Array-Size

[Thiago Macieira]

staneker at gris.uni-tuebingen.de wrote:
>Hi!
>
>Today I tried to pass an array from my server as reply
>message to my client. But the problem is, that I can only
>transfer arrays with a maximum size of 112844 bytes. Is
>there any restriction in the size of an array in a message?

Yes, there is. It's 2^26, so much larger than what you're seeing.

I've just created a simple test-case that sends 256k of data and it works 
just fine.

However, something weird shows up on strace:
[129 reads]
writev(8, [{"l\1\0\1\4\0\4\0\5\0\0\0\206\0\0\0\1\1o\0\21\0\0\0/org/"..., 
152}, {"\0\0\4\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\1\1\1\1\1\1"..., 
262148}], 2) = 113568
[129 reads]
writev(9, [{"l\2\1\1\4\0\4\0\6\0\0\0.\0\0\0\6\1s\0\5\0\0\0:1.22\0\0"..., 
64}, {"\0\0\4\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\1\1\1\1\1\1"..., 
262148}], 2) = 113568

Despite the return value, all 256kB were transferred, and that is 
confirmed by the number of reads.

-- 
Thiago José Macieira - thiago.macieira AT trolltech.com
Trolltech AS - Sandakerveien 116, NO-0402 Oslo, Norway
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 191 bytes
Desc: not available
Url : http://lists.freedesktop.org/archives/dbus/attachments/20060403/3ed3a38a/attachment.pgp