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| From: | Paolo Bonzini |
| Subject: | Re: [Qemu-devel] [PATCH] target-arm: Use common CPU cycle infrastructure |
| Date: | Tue, 6 Oct 2015 14:58:20 +0200 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
On 06/10/2015 14:49, Peter Maydell wrote: > Yeah, there's no guarantee on userspace access. I think the > fastest way to get some kind of count is to use a library > function that boils down to gettimeofday(2), which we will > do purely in userspace in the kernel VDSO if possible. Could we just use CNTVCT_EL0? Which cores have it? Paolo
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