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You can use the strstat command of
crash(ADM)
to study how STREAMS resources
are being used on the system. The output of this command
is similar to that produced using the command netstat -m
as described in the
Performance Guide.
The following is an example of output from strstat:
> strstat
ITEM CONFIG ALLOC FREE TOTAL MAX FAIL BUFCALL
streams 160 79 81 2515 89 0 -
queues 452 374 78 5074 416 0 -
message headers 100 39 61 182337 87 0 -
buffer headers 314 194 120 46826 201 0 -
data block size 64 64 1 63 120940 49 0 -
data block size 128 32 0 32 1538 5 0 -
data block size 256 32 3 29 2995 19 0 -
data block size 512 16 8 8 5875 15 0 -
data block size 1Kb 8 0 8 2846 5 0 -
...
data block size 512Kb 0 0 0 0 0 0 -
Count of scheduled queues: 0
Number of unallocated pages: 466
Buffer splitting threshold: 80
Size of the interrupt pool: 20
Streams daemon (strd) flags:
The CONFIG column shows the total number
of each resource that was configured for use, and
MAX is the maximum number
that have been allocated at any one time.
ALLOC is the number that are currently allocated,
and TOTAL is the total number
that have been used since the system was booted.
FAIL is the number of times that a resource
was unavailable since the system was booted.
Since data blocks are dynamically allocated
from the memory reserved for use by STREAMS, you
should not expect to see any value other than 0 in the
this column.
See the Performance Guide for more information about examining and tuning STREAMS resources.