svn commit: r289616 - head/sys/dev/ntb/if_ntb
Conrad E. Meyer
cem at FreeBSD.org
Tue Oct 20 01:54:45 UTC 2015
Author: cem
Date: Tue Oct 20 01:54:43 2015
New Revision: 289616
URL: https://svnweb.freebsd.org/changeset/base/289616
Log:
NTB: MFV 9891417d: Increase transport MTU to 64k from 16k
Benchmarking showed a significant performance increase with the MTU size
to 64k instead of 16k. Change the driver default to 64k.
Authored by: Dave Jiang
Obtained from: Linux (Dual BSD/GPL driver)
Sponsored by: EMC / Isilon Storage Division
Modified:
head/sys/dev/ntb/if_ntb/if_ntb.c
Modified: head/sys/dev/ntb/if_ntb/if_ntb.c
==============================================================================
--- head/sys/dev/ntb/if_ntb/if_ntb.c Tue Oct 20 01:54:34 2015 (r289615)
+++ head/sys/dev/ntb/if_ntb/if_ntb.c Tue Oct 20 01:54:43 2015 (r289616)
@@ -90,7 +90,7 @@ enum ntb_link_event {
NTB_LINK_UP,
};
-static unsigned int transport_mtu = 0x4000 + ETHER_HDR_LEN + ETHER_CRC_LEN;
+static unsigned int transport_mtu = 0x10000 + ETHER_HDR_LEN + ETHER_CRC_LEN;
static uint64_t max_mw_size;
SYSCTL_UQUAD(_hw_ntb, OID_AUTO, max_mw_size, CTLFLAG_RDTUN, &max_mw_size, 0,
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