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using only instret[h] and cycle[h] for performance evaluation

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stnolting 2020-07-11 13:06:52 +02:00
parent 48ae50154a
commit 16fd74de3f
1 changed files with 4 additions and 12 deletions
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16
sw/example/coremark/core_portme.c
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@ -71,7 +71,7 @@ CORE_TICKS elapsed_cycles; // NEORV32 specific
or zeroing some system parameters - e.g. setting the cpu clocks cycles to 0.
*/
void start_time(void) {
elapsed_cycles = neorv32_mtime_get_time();
elapsed_cycles = neorv32_cpu_get_cycle();
//GETMYTIME(&start_time_val );
}
/* Function : stop_time
@ -93,7 +93,7 @@ void stop_time(void) {
and the resolution is controlled by <TIMER_RES_DIVIDER>
*/
CORE_TICKS get_time(void) {
CORE_TICKS elapsed = ((CORE_TICKS)neorv32_mtime_get_time()) - elapsed_cycles;
CORE_TICKS elapsed = ((CORE_TICKS)neorv32_cpu_get_cycle()) - elapsed_cycles;
elapsed_cycles = elapsed;
//CORE_TICKS elapsed=(CORE_TICKS)(MYTIMEDIFF(stop_time_val, start_time_val));
return elapsed;
@ -127,12 +127,6 @@ void portable_init(core_portable *p, int *argc, char *argv[])
// setup neorv32 UART
neorv32_uart_setup(BAUD_RATE, 0, 0);
// check if MTIME unit was synthesized
if (!neorv32_mtime_available()) {
neorv32_uart_printf("NEORV32: Error! No MTIME unit synthesized!");
while(1);
}
neorv32_uart_printf("NEORV32: Processor running at %u Hz\n", (uint32_t)neorv32_cpu_csr_read(CSR_MCLOCK));
neorv32_uart_printf("NEORV32: Executing coremark (%u iterations). This may take some time...\n\n", (uint32_t)ITERATIONS);
@ -163,10 +157,8 @@ void portable_fini(core_portable *p)
} exe_instructions, exe_time;
exe_time.uint64 = (uint64_t)elapsed_cycles;
exe_cycles.uint32[0] = neorv32_cpu_csr_read(CSR_TIME);
exe_cycles.uint32[1] = neorv32_cpu_csr_read(CSR_TIMEH);
exe_instructions.uint32[0] = neorv32_cpu_csr_read(CSR_INSTRET);
exe_instructions.uint32[1] = neorv32_cpu_csr_read(CSR_INSTRETH);
exe_cycles.uint64 = neorv32_cpu_get_cycle();
exe_instructions.uint64 = neorv32_cpu_get_instret;
neorv32_uart_printf("\nNEORV32: Executed instructions 0x%x_%x\n", (uint32_t)exe_instructions.uint32[1], (uint32_t)exe_instructions.uint32[0]);
neorv32_uart_printf("NEORV32: Total required clock cycles 0x%x_%x\n", (uint32_t)exe_cycles.uint32[1], (uint32_t)exe_cycles.uint32[0]);