zephyr/tests/benchmarks/sys_kernel
Andy Ross 317178b88f sys_clock: Fix unsafe tick count usage
The system tick count is a 64 bit quantity that gets updated from
interrupt context, meaning that it's dangerously non-atomic and has to
be locked.  The core kernel clock code did this right.

But the value was also exposed to the rest of the universe as a global
variable, and virtually nothing else was doing this correctly.  Even
in the timer ISRs themselves, the interrupts may be themselves
preempted (most of our architectures support nested interrupts) by
code that wants to set timeouts and inspect system uptime.

Define a z_tick_{get,set}() API, eliminate the old variable, and make
sure everyone uses the right mechanism.

Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
2018-10-16 15:03:10 -04:00
..
src sys_clock: Fix unsafe tick count usage 2018-10-16 15:03:10 -04:00
CMakeLists.txt cmake: Prepend 'cmake_minimum_required()' into 'app' build scripts 2018-08-15 04:06:50 -07:00
prj.conf benchmarks: sys_kernel: Disable userspace for benchmarks 2018-05-31 08:48:07 -04:00
README.txt doc: qemu target was deprecated, use 'run' 2017-08-03 11:48:55 -04:00
testcase.yaml tests: cleanup subsystem tests meta-data 2018-04-09 22:55:20 -04:00

Title: kernel Object Performance

Description:

The SysKernel test measures the performance of semaphore,
lifo, fifo and stack objects.

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Building and Running Project:

This 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:

MODULE: kernel API test
KERNEL VERSION: 0x1066300

Each test below is repeated 5000 times;
average time for one iteration is displayed.

TEST CASE: Semaphore #1
TEST COVERAGE:
        k_sem_init
        k_sem_take(K_FOREVER)
        k_sem_give
Starting test. Please wait...
TEST RESULT: SUCCESSFUL
DETAILS: Average time for 1 iteration: NNNN nSec
END TEST CASE

TEST CASE: Semaphore #2
TEST COVERAGE:
        k_sem_init
        k_sem_take(TICKS_NONE)
        k_yield
        k_sem_give
Starting test. Please wait...
TEST RESULT: SUCCESSFUL
DETAILS: Average time for 1 iteration: NNNN nSec
END TEST CASE

TEST CASE: Semaphore #3
TEST COVERAGE:
        k_sem_init
        k_sem_take(K_FOREVER)
        k_sem_give
        k_sem_give
        k_sem_take(K_FOREVER)
Starting test. Please wait...
TEST RESULT: SUCCESSFUL
DETAILS: Average time for 1 iteration: NNNN nSec
END TEST CASE

TEST CASE: LIFO #1
TEST COVERAGE:
        k_lifo_init
        k_lifo_get(K_FOREVER)
        k_lifo_put
Starting test. Please wait...
TEST RESULT: SUCCESSFUL
DETAILS: Average time for 1 iteration: NNNN nSec
END TEST CASE

TEST CASE: LIFO #2
TEST COVERAGE:
        k_lifo_init
        k_lifo_get(K_FOREVER)
        k_lifo_get(TICKS_NONE)
        k_lifo_put
        k_yield
Starting test. Please wait...
TEST RESULT: SUCCESSFUL
DETAILS: Average time for 1 iteration: NNNN nSec
END TEST CASE

TEST CASE: LIFO #3
TEST COVERAGE:
        k_lifo_init
        k_lifo_get(K_FOREVER)
        k_lifo_put
        k_lifo_get(K_FOREVER)
        k_lifo_put
Starting test. Please wait...
TEST RESULT: SUCCESSFUL
DETAILS: Average time for 1 iteration: NNNN nSec
END TEST CASE

TEST CASE: FIFO #1
TEST COVERAGE:
        k_fifo_init
        k_fifo_get(K_FOREVER)
        k_fifo_put
Starting test. Please wait...
TEST RESULT: SUCCESSFUL
DETAILS: Average time for 1 iteration: NNNN nSec
END TEST CASE

TEST CASE: FIFO #2
TEST COVERAGE:
        k_fifo_init
        k_fifo_get(K_FOREVER)
        k_fifo_get(TICKS_NONE)
        k_fifo_put
        k_yield
Starting test. Please wait...
TEST RESULT: SUCCESSFUL
DETAILS: Average time for 1 iteration: NNNN nSec
END TEST CASE

TEST CASE: FIFO #3
TEST COVERAGE:
        k_fifo_init
        k_fifo_get(K_FOREVER)
        k_fifo_put
        k_fifo_get(K_FOREVER)
        k_fifo_put
Starting test. Please wait...
TEST RESULT: SUCCESSFUL
DETAILS: Average time for 1 iteration: NNNN nSec
END TEST CASE

TEST CASE: Stack #1
TEST COVERAGE:
        k_stack_init
        k_stack_pop(K_FOREVER)
        k_stack_push
Starting test. Please wait...
TEST RESULT: SUCCESSFUL
DETAILS: Average time for 1 iteration: NNNN nSec
END TEST CASE

TEST CASE: Stack #2
TEST COVERAGE:
        k_stack_init
        k_stack_pop(K_FOREVER)
        k_stack_pop
        k_stack_push
        k_yield
Starting test. Please wait...
TEST RESULT: SUCCESSFUL
DETAILS: Average time for 1 iteration: NNNN nSec
END TEST CASE

TEST CASE: Stack #3
TEST COVERAGE:
        k_stack_init
        k_stack_pop(K_FOREVER)
        k_stack_push
        k_stack_pop(K_FOREVER)
        k_stack_push
Starting test. Please wait...
TEST RESULT: SUCCESSFUL
DETAILS: Average time for 1 iteration: NNNN nSec
END TEST CASE

PROJECT EXECUTION SUCCESSFUL
QEMU: Terminated