Title: Memory Slab APIs
Description:
This test verifies that the kernel memory slab APIs operate as expected.
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Building and Running Project:
This microkernel project outputs to the console. It can be built and executed
on QEMU as follows:
make run
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Troubleshooting:
Problems caused by out-dated project information can be addressed by
issuing one of the following commands then rebuilding the project:
make clean # discard results of previous builds
# but keep existing configuration info
or
make pristine # discard results of previous builds
# and restore pre-defined configuration info
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Sample Output:
tc_start() - Test Kernel memory slabs
Starts RegressionTask
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(1) - Allocate and free 2 blocks in <RegressionTask>
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Function testSlabGetAllBlocks
MAP_LgBlks used 0 blocks
k_mem_slab_alloc OK, p[0] = 0x00104e00
MAP_LgBlks used 1 blocks
k_mem_slab_alloc OK, p[1] = 0x00104a00
MAP_LgBlks used 2 blocks
k_mem_slab_alloc RC_FAIL expected as all (2) blocks are used.
===================================================================
printPointers: p[0] = 0x00104e00, p[1] = 0x00104a00,
===================================================================
Function testSlabFreeAllBlocks
MAP_LgBlks used 2 blocks
block ptr to free p[0] = 0x00104e00
MAP_LgBlks freed 1 block
MAP_LgBlks used 1 blocks
block ptr to free p[1] = 0x00104a00
MAP_LgBlks freed 2 block
MAP_LgBlks used 0 blocks
===================================================================
Starts HelperTask
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(2) - Allocate 2 blocks in <HelperTask>
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Function testSlabGetAllBlocks
MAP_LgBlks used 0 blocks
k_mem_slab_alloc OK, p[0] = 0x00104a00
MAP_LgBlks used 1 blocks
k_mem_slab_alloc OK, p[1] = 0x00104e00
MAP_LgBlks used 2 blocks
k_mem_slab_alloc RC_FAIL expected as all (2) blocks are used.
===================================================================
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(3) - Further allocation results in timeout in <RegressionTask>
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RegressionTask: k_mem_slab_alloc times out which is expected
RegressionTask: start to wait for block
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(4) - Free a block in <HelperTask> to unblock the other task from alloc timeout
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HelperTask: About to free a memory block
RegressionTask: k_mem_slab_alloc OK, block allocated at 0x00104a00
RegressionTask: start to wait for block
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(5) <HelperTask> freeing the next block
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HelperTask: About to free another memory block
RegressionTask: k_mem_slab_alloc OK, block allocated at 0x00104e00
HelperTask: freed all blocks allocated by this task
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PASS - HelperTask.
RegressionTask: Used 2 block
RegressionTask: 1 block freed, used 1 block
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PASS - RegressionTask.
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PROJECT EXECUTION SUCCESSFUL
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