== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:37:00 (1746142620)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.58635 s, 22.9 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-ffff8800b5d0a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.948194
Iter 1/10: OSS cache speed: 1.08404
Iter 1/10: ladvise speed: 1.07644
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.952178
Iter 2/10: OSS cache speed: 0.987128
Iter 2/10: ladvise speed: 0.975385
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.795714
Iter 3/10: OSS cache speed: 0.82707
Iter 3/10: ladvise speed: 0.944288
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.804248
Iter 4/10: OSS cache speed: 0.864057
Iter 4/10: ladvise speed: 0.854971
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.863177
Iter 5/10: OSS cache speed: 0.864088
Iter 5/10: ladvise speed: 0.928967
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.836588
Iter 6/10: OSS cache speed: 1.05218
Iter 6/10: ladvise speed: 1.0885
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.992559
Iter 7/10: OSS cache speed: 1.07391
Iter 7/10: ladvise speed: 0.875609
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.816563
Iter 8/10: OSS cache speed: 0.957863
Iter 8/10: ladvise speed: 1.08818
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.905361
Iter 9/10: OSS cache speed: 1.01157
Iter 9/10: ladvise speed: 1.24935
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.06979
Iter 10/10: OSS cache speed: 1.1754
Iter 10/10: ladvise speed: 1.19986
Average uncached read: .89
Average speedup with OSS cached read:  .98 = +10%
Average speedup with ladvise willread:  1.02 = +14%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0