-=> 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
-
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