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zhaoguo_w_
Beginner
105 Views

How can i disable haswell cache prefetcher?

I try to disable haswell cache prefetcher, but there is no options in the BIOS. I also try to use wrmsr command to set 0x1a0 register the bit 9 to be 1 to disable the cache prefetcher, but failed.

# rdmsr 0x1a0

850089

#wrmsr -p 0 0x1a0 0x850289

wrmsr: CPU 0 cannot set MSR 0x000001a0 to 0x0000000000850289

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3 Replies
Bernard
Black Belt
105 Views

Do you use Linux or Windows

Sometimes write/read operations on MSR registers are locked.I had similar issue with access to MSR 0x199.

105 Views

What flags (bits number) are you trying to change in MSR? 

Bernard
Black Belt
105 Views

I was using windbg to modify MSR registers.

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