== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:03:08 (1755097388)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.37081 s, 19.5 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-ffff90494298c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.84181
Iter 1/10: OSS cache speed: 1.87088
Iter 1/10: ladvise speed: 1.98259
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.09454
Iter 2/10: OSS cache speed: 2.09816
Iter 2/10: ladvise speed: 2.02673
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.19039
Iter 3/10: OSS cache speed: 2.1833
Iter 3/10: ladvise speed: 2.21374
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.08299
Iter 4/10: OSS cache speed: 2.02086
Iter 4/10: ladvise speed: 1.80493
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.80757
Iter 5/10: OSS cache speed: 1.82224
Iter 5/10: ladvise speed: 2.075
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.71085
Iter 6/10: OSS cache speed: 1.19354
Iter 6/10: ladvise speed: 1.3574
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.51164
Iter 7/10: OSS cache speed: 1.28311
Iter 7/10: ladvise speed: 1.17845
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.93241
Iter 8/10: OSS cache speed: 2.32799
Iter 8/10: ladvise speed: 2.36474
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.34993
Iter 9/10: OSS cache speed: 2.36281
Iter 9/10: ladvise speed: 2.3212
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.23299
Iter 10/10: OSS cache speed: 2.2375
Iter 10/10: ladvise speed: 1.14884
Average uncached read: 1.97
Average speedup with OSS cached read:  1.94 = +-1%
Average speedup with ladvise willread:  1.84 = +-6%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0