[lkml]   [2019]   [May]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRE: [PATCH] hv_sock: perf: loop in send() to maximize bandwidth
> From: Sunil Muthuswamy <>
> Sent: Thursday, May 16, 2019 7:05 PM
> Currently, the hv_sock send() iterates once over the buffer, puts data into
> the VMBUS channel and returns. It doesn't maximize on the case when there
> is a simultaneous reader draining data from the channel. In such a case,
> the send() can maximize the bandwidth (and consequently minimize the cpu
> cycles) by iterating until the channel is found to be full.
> ...
> Observation:
> 1. The avg throughput doesn't really change much with this change for this
> scenario. This is most probably because the bottleneck on throughput is
> somewhere else.
> 2. The average system (or kernel) cpu time goes down by 10%+ with this
> change, for the same amount of data transfer.
> Signed-off-by: Sunil Muthuswamy <>

Reviewed-by: Dexuan Cui <>

The patch looks good. Thanks, Sunil!

-- Dexuan

 \ /
  Last update: 2019-05-19 21:31    [W:0.033 / U:0.012 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site