== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:44:02 (1746146642)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 5.43844 s, 19.3 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-ffff88012a67a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.543956
Iter 1/10: OSS cache speed: 0.555923
Iter 1/10: ladvise speed: 0.516559
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.521
Iter 2/10: OSS cache speed: 0.520064
Iter 2/10: ladvise speed: 0.488714
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.471501
Iter 3/10: OSS cache speed: 0.415828
Iter 3/10: ladvise speed: 0.446738
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.416775
Iter 4/10: OSS cache speed: 0.438064
Iter 4/10: ladvise speed: 0.427506
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.438147
Iter 5/10: OSS cache speed: 0.482879
Iter 5/10: ladvise speed: 0.512177
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.508049
Iter 6/10: OSS cache speed: 0.500503
Iter 6/10: ladvise speed: 0.491468
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.490861
Iter 7/10: OSS cache speed: 0.500426
Iter 7/10: ladvise speed: 0.49279
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.460231
Iter 8/10: OSS cache speed: 0.469358
Iter 8/10: ladvise speed: 0.484112
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.484331
Iter 9/10: OSS cache speed: 0.481285
Iter 9/10: ladvise speed: 0.467442
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.488567
Iter 10/10: OSS cache speed: 0.455043
Iter 10/10: ladvise speed: 0.460289
Average uncached read: .48
Average speedup with OSS cached read:  .48 = +0%
Average speedup with ladvise willread:  .47 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0