== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:22:35 (1746127355)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 7.29668 s, 14.4 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-ffff88012aa0a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.655529
Iter 1/10: OSS cache speed: 0.717645
Iter 1/10: ladvise speed: 0.720262
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.627337
Iter 2/10: OSS cache speed: 0.732206
Iter 2/10: ladvise speed: 0.754128
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.722599
Iter 3/10: OSS cache speed: 0.835003
Iter 3/10: ladvise speed: 0.85104
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.716138
Iter 4/10: OSS cache speed: 0.746036
Iter 4/10: ladvise speed: 0.671309
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.641869
Iter 5/10: OSS cache speed: 0.630145
Iter 5/10: ladvise speed: 0.651799
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.541276
Iter 6/10: OSS cache speed: 0.593854
Iter 6/10: ladvise speed: 0.541645
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.563369
Iter 7/10: OSS cache speed: 0.523231
Iter 7/10: ladvise speed: 0.63572
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.555292
Iter 8/10: OSS cache speed: 0.568992
Iter 8/10: ladvise speed: 0.550705
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.515227
Iter 9/10: OSS cache speed: 0.637252
Iter 9/10: ladvise speed: 0.617641
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.583647
Iter 10/10: OSS cache speed: 0.63163
Iter 10/10: ladvise speed: 0.609309
Average uncached read: .61
Average speedup with OSS cached read:  .66 = +8%
Average speedup with ladvise willread:  .66 = +8%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0