== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:28:54 (1744129734)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.23364 s, 32.4 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-ffff88012a69e000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.10122
Iter 1/10: OSS cache speed: 2.38843
Iter 1/10: ladvise speed: 2.6119
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.55039
Iter 2/10: OSS cache speed: 2.72024
Iter 2/10: ladvise speed: 2.73247
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.69207
Iter 3/10: OSS cache speed: 2.77194
Iter 3/10: ladvise speed: 2.81378
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.7407
Iter 4/10: OSS cache speed: 2.34114
Iter 4/10: ladvise speed: 2.52506
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.5019
Iter 5/10: OSS cache speed: 2.57847
Iter 5/10: ladvise speed: 2.63355
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.72977
Iter 6/10: OSS cache speed: 2.58999
Iter 6/10: ladvise speed: 2.71124
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.60638
Iter 7/10: OSS cache speed: 2.51373
Iter 7/10: ladvise speed: 2.60765
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.55715
Iter 8/10: OSS cache speed: 2.28083
Iter 8/10: ladvise speed: 2.62158
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.66537
Iter 9/10: OSS cache speed: 2.37243
Iter 9/10: ladvise speed: 2.53416
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.45937
Iter 10/10: OSS cache speed: 2.64717
Iter 10/10: ladvise speed: 2.46949
Average uncached read: 2.56
Average speedup with OSS cached read:  2.52 = +-1%
Average speedup with ladvise willread:  2.62 = +2%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0