== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:59:59 (1781618399)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.30182 s, 14.4 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-ffff9d8442a09800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.549705
Iter 1/10: OSS cache speed: 0.258237
Iter 1/10: ladvise speed: 0.372458
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.371375
Iter 2/10: OSS cache speed: 0.326591
Iter 2/10: ladvise speed: 0.264456
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.336016
Iter 3/10: OSS cache speed: 0.302886
Iter 3/10: ladvise speed: 0.317409
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.322921
Iter 4/10: OSS cache speed: 0.333104
Iter 4/10: ladvise speed: 0.293648
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.360555
Iter 5/10: OSS cache speed: 0.403925
Iter 5/10: ladvise speed: 0.374754
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.374278
Iter 6/10: OSS cache speed: 0.495048
Iter 6/10: ladvise speed: 0.515861
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.488313
Iter 7/10: OSS cache speed: 0.535446
Iter 7/10: ladvise speed: 0.536293
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.572914
Iter 8/10: OSS cache speed: 0.537532
Iter 8/10: ladvise speed: 0.541442
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.546759
Iter 9/10: OSS cache speed: 0.569621
Iter 9/10: ladvise speed: 0.572166
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.580858
Iter 10/10: OSS cache speed: 0.555729
Iter 10/10: ladvise speed: 0.580461
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