[dpdk-dev] [RFC v2] sched: parameterize QoS traffic-classes and queues

[Stephen Hemminger]

On Fri, 16 Feb 2018 15:44:13 +0000
alangordondewar at gmail.com wrote:

> -	qindex = tc_index * 4;
> -
> -	pipe->wrr_tokens[qindex] = (grinder->wrr_tokens[0] & grinder->wrr_mask[0])
> -		>> RTE_SCHED_WRR_SHIFT;  
> -	pipe->wrr_tokens[qindex + 1] = (grinder->wrr_tokens[1] & grinder->wrr_mask[1])
> -		>> RTE_SCHED_WRR_SHIFT;  
> -	pipe->wrr_tokens[qindex + 2] = (grinder->wrr_tokens[2] & grinder->wrr_mask[2])
> -		>> RTE_SCHED_WRR_SHIFT;  
> -	pipe->wrr_tokens[qindex + 3] = (grinder->wrr_tokens[3] & grinder->wrr_mask[3])
> -		>> RTE_SCHED_WRR_SHIFT;  
> +	uint32_t q;
> +	uint8_t tokens;
> +
> +	qindex = tc_index * RTE_SCHED_QUEUES_PER_TRAFFIC_CLASS;
> +	for (q = 0; q < RTE_SCHED_QUEUES_PER_TRAFFIC_CLASS; q++) {
> +		tokens = (grinder->wrr_tokens[q] & grinder->wrr_mask[q]) >>
> +			RTE_SCHED_WRR_SHIFT;
> +		pipe->wrr_tokens[qindex + q] = tokens;

You could use #pragma to tell compiler to unroll the loop which would make it
as fast as the original.