== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:41:23 (1788201683)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.9052 s, 8.1 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-ffff967d491a8000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.312475
Iter 1/10: OSS cache speed: 0.410919
Iter 1/10: ladvise speed: 0.382115
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.327334
Iter 2/10: OSS cache speed: 0.407419
Iter 2/10: ladvise speed: 0.368423
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.379141
Iter 3/10: OSS cache speed: 0.418619
Iter 3/10: ladvise speed: 0.45138
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.354492
Iter 4/10: OSS cache speed: 0.417128
Iter 4/10: ladvise speed: 0.433489
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.434726
Iter 5/10: OSS cache speed: 0.504875
Iter 5/10: ladvise speed: 0.471964
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.386404
Iter 6/10: OSS cache speed: 0.460247
Iter 6/10: ladvise speed: 0.361959
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.412865
Iter 7/10: OSS cache speed: 0.453429
Iter 7/10: ladvise speed: 0.452425
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.384279
Iter 8/10: OSS cache speed: 0.374856
Iter 8/10: ladvise speed: 0.361655
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.356702
Iter 9/10: OSS cache speed: 0.356888
Iter 9/10: ladvise speed: 0.42129
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.322412
Iter 10/10: OSS cache speed: 0.394159
Iter 10/10: ladvise speed: 0.39722
Average uncached read: .36
Average speedup with OSS cached read:  .41 = +13%
Average speedup with ladvise willread:  .41 = +13%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0