== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:27:26 (1787732846)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.83177 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-ffff9680d0333000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.422412
Iter 1/10: OSS cache speed: 0.391931
Iter 1/10: ladvise speed: 0.428104
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.518098
Iter 2/10: OSS cache speed: 0.498406
Iter 2/10: ladvise speed: 0.461068
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.435997
Iter 3/10: OSS cache speed: 0.438618
Iter 3/10: ladvise speed: 0.411149
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.463515
Iter 4/10: OSS cache speed: 0.424189
Iter 4/10: ladvise speed: 0.333815
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.432782
Iter 5/10: OSS cache speed: 0.459793
Iter 5/10: ladvise speed: 0.451791
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.418338
Iter 6/10: OSS cache speed: 0.41642
Iter 6/10: ladvise speed: 0.449208
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.463285
Iter 7/10: OSS cache speed: 0.397702
Iter 7/10: ladvise speed: 0.485312
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.462772
Iter 8/10: OSS cache speed: 0.430537
Iter 8/10: ladvise speed: 0.48202
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.496803
Iter 9/10: OSS cache speed: 0.447789
Iter 9/10: ladvise speed: 0.373952
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.4264
Iter 10/10: OSS cache speed: 0.455614
Iter 10/10: ladvise speed: 0.454268
Average uncached read: .45
Average speedup with OSS cached read:  .43 = +-4%
Average speedup with ladvise willread:  .43 = +-4%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0