On Fri, 2013-09-06 at 13:12 -0400, Carlos O'Donell wrote:

> Are you able to post this test program for posterity along with
> your patches?

I have attached it to this email.  I compile with -UVERIFY when doing
benchmarks and with -DVERIFY when I am doing correctness testing.  On
one of my 74k boards the old memset took 63.409 seconds and the new one
took 45.577 seconds.  I played with different prefetch hints too while
benchmarking but the prepare-to-store one is the fastest.


> Just run `make bench', wait a while, and compare results before and after.
> 
> Look at bench/README for more details.

I tried running it but all the tests failed with messages like this:


Running /home/sellcey/gcc/memset/obj-mipsisa32r2el-linux-gnu/glibc/obj_default/benchtests/bench-bcopy
/home/sellcey/gcc/memset/obj-mipsisa32r2el-linux-gnu/glibc/obj_default/elf/ld.so.1: 1: /home/sellcey/gcc/memset/obj-mipsisa32r2el-linux-gnu/glibc/obj_default/elf/ld.so.1: ^?ELF^A^A^A^C^H^A�^O4~\�: not found
/home/sellcey/gcc/memset/obj-mipsisa32r2el-linux-gnu/glibc/obj_default/elf/ld.so.1: 2: /home/sellcey/gcc/memset/obj-mipsisa32r2el-linux-gnu/glibc/obj_default/elf/ld.so.1: Syntax error: "(" unexpected


I am not quite sure what to make of this, it seems to be using the right
ld.so.1 but I am not sure what it is that is 'not found'  Could this be
related to the issue of installing the latest libgcc and libstdc++ in
default locations? (glibc 2.18 wiki section 5.1.1)  I built glibc with a
GCC from a non-standard location so the libgcc and libstdc++ for that
compiler are not in the standard locations.

Steve Ellcey
sellcey@mips.com