== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:43:45 (1788799425)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.3744 s, 7.8 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-ffff97c610dda000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.434496
Iter 1/10: OSS cache speed: 0.387143
Iter 1/10: ladvise speed: 0.349925
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.382195
Iter 2/10: OSS cache speed: 0.441729
Iter 2/10: ladvise speed: 0.429779
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.393994
Iter 3/10: OSS cache speed: 0.454775
Iter 3/10: ladvise speed: 0.410965
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.434916
Iter 4/10: OSS cache speed: 0.47737
Iter 4/10: ladvise speed: 0.401771
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.398442
Iter 5/10: OSS cache speed: 0.360719
Iter 5/10: ladvise speed: 0.42658
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.483399
Iter 6/10: OSS cache speed: 0.402785
Iter 6/10: ladvise speed: 0.408965
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.476327
Iter 7/10: OSS cache speed: 0.378539
Iter 7/10: ladvise speed: 0.424852
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.482914
Iter 8/10: OSS cache speed: 0.437962
Iter 8/10: ladvise speed: 0.394517
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.512669
Iter 9/10: OSS cache speed: 0.497718
Iter 9/10: ladvise speed: 0.486269
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.476602
Iter 10/10: OSS cache speed: 0.438997
Iter 10/10: ladvise speed: 0.406081
Average uncached read: .44
Average speedup with OSS cached read:  .42 = +-4%
Average speedup with ladvise willread:  .41 = +-6%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0