1 [global] 2 bs=1m 3 ioengine=pmemblk 4 norandommap 5 time_based=1 6 runtime=30 7 group_reporting 8 disable_lat=1 9 disable_slat=1 10 disable_clat=1 11 clat_percentiles=0 12 cpus_allowed_policy=split 13 14 # For the pmemblk engine: 15 # 16 # IOs always complete immediately 17 # IOs are always direct 18 # Must use threads 19 # 20 iodepth=1 21 direct=1 22 thread=1 23 numjobs=16 24 # 25 # Unlink can be used to remove the files when done, but if you are 26 # using serial runs with stonewall, and you want the files to be created 27 # only once and unlinked only at the very end, then put the unlink=1 28 # in the last group. This is the method demonstrated here. 29 # 30 # Note that if you have a read-only group and if the files will be 31 # newly created, then all of the data will read back as zero and the 32 # read will be optimized, yielding performance that is different from 33 # that of reading non-zero blocks (or unoptimized zero blocks). 34 # 35 unlink=0 36 # 37 # The pmemblk engine does IO to files in a DAX-mounted filesystem. 38 # The filesystem should be created on an NVDIMM (e.g /dev/pmem0) 39 # and then mounted with the '-o dax' option. Note that the engine 40 # accesses the underlying NVDIMM directly, bypassing the kernel block 41 # layer, so the usual filesystem/disk performance monitoring tools such 42 # as iostat will not provide useful data. 43 # 44 # Here we specify a test file on each of two NVDIMMs. The first 45 # number after the file name is the block size in bytes (4096 bytes 46 # in this example). The second number is the size of the file to 47 # create in MiB (1 GiB in this example); note that the actual usable 48 # space available to fio will be less than this as libpmemblk requires 49 # some space for metadata. 50 # 51 # Currently, the minimum block size is 512 bytes and the minimum file 52 # size is about 17 MiB (these are libpmemblk requirements). 53 # 54 # While both files in this example have the same block size and file 55 # size, this is not required. 56 # 57 filename=/pmem0/fio-test,4096,1024 58 filename=/pmem1/fio-test,4096,1024 59 60 [pmemblk-write] 61 rw=randwrite 62 stonewall 63 64 [pmemblk-read] 65 rw=randread 66 stonewall 67 # 68 # We're done, so unlink the file: 69 # 70 unlink=1 71 72
