Add benchmark results from running on x86 and arm32.

app/context_switch/CMakeLists.txt

@@ -4,7 +4,7 @@ if (CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64" AND CMAKE_SYSTEM_NAME STREQUAL "Lin
     SET(SWITCH_ASSEMBLY "custom_stack_callback_x86_64.s")
     SET(FIBER_ASSEMBLY "fiber_call_x86_64.s" "fiber_continue_x86_64.s")
 elseif (CMAKE_SYSTEM_PROCESSOR STREQUAL "armv7l" AND CMAKE_SYSTEM_NAME STREQUAL "Linux")
-    SET(SWITCH_ASSEMBLY "custom_stack_callback_arm32.s" fiber_call.h fiber_call.cpp)
+    SET(SWITCH_ASSEMBLY "custom_stack_callback_arm32.s" fiber_call.h context_switcher.cpp)
     SET(FIBER_ASSEMBLY "fiber_call_arm32.s" "fiber_continue_arm32.s")
 else ()
     MESSAGE(FATAL_ERROR "Platform (${CMAKE_SYSTEM_PROCESSOR} on ${CMAKE_SYSTEM_NAME}) not supported! Please see Readme for instructions to port.")
@@ -14,7 +14,7 @@ endif ()
 add_executable(context_switch
         main.cpp
         ${SWITCH_ASSEMBLY}
-        fiber_call.h fiber_call.cpp
+        fiber_call.h
         ${FIBER_ASSEMBLY})
 
 # Example for adding the library to your app (as a cmake project dependency)

app/context_switch/deboost.context/CMakeLists.txt

@@ -71,6 +71,7 @@ target_include_directories(fcontext
         PRIVATE include/fcontext
         INTERFACE include)
 
+set_property(TARGET fcontext PROPERTY INTERPROCEDURAL_OPTIMIZATION FALSE)
 set_target_properties(fcontext PROPERTIES FOLDER Deps ${IOS_GENERAL_PROPERTIES})
 
 install(TARGETS fcontext DESTINATION lib)

app/context_switch/fiber_call.cpp

-#include "fiber_call.h"
-
-namespace pls {
-namespace internal {
-namespace base {
-
-}
-}
-}

app/context_switch/measurements/asm32.txt

+Output on the banana pi
+
+Base
+Function Call    :    4975613, 4.97561
+Simple Loop      :    1269267, 1.26927
+Longjmp
+Stack Switching  :   11255742, 11.25574
+Full Continuation:   54504045, 54.50404
+Jump Continuation:  128717262, 128.71727
+Boost
+FContext Fast    :   51930723, 51.93073
+FContext Clean   :   57454099, 57.45410
+FContext CallCC  :  101296455, 101.29646
+Custom
+Custom Fast Call :   23745875, 23.74588
+
+
+Used stack size about 92 bytes.
+

app/context_switch/measurements/plot.py

+import numpy as np
+from matplotlib import pyplot as plt
+
+labels = ['loop overhead',
+          'function call',
+          'stack switching',
+          'setjmp + stack switching',
+          'fcontext switch, return',
+          'fcontext create, switch, return',
+          'pseudo callcc',
+          'custom'
+          ]
+
+call_color = (0.3, 0.1, 0.4, 0.6)
+setjmp_color = (0.3, 0.3, 0.4, 0.6)
+fcontext_color = (0.3, 0.6, 0.4, 0.6)
+custom_color = (0.3, 1.0, 0.4, 0.6)
+colors = [
+    call_color,
+    call_color,
+    setjmp_color,
+    setjmp_color,
+    fcontext_color,
+    fcontext_color,
+    fcontext_color,
+    custom_color
+]
+
+dataX86 = np.array([
+    0.55,
+    2.79,
+    5.60,
+    14.93,
+    9.51,
+    11.00,
+    18.66,
+    7.86,
+])
+dataARM32 = np.array([  # TODO: Run and fill in data...damn that laptop crash
+    1.26,
+    4.97,
+    11.25,
+    54.50,
+    51.93,
+    57.45,
+    101.29,
+    23.74,
+])
+data = dataARM32
+
+assert (len(labels) == len(data), "Must fill in all data!")
+xAxis = np.array(range(0, len(labels)))
+
+plt.bar(xAxis, data, color=colors)
+plt.xticks(xAxis, labels, rotation=90)
+plt.ylabel('runtime in ns')
+plt.subplots_adjust(bottom=0.5, top=0.98)
+
+plt.show()

app/context_switch/measurements/x86_64.txt

+Output on my x86_64 laptop:
+- Ubuntu 18.04.3 LTS
+- Core i7-8550U CPU @1.80 GHz (turbo boost/frequency scaling disabled)
+- Results of best run using nice -20
+
+Base
+Function Call    :    2796349, 2.79635
+Simple Loop      :     557062, 0.55706
+Longjmp
+Stack Switching  :    5602146, 5.60215
+Full Continuation:   14935945, 14.93594
+Jump Continuation:   33523215, 33.52322
+Boost
+FContext Fast    :    9517573, 9.51757
+FContext Clean   :   11006061, 11.00606
+FContext CallCC  :   18661906, 18.66191
+Custom
+Custom Fast Call :    7860666, 7.86067
+
+
+Used stack size about 32 bytes.