Sun Microsystems Dual XFP, User Manual, Page: 62 / 100

44 Sun Dual 10GbE XFP PCI Express Card User’s Guide • January 2009
3. Add the following to a startup script, or use ndd before plumbing the interface:
Utilizing more soft-rings provided by the Solaris TCP/IP stack significantly
improves bulk throughput for Rx. The default number of soft-rings is 2, but
changing it to 8 improves performance. (You can increase the number to 16 in
UltraSparc-T1 based systems).
▼ To Improve Performance on an AMD CPU Based
Sun Platform
1. Enable soft-rings and change to a higher value than the default of 2 by adding the
following to the
/etc/system
file:
Bulk throughput for Rx can be significantly improved by utilizing more soft-rings
provided by the Solaris TCP/IP stack. Soft-rings are disabled by default in previous
and current releases of the Solaris-x86 Operating System.
2. Reboot the system:
3. Set the MSI to 1 on AMD platforms by adding following to the
/etc/system
file:
4. Reboot the system:
#
ndd -set /dev/ip ip_soft_rings_cnt 8
set ip:ip_squeue_fanout=1
set ip_squeue_soft_ring=1
# reboot -r
set ddi_msix_alloc_limit=1
# reboot -r