Re: Re: C3600 kernel/64bit 4.* slow IO due to -mlong-calls
On Fri, Mar 16, 2018 at 4:25 AM, Helge Deller <deller@gmx.de> wrote:
>> >> kernel gcc binutils with mlong without mlong
>> >> 4.15.7 4.9.3 2.25.1 13.4 MB/s 27.0 MB/s
>> >> 4.15.7 6.4.0 2.25.1 13.4 MB/s 27.0 MB/s
>> >> 4.15.7 6.4.0 2.29.1 14.4 MB/s 25.0 MB/s
>> > Interesting bad results!
>> >
>> It's hard to understand why the performance would deteriorate so much
>> but I see essentially the same behavior.
>
> Speaking of debian kernel, it's nearly impossible to link a kernel without mlong-calls.
This week I succeeded in building a stripped-down kernel without
mlong-calls (in Gentoo), but was unable to get anything to link
without mlong-calls when CONFIG_PARISC_PAGE_SIZE_16KB=y.
With mlong-calls, I couldn't get a 16K page-size kernel to boot
either. Is this a configuration anyone uses or tests? 16K pages are
supposed to give better performance, so it'd be good if they worked.
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