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[salasidis]

Example of Destructive C string Send, using global declaration (or commented out malloc in heap) string.

Does not use SDRAM.

[khoih-prog]

Hi @salasidis

You're a step behind, sorry. I already update the examples.

Please check and test

1. Async_AdvancedWebServer_MemoryIssues_Send_CString where we can use #define to select either SDRAM or not, etc.
2. Async_AdvancedWebServer_MemoryIssues_SendArduinoString

---

Terminal Debug

Async_AdvancedWebServer_MemoryIssues_Send_CString ===> Using SDRAM, very small heap (12847)

Using SDRAM

Start Async_AdvancedWebServer_MemoryIssues_Send_CString using SDRAM on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Portenta_H7_AsyncTCP v1.4.0
Portenta_H7_AsyncWebServer v1.4.0
Using mac index = 2
Connected! IP address: 192.168.2.123
HTTP EthernetWebServer is @ IP : 192.168.2.123

HEAP DATA - Pre Create Arduino String  Cur heap: 8458  Res Size: 451648  Max heap: 8472
.
HEAP DATA - Pre Send  Cur heap: 9634  Res Size: 451648  Max heap: 10196

HEAP DATA - Post Send  Cur heap: 9734  Res Size: 451648  Max heap: 12847
......... .......... .......... .......... .......... .......... .......... ..........
Out String Length=31200
.......... .......... .......... .......... .......... .......... .......... ..........
Out String Length=31219
.......... .......... .......... .......... .......... .......... .......... ..........
Out String Length=31255
.......... .......... .......... .......... .......... .......... .......... ..........
Out String Length=31198
.......... .......... .......... .......... .......... .......... .......... ........
HEAP DATA - Post Send  Cur heap: 11201  Res Size: 451648  Max heap: 14314
..
Out String Length=31224
.......... .......... .......... .......... .......... .......... .......... ..........
Out String Length=31235

Not using SDRAM ===> small heap (51823)

Start Async_AdvancedWebServer_MemoryIssues_Send_CString on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Portenta_H7_AsyncTCP v1.4.0
Portenta_H7_AsyncWebServer v1.4.0
Using mac index = 8
Connected! IP address: 192.168.2.123
HTTP EthernetWebServer is @ IP : 192.168.2.123

HEAP DATA - Pre Create Arduino String  Cur heap: 47434  Res Size: 451760  Max heap: 47448
.
HEAP DATA - Pre Send  Cur heap: 48610  Res Size: 451760  Max heap: 49172

HEAP DATA - Post Send  Cur heap: 48710  Res Size: 451760  Max heap: 51823
......... .......... .......... .......... .......... .......... .......... ..........
Out String Length=31200
.......... .......... .......... .......... .......... .......... .......... ..........
Out String Length=31291

===================================================================

Async_AdvancedWebServer_MemoryIssues_SendArduinoString ===> very large heap (111387)

Start Async_AdvancedWebServer_MemoryIssues_SendArduinoString on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Portenta_H7_AsyncTCP v1.4.0
Portenta_H7_AsyncWebServer v1.3.0
Using mac index = 0
Connected! IP address: 192.168.2.123
HTTP EthernetWebServer is @ IP : 192.168.2.123

HEAP DATA - Pre Create Arduino String  Cur heap: 7434  Res Size: 452016  Max heap: 7448
.
HEAP DATA - Pre Send  Cur heap: 48611  Res Size: 452016  Max heap: 48611

HEAP DATA - Post Send  Cur heap: 79009  Res Size: 452016  Max heap: 111347
.
HEAP DATA - Post Send  Cur heap: 79029  Res Size: 452016  Max heap: 111387
...
HEAP DATA - Post Send  Cur heap: 79037  Res Size: 452016  Max heap: 111403
....
HEAP DATA - Post Send  Cur heap: 79041  Res Size: 452016  Max heap: 111411
. ..
Out String Length=31247
.......
HEAP DATA - Post Send  Cur heap: 79047  Res Size: 452016  Max heap: 111423
. ....
Out String Length=31233
...... ......
Out String Length=31243
.... .......
Out String Length=31251
... .......
HEAP DATA - Post Send  Cur heap: 79054  Res Size: 452016  Max heap: 111437
..
Out String Length=31280
. ......

[salasidis]

Excellent.

[khoih-prog]

Closed as completed via #8