== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:00:27 (1789138827)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.3209 s, 7.9 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-ffff94db91c13800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.314088
Iter 1/10: OSS cache speed: 0.345277
Iter 1/10: ladvise speed: 0.334484
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.339414
Iter 2/10: OSS cache speed: 0.42453
Iter 2/10: ladvise speed: 0.414557
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.32837
Iter 3/10: OSS cache speed: 0.442704
Iter 3/10: ladvise speed: 0.312902
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.445043
Iter 4/10: OSS cache speed: 0.462456
Iter 4/10: ladvise speed: 0.454078
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.403945
Iter 5/10: OSS cache speed: 0.449626
Iter 5/10: ladvise speed: 0.391408
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.471799
Iter 6/10: OSS cache speed: 0.444799
Iter 6/10: ladvise speed: 0.421292
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.454085
Iter 7/10: OSS cache speed: 0.420082
Iter 7/10: ladvise speed: 0.411347
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.362966
Iter 8/10: OSS cache speed: 0.421624
Iter 8/10: ladvise speed: 0.427946
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.341841
Iter 9/10: OSS cache speed: 0.419011
Iter 9/10: ladvise speed: 0.426326
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.375037
Iter 10/10: OSS cache speed: 0.365964
Iter 10/10: ladvise speed: 0.473868
Average uncached read: .38
Average speedup with OSS cached read:  .41 = +7%
Average speedup with ladvise willread:  .40 = +5%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0