== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:08:18 (1787796498)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.2842 s, 7.9 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-ffff8f1b83a41000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.367768
Iter 1/10: OSS cache speed: 0.33802
Iter 1/10: ladvise speed: 0.318169
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.335153
Iter 2/10: OSS cache speed: 0.325688
Iter 2/10: ladvise speed: 0.308618
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.320714
Iter 3/10: OSS cache speed: 0.355023
Iter 3/10: ladvise speed: 0.326256
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.30473
Iter 4/10: OSS cache speed: 0.322183
Iter 4/10: ladvise speed: 0.356181
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.333456
Iter 5/10: OSS cache speed: 0.302509
Iter 5/10: ladvise speed: 0.30351
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.300762
Iter 6/10: OSS cache speed: 0.310739
Iter 6/10: ladvise speed: 0.340632
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.34325
Iter 7/10: OSS cache speed: 0.330979
Iter 7/10: ladvise speed: 0.337346
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.325722
Iter 8/10: OSS cache speed: 0.342144
Iter 8/10: ladvise speed: 0.36166
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.310709
Iter 9/10: OSS cache speed: 0.3439
Iter 9/10: ladvise speed: 0.346457
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.342528
Iter 10/10: OSS cache speed: 0.339677
Iter 10/10: ladvise speed: 0.346933
Average uncached read: .32
Average speedup with OSS cached read:  .33 = +3%
Average speedup with ladvise willread:  .33 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0