Since we started doing direct submission to reduce the initial submission stall, we split the submit tasklet into two: one part that was wholly undercontrol of the tasklet, and the rest called from mixed contexts. For the latter, we required additional extra spinlocks and atomic handling to ensure concurrent operations, and worse, required those sequences to use irq-off. Instead of calling individual components of the submission process, we can just call the whole tasklet and so replace the individual locking with a known serialised calling context. That turns out to be far simpler, and reduces the irqoff time required for the tasklet, improving the parallelism of the hw. Slightly better latency, slightly higher throughput, and slightly lower impact on system latency. -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
