PROCESSOR-SDK-J784S4: PMU counter not working

Hi,

Due to a holiday, half of our team is currently out of the office. Please expect a 1~2 delay in responses.

Apologies for the delay, and thank you for your patience.

-Fabiana

Hi,

Sorry for the delayed response. Can you clarify what you mean by values are always 0?

Regards,

Josiitaa

Hi,

No problems. by value are always 0 I mean that, in the exemple code i give, if i check in debug mode the value of "cycleCnt1" or "cycleCnt2" it show me "0".

Regards,

Jean

Hi, 

Can you try executing the SDL pmu_test_app to see if the same behavior is observed?

Regards,

Josiitaa

Hi,

I've run the app and the same behavior is not observed

Hi,

Then there is probably some delta between your code and the SDL code. Could you provide a patch with all the changes you have made so I can try to reproduce?

Regards,

Josiitaa

Hi,

Here is the code I used in my main : 

uint32_t numCntrs, dCacheMissCnt, iCacheMissCnt, branchCnt, cycleCnt;
int32_t retValue, testResult = SDL_APP_TEST_PASS;
SDL_PMU_staticRegs pStaticRegs;
uint32_t cycleCntDiv = 0U, exportEvents = 0U, userEnable = 1U;

/* Some negative tests for code coverage on PMU */
SDL_R5PMU_cfg(1, 1, 0);
retValue = SDL_R5PMU_verifyCfg(1,0);
if(retValue != SDL_EFAIL)
{
printf(" verifyCfg API test failed \n \n");
testResult = SDL_APP_TEST_FAILED;
}
printf("%u\n", testResult);

SDL_R5PMU_enableCntr (PMU_CNTR_NUM_BRANCH, 0);
SDL_R5PMU_enableCntr (PMU_CNTR_NUM_ICACHE_MISS, 0);
SDL_R5PMU_enableCntr (PMU_CNTR_NUM_DCAHCE_MISS, 0);
SDL_R5PMU_enableAllCntrs (0);
SDL_R5PMU_readStaticRegisters(&pStaticRegs);
sdl_pmu_test_init_pmu();
/* Report number of counters implemented */
numCntrs = SDL_R5PMU_getNumCntrs();
printf("Number of PMU counters implemented is: %u\n",numCntrs);
/* Report number of branch, icache miss and dcache miss */
dCacheMissCnt = sdl_pmu_test_get_dCache_miss();
iCacheMissCnt = sdl_pmu_test_get_iCache_miss();
branchCnt = sdl_pmu_test_get_branch();
cycleCnt = sdl_pmu_test_get_cycle();

SDL_R5PMU_cfg(cycleCntDiv, exportEvents, userEnable);
SDL_R5PMU_readStaticRegisters(&pStaticRegs);

if(((uint8_t)pStaticRegs.cycleCntDiv == cycleCntDiv) &&
((uint8_t)pStaticRegs.exportEvents == exportEvents) &&
((uint8_t)pStaticRegs.userEnable == userEnable))
{
printf(" readStatic register successful\n\n");

printf("static config exportsEvents value is: %u\n",pStaticRegs.exportEvents);

printf("static config cycleCntDiv value is: %u\n",pStaticRegs.cycleCntDiv);
}
else{
printf(" readStaticRegisters failed\n");
testResult = SDL_APP_TEST_FAILED;
}
printf("%u\n", testResult);

printf("iCacheMissCnt is: %u\n",iCacheMissCnt);
printf("dCacheMissCnt is: %u\n",dCacheMissCnt);
printf("branchCnt is: %u\n",branchCnt);
printf("cycleCnt is: %u\n",cycleCnt);

printf("Setting all PMU counters to new values: \n");

/* Set and Read the Counter */
SDL_R5PMU_setResetCntr(SDL_ARM_R5_PMU_CYCLE_COUNTER_NUM, 0x3000U );
SDL_R5PMU_setResetCntr(PMU_CNTR_NUM_ICACHE_MISS, 1U );
SDL_R5PMU_setResetCntr(PMU_CNTR_NUM_DCAHCE_MISS, 1U );
SDL_R5PMU_setResetCntr(PMU_CNTR_NUM_BRANCH, 1U );

dCacheMissCnt = sdl_pmu_test_get_dCache_miss();
iCacheMissCnt = sdl_pmu_test_get_iCache_miss();
branchCnt = sdl_pmu_test_get_branch();
cycleCnt = sdl_pmu_test_get_cycle();

printf("iCacheMissCnt is: %u\n",iCacheMissCnt);
printf("dCacheMissCnt is: %u\n",dCacheMissCnt);
printf("branchCnt is: %u\n",branchCnt);
printf("cycleCnt is: %u\n",cycleCnt);

And here is the result :

0
Number of PMU counters implemented is: 3
readStatic register successful

static config exportsEvents value is: 0
static config cycleCntDiv value is: 0
0
iCacheMissCnt is: 9
dCacheMissCnt is: 8
branchCnt is: 902
cycleCnt is: 0
Setting all PMU counters to new values:
iCacheMissCnt is: 2
dCacheMissCnt is: 2
branchCnt is: 13
cycleCnt is: 12288

The value of cycleCnt is not changing

Regards

Hi, sorry for the delay

So here you got the result I expect to have. But I still don't get it.
Maybe there is problem in my makefile ?

Here's a part of my makefile :

APP_NAME=csl_pmu_test_app
BUILD_OS_TYPE = baremetal
SRCDIR=.
INCDIR=

SRCDIR += ..../ti-processor-sdk-rtos-j784s4-evm-09_01_00_06/sdl/src/ip/r5/src
SRCS_ASM_COMMON += sdl_arm_r5_pmu.asm

INCLUDE_EXTERNAL_INTERFACES=pdk
COMP_LIST_COMMON += $(PDK_COMMON_BAREMETAL_COMP)

PACKAGE_SRCS_COMMON =.
SRCS_COMMON= MCU_1_0_app.c

EXTERNAL_LNKCMD_FILE_LOCAL = linker.lds
CFLAGS_LOCAL_COMMON+= -DBARE_METAL

And all of this is use under this component :

csl_component.mk

Present in ti/csl

Maybe one of these part cause my problem ?

Regards

Jean Mich said:

Here is the code I used in my main : 

Is this the whole code in your application? Is there any reason you are using CSL instead of SDL?

Regards,

Josiitaa

Actually yes, the other part of the code is commented.

I'm trying to use it in CSL beacause later I want to do PMU on CSL app exemple like mcan, spinlock, mailbox...

Regards

Hi,

Jean Mich said:

I've run the app and the same behavior is not observed

You can integrate SDL library APIs easily. The reason I am recommending this is because you had mentioned that the SDL example application works without any issues. SDL is a safety certified library as well.

Regards,

Josiitaa

Okay, I will have a look how to do so, if you got tips I will take it, however I will do without

Regards