On 3/25/15 7:24 AM, Arnaldo Carvalho de Melo wrote:
So it starts when there are tons of threads in the system, for which
synthezing from /proc will have to take place, without looking again at
that patch, I can't think about what would be a problem :-\
3 extra lines are read from /proc/pid/status:
Name: bash
State: S (sleeping)
Tgid: 6046
< current patch breaks here>
Ngid: 0
Pid: 6046
PPid: 6045
< my patch reads these 3 lines, repeats the memcmp and does an atoi on
the PPid: value >
Let me remove that loop by reading in 4k at a time and making a single
pass. That should bring down the overhead, but filling in the ppid will
add some.
David
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