== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:43:05 (1788932585)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2921 s, 8.5 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-ffffa0bc42d00800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.362356
Iter 1/10: OSS cache speed: 0.285691
Iter 1/10: ladvise speed: 0.371919
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.354956
Iter 2/10: OSS cache speed: 0.377737
Iter 2/10: ladvise speed: 0.323407
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.340517
Iter 3/10: OSS cache speed: 0.320597
Iter 3/10: ladvise speed: 0.299403
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.356061
Iter 4/10: OSS cache speed: 0.342207
Iter 4/10: ladvise speed: 0.351779
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.335584
Iter 5/10: OSS cache speed: 0.352226
Iter 5/10: ladvise speed: 0.367234
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.356216
Iter 6/10: OSS cache speed: 0.330672
Iter 6/10: ladvise speed: 0.369525
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.393907
Iter 7/10: OSS cache speed: 0.387638
Iter 7/10: ladvise speed: 0.36353
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.394118
Iter 8/10: OSS cache speed: 0.383652
Iter 8/10: ladvise speed: 0.376052
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.374827
Iter 9/10: OSS cache speed: 0.370501
Iter 9/10: ladvise speed: 0.353517
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.347966
Iter 10/10: OSS cache speed: 0.36579
Iter 10/10: ladvise speed: 0.331588
Average uncached read: .36
Average speedup with OSS cached read:  .35 = +-2%
Average speedup with ladvise willread:  .35 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0