On Fri, 6 Dec 2019 at 22:54, O'Connor, Daniel wrote:
>
> With respect to the man page, I find it difficult to know what a given value
> for each sysctl will do, as evidenced by my confusion above about IBRS.
scottl recently moved these sysctls to machdep.mitigations in r355436,
but they've kept
> On 7 Dec 2019, at 00:52, Konstantin Belousov wrote:
>
> On Fri, Dec 06, 2019 at 03:51:04PM +1030, O'Connor, Daniel wrote:
>> Hi,
>> I am trying to track down a performance drop with the ASPEED xorg video
>> driver between FreeBSD 11 and 12 (I'm not expecting miracles from it but it
>> was
On Fri, 06 Dec 2019 06:21:04 +0100, O'Connor, Daniel
wrote:
vm.pmap.pti="0"# Disable page table isolation
hw.ibrs_disable="1"# Disable Indirect Branch Restricted Speculation
hw.mds_disable="0" # Disable Microarchitectural Data Sampling flush
hw.vmm.vmx="1" # Don't
On Fri, Dec 06, 2019 at 03:51:04PM +1030, O'Connor, Daniel wrote:
> Hi,
> I am trying to track down a performance drop with the ASPEED xorg video
> driver between FreeBSD 11 and 12 (I'm not expecting miracles from it but it
> was basically unusable..)
>
> I wondered if some of the speculative
Hi,
I am trying to track down a performance drop with the ASPEED xorg video driver
between FreeBSD 11 and 12 (I'm not expecting miracles from it but it was
basically unusable..)
I wondered if some of the speculative execution mitigations could be causing
the problem so I did some digging and
