== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:10:24 (1788603024)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.0096 s, 8.1 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-ffff8ee08315b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.462374
Iter 1/10: OSS cache speed: 0.458674
Iter 1/10: ladvise speed: 0.468301
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.453411
Iter 2/10: OSS cache speed: 0.425752
Iter 2/10: ladvise speed: 0.411672
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.412746
Iter 3/10: OSS cache speed: 0.46937
Iter 3/10: ladvise speed: 0.404962
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.445951
Iter 4/10: OSS cache speed: 0.429477
Iter 4/10: ladvise speed: 0.385067
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.432453
Iter 5/10: OSS cache speed: 0.405905
Iter 5/10: ladvise speed: 0.392162
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.370823
Iter 6/10: OSS cache speed: 0.421131
Iter 6/10: ladvise speed: 0.342937
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.369801
Iter 7/10: OSS cache speed: 0.350759
Iter 7/10: ladvise speed: 0.431374
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.394
Iter 8/10: OSS cache speed: 0.402171
Iter 8/10: ladvise speed: 0.316991
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.323878
Iter 9/10: OSS cache speed: 0.365366
Iter 9/10: ladvise speed: 0.38751
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.310119
Iter 10/10: OSS cache speed: 0.344252
Iter 10/10: ladvise speed: 0.352909
Average uncached read: .39
Average speedup with OSS cached read:  .40 = +2%
Average speedup with ladvise willread:  .38 = +-2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0