Why is IOCTL_CDROM_READ_TOC so slow?
Eric Pouech
eric.pouech at wanadoo.fr
Thu Jan 30 13:49:00 CST 2003
Waldeck Schutzer wrote:
> Hi Eric,
>
> It is very strange indeed, but I just tested it again and I'm convinced
> that on my system that call can take a few seconds. I'm also pretty sure
> there is no concurrent access to the drive and automount is not running.
> I even did this on a failsafe session just to be sure, but still the
> same thing.
maybe you could try it with a simple C program:
1/ open fd
2/ do the read toc ioctl
3/ close
time the operation 2/
> I wonder there is something wrong with my kernel (2.4.18),
> or worse, with my computer. On the other hand, it works pretty fast on
> Windows.
rather strange... I reran on my computer win98 cdplayer, and
everything's ok.
I wonder if the CD ROM driver in Linux is not to blame then
A+
--
Eric Pouech
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