== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:03:32 (1788563012)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.8374 s, 10.7 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-ffff8c3548704000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.417319
Iter 1/10: OSS cache speed: 0.339396
Iter 1/10: ladvise speed: 0.382499
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.365165
Iter 2/10: OSS cache speed: 0.444031
Iter 2/10: ladvise speed: 0.394731
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.396975
Iter 3/10: OSS cache speed: 0.356511
Iter 3/10: ladvise speed: 0.368173
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.390703
Iter 4/10: OSS cache speed: 0.290404
Iter 4/10: ladvise speed: 0.443214
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.460658
Iter 5/10: OSS cache speed: 0.492016
Iter 5/10: ladvise speed: 0.445319
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.465777
Iter 6/10: OSS cache speed: 0.528369
Iter 6/10: ladvise speed: 0.366669
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.377539
Iter 7/10: OSS cache speed: 0.357261
Iter 7/10: ladvise speed: 0.435301
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.463594
Iter 8/10: OSS cache speed: 0.44174
Iter 8/10: ladvise speed: 0.531105
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.510379
Iter 9/10: OSS cache speed: 0.512772
Iter 9/10: ladvise speed: 0.486585
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.486693
Iter 10/10: OSS cache speed: 0.406804
Iter 10/10: ladvise speed: 0.485875
Average uncached read: .43
Average speedup with OSS cached read:  .41 = +-4%
Average speedup with ladvise willread:  .43 = +0%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0