== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:32:44 (1767317564)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.82522 s, 10.7 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-ffff9af302e9a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.556911
Iter 1/10: OSS cache speed: 0.53467
Iter 1/10: ladvise speed: 0.554858
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.576632
Iter 2/10: OSS cache speed: 0.643718
Iter 2/10: ladvise speed: 0.553166
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.456856
Iter 3/10: OSS cache speed: 0.497815
Iter 3/10: ladvise speed: 0.608305
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.522508
Iter 4/10: OSS cache speed: 0.617686
Iter 4/10: ladvise speed: 0.598566
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.521276
Iter 5/10: OSS cache speed: 0.534179
Iter 5/10: ladvise speed: 0.479776
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.408504
Iter 6/10: OSS cache speed: 0.543585
Iter 6/10: ladvise speed: 0.452581
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.498845
Iter 7/10: OSS cache speed: 0.551178
Iter 7/10: ladvise speed: 0.606471
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.550858
Iter 8/10: OSS cache speed: 0.602637
Iter 8/10: ladvise speed: 0.512192
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.542151
Iter 9/10: OSS cache speed: 0.589608
Iter 9/10: ladvise speed: 0.578581
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.466992
Iter 10/10: OSS cache speed: 0.582888
Iter 10/10: ladvise speed: 0.602724
Average uncached read: .51
Average speedup with OSS cached read:  .56 = +9%
Average speedup with ladvise willread:  .55 = +7%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0