soc: fsl: dpio: Add prefetch instruction
In dpaa2_io_store_next(), if the current dequeue entry is not the last, prefetch the next one as most likely it will be requested shortly by the consumer driver. This brings a ~3% improvement for dpaa2 ethernet driver IP forwarding with small size frames. Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com> Signed-off-by: Li Yang <leoyang.li@nxp.com>
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@ -630,6 +630,7 @@ struct dpaa2_dq *dpaa2_io_store_next(struct dpaa2_io_store *s, int *is_last)
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if (!(dpaa2_dq_flags(ret) & DPAA2_DQ_STAT_VALIDFRAME))
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if (!(dpaa2_dq_flags(ret) & DPAA2_DQ_STAT_VALIDFRAME))
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ret = NULL;
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ret = NULL;
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} else {
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} else {
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prefetch(&s->vaddr[s->idx]);
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*is_last = 0;
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*is_last = 0;
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}
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}
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