket free list.
Restriction: You must specify the -l flag
with the -c cpu or -s flags,
because kmbucket -l does not
show any output.
|
| -c cpu | Displays only buckets for the specified processor. Specify the cpu parameter as a decimal value. |
| -i index | Displays only the bucket for the specified index. The index is specified as a decimal value. |
| effectiveaddress | Specifies the effective address of the kmembucket structure to display. Use symbols, hexadecimal values, or hexadecimal expressions to specify the address. |
| -k | Displays the kmemusage structure associated with the effectiveaddress. |
| -s | Displays the netkmem structure. |
If no arguments are specified, information is displayed for all allocator buckets for each processor.
Other
bucket
Examples
The following is an example of how to use the kmbucket subcommand:
KDB(0)> kmbucket -c 0 -i 11
displaying kmembucket for cpu 0 offset 11 size 0x00000800
address...............F10006000BD8BD48 b_next..(x)...........F100061002AD1000
b_calls..(x)..........0000000000001405 b_total..(x)..........000000000000080A
b_totalfree..(x)......0000000000000006 b_elmpercl..(x).......0000000000000002
b_highwat..(x)........00000000000007AD b_couldfree (sic).(x).0000000000000000
b_failed..(x).........0000000000000000 b_delayed.............0000000000000000
lock............... @ F10006000BD8BD90 lock..(x).............0000000000000000
delta.................FFFFFFFFFFFFD800
KDB(0)> kmbucket F10006000BD8BD48 //address field from above
displaying kmembucket for cpu 0 offset 11 size 0x00000800
address...............F10006000BD8BD48 b_next..(x)...........F100061002ACB000
b_calls..(x)..........0000000000001407 b_total..(x)..........000000000000080A
b_totalfree..(x)......0000000000000005 b_elmpercl..(x).......0000000000000002
b_highwat..(x)........00000000000007AD b_couldfree (sic).(x).0000000000000000
b_failed..(x).........0000000000000000 b_delayed.............0000000000000000
lock............... @ F10006000BD8BD90 lock..(x).............0000000000000000
delta.................FFFFFFFFFFFFE000
Bucket free list.....
1 next........F100061002ACB000 prev...00000000,
kmemusage...F10006000BE08308 [000B 0002 00000000]
2 next........F100061002AE0800 prev...F100061002ACB000,
kmemusage...F10006000BE08500 [000B 0001 00000000]
3 next........F100061002AC8000 prev...F100061002AE0800,
kmemusage...F10006000BE082C0 [000B 0002 00000000]
4 next........F100061002AC8800 prev...F100061002AC8000,
kmemusage...F10006000BE082C0 [000B 0002 00000000]
5 next........F100061002ACB800 prev...F100061002AC8800,
kmemusage...F10006000BE08308 [000B 0002 00000000]
KDB(0)> kmbucket -k F100061002ACB000 //one of the next fields from above
This address belongs to the following kmemusage structure :
kmemusage address.....F10006000BE08308
ku_indx.....0000000B free/page cnt.....00000002 ku_cpu.....00000000
KDB(0)>