== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:51:02 (1790787062)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.852 s, 9.7 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff910ec71c9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.429456
Iter 1/10: OSS cache speed: 0.431876
Iter 1/10: ladvise speed: 0.4483
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.445898
Iter 2/10: OSS cache speed: 0.454318
Iter 2/10: ladvise speed: 0.415701
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.458921
Iter 3/10: OSS cache speed: 0.465405
Iter 3/10: ladvise speed: 0.408545
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.45
Iter 4/10: OSS cache speed: 0.518234
Iter 4/10: ladvise speed: 0.545607
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.379318
Iter 5/10: OSS cache speed: 0.501675
Iter 5/10: ladvise speed: 0.307179
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.437358
Iter 6/10: OSS cache speed: 0.478067
Iter 6/10: ladvise speed: 0.45846
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.470459
Iter 7/10: OSS cache speed: 0.512255
Iter 7/10: ladvise speed: 0.502985
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.536804
Iter 8/10: OSS cache speed: 0.45351
Iter 8/10: ladvise speed: 0.476739
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.460162
Iter 9/10: OSS cache speed: 0.483686
Iter 9/10: ladvise speed: 0.438847
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.468389
Iter 10/10: OSS cache speed: 0.352997
Iter 10/10: ladvise speed: 0.425285
Average uncached read: .45
Average speedup with OSS cached read:  .46 = +2%
Average speedup with ladvise willread:  .44 = +-2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0