On 4/18/2018 4:30 PM, Pavan Nikhilesh wrote:
> Add macro to mark a variable to be mostly read only and place it in a
> separate section.
>
> Signed-off-by: Pavan Nikhilesh <pbhagavat...@caviumnetworks.com>
> ---
>
> Group together mostly read only data to avoid cacheline bouncing, also
> useful for auditing purposes.
>
> lib/librte_eal/common/include/rte_common.h | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/lib/librte_eal/common/include/rte_common.h
> b/lib/librte_eal/common/include/rte_common.h
> index 6c5bc5a76..f2ff2e9e6 100644
> --- a/lib/librte_eal/common/include/rte_common.h
> +++ b/lib/librte_eal/common/include/rte_common.h
> @@ -114,6 +114,11 @@ static void __attribute__((constructor(prio), used))
> func(void)
> */
> #define __rte_noinline __attribute__((noinline))
>
> +/**
> + * Mark a variable to be mostly read only and place it in a separate section.
> + */
> +#define __rte_read_mostly __attribute__((__section__(".read_mostly")))
Hi Pavan,
Is the section ".read_mostly" treated specially [1] or is this just for grouping
symbols together (to reduce cacheline bouncing)?
[1]
If this is special section, can you please point counter part in the kernel?
> +
> /*********** Macros for pointer arithmetic ********/
>
> /**
> --
> 2.17.0
>
