== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:02:28 (1763337748)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.6967 s, 9.8 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-ffff981106776800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.36499
Iter 1/10: OSS cache speed: 0.435255
Iter 1/10: ladvise speed: 0.428722
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.371073
Iter 2/10: OSS cache speed: 0.431914
Iter 2/10: ladvise speed: 0.39058
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.375803
Iter 3/10: OSS cache speed: 0.421212
Iter 3/10: ladvise speed: 0.402431
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.372176
Iter 4/10: OSS cache speed: 0.366639
Iter 4/10: ladvise speed: 0.420206
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.385628
Iter 5/10: OSS cache speed: 0.432891
Iter 5/10: ladvise speed: 0.383727
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.356702
Iter 6/10: OSS cache speed: 0.422086
Iter 6/10: ladvise speed: 0.447299
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.447122
Iter 7/10: OSS cache speed: 0.494053
Iter 7/10: ladvise speed: 0.358166
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.39128
Iter 8/10: OSS cache speed: 0.445649
Iter 8/10: ladvise speed: 0.443479
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.381197
Iter 9/10: OSS cache speed: 0.452417
Iter 9/10: ladvise speed: 0.446006
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.406908
Iter 10/10: OSS cache speed: 0.40773
Iter 10/10: ladvise speed: 0.486458
Average uncached read: .38
Average speedup with OSS cached read:  .43 = +13%
Average speedup with ladvise willread:  .42 = +10%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0