lkml.org 
[lkml]   [2006]   [Dec]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] [DISCUSS] Optimizing linux applications with the help of the kernel.
On 12/10/06, Amit Choudhary <amit2030@yahoo.com> wrote:
> Hi All,
>
> I just had an idea for improving the performance of linux applications with some help from the
> kernel. Let's say that I have to make a copy of a file. So, I read the input file into a buffer
> and then write the buffer to the output file.
>
> In both these cases the same data is coming from kernel_to_user and then from user_to_kernel. If
> this can be short-circuited, that is, from kernel_to_kernel then the performance can be increased
> a lot.
>
> The psuedocode would be:
>
> fd_inp = open _output_file
> fd_out = open _input_file
> instruct_kernel to write next data read from fd_inp to fd_out
> read fd_out
>
>
I think you are describing the splice syscall:

see http://lwn.net/Articles/178199/

regards,

Benoit
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-12-10 12:15    [W:0.046 / U:2.560 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site