== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:16:58 (1773609418)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.8607 s, 7.6 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-ffff99980af4a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.375459
Iter 1/10: OSS cache speed: 0.460371
Iter 1/10: ladvise speed: 0.379864
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.403446
Iter 2/10: OSS cache speed: 0.360047
Iter 2/10: ladvise speed: 0.379632
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.43389
Iter 3/10: OSS cache speed: 0.38362
Iter 3/10: ladvise speed: 0.306143
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.31405
Iter 4/10: OSS cache speed: 0.384278
Iter 4/10: ladvise speed: 0.348098
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.268022
Iter 5/10: OSS cache speed: 0.364825
Iter 5/10: ladvise speed: 0.450386
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.338196
Iter 6/10: OSS cache speed: 0.40056
Iter 6/10: ladvise speed: 0.332393
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.316881
Iter 7/10: OSS cache speed: 0.311512
Iter 7/10: ladvise speed: 0.314856
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.290292
Iter 8/10: OSS cache speed: 0.303981
Iter 8/10: ladvise speed: 0.297787
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.273872
Iter 9/10: OSS cache speed: 0.294192
Iter 9/10: ladvise speed: 0.304208
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.293063
Iter 10/10: OSS cache speed: 0.379291
Iter 10/10: ladvise speed: 0.308123
Average uncached read: .33
Average speedup with OSS cached read:  .36 = +9%
Average speedup with ladvise willread:  .34 = +3%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0