== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:05:41 (1788465941)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.0757 s, 8.0 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-ffff9f340978a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.297873
Iter 1/10: OSS cache speed: 0.337902
Iter 1/10: ladvise speed: 0.35625
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.343098
Iter 2/10: OSS cache speed: 0.454296
Iter 2/10: ladvise speed: 0.406303
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.413718
Iter 3/10: OSS cache speed: 0.49008
Iter 3/10: ladvise speed: 0.497179
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.396426
Iter 4/10: OSS cache speed: 0.497475
Iter 4/10: ladvise speed: 0.521458
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.433525
Iter 5/10: OSS cache speed: 0.492298
Iter 5/10: ladvise speed: 0.541686
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.40602
Iter 6/10: OSS cache speed: 0.459666
Iter 6/10: ladvise speed: 0.528303
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.452472
Iter 7/10: OSS cache speed: 0.500054
Iter 7/10: ladvise speed: 0.52427
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.426001
Iter 8/10: OSS cache speed: 0.46495
Iter 8/10: ladvise speed: 0.475687
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.446531
Iter 9/10: OSS cache speed: 0.387254
Iter 9/10: ladvise speed: 0.400382
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.396394
Iter 10/10: OSS cache speed: 0.405145
Iter 10/10: ladvise speed: 0.408972
Average uncached read: .40
Average speedup with OSS cached read:  .44 = +10%
Average speedup with ladvise willread:  .46 = +15%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0