== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:23:51 (1777422231)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.34885 s, 16.5 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-ffff9d0185c42800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.27605
Iter 1/10: OSS cache speed: 1.27814
Iter 1/10: ladvise speed: 1.63432
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.46016
Iter 2/10: OSS cache speed: 1.77977
Iter 2/10: ladvise speed: 1.82013
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.39351
Iter 3/10: OSS cache speed: 1.54004
Iter 3/10: ladvise speed: 2.08698
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.86783
Iter 4/10: OSS cache speed: 2.24691
Iter 4/10: ladvise speed: 2.13179
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.99371
Iter 5/10: OSS cache speed: 2.05541
Iter 5/10: ladvise speed: 1.55302
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.77562
Iter 6/10: OSS cache speed: 1.17815
Iter 6/10: ladvise speed: 1.35237
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.44376
Iter 7/10: OSS cache speed: 1.52709
Iter 7/10: ladvise speed: 2.28414
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.02286
Iter 8/10: OSS cache speed: 1.80504
Iter 8/10: ladvise speed: 1.65092
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.73653
Iter 9/10: OSS cache speed: 1.87453
Iter 9/10: ladvise speed: 2.0954
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.07843
Iter 10/10: OSS cache speed: 2.14839
Iter 10/10: ladvise speed: 2.1814
Average uncached read: 1.60
Average speedup with OSS cached read:  1.74 = +8%
Average speedup with ladvise willread:  1.87 = +16%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0