== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:07:13 (1780384033)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.861 s, 7.1 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-ffff9c7d85280800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.346441
Iter 1/10: OSS cache speed: 0.351165
Iter 1/10: ladvise speed: 0.319629
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.372693
Iter 2/10: OSS cache speed: 0.363142
Iter 2/10: ladvise speed: 0.383866
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.380464
Iter 3/10: OSS cache speed: 0.397334
Iter 3/10: ladvise speed: 0.449102
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.442136
Iter 4/10: OSS cache speed: 0.430756
Iter 4/10: ladvise speed: 0.439343
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.432461
Iter 5/10: OSS cache speed: 0.430068
Iter 5/10: ladvise speed: 0.440976
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.469357
Iter 6/10: OSS cache speed: 0.475091
Iter 6/10: ladvise speed: 0.453757
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.210134
Iter 7/10: OSS cache speed: 0.315088
Iter 7/10: ladvise speed: 0.36865
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.358868
Iter 8/10: OSS cache speed: 0.344413
Iter 8/10: ladvise speed: 0.37536
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.39284
Iter 9/10: OSS cache speed: 0.43746
Iter 9/10: ladvise speed: 0.45479
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.48662
Iter 10/10: OSS cache speed: 0.461816
Iter 10/10: ladvise speed: 0.50159
Average uncached read: .38
Average speedup with OSS cached read:  .40 = +5%
Average speedup with ladvise willread:  .41 = +7%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0