Date: Sat, 14 May 2016 23:45:16 +0000 (UTC) From: Adrian Chadd <adrian@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r299797 - head/sys/dev/bwn Message-ID: <201605142345.u4ENjGGA091035@repo.freebsd.org>
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Author: adrian Date: Sat May 14 23:45:16 2016 New Revision: 299797 URL: https://svnweb.freebsd.org/changeset/base/299797 Log: [bwn] disable writing slottime timing out to improve performance. this is from b43 linux, there's a comment in there which notes one nic family suffers performance degredation with this being set. Modified: head/sys/dev/bwn/if_bwn.c Modified: head/sys/dev/bwn/if_bwn.c ============================================================================== --- head/sys/dev/bwn/if_bwn.c Sat May 14 23:44:30 2016 (r299796) +++ head/sys/dev/bwn/if_bwn.c Sat May 14 23:45:16 2016 (r299797) @@ -6381,10 +6381,15 @@ static void bwn_set_slot_time(struct bwn_mac *mac, uint16_t time) { + /* XXX should exit if 5GHz band .. */ if (mac->mac_phy.type != BWN_PHYTYPE_G) return; + BWN_WRITE_2(mac, 0x684, 510 + time); + /* Disabled in Linux b43, can adversely effect performance */ +#if 0 bwn_shm_write_2(mac, BWN_SHARED, 0x0010, time); +#endif } static struct bwn_dma_ring *
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