[PATCH 0/2] Better handling of slow remote transfers

[Gary Benson]

Pedro Alves wrote:
> Hey, that was a quick and dirty patch.  :-)

I know, no worries :)

> Here's a cleaned up version.  WDYT?
[snip
> This patch almost halves the time it takes to "target remote + run
> to main" on a higher-latency connection.
> 
> E.g., I've got a ping time of ~85ms to an x86-64 machine on the gcc
> compile farm (almost 2000km away from me), and I'm behind a ~16Mbit
> ADSL.  When I connect to a gdbserver debugging itself on that machine
> and run to main, it takes almost 55 seconds:
[snip]
>  real    0m54.803s
>  user    0m0.329s
>  sys     0m0.064s
> 
> While the readahead cache added by this patch, it drops to:
> 
>  real    0m29.462s
>  user    0m0.454s
>  sys     0m0.054s
> 
> I added a few counters to show cache hit/miss, and got:
> 
>  readahead cache miss 142
>  readahead cache hit 310
> 
> Tested on x86_64 Fedora 20.

Very nice, please commit!

Thanks,
Gary

-- 
http://gbenson.net/