a0d8e807d9
This commit adds a signal-based trigger to the Rx burst function in order to avoid unnecessary system calls while Rx queues are empty. Triggered Rx bursts put less pressure on the kernel, free up CPU resources for applications and result in a noticeable performance improvement when sharing CPU threads with other PMDs. Measuring the traffic forwarding rate between two physical devices in testpmd (IO mode, single thread, 64B packets) before and after adding two tap PMD instances (4 ports total) that do not process any traffic and comparing results yields: Without Rx trigger: -15% (--burst=32) -62% (--burst=1) With Rx trigger: -0.3% (--burst=32) -6% (--burst=1) Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com> Acked-by: Pascal Mazon <pascal.mazon@6wind.com> Acked-by: Keith Wiles <keith.wiles@intel.com> |
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| Makefile | ||
| rte_eth_tap.c | ||
| rte_pmd_tap_version.map | ||