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Add an instrumentation option for performance profiling

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Not built by default, this allows printing the emulation speed on stdout and exiting after a certain emulation time.
This commit is contained in:
Adrien Moulin
2022-08-06 14:23:11 +02:00
parent 730af4dd53
commit 3a1d9cff9a
4 changed files with 30 additions and 0 deletions
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10
src/86box.c
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@@ -138,6 +138,10 @@ char rom_path[1024] = { '\0'}; /* (O) full path to ROMs */
rom_path_t rom_paths = { "", NULL }; /* (O) full paths to ROMs */ rom_path_t rom_paths = { "", NULL }; /* (O) full paths to ROMs */
char log_path[1024] = { '\0'}; /* (O) full path of logfile */ char log_path[1024] = { '\0'}; /* (O) full path of logfile */
char vm_name[1024] = { '\0'}; /* (O) display name of the VM */ char vm_name[1024] = { '\0'}; /* (O) display name of the VM */
#ifdef USE_INSTRUMENT
uint8_t instru_enabled = 0;
uint64_t instru_run_ms = 0;
#endif
/* Configuration values. */ /* Configuration values. */
int window_remember; int window_remember;
@@ -567,6 +571,12 @@ usage:
/* .. and then exit. */ /* .. and then exit. */
return(0); return(0);
#ifdef USE_INSTRUMENT
} else if (!strcasecmp(argv[c], "--instrument")) {
if ((c+1) == argc) goto usage;
instru_enabled = 1;
sscanf(argv[++c], "%llu", &instru_run_ms);
#endif
} }
/* Uhm... out of options here.. */ /* Uhm... out of options here.. */

4
src/CMakeLists.txt
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@@ -57,6 +57,10 @@ if(VNC)
endif() endif()
endif() endif()
if(INSTRUMENT)
add_compile_definitions(USE_INSTRUMENT)
endif()
target_link_libraries(86Box cpu chipset mch dev mem fdd game cdrom zip mo hdd target_link_libraries(86Box cpu chipset mch dev mem fdd game cdrom zip mo hdd
net print scsi sio snd vid voodoo plat ui) net print scsi sio snd vid voodoo plat ui)

4
src/include/86box/86box.h
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@@ -76,6 +76,10 @@ extern uint64_t source_hwnd;
extern char rom_path[1024]; /* (O) full path to ROMs */ extern char rom_path[1024]; /* (O) full path to ROMs */
extern char log_path[1024]; /* (O) full path of logfile */ extern char log_path[1024]; /* (O) full path of logfile */
extern char vm_name[1024]; /* (O) display name of the VM */ extern char vm_name[1024]; /* (O) display name of the VM */
#ifdef USE_INSTRUMENT
extern uint8_t instru_enabled;
extern uint64_t instru_run_ms;
#endif
#define window_x monitor_settings[0].mon_window_x #define window_x monitor_settings[0].mon_window_x
#define window_y monitor_settings[0].mon_window_y #define window_y monitor_settings[0].mon_window_y

12
src/qt/qt_main.cpp
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@@ -109,9 +109,21 @@ main_thread_fn()
if (drawits > 50) if (drawits > 50)
drawits = 0; drawits = 0;
#ifdef USE_INSTRUMENT
uint64_t start_time = elapsed_timer.nsecsElapsed();
#endif
/* Run a block of code. */ /* Run a block of code. */
pc_run(); pc_run();
#ifdef USE_INSTRUMENT
if (instru_enabled) {
uint64_t elapsed_us = (elapsed_timer.nsecsElapsed() - start_time) / 1000;
uint64_t total_elapsed_us = (uint64_t)((double)tsc / cpu_s->rspeed * 1000);
printf("[instrument] %llu, %llu\n", total_elapsed_us, elapsed_us);
if (instru_run_ms && total_elapsed_us >= instru_run_ms)
break;
}
#endif
/* Every 200 frames we save the machine status. */ /* Every 200 frames we save the machine status. */
if (++frames >= 200 && nvr_dosave) { if (++frames >= 200 && nvr_dosave) {
qt_nvr_save(); qt_nvr_save();