Forums

Profiling in CCS

Started by #JONATHAN SANITO# February 18, 2003
Hi,

I am using CCS 2.0, to program on C6711 DSK. I'm trying to profile my code. But
the funny thing I got different results for different execution. Is this normal?
I actually set to profile functions that don't have any communication with my
host pc. ie no printf/fread and such. only performing computation in the DSK
board. but still the results seems to be varies within execution.

anyone got an idea?

Thanks,

Jonathan




Hi,

what do you mean by external memory? you mean the SDRAM of my DSK?
what's the cause of this ya, got idea? I believe if there is only 1 program
loaded to my DSK, the measurement should have been the same right?

regards,

Jonathan

-----Original Message-----
From: [mailto:]
Sent: Tue 2/18/2003 9:37 PM
To: #JONATHAN SANITO#
Cc:
Subject: Re: [c6x] Profiling in CCS
Hi.. :-)
This can happen when u access code or data from external memory...
check that out..

:o)
regards,
Vishal.
"#JONATHAN SANITO#" <> on 02/18/2003 12:25:17 PM

To:
cc: (bcc: Vishal Goel/HSS)

Subject: [c6x] Profiling in CCS

Hi,

I am using CCS 2.0, to program on C6711 DSK. I'm trying to profile my code. But

the funny thing I got different results for different execution. Is this
normal?
I actually set to profile functions that don't have any communication with my
host pc. ie no printf/fread and such. only performing computation in the DSK
board. but still the results seems to be varies within execution.

anyone got an idea?

Thanks,

Jonathan _____________________________________
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Hi,

I got your point. Thanks, but i think very hard to fit in everything to IDRM
hehehe.

nonetheless your 'theory' must have been correct.

regards,

-----Original Message-----
From: [mailto:]
Sent: Tue 2/18/2003 9:51 PM
To: #JONATHAN SANITO#
Cc:
Subject: RE: [c6x] Profiling in CCS
Hi again :-)

well... by ext. memory, I meant the same..SDRAM etc. only.. And you must be
knowing that ext. memory access is preceded by 'Wait cycles',
which may vary because of cache... .......
This was what i surmised when i also used SDRAM with cache enabled on EVM 6201.

and got different values of profiling all the time.
Well... i know i dont sound very rational... but I told myself this thing to my

own satisfaction. :-)

And in fact , when i moved my data into IDRM ( internal data memory), profiling

figures became consistant.

Good Luck,
And I hope if you get correct answer, it'll be made available on C6x group.
:-)

Regards,

Vishal.
"#JONATHAN SANITO#" <> on 02/18/2003 07:18:38 PM

To: Vishal Goel/HSS@HSS
cc:

Subject: RE: [c6x] Profiling in CCS

Hi,

what do you mean by external memory? you mean the SDRAM of my DSK?
what's the cause of this ya, got idea? I believe if there is only 1 program
loaded to my DSK, the measurement should have been the same right?

regards,

Jonathan

-----Original Message-----
From: [mailto:]
Sent: Tue 2/18/2003 9:37 PM
To: #JONATHAN SANITO#
Cc:
Subject: Re: [c6x] Profiling in CCS
Hi.. :-)
This can happen when u access code or data from external memory...
check that out..

:o)
regards,
Vishal.
"#JONATHAN SANITO#" <> on 02/18/2003 12:25:17 PM

To:
cc: (bcc: Vishal Goel/HSS)

Subject: [c6x] Profiling in CCS

Hi,

I am using CCS 2.0, to program on C6711 DSK. I'm trying to profile my
code.
But
the funny thing I got different results for different execution. Is this
normal?
I actually set to profile functions that don't have any communication with

my
host pc. ie no printf/fread and such. only performing computation in the
DSK
board. but still the results seems to be varies within execution.

anyone got an idea?

Thanks,

Jonathan _____________________________________
Note: If you do a simple "reply" with your email client, only the author
of
this
message will receive your answer. You need to do a "reply all" if you
want
your
answer to be distributed to the entire group.

_____________________________________
About this discussion group:

To Join: Send an email to

To Post: Send an email to

To Leave: Send an email to

Archives: http://www.yahoogroups.com/group/c6x

Other Groups: http://www.dsprelated.com ">http://docs.yahoo.com/info/terms/


Hi, I need help in clearing some doubts about
performing profiling in CCS ver 2.1.

I have a C6201 fixed point DSP chip. It has the
following specifications:
Cycle time (ns) : 5
MIPS : 1600

I have a function in my program that need to be
completed by 2msec. THis is what I have done:

1) In the profiler tab, clock setup:
Count = CPU cycles
Instruction Cycle Time (ns) = 40
Pipeline Adjustment cycle = 0

2) Run Profile

3) After Profiling I got a value x

4) I calculate the max insrruction cycle that can be
allow as follow: __________________________________________________


Hi, I need help in clearing some doubts about
performing profiling in CCS ver 2.1.

I have a C6201 fixed point DSP chip. It has the
following specifications:
Cycle time (ns) : 5
MIPS : 1600

I have a function in my program that need to be
completed by 2msec. THis is what I have done:

1) In the profiler tab, clock setup:
Count = CPU cycles
Instruction Cycle Time (ns) = 40
Pipeline Adjustment cycle = 0

2) Run Profile

3) After Profiling I got a value x

4) I calculate the max insrruction cycle that can be
allow as follow:
max instruction cycle time = 200Mhz X 2msec =
400000

5) If x is less than 400000, my function is able to
complete in 2msec

Is my way of doing profiling correct? Is my way of
intepreting the result correct?

regard
Chee Wei __________________________________________________