== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:32:18 (1790742738)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.7412 s, 8.2 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-ffff94f54839f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.325388
Iter 1/10: OSS cache speed: 0.320499
Iter 1/10: ladvise speed: 0.369106
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.36634
Iter 2/10: OSS cache speed: 0.395788
Iter 2/10: ladvise speed: 0.385127
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.404475
Iter 3/10: OSS cache speed: 0.445279
Iter 3/10: ladvise speed: 0.393014
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.404423
Iter 4/10: OSS cache speed: 0.379042
Iter 4/10: ladvise speed: 0.367882
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.408484
Iter 5/10: OSS cache speed: 0.382412
Iter 5/10: ladvise speed: 0.38868
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.405104
Iter 6/10: OSS cache speed: 0.502676
Iter 6/10: ladvise speed: 0.446568
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.407934
Iter 7/10: OSS cache speed: 0.421231
Iter 7/10: ladvise speed: 0.390762
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.476421
Iter 8/10: OSS cache speed: 0.397234
Iter 8/10: ladvise speed: 0.405696
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.417406
Iter 9/10: OSS cache speed: 0.418698
Iter 9/10: ladvise speed: 0.411967
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.367863
Iter 10/10: OSS cache speed: 0.412943
Iter 10/10: ladvise speed: 0.381808
Average uncached read: .39
Average speedup with OSS cached read:  .40 = +2%
Average speedup with ladvise willread:  .39 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0