== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:32:55 (1784125975)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.71205 s, 15.6 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-ffff8b5ad18c1800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.803689
Iter 1/10: OSS cache speed: 0.92355
Iter 1/10: ladvise speed: 1.16133
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.907839
Iter 2/10: OSS cache speed: 1.13153
Iter 2/10: ladvise speed: 1.5835
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.30511
Iter 3/10: OSS cache speed: 1.47767
Iter 3/10: ladvise speed: 1.93585
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.63064
Iter 4/10: OSS cache speed: 1.9044
Iter 4/10: ladvise speed: 1.88354
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.15034
Iter 5/10: OSS cache speed: 1.98185
Iter 5/10: ladvise speed: 1.89122
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.8062
Iter 6/10: OSS cache speed: 1.74297
Iter 6/10: ladvise speed: 2.01911
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.803
Iter 7/10: OSS cache speed: 2.17683
Iter 7/10: ladvise speed: 2.16035
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.10034
Iter 8/10: OSS cache speed: 2.25659
Iter 8/10: ladvise speed: 2.24682
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.10294
Iter 9/10: OSS cache speed: 2.41018
Iter 9/10: ladvise speed: 2.49707
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.10217
Iter 10/10: OSS cache speed: 2.1238
Iter 10/10: ladvise speed: 2.16084
Average uncached read: 1.67
Average speedup with OSS cached read:  1.81 = +8%
Average speedup with ladvise willread:  1.95 = +16%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0