== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:59:13 (1779872353)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.87417 s, 10.6 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-ffff8e2010074800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.423477
Iter 1/10: OSS cache speed: 0.36961
Iter 1/10: ladvise speed: 0.38374
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.409568
Iter 2/10: OSS cache speed: 0.405451
Iter 2/10: ladvise speed: 0.418268
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.448414
Iter 3/10: OSS cache speed: 0.402172
Iter 3/10: ladvise speed: 0.354245
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.368385
Iter 4/10: OSS cache speed: 0.398443
Iter 4/10: ladvise speed: 0.332483
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.397596
Iter 5/10: OSS cache speed: 0.41478
Iter 5/10: ladvise speed: 0.331751
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.398353
Iter 6/10: OSS cache speed: 0.368002
Iter 6/10: ladvise speed: 0.417203
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.390119
Iter 7/10: OSS cache speed: 0.483064
Iter 7/10: ladvise speed: 0.540784
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.542884
Iter 8/10: OSS cache speed: 0.609233
Iter 8/10: ladvise speed: 0.684857
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.370721
Iter 9/10: OSS cache speed: 0.415607
Iter 9/10: ladvise speed: 0.45797
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.437818
Iter 10/10: OSS cache speed: 0.449486
Iter 10/10: ladvise speed: 0.445306
Average uncached read: .41
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