How to prevent /proc/<pid>/status from running slow on AIX ?
volker.simonis at gmail.com
Fri Jul 17 18:34:45 UTC 2015
Yes, reading /proc/<pid>/status twice in a row will report exactly the
same (inaccurate) value.
It really seems that the update interval of /proc/<pid>/status on AIX
is much to coarse compared to other Unix implementations.
On Thu, Jul 16, 2015 at 10:27 PM, Dean Long <dean.long at oracle.com> wrote:
> If you read /proc/<pid>/status twice in a row, does the value increase or
> stay the same? I found the following that implies it's not being updated
> between reads:
> If that's the case then the accuracy would be limited by how often an
> internal snapshot is done for procfs.
> Being off by a clock tick sounds reasonable, but being off by 1 second? not
> so reasonable.
> On 7/15/2015 7:23 AM, Volker Simonis wrote:
>> Hi AIX experts,
>> do you have any idea how to prevent /proc/<pid>/status from running
>> slow on AIX (compared to times() and getrusage())?
>> Please have a look at the attached program which describes and
>> demonstrates the problem in full detail.
>> I'd need a workaround for this problem for the AIX port of the new
>> ProcessHandle implementation which came as part of JEP 102.
>> Thank you and best regards,
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