dcbst instruction

Hi All,

I have a question about the PowerPC cache line clean dcbst instruction.
Is this instruction used at all in Linux ?
If used, where ? kernel ? libc ? special builds of user space applications ?

Thanks,
Rabeeh


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Rabeeh Khoury wrote:

Hi All,

I have a question about the PowerPC cache line clean dcbst instruction.
Is this instruction used at all in Linux ?
If used, where ? kernel ? libc ? special builds of user space
applications ?

It is used in glibc.  I have not seen off the shelf applications using
it, but I wouldn't be surprised if highly optimized apps did attempt to
use it.

As for the kernel, I would assume it's being used.. but a simple grep
should tell you if it is.

--Mark

Thanks,
Rabeeh

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

Rabeeh Khoury writes:

I have a question about the PowerPC cache line clean dcbst instruction.
Is this instruction used at all in Linux ?
If used, where ? kernel ? libc ? special builds of user space applications ?

It's used in the kernel and in every program that uses shared
libraries.  I would expect that applications such as Java JIT
compilers would use it too.

Paul.

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