Re: [dpdk-dev] [PATCH] lib: include rte_memory.h for __rte_cache_aligned

[Jia Yu <jyu@vmware.com>]

Thanks for reviewing this change.

No error message was found without this patch. This patch follows a good
coding practice to include the header files when it¹s needed, rather than
through some other header files. In the past, we found some data structure
was not cache line aligned due to missing the include, and caused memory
corruption. Compiler did not give warning or error when
__rte_cache_aligned attribute definition is missing. With DPDK latest, I
checked the data structures that used __rte_cache_aligned attributed in
these files, and they are properly aligned. So this patch is mainly for
better coding style now.

pahole -s libfile.[o, a]

ip_frag_pkt	192	1
ip_frag_tbl_stat	64	0
malloc_elem	64	0
rte_mbuf	128	1
rte_table_lpm	1088	1
rte_table_hash	64	1

Thanks,
Jia



On 11/10/14, 1:46 AM, "Thomas Monjalon" <thomas.monjalon@6wind.com> wrote:

>2014-11-07 09:28, Jia Yu:
>> Include rte_memory.h for lib files that use __rte_cache_aligned
>> attribute.
>
>Please could you explain what was the error?
>As I suspect it's a fix, it would be clearer to start your title with
>"fix".
>
>Thanks
>-- 
>Thomas