[arm][arm64] Disable COHERENT_CACHE support
This is an experiment to see if it affects crash rates on Nexus 9 devices. A small performance impact (3-4% on Octane) is expected. BUG=chromium:524337 LOG=n R=hablich@chromium.org Review URL: https://codereview.chromium.org/1808243002 Cr-Commit-Position: refs/heads/master@{#34896}
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@ -145,7 +145,10 @@ void CpuFeatures::ProbeImpl(bool cross_compile) {
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if (cpu.implementer() == base::CPU::NVIDIA &&
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cpu.variant() == base::CPU::NVIDIA_DENVER &&
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cpu.part() <= base::CPU::NVIDIA_DENVER_V10) {
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supported_ |= 1u << COHERENT_CACHE;
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// TODO(jkummerow): This is turned off as an experiment to see if it
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// affects crash rates. Keep an eye on crash reports and either remove
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// coherent cache support permanently, or re-enable it!
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// supported_ |= 1u << COHERENT_CACHE;
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}
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#endif
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@ -56,7 +56,10 @@ void CpuFeatures::ProbeImpl(bool cross_compile) {
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if (cpu.implementer() == base::CPU::NVIDIA &&
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cpu.variant() == base::CPU::NVIDIA_DENVER &&
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cpu.part() <= base::CPU::NVIDIA_DENVER_V10) {
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supported_ |= 1u << COHERENT_CACHE;
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// TODO(jkummerow): This is turned off as an experiment to see if it
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// affects crash rates. Keep an eye on crash reports and either remove
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// coherent cache support permanently, or re-enable it!
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// supported_ |= 1u << COHERENT_CACHE;
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}
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}
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