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1，如何强制把网卡速率改为1000mbps,
2，rfc1323有多少对网络吞吐改善多大（CPU，内存与磁盘充足下）
3，remmtu 576 为何不是1500?,是否合适，如果不舒适如何改变此值？
# oslevel
7.1.0.0
# netstat -v ent1 | grep -p 'Specific Statistics'
2-Port 10/100/1000 Base-TX PCI-Express Adapter (14104003) Specific Statistics:
------------------------------------------------------------------------------
Link Status : Up
Media Speed Selected: Auto negotiation
Media Speed Running: 1000 Mbps Full Duplex
PCI Mode: PCI-Express X4
Relaxed Ordering: Enabled
TLP Size: 256
MRR Size: 2048
Jumbo Frames: Disabled
TCP Segmentation Offload: Enabled
TCP Segmentation Offload Packets Transmitted: 110533
TCP Segmentation Offload Packet Errors: 0
Transmit and Receive Flow Control Status: Enabled
XON Flow Control Packets Transmitted: 0
XON Flow Control Packets Received: 0
XOFF Flow Control Packets Transmitted: 0
XOFF Flow Control Packets Received: 0
Transmit and Receive Flow Control Threshold (High): 40960
Transmit and Receive Flow Control Threshold (Low): 20480
Transmit and Receive Storage Allocation (TX/RX): 4/44
# lsattr -El en1
alias4 IPv4 Alias including Subnet Mask True
alias6 IPv6 Alias including Prefix Length True
arp on Address Resolution Protocol (ARP) True
authority Authorized Users True
broadcast Broadcast Address True
mtu 1500 Maximum IP Packet Size for This Device True
netaddr 192.168.0.3 Internet Address True
netaddr6 IPv6 Internet Address True
netmask 255.255.255.0 Subnet Mask True
prefixlen Prefix Length for IPv6 Internet Address True
remmtu 576 Maximum IP Packet Size for REMOTE Networks True
rfc1323 Enable/Disable TCP RFC 1323 Window Scaling True
security none Security Level True
state up Current Interface Status True
tcp_mssdflt Set TCP Maximum Segment Size True
tcp_nodelay Enable/Disable TCP_NODELAY Option True
tcp_recvspace Set Socket Buffer Space for Receiving True
tcp_sendspace Set Socket Buffer Space for Sending True
#
# lsattr -El ent1
alt_addr 0x000000000000 Alternate ethernet address True
busintr 534 Bus interrupt level False
busmem 0xffea0000 Bus memory address False
chksum_offload yes Enable hardware transmit and receive checksum True
compat_mode no Gigabit Backward compatability True
copy_bytes 2048 Copy packet if this many or less bytes True
delay_open no Enable delay of open until link state is known True
failback yes Enable auto failback to primary True
failback_delay 15 Failback to primary delay timer True
failover disable Enable failover mode True
flow_ctrl yes Enable Transmit and Receive Flow Control True
intr_priority 3 Interrupt priority False
intr_rate 10000 Max rate of interrupts generated by adapter True
jumbo_frames no Transmit jumbo frames True
large_send yes Enable hardware TX TCP resegmentation True
link_up_timer 0 Link up notification delay timer True
media_speed Auto_Negotiation Media speed True
rom_mem 0xffec0000 ROM memory address False
rx_hog 1000 Max rcv buffers processed per rcv interrupt True
rxbuf_pool_sz 2048 Rcv buffer pool, make 2X rxdesc_que_sz True
rxdesc_que_sz 1024 Rcv descriptor queue size True
slih_hog 1 Max Interrupt events processed per interrupt True
tx_que_sz 8192 Software transmit queue size True
txdesc_que_sz 512 TX descriptor queue size True
use_alt_addr no Enable alternate ethernet address True
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发表于 2012-06-10 18:21
