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WICED Studio Wi-Fi Combo

ClMa_3563786
New Contributor II

Hello,

I have a question about dynamoc memory usage for HTTP/HTTPS.

I'm using FreeRTOS and LwIP stack.

I am connected to an HTTPS server. I notice almost 40KB of memory is allocated in runtime as follow:

http_client_init() : ~10KB

http_client_connect : ~10KB

Defragmented buffer: ~16KB

I'm looking for advices on defines or configuration that might be tweaked for reduce this memory allocation ?

Thanks for your recommandations

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4 Replies
PriyaM_16
Moderator
Moderator

By dynamic memory, I am assuming you are pointing to the heap size. I tried to monitor the allocated and free heap(using mallinfo provided in WICED) for httpbin_org application and the results are as below:

Before WICED init:

-----------------------------------------------------------------------

sbrk heap size:    1708520

sbrk current free: 1695736

malloc allocated:     9264

malloc free:          3520

total free memory: 1699256

-----------------------------------------------------------------------

Starting WICED vWiced_006.000.001.0005

Platform CYW943907AEVAL1F initialised

Started FreeRTOS v9.0.0

Initialising LwIP v2.0.2

DHCP CLIENT hostname WICED IP

WWD interface initializing with US/0

WLAN MAC Address : 44:91:60:28:5C:2A

WLAN Firmware    : wl0: Nov 24 2017 00:13:08 version 7.15.168.102 (r677543) FWID 01-c41dd43a

WLAN CLM         : API: 12.2 Data: 9.10.74 Compiler: 1.31.3 ClmImport: 1.36.3 Creation: 2017-11-24 00:08:47

Init took ~180 ms

Joining : riya123

Successfully joined : riya123

Setting IPv6 link-local address

Obtaining IPv4 address via DHCP

IPv6 Network ready IP: FE80::4691:60FF:FE28:5C2A

IPv4 Network ready IP: 192.168.43.209

Resolving IP address of www.httpbin.org

www.httpbin.org is at 52.4.95.48

Connecting to www.httpbin.org

Connected

At the end of application:

-----------------------------------------------------------------------

sbrk heap size:    1708520

sbrk current free: 1650680

malloc allocated:    50224

malloc free:          7616

total free memory: 1658296

-----------------------------------------------------------------------

AxLi_1746341
Honored Contributor

riya wrote:

Before WICED init:

-----------------------------------------------------------------------

sbrk heap size:    1708520

sbrk current free: 1695736

malloc allocated:     9264

malloc free:          3520

total free memory: 1699256

-----------------------------------------------------------------------

At the end of application:

-----------------------------------------------------------------------

sbrk heap size:    1708520

sbrk current free: 1650680

malloc allocated:    50224

malloc free:          7616

total free memory: 1658296

-----------------------------------------------------------------------

Can you explain a bit about above numbers?

By checking total free memory:

1699256 - 1658296 = 40960

So you lost about 40KB memory at the end of application? Isn't it a leak?

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ClMa_3563786
New Contributor II

OK, we have the same numbers.


Do you know any way to reduce this amount of memory used?

Any defines to tweak ?

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PriyaM_16
Moderator
Moderator

Hello,

You may try to reduce the memory footprint by removing the libraries that your application doesn't require. Please have a look at these threads which address a similar issue: