DataDirect Networks S2A9550, User Manual

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D a t a D i r e c t N e t w o r k s S 2 A 9 5 5 0 U s e r G u i d e
M a n a g i n g t h e S 2 A 9 5 5 0
The
STATS DUAL
command displays the statistics for the dual mode messages
(Figure 3-38)
.
The STATS LENGTH command will display a histogram of the length of the host I/O requests in
16 KByte intervals
(Figure 3-39)
.
The
STATS OFFSET
command will display a histogram of the offset of the host I/O requests into the
cache segments
(Figure 3-40)
. Host I/O requests with offsets that are not in the 0x0 column may require
blocking/deblocking which can slow down the performance of the system.
The STATS REPEAT=OFF|MBS|IOS command allows you to enable/disable the repeating statistics
display where MBS displays MB/s, IOS displays IO/s, and OFF turns off (both) the repeating displays.
Dual Message Statistics
S2A [1]: stats dual
Figure 3-38 Dual Message Statistics Screen
Message Total Msgs/s
Lock requests 326839 0
Release requests 115 0
Lock acknowledges 301310 0
Lock requests received 301310 0
Release requests received 208 0
Lock acknowledges received 326840 0
Lock releases received 279194 0
Lock releases 294583 0
Total Messages sent 922847 0
Total Messages received 907552 0
Command Length Statistics
Length
S2A [1]: stats length
Port 1
Kbytes Reads Writes
Figure 3-39 Command Length Statistics Screen
Port 2
Reads Writes
Port 3
Reads Writes
Port 4
Reads Writes
> 0 0 0 55499 448D4 554EB 9FDF 0 0
> 16 0 0 0 1 2 1 0 0
> 32 0 0 0 1 2 1 0 0
> 48 0 0 1 2 0 2 0 0
> 64 0 0 228F9 23A45 22B43 2239C 0 0
> 80 0 0 0 1 0 2 0 0
> 96 0 0 0 1 0 2 0 0
> 112 0 0 71372 82626 15C9C 17DA5 0 0
> 144 0 0 0 0 0 0 0 0
> 160 0 0 0 0 0 2 0 0
> 176 0 0 0 0 0 0 0 0
> 192 0 0 0 0 0 1 0 0
> 208 0 0 0 0 2 1 0 0
> 224 0 0 0 0 2 1 0 0
> 240 0 0 0 0 8B7A 902E 0 0
> 256 0 0 0 0 2BB8D 35A2A 0 0
Host Command Offsets
S2A [1]: stats offset
x0 x1
Figure 3-40 Host Command Offsets Screen
x2 x3 x4 x5 x6 x7
0 720943 8 11 5 0 2 0 343AAD2
8 3FE8E9 5 10 1 0 2 0 3486F35
10 42754D 3 6 0 0 4 1 39B0635
18 4AA571 1 4 2 0 6 0 40677A9
Most commands should be in column 0 or 4 for the best performance.