== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:19:31 (1754407171)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.1967 s, 16.9 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-ffff9164852f0000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.16767
Iter 1/10: OSS cache speed: 1.18355
Iter 1/10: ladvise speed: 1.48662
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.54947
Iter 2/10: OSS cache speed: 1.47412
Iter 2/10: ladvise speed: 1.49996
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.37408
Iter 3/10: OSS cache speed: 1.58474
Iter 3/10: ladvise speed: 1.92445
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.93154
Iter 4/10: OSS cache speed: 1.99281
Iter 4/10: ladvise speed: 2.00008
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.57738
Iter 5/10: OSS cache speed: 0.885269
Iter 5/10: ladvise speed: 1.29476
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.3837
Iter 6/10: OSS cache speed: 1.72646
Iter 6/10: ladvise speed: 1.61885
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.99188
Iter 7/10: OSS cache speed: 1.9032
Iter 7/10: ladvise speed: 1.69256
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.56401
Iter 8/10: OSS cache speed: 1.87522
Iter 8/10: ladvise speed: 2.05409
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.12532
Iter 9/10: OSS cache speed: 2.04605
Iter 9/10: ladvise speed: 1.90025
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.03363
Iter 10/10: OSS cache speed: 1.97722
Iter 10/10: ladvise speed: 2.03252
Average uncached read: 1.66
Average speedup with OSS cached read:  1.66 = +0%
Average speedup with ladvise willread:  1.75 = +5%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0