Function: value_wait

Product	Supported
Atlas 350 Accelerator Card	√
Atlas A3 training product/Atlas A3 inference product	√
Atlas A2 training product/Atlas A2 inference product	√
Atlas training product	√
Atlas inference product	x
Atlas 200I/500 A2 inference product	x

Unblocks the data in the specified memory when the data meets certain conditions.

C Prototype

aclError aclrtValueWait(void* devAddr, uint64_t value, uint32_t flag, aclrtStream stream)

Python Function

ret = acl.rt.value_wait(devAddr, value, flag, stream)

Parameter	Description
devAddr	Int, device memory address. The valid memory bit width of dev_addr is 64bit.
value	Int, value to be compared with the data in the memory.
flag	Int, comparison mode. The data will be unblocked after the conditions are met. The options are as follows: ACL_STREAM_WAIT_VALUE_GEQ = 0x0; # Wait (int64_t) (* devAddr - value) >= 0 ACL_STREAM_WAIT_VALUE_EQ = 0x1; # to * devAddr == value ACL_STREAM_WAIT_VALUE_AND = 0x2; # to (devAddr & value)! = 0 ACL_STREAM_WAIT_VALUE_NOR = 0x3; # to ~(devAddr \| value)! = 0
stream	Int, stream. The value 0 can be passed, indicating that the default stream is used.

Return Value	Description
ret	Int, error code. 0 on success; else, failure.

Parent topic: Memory Management