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API docs for intel_check_memory()

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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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Chris Wilson 2014-06-10 14:29:00 +01:00
parent 0617b0b3b8
commit 210d20f413
1 changed files with 21 additions and 0 deletions
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21
lib/intel_os.c
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@ -185,6 +185,27 @@ intel_get_total_swap_mb(void)
return retval / (1024*1024);
}
/**
* intel_check_memory:
* @count: number of surfaces that will be created
* @size: the size in bytes of each surface
* @mode: a bitfield declaring whether the test will be run in RAM or in SWAP
*
* Computes the total amount of memory required to allocate @count surfaces,
* each of @size bytes, and includes an estimate for kernel overhead. It then
* queries the kernel for the avilable amount of memory on the system (either
* RAM and/or SWAP depending upon @mode) and determines whether there is
* sufficient to run the test.
*
* Most tests should check that there is enough RAM to hold their working set.
* The rare swap thrashing tests should check that there is enough RAM + SWAP
* for their tests. oom-killer tests should only run if this reports that
* there is not enought RAM + SWAP!
*
* Returns:
* Whether the estimated amount of memory required for the objects
* fits in the available memory on the system.
*/
bool intel_check_memory(uint32_t count, uint32_t size, unsigned mode)
{
/* rough estimate of how many bytes the kernel requires to track each object */