Messages in this thread | | | Date | Sun, 29 Mar 1998 14:29:51 +0200 (CEST) | From | Marek Habersack <> | Subject | Re: GGI Project Unhappy On Linux |
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On Sun, 29 Mar 1998, Chris Evans wrote:
> > abitration. The problem is there is a penalty for that. A syscall costs time > > and you have to really get the syscall count down to sane levels. A fast > > graphics card can plot a line in less time than a syscall takes, so it > > is a real hard issue > > Initially if we just aimed for mode switching in the kernel, maybe. Mode > switching is very infrequent, and certainly not time critical. No-one is > going to notice the extra overhead of an ioctl(). > > But yes if accel requests get handled by the kernel we need to coalesce > requests in userspace and transfer multiple commands to kernel space per > syscall. Just as it is done in Win32 - you can batch the GDI commands and then flush them when you're done.
TTYL(r), marek --- "Little prigs and three-quarter madmen may have the conceit that the laws of nature are constantly broken for their sakes." Friedrich Nietzsche
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