Stephen Hemminger writes:
> On Thu, 2002-10-31 at 15:10, Mikael Pettersson wrote:
> > This is part 4 of 4 of perfctr-3.1 for the 2.5.45 kernel:
> > kernel changes to integrate the low and high-level drivers.
...
>
> Rather than adding yet another system call, shouldn't this be done by
> extending the cpu part of sysfs (or /proc)?
Why?
ptrace() is a system call
fork() is a system call
write() is a system call
other arch's performance counter interfaces are system calls
...
> It looks like the operations in sys_vperfctr could be easily mapped to a
> RAM based file system. As it stands it reminds me of one of the old DEC
> graphic libraries with one API entry for all the operations, and 65
> different flag values.
There are about half a dozen operations, not 65. I could use 6 system calls,
no problem, but as long as Linus is silent about this I have no reason to
change it speculatively in random directions.
/Mikael
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This archive was generated by hypermail 2b29 : Thu Nov 07 2002 - 22:00:33 EST