== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:36:38 (1790775398)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.8114 s, 8.9 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-ffff9c361064a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.365408
Iter 1/10: OSS cache speed: 0.334337
Iter 1/10: ladvise speed: 0.394513
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.372712
Iter 2/10: OSS cache speed: 0.345869
Iter 2/10: ladvise speed: 0.324984
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.355667
Iter 3/10: OSS cache speed: 0.344752
Iter 3/10: ladvise speed: 0.33224
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.364599
Iter 4/10: OSS cache speed: 0.352521
Iter 4/10: ladvise speed: 0.367076
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.375278
Iter 5/10: OSS cache speed: 0.330564
Iter 5/10: ladvise speed: 0.347733
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.283494
Iter 6/10: OSS cache speed: 0.341736
Iter 6/10: ladvise speed: 0.327416
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.338832
Iter 7/10: OSS cache speed: 0.325654
Iter 7/10: ladvise speed: 0.344082
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.346014
Iter 8/10: OSS cache speed: 0.338119
Iter 8/10: ladvise speed: 0.321948
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.357811
Iter 9/10: OSS cache speed: 0.368274
Iter 9/10: ladvise speed: 0.394421
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.399139
Iter 10/10: OSS cache speed: 0.392994
Iter 10/10: ladvise speed: 0.356542
Average uncached read: .35
Average speedup with OSS cached read:  .34 = +-2%
Average speedup with ladvise willread:  .35 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0