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From: <ebi...@ln...> - 2003-08-03 18:07:28
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Markus Gutschke <ma...@gu...> writes: > Eric W. Biederman wrote: > > A couple of interesting things to find out are: > > 1) How much does it increase the size of a rom? > > A quick inspection of the object files suggests that selecting > DOWNLOAD_PROTO_HTTP increases the image size by about 2kB. Then it looks like it is probably useable. The network drivers are increasing faster than that. > > 2) How well does it the tcp stack work in a congested environment. > > - Does it play badly with other simultaneous tcp connections? > > - Does the implemented window scaling work well. > > I don't have much in the form of test environments. Hopefully, somebody else can > > take a stab at testing the code in more real-life situations. Some of that can be done by simple inspection and theoretical calculation. Testing helps two of course. But I know I put in all of the exponential back off code into etherboot based on pure inspection. > > 3) Are alignment considerations that need to be taken care of. > > ??? Can you elaborate what you were thinking of? Compilers on non-x86 assume there certain kinds of data are aligned to certain boundaries. 4 bytes for a 32bit int for example. Network packets have a tendency to misalign structures. For running the code on the Itanium for example it is very important that we don't have that kind of issue. Eric |
