Hi, I've crippled a Raspberry Pi 3 (1 core, 200 MHz) and observed that the glomming feature has a definite impact on TX performance, but it looks like at this CPU frequency, the work queue is solicited "too often" by brcmf_sdio_trigger_dpc() and glomming is only doing 4 packets at once, resulting in maybe a sub-optimal throughput. I have a vague idea that deliberately delaying the transmissions so as to wait for either a small timeout, or the glomming level has been reached, would be something worth exploring. But I haven't spent a long time looking at the driver. I'm just soliciting your advice at this point, I'll do some experiments also. Best regards, -- Jérôme