== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:10:43 (1788466243)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.4305 s, 9.2 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-ffff8e8d02e42800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.45422
Iter 1/10: OSS cache speed: 0.44865
Iter 1/10: ladvise speed: 0.465618
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.45607
Iter 2/10: OSS cache speed: 0.455416
Iter 2/10: ladvise speed: 0.445373
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.474194
Iter 3/10: OSS cache speed: 0.471462
Iter 3/10: ladvise speed: 0.494722
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.483833
Iter 4/10: OSS cache speed: 0.507286
Iter 4/10: ladvise speed: 0.479809
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.528606
Iter 5/10: OSS cache speed: 0.538288
Iter 5/10: ladvise speed: 0.479756
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.476424
Iter 6/10: OSS cache speed: 0.502429
Iter 6/10: ladvise speed: 0.490753
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.492378
Iter 7/10: OSS cache speed: 0.459601
Iter 7/10: ladvise speed: 0.451094
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.410971
Iter 8/10: OSS cache speed: 0.318233
Iter 8/10: ladvise speed: 0.393707
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.378067
Iter 9/10: OSS cache speed: 0.338329
Iter 9/10: ladvise speed: 0.3906
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.394935
Iter 10/10: OSS cache speed: 0.38703
Iter 10/10: ladvise speed: 0.345334
Average uncached read: .45
Average speedup with OSS cached read:  .44 = +-2%
Average speedup with ladvise willread:  .44 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0