== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:42:06 (1788392526)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.23021 s, 16.8 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-ffff8ad682cc0000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.09881
Iter 1/10: OSS cache speed: 1.14439
Iter 1/10: ladvise speed: 1.22589
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.551024
Iter 2/10: OSS cache speed: 0.558237
Iter 2/10: ladvise speed: 0.64323
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.706794
Iter 3/10: OSS cache speed: 0.456649
Iter 3/10: ladvise speed: 0.283825
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.433078
Iter 4/10: OSS cache speed: 0.435378
Iter 4/10: ladvise speed: 0.40543
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.431056
Iter 5/10: OSS cache speed: 0.450443
Iter 5/10: ladvise speed: 0.406876
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.414941
Iter 6/10: OSS cache speed: 0.443881
Iter 6/10: ladvise speed: 0.446291
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.385409
Iter 7/10: OSS cache speed: 0.405772
Iter 7/10: ladvise speed: 0.37991
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.386897
Iter 8/10: OSS cache speed: 0.403428
Iter 8/10: ladvise speed: 0.433787
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.440383
Iter 9/10: OSS cache speed: 0.432743
Iter 9/10: ladvise speed: 0.423509
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.386183
Iter 10/10: OSS cache speed: 0.451405
Iter 10/10: ladvise speed: 0.448678
Average uncached read: .52
Average speedup with OSS cached read:  .51 = +-1%
Average speedup with ladvise willread:  .50 = +-3%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0