[dpdk-dev] [PATCH] eal: add umonitor umwait to x86 cpuflags

[Ananyev, Konstantin]

> 
> umonitor/umwait are user-level versions of the monitor/mwait
> instructions. These allow the core to wait in a low-power state
> until a specified cache line is accessed, a timeout occurs,
> or the core is interrupted.

Isn't it a duplicate to:
https://patches.dpdk.org/patch/76554/
?

> 
> Signed-off-by: Timothy McDaniel <timothy.mcdaniel at intel.com>
> ---
>  lib/librte_eal/x86/include/rte_cpuflags.h | 1 +
>  lib/librte_eal/x86/rte_cpuflags.c         | 1 +
>  2 files changed, 2 insertions(+)
> 
> diff --git a/lib/librte_eal/x86/include/rte_cpuflags.h b/lib/librte_eal/x86/include/rte_cpuflags.h
> index c1d2036..ab2c3b3 100644
> --- a/lib/librte_eal/x86/include/rte_cpuflags.h
> +++ b/lib/librte_eal/x86/include/rte_cpuflags.h
> @@ -130,6 +130,7 @@ enum rte_cpu_flag_t {
>  	RTE_CPUFLAG_CLDEMOTE,               /**< Cache Line Demote */
>  	RTE_CPUFLAG_MOVDIRI,                /**< Direct Store Instructions */
>  	RTE_CPUFLAG_MOVDIR64B,              /**< Direct Store Instructions 64B */
> +	RTE_CPUFLAG_UMWAIT,                 /**< UMONITOR/UMWAIT */
>  	RTE_CPUFLAG_AVX512VP2INTERSECT,     /**< AVX512 Two Register Intersection */
> 
>  	/* The last item */
> diff --git a/lib/librte_eal/x86/rte_cpuflags.c b/lib/librte_eal/x86/rte_cpuflags.c
> index 30439e7..6bed3eb 100644
> --- a/lib/librte_eal/x86/rte_cpuflags.c
> +++ b/lib/librte_eal/x86/rte_cpuflags.c
> @@ -137,6 +137,7 @@ const struct feature_entry rte_cpu_feature_table[] = {
>  	FEAT_DEF(CLDEMOTE, 0x00000007, 0, RTE_REG_ECX, 25)
>  	FEAT_DEF(MOVDIRI, 0x00000007, 0, RTE_REG_ECX, 27)
>  	FEAT_DEF(MOVDIR64B, 0x00000007, 0, RTE_REG_ECX, 28)
> +	FEAT_DEF(UMWAIT, 0x00000007, 0, RTE_REG_ECX, 5)
>  	FEAT_DEF(AVX512VP2INTERSECT, 0x00000007, 0, RTE_REG_EDX, 8)
>  };
> 
> --
> 2.6.4