[dpdk-dev] [PATCH] metrics: make number of metrics names configurable

[Bruce Richardson]

On Thu, Jul 02, 2020 at 10:28:52AM -0700, Stephen Hemminger wrote:
> The maximum number of metrics is hardcoded at 256.
> This severely limits the usefulness of the library.
> It should be configurable like other limits in DPDK.
> 
> Fixes: 349950ddb9c5 ("metrics: add information metrics library")
> Cc: remy.horton at intel.com
> Cc: ciara.power at intel.com
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
> ---
>  config/common_base               | 1 +
>  config/meson.build               | 2 +-
>  lib/librte_metrics/rte_metrics.h | 1 -
>  3 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/config/common_base b/config/common_base
> index fe30c515e5a3..f0212faec80c 100644
> --- a/config/common_base
> +++ b/config/common_base
> @@ -917,6 +917,7 @@ CONFIG_RTE_LIBRTE_JOBSTATS=y
>  # Compile the device metrics library
>  #
>  CONFIG_RTE_LIBRTE_METRICS=y
> +CONFIG_RTE_METRICS_MAX_METRICS=256
>  
>  #
>  # Compile the bitrate statistics library
> diff --git a/config/meson.build b/config/meson.build
> index 351e268c1f5b..cc8cb8fbf2f0 100644
> --- a/config/meson.build
> +++ b/config/meson.build
> @@ -238,7 +238,7 @@ dpdk_conf.set('RTE_ENABLE_TRACE_FP', get_option('enable_trace_fp'))
>  dpdk_conf.set('RTE_MAX_VFIO_GROUPS', 64)
>  dpdk_conf.set('RTE_DRIVER_MEMPOOL_BUCKET_SIZE_KB', 64)
>  dpdk_conf.set('RTE_LIBRTE_DPAA2_USE_PHYS_IOVA', true)
> -
> +dpdk_conf.set('RTE_METRICS_MAX_METRICS', 256)
>  

The meson.build file should really just be used for computed values, I
think. For build-time constants like this it's probably better put in
config/rte_config.h file.

Regards,
/Bruce