topic Re: Trying the throughput test with the host_msd_fatfs_frdmk22f_mqx_frdmk22f in MQX Software Solutions

Trying the throughput test with the host_msd_fatfs_frdmk22f_mqx_frdmk22f

davepfaltzgraff — Wed, 28 Jan 2015 18:58:04 GMT

When I set THROUGHPUT_TEST_ENABLE to (1) and build, I get linker errors:

- section `.bss' will not fit in region `m_data'

- region `m_data' overflowed by 9900 bytes

Is there an easy fix?

Thanks

Re: Trying the throughput test with the host_msd_fatfs_frdmk22f_mqx_frdmk22f

soledad — Wed, 28 Jan 2015 21:43:17 GMT

Hello David,

Are you using KDS??

If you want to test throughput, you should set THROUGHPUT_TEST_ENABLE as (1) in file mfs_usb.h for mqx, file msd_diskio.h for sdk.

For MQX, please add the below line in the mfs_usb.h file and recompile the library.

#define

THROUGHPUT_TEST_ENABLE (1)

Have a great day,
Sol

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Re: Trying the throughput test with the host_msd_fatfs_frdmk22f_mqx_frdmk22f

davepfaltzgraff — Wed, 28 Jan 2015 22:40:36 GMT

Hi Soledad,

Yes, I should have mentioned that I'm working in KDS. As it turns out, I was trying to do this with just the SDK so that the adapter_cfg.h had

#define OS_ADAPTER_ACTIVE_OS OS_ADAPTER_SDK

In msd_diskio.h I had changed THROUGHPUT_TEST_ENABLE to (1) as you suggested. It was under those conditions that I got the linker error message. SO, that was my original question.

When I go back to adapter_cfg.h and change the OP_ADAPTER_ACTIVE_OS to OS_ADAPTER_MQX, I get a different error that will requires separate investigation.

It appears to be more complex...

Re: Trying the throughput test with the host_msd_fatfs_frdmk22f_mqx_frdmk22f

DavidS — Wed, 28 Jan 2015 23:16:18 GMT

Hi David,

Short answer is the K22F is running out of available SRAM for the image generated when THROUGHPUT_TEST_ENABLE is (1).

I tried this test on the frdm-k64f and it too generated the error.

When I modified the linker file to:

/* Uninitialized data section */

.bss :

{

/* This is used by the startup in order to initialize the .bss section */

. = ALIGN(4);

__START_BSS = .;

__bss_start__ = .;

*(.bss)

*(.bss*)

*(COMMON)

. = ALIGN(4);

__bss_end__ = .;

__END_BSS = .;

} > m_data_2 <--THIS WAS m_data

It compiled and ran with following results (again on frdm-k64f):

USB file system test

Waiting for USB mass storage to be attached...

----- Attach Event -----

State = 0 Interface Number = 0 Alternate Setting = 0 Class = 8 SubClass = 6 Protocol = 80

Mass Storage Device Attached

----- Interface opened Event -----

vol 0 mount success

******************************************************************************

* vol 0 file.dat for write and read speed *

******************************************************************************

***************************1 write 100M test**********************************

write test results: time = 190248ms speed = 538K/s

***************************1 read 100M test***********************************

read test results: time = 165232ms speed = 619K/s

***************************2 write 100M test**********************************

write test results: time = 189899ms speed = 539K/s

***************************2 read 100M test***********************************

read test results: time = 165233ms speed = 619K/s

******************************************************************************

* vol 0 TEST DONE *

******************************************************************************

I'll have to ask around if this test is "just too big" for K22.

FYI - I did try compiling for "Release" target but still image was too big.

Regards,

David

Re: Trying the throughput test with the host_msd_fatfs_frdmk22f_mqx_frdmk22f

davepfaltzgraff — Thu, 29 Jan 2015 01:40:03 GMT

Hi Dave,

I tried the change you suggested, but it simply returned that there was not room in m_data_2. The heap and stack are assigned to m_data_2. Since the total area is 64K, I'd think there should be some way around this.

I looked at the code to run the test and noted that there are two large arrays, raw_size_arr[] and test_buffer[] that would cause this. Since I only need about 10K, how would I "tell" the compiler linker that one of these variables should be allocated to m_data_2 instead of the default .bss (m_data)?

Thanks.

Re: Trying the throughput test with the host_msd_fatfs_frdmk22f_mqx_frdmk22f

davepfaltzgraff — Thu, 29 Jan 2015 16:36:04 GMT

By changing the value of EACH_TRANSFER_SECTORS from 128 down to 64, I reduced the size of the 'test_buffer' to the point where it would fit in the .bss section. This allowed me to run the test and get the following output:

====

USB file system test

Waiting for USB mass storage to be attached...

----- Attach Event -----

State = 0 Interface Number = 0 Alternate Setting = 0 Class = 8 SubClass = 6

Protocol = 80

Mass Storage Device Attached

----- Interface opened Event -----

vol 0 mount success

******************************************************************************

* vol 0 file.dat for write and read speed *

******************************************************************************

***************************1 write 100M test**********************************

write test results: time = 170894ms speed = 599K/s

***************************1 read 100M test***********************************

read test results: time = 166586ms speed = 614K/s

***************************2 write 100M test**********************************

write test results: time = 171861ms speed = 595K/s

***************************2 read 100M test***********************************

read test results: time = 166754ms speed = 614K/s

******************************************************************************

* vol 0 TEST DONE *

******************************************************************************

====

Not too shabby!

Re: Trying the throughput test with the host_msd_fatfs_frdmk22f_mqx_frdmk22f

DavidS — Thu, 29 Jan 2015 16:42:49 GMT

Hi David,

That is awesome.

Thank you for sharing your solution for frdm-k22f.

I will be sure to pass along to our KSDK team.

Regards,

David