== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:56:18 (1788778578)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.5451 s, 7.7 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-ffff95064331d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.320748
Iter 1/10: OSS cache speed: 0.292274
Iter 1/10: ladvise speed: 0.297246
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.310123
Iter 2/10: OSS cache speed: 0.309065
Iter 2/10: ladvise speed: 0.349119
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.366536
Iter 3/10: OSS cache speed: 0.340906
Iter 3/10: ladvise speed: 0.360321
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.371932
Iter 4/10: OSS cache speed: 0.365003
Iter 4/10: ladvise speed: 0.375756
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.36501
Iter 5/10: OSS cache speed: 0.380882
Iter 5/10: ladvise speed: 0.384658
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.406602
Iter 6/10: OSS cache speed: 0.419184
Iter 6/10: ladvise speed: 0.398495
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.389204
Iter 7/10: OSS cache speed: 0.391009
Iter 7/10: ladvise speed: 0.367519
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.368071
Iter 8/10: OSS cache speed: 0.351114
Iter 8/10: ladvise speed: 0.383493
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.331827
Iter 9/10: OSS cache speed: 0.337354
Iter 9/10: ladvise speed: 0.374282
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.35683
Iter 10/10: OSS cache speed: 0.349141
Iter 10/10: ladvise speed: 0.347267
Average uncached read: .35
Average speedup with OSS cached read:  .35 = +0%
Average speedup with ladvise willread:  .36 = +2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0