== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:13:24 (1782483204)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.47197 s, 12.4 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-ffff93fe88036800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.521817
Iter 1/10: OSS cache speed: 0.548874
Iter 1/10: ladvise speed: 0.618822
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.592719
Iter 2/10: OSS cache speed: 0.588134
Iter 2/10: ladvise speed: 0.641249
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.749713
Iter 3/10: OSS cache speed: 0.833607
Iter 3/10: ladvise speed: 0.708006
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.734423
Iter 4/10: OSS cache speed: 0.768901
Iter 4/10: ladvise speed: 0.887905
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.69308
Iter 5/10: OSS cache speed: 0.806321
Iter 5/10: ladvise speed: 0.60058
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.636201
Iter 6/10: OSS cache speed: 0.346732
Iter 6/10: ladvise speed: 0.361823
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.404967
Iter 7/10: OSS cache speed: 0.438025
Iter 7/10: ladvise speed: 0.411389
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.618809
Iter 8/10: OSS cache speed: 0.599482
Iter 8/10: ladvise speed: 0.607148
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.329132
Iter 9/10: OSS cache speed: 0.480414
Iter 9/10: ladvise speed: 0.493327
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.52964
Iter 10/10: OSS cache speed: 0.500069
Iter 10/10: ladvise speed: 0.527591
Average uncached read: .68
Average speedup with OSS cached read:  .59 = +-13%
Average speedup with ladvise willread:  .58 = +-14%
Speedup with OSS cached read less than 20%,  got -13%. Skipping ladvise willread check.
fail_loc=0