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From: =?UTF-8?Q?Simon_K=c3=a5gstr=c3=b6m?= <simon.kagstrom@netinsight.net>
Subject: Unit for tx_rate in rte_eth_set_queue_rate_limit?
Date: Tue, 20 Oct 2015 14:20:38 +0200
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Hi!

What is the unit of the tx_rate parameter to the
rte_eth_set_queue_rate_limit function? It's documented as

/**
 * Set the rate limitation for a queue on an Ethernet device.
 *
 * @param port_id
 *   The port identifier of the Ethernet device.
 * @param queue_idx
 *   The queue id.
 * @param tx_rate
 *   The tx rate allocated from the total link speed for this queue.
 * @return
 *   - (0) if successful.
 *   - (-ENOTSUP) if hardware doesn't support this feature.
 *   - (-ENODEV) if *port_id* invalid.
 *   - (-EINVAL) if bad parameter.
 */
int rte_eth_set_queue_rate_limit(uint8_t port_id, uint16_t queue_idx,
			uint16_t tx_rate);

I parse this as meaning a percentage of total link speed, i.e., on a 10
Gbps link, 50 would mean 5Gbps, 10 means 1Gbps etc. Is this correct?

// Simon