am335x VS C674X benchmark

justin wang1

Other Parts Discussed in Thread: AM3352

TI WIKI show the following performance comparison information
CYCLES C674X=363 AM335X=18857

http://processors.wiki.ti.com/index.php/AM335x_Resource_Guide(English/中文)#.5B.E5.B8.B8.E8.A7.81.E9.97.AE.E9.A2.98.5D_FAQs

1.How to calculate the execution time of the algorithm ??
1/1GHz(cycle) * 18857??

2. Is this starterware testing results?

3. Is there other Benchmark for FFT, or other DSP operations?

4.Why is this formula different with general FIR? (43+10*Nr*Nh/16)

FIR should be like

http://stackoverflow.com/questions/14997850/fir-filter-implementation-in-c-programming

over 10 years ago

0 Biser Gatchev-XID over 10 years ago

TI__Guru**** 393215 points

Hi,

I cannot say where this information has come from on the Chinese support page. You can ask on the Chinese support site: http://www.deyisupport.com/ You can find the Linux kernel benchmarks here: http://processors.wiki.ti.com/index.php/Processor_SDK_Linux_Kernel_Performance_Guide

0 Biser Gatchev-XID over 10 years ago in reply to Biser Gatchev-XID

TI__Guru**** 393215 points

Here are a few wiki pages you may find useful:

http://processors.wiki.ti.com/index.php/Cortex-A8

http://processors.wiki.ti.com/index.php/ARM_Multimedia_Users_Guide

http://processors.wiki.ti.com/index.php/StarterWare_NeonVFP

http://processors.wiki.ti.com/index.php/StarterWare_NeonVFP_Benchmark

0 justin wang1 over 10 years ago in reply to Biser Gatchev-XID

Expert 1085 points

I use Linux SDK 6.0 Application to Running a single-precision floating-point code, and compare with C674X and C55X

The measured data as follows

C550x (300MHz): 14.2ms

C674x (300MHz): 1.14ms

AM3352 (1000MHz): 378us

1. is the Neon enabled in default linux SDK 6.0?
2. How to enable and disable the Neon in SDK6.0?

0 Yordan Kovachev over 10 years ago in reply to justin wang1

TI__Guru**** 161600 points

Hi Justin,

1. Not sure what is the default configuration in SDK6.0

You can check whether NEON instruction support is enabled by following the steps bellow:

x0155517@mms:~/ti-sdk-am335x-evm-08.00.00.00$ export ARCH=arm
x0155517@mms:~/ti-sdk-am335x-evm-08.00.00.00$ export PATH=$PATH:/home/x0155517/ti-sdk-am335x-evm-08.00.00.00/linux-devkit/sysroots/i686-arago-linux/usr/bin/
x0155517@mms:~/ti-sdk-am335x-evm-08.00.00.00$ export CROSS_COMPILE=arm-linux-gnueabihf-
x0155517@mms:~/ti-sdk-am335x-evm-08.00.00.00$ cd board-support/linux-3.14.26-g2489c02/
x0155517@mms:~/ti-sdk-am335x-evm-08.00.00.00/board-support/linux-3.14.26-g2489c02$ make clean

x0155517@mms:~/ti-sdk-am335x-evm-08.00.00.00/board-support/linux-3.14.26-g2489c02$ make omap2plus_defconfig
HOSTCC scripts/basic/fixdep
HOSTCC scripts/kconfig/conf.o
HOSTCC scripts/kconfig/zconf.tab.o
HOSTLD scripts/kconfig/conf
#
# configuration written to .config
#
x0155517@mms:~/ti-sdk-am335x-evm-08.00.00.00/board-support/linux-3.14.26-g2489c02$ gedit .config &

And see if there is CONFIG_NEON=y in your .config file. If the line is present then NEON is enabled by default in your kernel.

2. You can enable disable NEON instructions in your kernel by:
2.1 Add/remove CONFIG_NEON=y in your defconfig file.

2.2 Use make menuconfig.

Hope this helps.

Best Regards,

Yordan

0 justin wang1 over 10 years ago in reply to Yordan Kovachev

Expert 1085 points

Yordan , Thank You!

my .config file as follwing
CONFIG_VFP=y
CONFIG_VFPv3=y
CONFIG_NEON=y

Does the single-precision floating-point operations use Neon or VFP??

0 Yordan Kovachev over 10 years ago in reply to justin wang1

TI__Guru**** 161600 points

They use NEON. You can enable them also with make menuconfig-> Floating point emulation --> Support for NEON in kernel mode.

But have in mind that there may be dependencies between NEON & VFP, so it is better to enable them both in defconfig (as is in the .config).

Best Regards,
Yordan

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am335x VS C674X benchmark