def precondition(self, nj=1, iod=1):
'''
Workload independent preconditioning for SSDs.
Write two times the device with streaming I/O.
@return True if precontioning succeded
@exception RuntimeError if fio command fails
'''
job = FioJob()
job.initialize()
job.addKVArg("filename", self.getDevPath())
job.addKVArg("bs", "128k")
job.addKVArg("rw", "write")
job.addKVArg("direct", "1")
job.addSglArg("minimal")
job.addKVArg("numjobs", str(nj))
job.addKVArg("ioengine", "libaio")
job.addKVArg("iodepth", str(iod))
job.addSglArg("group_reporting")
job.addSglArg('refill_buffers')
for i in range(SSD.wlIndPrecRnds):
logging.info("# Starting preconditioning round " + str(i))
job.addKVArg("name", self.getDevName() + '-run' + str(i))
call, out = job.start()
if call == False:
logging.error(
"# Could not carry out workload independent preconditioning"
)
raise RuntimeError, "precondition error, fio command error"
else:
logging.info(out)
logging.info("# Finished workload independent preconditioning")
return True
def __init__(self, testname, device, options=None):
'''
Constructor
@param testname Name of the test, specifies the output file
@param device The tested device, a device object
'''
## The name of the test, is used to give the resulting files a name
self.__testname = testname
## The tested device, a Device object
self.__device = device
## User defined options
self.__options = options
## A fio job used to run the tests
self.__fioJob = FioJob()
## A list of filenames representing the generated plots
self.__figures = []
## Measurement overview tables, from which plots are generated
self.__tables = []
