MaliHwCntrReader doesn't probe mmuL2Count of Mali-T760x MP8 in Samsung Galaxy S6(SM-G920K)

Hi, I try to measure our game's performance on galaxy s6(SM-G920K). I measured on galaxy s7 successfully, but I coundn't do that on s6. I added some log code to gatord source code, and got this message. What should I do??

MaliHwCntrReader::create(device = 0xf4f24290)
{
 unsigned probeMMUCount(device = 0xf4f24290)
 {
 MaliHwCntrReader::create(device = 0xf4f24290, mmul2count = 1, jm = 0, shader = 0, tilter = 0, mmuL2 = ffffffff)
 {
 MaliHwCntrReader::MaliHwCntrReader(device = 0xf4f24290, mmul2count = 1, buffercount = 1, jmBM = 0, shaderBM = 0, tilerBM = 0, mmuL2BM = ffffffff)
 {
 device file path = / dev / mali0
 MaliHwCntrReader : ABI version : 10.6
 KBASE_FUNC_SET_FLAGS : OK
 KBASE_FUNC_HWCNT_READER_SETUP : hwcntReaderFd = 5
 KBASE_HWCNT_READER_GET_API_VERSION : api_version = 1
 KBASE_HWCNT_READER_GET_BUFFER_SIZE : sampleBufferSize = 6144
 KBASE_HWCNT_READER_GET_HWVER : hardwareVersion = 5
 MaliHwCntrReader : Could not mmap sample buffer
 }
 MaliHwCntrReader::MaliHwCntrReader(device = 0xf4f24290, mmul2count = 1, buffercount = 2, jmBM = 0, shaderBM = 0, tilerBM = 0, mmuL2BM = ffffffff)
 {
 device file path = / dev / mali0
 MaliHwCntrReader : ABI version : 10.6
 KBASE_FUNC_SET_FLAGS : OK
 KBASE_FUNC_HWCNT_READER_SETUP : hwcntReaderFd = 5
 KBASE_HWCNT_READER_GET_API_VERSION : api_version = 1
 KBASE_HWCNT_READER_GET_BUFFER_SIZE : sampleBufferSize = 6144
 KBASE_HWCNT_READER_GET_HWVER : hardwareVersion = 5
 mmap(nullptr, bufferCount_ * sampleBufferSize, PROT_READ...) : OK
 initialize = true
 }

 MaliHwCntrReader: Successfully created reader, with buffer size of 2
 } // MaliHwCntrReader::create(device=0xf4f24290,mmul2count=1,jm=0,shader=0,tilter=0,mmuL2=ffffffff) 

 [MaliHwCntrReader]::probeBlockMaskCount()
 {
 MaliHwCntrReader::triggerCounterRead()
 {
 ioctl(hwcntReaderFd = 5, KBASE_HWCNT_READER_DUMP) : rcode = -1, errno = 22, Invalid argument
 }
 MaliHwCntrReader::triggerCounterRead()
 {
 ioctl(hwcntReaderFd = 5, KBASE_HWCNT_READER_DUMP) : rcode = -1, errno = 22, Invalid argument
 }
 MaliHwCntrReader::triggerCounterRead()
 {
 ioctl(hwcntReaderFd = 5, KBASE_HWCNT_READER_DUMP) : rcode = -1, errno = 22, Invalid argument
 }
 MaliHwCntrReader::triggerCounterRead()
 {
 ioctl(hwcntReaderFd = 5, KBASE_HWCNT_READER_DUMP) : rcode = -1, errno = 22, Invalid argument
 }
 MaliHwCntrReader::triggerCounterRead()
 {
 ioctl(hwcntReaderFd = 5, KBASE_HWCNT_READER_DUMP) : rcode = -1, errno = 22, Invalid argument
 }
 MaliHwCntrReader::triggerCounterRead()
 {
 ioctl(hwcntReaderFd = 5, KBASE_HWCNT_READER_DUMP) : rcode = -1, errno = 22, Invalid argument
 }
 MaliHwCntrReader::triggerCounterRead()
 {
 ioctl(hwcntReaderFd = 5, KBASE_HWCNT_READER_DUMP) : rcode = -1, errno = 22, Invalid argument
 }
 MaliHwCntrReader::triggerCounterRead()
 {
 ioctl(hwcntReaderFd = 5, KBASE_HWCNT_READER_DUMP) : rcode = -1, errno = 22, Invalid argument
 }
 MaliHwCntrReader::triggerCounterRead()
 {
 ioctl(hwcntReaderFd = 5, KBASE_HWCNT_READER_DUMP) : rcode = -1, errno = 22, Invalid argument
 }
 MaliHwCntrReader::triggerCounterRead()
 {
 ioctl(hwcntReaderFd = 5, KBASE_HWCNT_READER_DUMP) : rcode = -1, errno = 22, Invalid argument
 }
 }
 } // probeMMUCount(device = 0xf4f24290)

 MaliHwCntrReader::create(device = 0xf4f24290, mmul2count = 0, jm = ffffffff, shader = ffffffff, tilter = ffffffff, mmuL2 = ffffffff)
 {
 MaliHwCntrReader::MaliHwCntrReader(device = 0xf4f24290, mmul2count = 0, buffercount = 1, jmBM = ffffffff, shaderBM = ffffffff, tilerBM = ffffffff, mmuL2BM = ffffffff)
 {
 device file path = / dev / mali0
 MaliHwCntrReader : ABI version : 10.6
 KBASE_FUNC_SET_FLAGS : OK
 KBASE_FUNC_HWCNT_READER_SETUP : hwcntReaderFd = 5
 KBASE_HWCNT_READER_GET_API_VERSION : api_version = 1
 KBASE_HWCNT_READER_GET_BUFFER_SIZE : sampleBufferSize = 6144
 KBASE_HWCNT_READER_GET_HWVER : hardwareVersion = 5
 MaliHwCntrReader : Hardware version 5 detected, but mmuL2BlockCount = 0
 }
 MaliHwCntrReader: created reader, with buffer size of 1. but does not initialized.
 } // MaliHwCntrReader::create(device=0xf4f24290,mmul2count=0,jm=ffffffff,shader=ffffffff,tilter=ffffffff,mmuL2=ffffffff) 
} // [MaliHwCntrReader::create(device = 0xf4f24290)