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mcs: allow kernel WCET estimate to be scaled

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This configuration option allows for building images destined for
simulators, which may not simulate as fast as hardware, to still be
used.
This commit is contained in:
Adrian Danis
2017-08-23 16:48:31 +10:00
committed by Kent Mcleod
parent 2329cd81dc
commit 4768465027
3 changed files with 19 additions and 2 deletions
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12
config.cmake
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@@ -442,4 +442,16 @@ config_option(
# of the currently running thread without a capability.
config_set(KernelSetTLSBaseSelf SET_TLS_BASE_SELF ${KernelSetTLSBaseSelf})
config_string(
KernelWcetScale KERNEL_WCET_SCALE
"Multiplier to scale kernel WCET estimate by: the kernel WCET estimate \
is used to ensure a thread has enough budget to get in and out of the \
kernel. When running in a simulator the WCET estimate, which is tuned \
for hardware, may not be sufficient. This option provides a hacky knob \
that can be fiddled with when running inside a simulator."
DEFAULT 1
UNQUOTE
DEPENDS "KernelIsMCS" UNDEF_DISABLED
)
add_config_library(kernel "${configure_string}")