== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:36:22 (1763343382)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.7447 s, 9.8 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-ffff90e8c2e3e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.42837
Iter 1/10: OSS cache speed: 0.485944
Iter 1/10: ladvise speed: 0.478136
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.47843
Iter 2/10: OSS cache speed: 0.519663
Iter 2/10: ladvise speed: 0.481685
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.521437
Iter 3/10: OSS cache speed: 0.583986
Iter 3/10: ladvise speed: 0.501133
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.438527
Iter 4/10: OSS cache speed: 0.486086
Iter 4/10: ladvise speed: 0.553136
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.454102
Iter 5/10: OSS cache speed: 0.496793
Iter 5/10: ladvise speed: 0.542733
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.438367
Iter 6/10: OSS cache speed: 0.537968
Iter 6/10: ladvise speed: 0.541608
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.397581
Iter 7/10: OSS cache speed: 0.519444
Iter 7/10: ladvise speed: 0.44976
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.458678
Iter 8/10: OSS cache speed: 0.555429
Iter 8/10: ladvise speed: 0.49722
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.469806
Iter 9/10: OSS cache speed: 0.523021
Iter 9/10: ladvise speed: 0.540229
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.492686
Iter 10/10: OSS cache speed: 0.530021
Iter 10/10: ladvise speed: 0.537478
Average uncached read: .45
Average speedup with OSS cached read:  .52 = +15%
Average speedup with ladvise willread:  .51 = +13%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0