Ingo Molnar wrote:
* Andi Kleen <[email protected]> wrote:
a new CPU is added. If the TSC isnt sync on SMP then it quickly gets
pretty messy, and we should rather take a look at /why/ these apps are
using RDTSC.
Ingo
-
I use RDTSC in get a cheap method of measuring time. What other choices are
there for a low overhead high frequency time source?
By low overhead a kernel call is way to expensive, I want to minimally impact
the code and have many of these calls through out the code. One of the
ways I use it is to instrument multi-threaded applications and then use
the TSC to compare when actions occur between threads. i.e. I use it as a
time stamp counter and neither precision or accuracy is too important.
On the other hand the more precise and accurate the better:)
Cheers,
Wink Saville
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
