lmbench context switch regression

From: Nick Piggin
Date: Wed Nov 05 2003 - 07:29:37 EST


Hi,
I'm seeing quite a large context switch speed regression as reported
by lmbench when I patched from test9 to test9-mm2.

The obvious thing I can see from the patch is the PF_DEAD finish_task_switch
change. I don't have time to investigate further tonight though.

lmbench two 0 sized processes context switch times go from around 1.80us to
2.60us on my PIII 650 (UP).

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/