== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:53:27 (1782759207)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.33027 s, 16.6 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-ffff96b6c2cc6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.687676
Iter 1/10: OSS cache speed: 0.798833
Iter 1/10: ladvise speed: 0.869957
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.914437
Iter 2/10: OSS cache speed: 0.324662
Iter 2/10: ladvise speed: 0.329447
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.395953
Iter 3/10: OSS cache speed: 0.38603
Iter 3/10: ladvise speed: 0.339102
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.366532
Iter 4/10: OSS cache speed: 0.381717
Iter 4/10: ladvise speed: 0.365407
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.398142
Iter 5/10: OSS cache speed: 0.287157
Iter 5/10: ladvise speed: 0.30377
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.312691
Iter 6/10: OSS cache speed: 0.312351
Iter 6/10: ladvise speed: 0.358903
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.357357
Iter 7/10: OSS cache speed: 0.324026
Iter 7/10: ladvise speed: 0.302571
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.333354
Iter 8/10: OSS cache speed: 0.374283
Iter 8/10: ladvise speed: 0.279718
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.325355
Iter 9/10: OSS cache speed: 0.373215
Iter 9/10: ladvise speed: 0.369387
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.37629
Iter 10/10: OSS cache speed: 0.383272
Iter 10/10: ladvise speed: 0.362412
Average uncached read: .44
Average speedup with OSS cached read:  .39 = +-11%
Average speedup with ladvise willread:  .38 = +-13%
Speedup with OSS cached read less than 20%,  got -11%. Skipping ladvise willread check.
fail_loc=0