1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

FX-8350 Piledriver Tuning On AMD's Open64 Compiler

Michael Larabel

Published on 24 October 2012
Written by Michael Larabel
Page 1 of 4 - 1 Comment

With this week's unveiling of the FX-8350 eight-core processor being based on AMD's new Piledriver architecture, in this article are benchmarks when testing out the Piledriver "bdver2" optimizations within AMD's own Open64 compiler.

Back in August was when AMD released the AMD Open64 4.5.2 compiler, which introduced support for Family 15h Piledriver cores. With the Piledriver support came work within AMD's Open64 compiler fork for handling AVX, XOP, FMA3, FMA4, BMI, TBM, and F16C instruction sets.

From the features list for the Open64 4.5.2 release, "You can enable this new instructions in Piledriver core using the -march=bdver2. Alternately you can pick and choose the ISA to be enabled using -mfma (for FMA3), -mfma4, -mbmi, -mtbm flags." The "bdver2" target is the same as is used by GCC and LLVM/Clang for supporting the second-generation Bulldozer -- a.k.a. Piledriver -- AMD processors.

Earlier this month I did do some GCC compiler tuning tests for the Piledriver-based AMD A10-5800K Trinity APU. With the GCC testing of comparing the bdver2 micro-architecture support against bdver1 and other earlier AMD CPU targets, there wasn't much improvement out of using "-march=bdver2" when compiling the test application / benchmark binaries.

In the GCC Piledriver tuning tests from last week with GCC 4.7.2 I went over what the bdver2 target adds: BMI, TBM, F16C, and FMA3. FMA3 is a three operand variant (that's being pushed by Intel with Haswell) of Fused Multiply-Add rather than the four operand version, F16C allows for converting and storing 32-bit floating point values using 16-bits, TBM is Trailing Bit Manipulation, and BMI is Bit Manipulation Instructions.

From the AMD FX-8350 Eight-Core "Vishera" setup running Ubuntu 12.10 with the Linux 3.5 kernel, AMD's official 64-bit Open64 4.5.2 compiler was tested. Each time this compiler built the Phoronix Test Suite collection of tests while passing each time a different "-march=" value of k8, barcelona, bdver1, and then bdver2.

<< Previous Page
1
Latest Linux Hardware Reviews
  1. 13-Way Low-End GPU Comparison With AMD's AM1 Athlon
  2. ASUS AM1I-A: A Mini-ITX Board For Socketed Kabini APUs
  3. Mini-Box M350: A Simple, Affordable Mini-ITX Case
  4. Overclocking The AMD AM1 Athlon & Sempron APUs
Latest Linux Articles
  1. Ubuntu 12.04.4 vs. 13.10 vs. 14.04 LTS Desktop Benchmarks
  2. AMD OpenCL Performance With AM1 Kabini APUs
  3. A Quick Look At GCC 4.9 vs. LLVM Clang 3.5
  4. Are AMD Athlon/Sempron APUs Fast Enough For Steam On Linux?
Latest Linux News
  1. Mesa 10.0 & 10.1 Stable Get Updated
  2. Getting Hit By The Variable Performance Of The Public Cloud
  3. Git 2.0 Test Releases Begin With Many Changes
  4. Wine 1.7.17 Works On Its Task Scheduler, C Run-Time
  5. The Improv ARM Board Still Isn't Shipping; Riding A Dead Horse?
  6. Debian To Maintain 6.0 Squeeze As An LTS Release
  7. Wasteland 2 Is Finally Released For Linux Gamers
  8. FreeBSD Advances For ARM, Bhyve, Clang
  9. Ubuntu 14.04 LTS "Trusty Tahr" Officially Released
  10. Ubuntu 12.04 LTS vs. 14.04 LTS Server Benchmarks
  11. QEMU 2.0 Released With ARM, x86 Enhancements
  12. Running The Unity 8 Preview Session On Ubuntu 14.04 LTS
Latest Forum Discussions
  1. Suggestions about how to make a Radeon HD 7790 work decently?
  2. The GNOME Foundation Is Running Short On Money
  3. Updated and Optimized Ubuntu Free Graphics Drivers
  4. Radeon 8000M problematic on Linux?
  5. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  6. After Jack Keane, RuseSoft will briing Ankh 3 to Linux through Desura
  7. Suspected PHP Proxy Issue
  8. Change installation destination from home directory