Date: Tue, 20 Oct 2015 01:54:43 +0000 (UTC) From: "Conrad E. Meyer" <cem@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r289616 - head/sys/dev/ntb/if_ntb Message-ID: <201510200154.t9K1shVZ031121@repo.freebsd.org>
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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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