== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:28:39 (1746127719)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 5.65357 s, 18.5 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-ffff8800b607a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.735858
Iter 1/10: OSS cache speed: 0.804654
Iter 1/10: ladvise speed: 0.704677
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.605267
Iter 2/10: OSS cache speed: 0.724379
Iter 2/10: ladvise speed: 0.857137
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.561424
Iter 3/10: OSS cache speed: 0.589433
Iter 3/10: ladvise speed: 0.812482
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.695566
Iter 4/10: OSS cache speed: 0.80988
Iter 4/10: ladvise speed: 0.802607
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.651597
Iter 5/10: OSS cache speed: 0.672104
Iter 5/10: ladvise speed: 0.614252
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.503285
Iter 6/10: OSS cache speed: 0.560552
Iter 6/10: ladvise speed: 0.64369
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.518701
Iter 7/10: OSS cache speed: 0.769048
Iter 7/10: ladvise speed: 0.883578
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.757062
Iter 8/10: OSS cache speed: 0.828887
Iter 8/10: ladvise speed: 1.00661
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.894948
Iter 9/10: OSS cache speed: 1.01482
Iter 9/10: ladvise speed: 1.01785
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.862636
Iter 10/10: OSS cache speed: 0.841175
Iter 10/10: ladvise speed: 0.906081
Average uncached read: .67
Average speedup with OSS cached read:  .76 = +13%
Average speedup with ladvise willread:  .82 = +22%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0