GCC 8.0 vs. Clang 6.0 AMD EPYC Tuning Comparison

Tests for a future article on Phoronix.

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Audio Encoding 2 Tests
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GCC 8.0: -march=x86-64
January 02 2018
 
GCC 8.0: -march=znver1
January 02 2018
 
Clang 6.0: -march=x86-64
January 02 2018
 
Clang 6.0: -march=znver1
January 01 2018
 
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10:40:11", "data": { "compiler-configuration": "--disable-multilib --enable-checking=release", "disk-scheduler": "NONE", "disk-mount-options": "data=ordered,errors=remount-ro,relatime,rw" } }, "GCC 8.0: -march=znver1": { "identifier": "GCC 8.0: -march=znver1", "hardware": { "Processor": "AMD EPYC 7601 32-Core @ 2.20GHz (64 Cores)", "Motherboard": "TYAN B8026T70AE24HR", "Chipset": "AMD Device 1450", "Memory": "126976MB", "Disk": "280GB INTEL SSDPE21D280GA", "Graphics": "ASPEED ASPEED Family", "Monitor": "VE228", "Network": "Broadcom Limited NetXtreme BCM5720 Gigabit PCIe" }, "software": { "OS": "Ubuntu 17.10", "Kernel": "4.13.0-21-generic (x86_64)", "Desktop": "GNOME Shell 3.26.1", "Display Driver": "modesetting 1.19.5", "OpenCL": "OpenCL 1.2 pocl 1.0 LLVM 5.0.0", "Compiler": "GCC 8.0.0 20171231 + clang (GCC) 8.0.0 20171231 (experimental) + LLVM 5.0.0", "File-System": "ext4", "Screen Resolution": "1920x1080", "System Layer": "vm-other Xen 4.9.0 Hypervisor" }, "user": "phoronix", 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