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Re: [Qemu-trivial] [Qemu-devel] [PATCH] tcg: optimise memory layout of T
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From: |
Stefan Weil |
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Subject: |
Re: [Qemu-trivial] [Qemu-devel] [PATCH] tcg: optimise memory layout of TCGTemp |
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Date: |
Mon, 30 Mar 2015 07:43:45 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.5.0 |
Am 29.03.2015 um 23:52 schrieb Richard Henderson:
No decrease in boot time is good. We /know/ we're saving memory, after all.
Well, I would not mind a decrease in boot time, too.
The more it decreases, the better. :-)
To be honest: in my version I only used 1 bit bitfield entries for
boolean values, but 8 bit values (aligned on byte boundaries)
for other values because as far as I know, most (all?) cpu
architectures will need more time to extract some bits from
a machine word than to extract a byte.
I have no idea whether this makes a difference in performance
as I did not run any runtime benchmark.
Stefan