== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:53:32 (1783972412)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 17.2636 s, 6.1 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-ffff8daa91b93000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.290439
Iter 1/10: OSS cache speed: 0.343658
Iter 1/10: ladvise speed: 0.352497
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.353943
Iter 2/10: OSS cache speed: 0.379192
Iter 2/10: ladvise speed: 0.369708
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.33773
Iter 3/10: OSS cache speed: 0.368291
Iter 3/10: ladvise speed: 0.388303
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.329875
Iter 4/10: OSS cache speed: 0.374688
Iter 4/10: ladvise speed: 0.341036
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.293175
Iter 5/10: OSS cache speed: 0.2962
Iter 5/10: ladvise speed: 0.332228
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.374828
Iter 6/10: OSS cache speed: 0.407432
Iter 6/10: ladvise speed: 0.430833
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.36821
Iter 7/10: OSS cache speed: 0.435264
Iter 7/10: ladvise speed: 0.329147
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.258679
Iter 8/10: OSS cache speed: 0.370568
Iter 8/10: ladvise speed: 0.395629
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.29919
Iter 9/10: OSS cache speed: 0.354467
Iter 9/10: ladvise speed: 0.38017
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.336368
Iter 10/10: OSS cache speed: 0.350252
Iter 10/10: ladvise speed: 0.334804
Average uncached read: .32
Average speedup with OSS cached read:  .36 = +12%
Average speedup with ladvise willread:  .36 = +12%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0