Re: [patch 2.6.13-rc3a] i386: inline restore_fpu

[Kenneth Parrish <Kenneth.Parrish@family-bbs.org>]

-=> Kenneth Parrish wrote to All <=-

 KP>  2.6.13-rc3-git5 lags -git4 on nbench's bitfield test, a part of its
 KP> memory index, eg typical runs
 KP> -git5
 KP> BITFIELD            :      1.1589e+07  :       1.99  :       0.42
 KP> -git4
 KP> BITFIELD            :      2.1892e+07  :       3.76  :       0.78

 KP> lmbench has slower context switch numbers for -git5.

i've been experimentally adding -funswitch-loops and -fpeel loops to the
default -march=i586 in the ../arch/i386/Makefile

cflags-$(CONFIG_M586)       += -march=i586 -funswitch-loops -fpeel-loops

based on some tests with gcc 3.4.3,4 and the cyrix mii cpu, but
with v2.6.13-rc3-git5 carelessly put these flags on the next,
cflags-$(CONFIG_M586TSC) line, and so they would not have been used.
i shall retest after recompiling to confirm.
[..]
yeah, a couple nbench runs show similar overall results as -git4
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/