== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:19:59 (1782487199)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.93623 s, 17.7 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-ffff945747a2e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.45284
Iter 1/10: OSS cache speed: 1.19604
Iter 1/10: ladvise speed: 1.58033
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.50418
Iter 2/10: OSS cache speed: 1.81504
Iter 2/10: ladvise speed: 1.95678
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.98478
Iter 3/10: OSS cache speed: 1.8382
Iter 3/10: ladvise speed: 0.149912
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.277915
Iter 4/10: OSS cache speed: 0.470512
Iter 4/10: ladvise speed: 0.409634
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.38244
Iter 5/10: OSS cache speed: 0.4227
Iter 5/10: ladvise speed: 0.401295
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.330482
Iter 6/10: OSS cache speed: 0.380357
Iter 6/10: ladvise speed: 0.377534
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.668562
Iter 7/10: OSS cache speed: 1.50361
Iter 7/10: ladvise speed: 2.10313
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.08111
Iter 8/10: OSS cache speed: 1.0692
Iter 8/10: ladvise speed: 0.641082
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.681448
Iter 9/10: OSS cache speed: 0.65528
Iter 9/10: ladvise speed: 0.65805
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.24113
Iter 10/10: OSS cache speed: 0.359663
Iter 10/10: ladvise speed: 0.35164
Average uncached read: .96
Average speedup with OSS cached read:  .97 = +1%
Average speedup with ladvise willread:  .86 = +-10%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0