> > I suppose I could allocate 32 more bytes to hold the pbuf struct and > > fudge the pointers to make the payload start on the right boundary, > > but you've said that pbuf_header could move the start of payload, or > > something like that... More voodoo stuff. > > And that is something I need, too: using a different alignment > constraint for pbufs (16 bytes) than for the rest (4 bytes). I might > have to add that to 1.4.1 so we can use a clean version in our products
Hi, I need 32 bytes alignement on Blackfin for L1 cache and even 128 bytes on C674x for L2 cache. I just add this in my cc.h: // PBUF_POOL needs to be aligned to cache line size #ifndef __cplusplus extern u8_t memp_memory_PBUF_POOL_base[] __attribute__ ((aligned (32))); #endif And in my lwipopts.h: #define PBUF_POOL_BUFSIZE 1520 // + sizeof(pbuf) = 1536 = 48 cache lines But I agree it could be easier with something like: #define PBUF_ALIGNMENT 32 -- Stephane _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
