== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:31:03 (1775219463)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.8539 s, 8.2 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-ffff8b4120146800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.365339
Iter 1/10: OSS cache speed: 0.336286
Iter 1/10: ladvise speed: 0.392928
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.328847
Iter 2/10: OSS cache speed: 0.353621
Iter 2/10: ladvise speed: 0.329809
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.320871
Iter 3/10: OSS cache speed: 0.343773
Iter 3/10: ladvise speed: 0.427359
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.371511
Iter 4/10: OSS cache speed: 0.419279
Iter 4/10: ladvise speed: 0.465892
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.389942
Iter 5/10: OSS cache speed: 0.462846
Iter 5/10: ladvise speed: 0.484928
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.440661
Iter 6/10: OSS cache speed: 0.483195
Iter 6/10: ladvise speed: 0.522879
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.472512
Iter 7/10: OSS cache speed: 0.557757
Iter 7/10: ladvise speed: 0.667629
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.617694
Iter 8/10: OSS cache speed: 0.730197
Iter 8/10: ladvise speed: 0.908639
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.721962
Iter 9/10: OSS cache speed: 0.795747
Iter 9/10: ladvise speed: 0.796915
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.605768
Iter 10/10: OSS cache speed: 1.03709
Iter 10/10: ladvise speed: 0.906786
Average uncached read: .46
Average speedup with OSS cached read:  .55 = +19%
Average speedup with ladvise willread:  .59 = +28%
Speedup with OSS cached read less than 20%,  got 19%. Skipping ladvise willread check.
fail_loc=0