From: Tymoteusz Kielan Date: Thu, 4 May 2017 12:14:22 +0000 (-0700) Subject: IB/hfi1: Adjust default eager_buffer_size to 8MB X-Git-Tag: v4.14-rc1~960^3~12 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9746fa439c63893195c7f285728617ab874b8bbd;p=platform%2Fkernel%2Flinux-rpi.git IB/hfi1: Adjust default eager_buffer_size to 8MB Performance analysis shows benefits for PSM2 in increasing eager buffer size from 2MB to 8MB. The change has neutral impact on verbs. Make change to the module parameter's default value. Allocation ring down was verified to work with the larger buffer size. Reviewed-by: Tadeusz Struk Reviewed-by: Mike Marciniszyn Reviewed-by: Dennis Dalessandro Signed-off-by: Tymoteusz Kielan Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford --- diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c index 71b0204..c573f06 100644 --- a/drivers/infiniband/hw/hfi1/init.c +++ b/drivers/infiniband/hw/hfi1/init.c @@ -102,9 +102,9 @@ static unsigned hfi1_rcvarr_split = 25; module_param_named(rcvarr_split, hfi1_rcvarr_split, uint, S_IRUGO); MODULE_PARM_DESC(rcvarr_split, "Percent of context's RcvArray entries used for Eager buffers"); -static uint eager_buffer_size = (2 << 20); /* 2MB */ +static uint eager_buffer_size = (8 << 20); /* 8MB */ module_param(eager_buffer_size, uint, S_IRUGO); -MODULE_PARM_DESC(eager_buffer_size, "Size of the eager buffers, default: 2MB"); +MODULE_PARM_DESC(eager_buffer_size, "Size of the eager buffers, default: 8MB"); static uint rcvhdrcnt = 2048; /* 2x the max eager buffer count */ module_param_named(rcvhdrcnt, rcvhdrcnt, uint, S_IRUGO);