Amber Lin 5cb0798d6a Replace lock file with shared memory ...

Performance counters have limited slots for concurrent profiling. We
need a mechanism to synchronize the slots access across different
processes. Lock file file was first used for this access control. It
reveals a RedHat bug that /var/lock, symbolic linked to /run/lock, is
not writable by others. To avoid this bug and to simplify the code,
POSIX shared memory is created to replace the lock file usage. Access
of the shared memory is controlled by semaphores.

Change-Id: I1e13c17f0e042fdfe6657afe8b3c88db7e84d292
Signed-off-by: Amber Lin <Amber.Lin@amd.com>


[ROCm/ROCR-Runtime commit: ac468f676c]

2017-07-06 13:48:34 -04:00

projects/rocr-runtime

Replace lock file with shared memory

2017-07-06 13:48:34 -04:00

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