Why didn't mali864 perform better than mali764?

Why didn't mali864 perform better than mali764?

hello, I encountered a problem recently:

In EGL_BUFFER_PRESERVED model, under exactly the same hardware condition(CPU, memory, GPU frequency..), it appeared that mali864 only showed half the performance compared with mali764.

for mali864 I used android 6.0.1 in 64bit and the GPU driver version is r12p0-04rel0;

for mali764 I used android 4.4.2 in 32bit and the GPU driver version is r4p1-02dev0;

so, here are the questions:

1.what may be the reason why this happen?

2.would a newer GPU driver help?

3.what can I do to fix this?

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  • Hi Yueliu,

    I'm not aware of any specific known issues in this regard.

    Mali-T860 may make a different memory access pattern to Mali-T760 when accessing data resources, which may place increased pressure on system components such as a System MMU in situations where the System MMU TLB is close to thrashing.

    If you are a Mali licensee please raise a support request via support@arm.com and our support team will follow up (it's likely we'll need some data off your platform to be able to help more).

    Cheers,
    Pete

Reply
  • Hi Yueliu,

    I'm not aware of any specific known issues in this regard.

    Mali-T860 may make a different memory access pattern to Mali-T760 when accessing data resources, which may place increased pressure on system components such as a System MMU in situations where the System MMU TLB is close to thrashing.

    If you are a Mali licensee please raise a support request via support@arm.com and our support team will follow up (it's likely we'll need some data off your platform to be able to help more).

    Cheers,
    Pete

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