== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:34:34 (1788615274)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.6603 s, 7.7 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-ffff965990464800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.497257
Iter 1/10: OSS cache speed: 0.442609
Iter 1/10: ladvise speed: 0.479431
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.319414
Iter 2/10: OSS cache speed: 0.410564
Iter 2/10: ladvise speed: 0.398294
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.449551
Iter 3/10: OSS cache speed: 0.483575
Iter 3/10: ladvise speed: 0.454437
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.473343
Iter 4/10: OSS cache speed: 0.527308
Iter 4/10: ladvise speed: 0.544274
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.423294
Iter 5/10: OSS cache speed: 0.432216
Iter 5/10: ladvise speed: 0.38855
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.40783
Iter 6/10: OSS cache speed: 0.461151
Iter 6/10: ladvise speed: 0.490929
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.410556
Iter 7/10: OSS cache speed: 0.421665
Iter 7/10: ladvise speed: 0.448142
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.401071
Iter 8/10: OSS cache speed: 0.441692
Iter 8/10: ladvise speed: 0.427126
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.470807
Iter 9/10: OSS cache speed: 0.478582
Iter 9/10: ladvise speed: 0.433007
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.416176
Iter 10/10: OSS cache speed: 0.490303
Iter 10/10: ladvise speed: 0.497563
Average uncached read: .42
Average speedup with OSS cached read:  .45 = +7%
Average speedup with ladvise willread:  .45 = +7%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0