Currently, the libertas main thread contends with the spi driver thread in the TX path. To improve throughput, ensure that the driver thread has higher scheduling priority than the libertas main thread. Do this by making the libertas spi driver thread a low priority real time thread. We measured an average throughput improvement of 13%. Signed-off-by: Anna Neal <anna@xxxxxxxxxxx> Signed-off-by: Andrey Yurovsky <andrey@xxxxxxxxxxx> --- drivers/net/wireless/libertas/if_spi.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/net/wireless/libertas/if_spi.c b/drivers/net/wireless/libertas/if_spi.c index 07311e7..97493e2 100644 --- a/drivers/net/wireless/libertas/if_spi.c +++ b/drivers/net/wireless/libertas/if_spi.c @@ -1020,6 +1020,7 @@ static int __devinit if_spi_probe(struct spi_device *spi) struct libertas_spi_platform_data *pdata = spi->dev.platform_data; int err = 0; u32 scratch; + struct sched_param param = { .sched_priority = 1 }; lbs_deb_enter(LBS_DEB_SPI); @@ -1123,6 +1124,9 @@ static int __devinit if_spi_probe(struct spi_device *spi) lbs_pr_err("error creating SPI thread: err=%d\n", err); goto remove_card; } + if (sched_setscheduler(card->spi_thread, SCHED_FIFO, ¶m)) + lbs_pr_err("Error setting scheduler, using default.\n"); + err = request_irq(spi->irq, if_spi_host_interrupt, IRQF_TRIGGER_FALLING, "libertas_spi", card); if (err) { -- 1.5.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html