== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:22:44 (1783948964)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.3417 s, 8.5 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-ffff99b505959000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.436566
Iter 1/10: OSS cache speed: 0.44594
Iter 1/10: ladvise speed: 0.40447
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.408991
Iter 2/10: OSS cache speed: 0.463788
Iter 2/10: ladvise speed: 0.42722
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.400493
Iter 3/10: OSS cache speed: 0.411893
Iter 3/10: ladvise speed: 0.381542
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.392807
Iter 4/10: OSS cache speed: 0.408033
Iter 4/10: ladvise speed: 0.398742
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.29237
Iter 5/10: OSS cache speed: 0.37958
Iter 5/10: ladvise speed: 0.363986
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.324679
Iter 6/10: OSS cache speed: 0.330046
Iter 6/10: ladvise speed: 0.298325
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.38092
Iter 7/10: OSS cache speed: 0.279618
Iter 7/10: ladvise speed: 0.418891
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.408989
Iter 8/10: OSS cache speed: 0.500962
Iter 8/10: ladvise speed: 0.448338
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.400864
Iter 9/10: OSS cache speed: 0.375359
Iter 9/10: ladvise speed: 0.443909
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.434048
Iter 10/10: OSS cache speed: 0.474111
Iter 10/10: ladvise speed: 0.486206
Average uncached read: .38
Average speedup with OSS cached read:  .40 = +5%
Average speedup with ladvise willread:  .40 = +5%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0