Arm Community
Site
Search
User
Site
Search
User
Groups
Arm Research
DesignStart
Education Hub
Graphics and Gaming
High Performance Computing
Innovation
Multimedia
Open Source Software and Platforms
Physical
Processors
Security
System
Software Tools
TrustZone for Armv8-M
中文社区
Blog
Announcements
Artificial Intelligence
Automotive
Healthcare
HPC
Infrastructure
Innovation
Internet of Things
Machine Learning
Mobile
Smart Homes
Wearables
Forums
All developer forums
IP Product forums
Tool & Software forums
Support
Open a support case
Documentation
Downloads
Training
Arm Approved program
Arm Design Reviews
Community Help
More
Cancel
Developer Community
Tools and Software
Software Tools
Jump...
Cancel
Software Tools
Arm Development Studio forum
Slow performance on samsung S3C6410
Tools, Software and IDEs blog
Forums
Videos & Files
Help
Jump...
Cancel
New
Replies
8 replies
Subscribers
126 subscribers
Views
2932 views
Users
0 members are here
Related
Slow performance on samsung S3C6410
Offline
Marcin Jędrzejewski
over 7 years ago
Note: This was originally posted on 18th January 2011 at http://forums.arm.com
Hi,
I'am a software developer and I am trying to port our product to new device. This is Windows CE 6 device with S3C6410 (ARM1176JZF-S) CPU. The problem is that Q-Bench benchmarks show that this is very fast system but after executing our application it is actually very slow.
I have spend a lot of time profiling various parts of our product, but it shows nothing. Finally what I have found out is that the problem is with the huge code amount. Actually our .exe is ~10MB in size. I have made tests in which I have auto generated huge amounts of code (~200,000 lines of c++ code, VS2005 compiled), and now executing this exe (~1.5MB) on this device shows significant slow down, 8 - 10 times comparing it to other devices (with slower CPUs). This auto generated code does nothing with data, it just executes lots of functions which just increment some variables.
My question is what is the source of problem? From What I know this CPU has 16 KiB instruction cache. Can it be somehow badly configured? I actually have no contact with this device manufacturer. I can only give some hints to its reseler to maybe push information further.
some more info:
Q-Bench Pro - shows that Cache Line == 8, while on other devices it is 32
CeGetCacheInfo - gives below results:
dwL1Flags=0
dwL1ICacheSize=16384
dwL1ICacheLineSize=32
dwL1ICacheNumWays=4
dwL1DCacheSize=16384
dwL1DCacheLineSize=32
dwL1DCacheNumWays=4
dwL2Flags=0
dwL2ICacheSize=0
dwL2ICacheLineSize=0
dwL2ICacheNumWays=0
dwL2DCacheSize=0
dwL2DCacheLineSize=0
dwL2DCacheNumWays=0
Thank You for any help
Martin
Parents
Offline
Jerry Fan
over 7 years ago
Note: This was originally posted on 1st December 2011 at
http://forums.arm.com
TCM memory is much faster than main memory, such as SDRAM, it is kind of L2 cache. The instruction TCM definitively improve the CPU's performance. So, please enable it and run your program again.
BTW, what the size of instruction TCM on this chip?
Anyway, a lot code optimization can be done to increase the instruction cache hit rate.
HTH.
B.R
Jerry
Cancel
Up
0
Down
Reply
Cancel
Reply
Offline
Jerry Fan
over 7 years ago
Note: This was originally posted on 1st December 2011 at
http://forums.arm.com
TCM memory is much faster than main memory, such as SDRAM, it is kind of L2 cache. The instruction TCM definitively improve the CPU's performance. So, please enable it and run your program again.
BTW, what the size of instruction TCM on this chip?
Anyway, a lot code optimization can be done to increase the instruction cache hit rate.
HTH.
B.R
Jerry
Cancel
Up
0
Down
Reply
Cancel
Children
No data
More questions in this forum
By title
By date
By reply count
By view count
By most asked
By votes
By quality
Descending
Ascending
All recent questions
Unread questions
Questions you've participated in
Questions you've asked
Unanswered questions
Answered questions
Questions with suggested answers
Questions with no replies
Answered
How to view SFRs in DS during debugging?
+1
2878
views
1
reply
Latest
3 months ago
by
Ronan Synnott
Answered
Dual-core debugging in DS
0
5733
views
2
replies
Latest
3 months ago
by
Ivan Savvateev
Answered
DS52020.0 connection to Musca-A/B boards not working
+1
Arm Development Studio
Musca-A
7529
views
4
replies
Latest
3 months ago
by
Daniel Oliveira
Answered
Positioning a function in a Position Independent Executable for ARMV8
+1
8285
views
3
replies
Latest
4 months ago
by
Stephen Theobald
Answered
Link a pure binary file to image with scatter file
0
8248
views
3
replies
Latest
4 months ago
by
Ronan Synnott
<
>
View all questions in Arm Development Studio forum