d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Specify a maximum TSO length limiting the segment chain to what the

Browse Source 
Xen host side can handle after defragmentation.

This prevents the driver from throwing away too long TSO chains and
improves the performance on Amazon AWS instances with 10GigE virtual
interfaces to the normally expected throughput.

Submitted by:	cperciva (earlier version)
Reviewed by:	cperciva
Tested by:	cperciva
MFC after:	1 week
This commit is contained in:
andre 2013-06-03 13:00:33 +00:00
parent b706ceb4ab
commit ad87662b89
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sys/dev/xen/netfront/netfront.c
View File

@ -134,6 +134,7 @@ static const int MODPARM_rx_flip = 0;
* to mirror the Linux MAX_SKB_FRAGS constant.
*/
#define MAX_TX_REQ_FRAGS (65536 / PAGE_SIZE + 2)
#define NF_TSO_MAXBURST ((IP_MAXPACKET / PAGE_SIZE) * MCLBYTES)
#define RX_COPY_THRESHOLD 256
@ -2122,6 +2123,7 @@ create_netdev(device_t dev)
ifp->if_hwassist = XN_CSUM_FEATURES;
ifp->if_capabilities = IFCAP_HWCSUM;
ifp->if_hw_tsomax = NF_TSO_MAXBURST;
ether_ifattach(ifp, np->mac);
callout_init(&np->xn_stat_ch, CALLOUT_MPSAFE);