== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:45:00 (1789357500)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.05142 s, 17.3 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-ffff9dfb44b47800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.02407
Iter 1/10: OSS cache speed: 0.841462
Iter 1/10: ladvise speed: 0.72205
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.733837
Iter 2/10: OSS cache speed: 0.73575
Iter 2/10: ladvise speed: 0.82552
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.88878
Iter 3/10: OSS cache speed: 0.83783
Iter 3/10: ladvise speed: 0.959494
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.25293
Iter 4/10: OSS cache speed: 1.27763
Iter 4/10: ladvise speed: 1.33228
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.61554
Iter 5/10: OSS cache speed: 1.41096
Iter 5/10: ladvise speed: 1.50727
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.37354
Iter 6/10: OSS cache speed: 1.30116
Iter 6/10: ladvise speed: 1.82577
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.08008
Iter 7/10: OSS cache speed: 2.05229
Iter 7/10: ladvise speed: 2.2765
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.20112
Iter 8/10: OSS cache speed: 2.04535
Iter 8/10: ladvise speed: 1.91979
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.05628
Iter 9/10: OSS cache speed: 2.00705
Iter 9/10: ladvise speed: 2.10167
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.2792
Iter 10/10: OSS cache speed: 2.14731
Iter 10/10: ladvise speed: 2.26772
Average uncached read: 1.55
Average speedup with OSS cached read:  1.46 = +-5%
Average speedup with ladvise willread:  1.57 = +1%
Speedup with OSS cached read less than 20%,  got -5%. Skipping ladvise willread check.
fail_loc=0