Author: wma Date: Fri Apr 8 11:20:56 2016 New Revision: 297707 URL: https://svnweb.freebsd.org/changeset/base/297707
Log: Speedup BGX link polling on ARM64 The previous values caused the callout thread stall for 100ms each 2s if no link is present. Dtrace analysis showed that it has significant impact on overall interrupt performance. Decrease these values by a factor of 100. Obtained from: Semihalf Sponsored by: Cavium Reviewed by: zbb Differential Revision: https://reviews.freebsd.org/D5854 Modified: head/sys/dev/vnic/thunder_bgx.c Modified: head/sys/dev/vnic/thunder_bgx.c ============================================================================== --- head/sys/dev/vnic/thunder_bgx.c Fri Apr 8 11:15:26 2016 (r297706) +++ head/sys/dev/vnic/thunder_bgx.c Fri Apr 8 11:20:56 2016 (r297707) @@ -240,7 +240,7 @@ static int bgx_poll_reg(struct bgx *bgx, uint8_t lmac, uint64_t reg, uint64_t mask, boolean_t zero) { - int timeout = 100; + int timeout = 10; uint64_t reg_val; while (timeout) { @@ -250,7 +250,7 @@ bgx_poll_reg(struct bgx *bgx, uint8_t lm if (!zero && (reg_val & mask)) return (0); - DELAY(1000); + DELAY(100); timeout--; } return (ETIMEDOUT); _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
