== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:26:15 (1786821975)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.0781 s, 9.5 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-ffff94526000a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.458369
Iter 1/10: OSS cache speed: 0.490292
Iter 1/10: ladvise speed: 0.466618
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.495622
Iter 2/10: OSS cache speed: 0.480235
Iter 2/10: ladvise speed: 0.39035
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.471319
Iter 3/10: OSS cache speed: 0.474721
Iter 3/10: ladvise speed: 0.479347
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.430498
Iter 4/10: OSS cache speed: 0.455294
Iter 4/10: ladvise speed: 0.44928
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.451422
Iter 5/10: OSS cache speed: 0.451143
Iter 5/10: ladvise speed: 0.447448
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.455914
Iter 6/10: OSS cache speed: 0.443848
Iter 6/10: ladvise speed: 0.459693
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.435754
Iter 7/10: OSS cache speed: 0.450205
Iter 7/10: ladvise speed: 0.462572
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.442173
Iter 8/10: OSS cache speed: 0.400538
Iter 8/10: ladvise speed: 0.438672
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.450811
Iter 9/10: OSS cache speed: 0.428106
Iter 9/10: ladvise speed: 0.436433
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.453852
Iter 10/10: OSS cache speed: 0.416219
Iter 10/10: ladvise speed: 0.404783
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