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test: mem_protect/demand_paging: support using timing funcs

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This adds bits to support using timing functions for displaying
paging histograms. Currently on qemu_x86_tiny is supported.

Also shorten the test names.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This commit is contained in:
Daniel Leung 2021-03-31 14:20:06 -07:00 • committed by Anas Nashif
commit b6fd177d92
2 changed files with 54 additions and 1 deletions
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43
tests/kernel/mem_protect/demand_paging/src/main.c
View file

@ -6,6 +6,7 @@
#include <ztest.h>
#include <sys/mem_manage.h>
#include <timing/timing.h>
#include <mmu.h>
#ifdef CONFIG_BACKING_STORE_RAM_PAGES
@ -14,6 +15,44 @@
#error "Unsupported configuration"
#endif
#ifdef CONFIG_DEMAND_PAGING_TIMING_HISTOGRAM
#ifdef CONFIG_DEMAND_PAGING_STATS_USING_TIMING_FUNCTIONS
#ifdef CONFIG_BOARD_QEMU_X86
unsigned long
z_eviction_histogram_bounds[CONFIG_DEMAND_PAGING_TIMING_HISTOGRAM_NUM_BINS] = {
10000,
20000,
30000,
40000,
50000,
60000,
70000,
80000,
100000,
ULONG_MAX
};
unsigned long
z_backing_store_histogram_bounds[CONFIG_DEMAND_PAGING_TIMING_HISTOGRAM_NUM_BINS] = {
10000,
50000,
100000,
150000,
200000,
250000,
500000,
750000,
1000000,
ULONG_MAX
};
#else
#error "Need to define paging histogram bounds"
#endif
#endif /* CONFIG_DEMAND_PAGING_STATS_USING_TIMING_FUNCTIONS */
#endif /* CONFIG_DEMAND_PAGING_TIMING_HISTOGRAM */
size_t arena_size;
char *arena;
@ -316,7 +355,11 @@ bool print_histogram(struct k_mem_paging_histogram_t *hist)
for (idx = 0;
idx < CONFIG_DEMAND_PAGING_TIMING_HISTOGRAM_NUM_BINS;
idx++) {
#ifdef CONFIG_DEMAND_PAGING_STATS_USING_TIMING_FUNCTIONS
time_ns = timing_cycles_to_ns(hist->bounds[idx]);
#else
time_ns = k_cyc_to_ns_ceil64(hist->bounds[idx]);
#endif
printk(" <= %llu ns (%lu cycles): %lu\n", time_ns,
hist->bounds[idx], hist->counts[idx]);
if (hist->counts[idx] > 0U) {

12
tests/kernel/mem_protect/demand_paging/testcase.yaml
View file

@ -1,4 +1,14 @@
tests:
kernel.memory_protection.demand_paging:
kernel.demand_paging:
tags: kernel mmu demand_paging ignore_faults
filter: CONFIG_DEMAND_PAGING
kernel.demand_paging.timing_funcs:
tags: kernel mmu demand_paging ignore_faults
platform_allow: qemu_x86_tiny
filter: CONFIG_DEMAND_PAGING
extra_configs:
# The timing functions take up some more memory.
# So need to shrink an even number of page to
# compensate for that (default is 16).
- CONFIG_BACKING_STORE_RAM_PAGES=14
- CONFIG_DEMAND_PAGING_STATS_USING_TIMING_FUNCTIONS=y