== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:51:50 (1787737910)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.7372 s, 7.6 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-ffff8f581072f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.385785
Iter 1/10: OSS cache speed: 0.441304
Iter 1/10: ladvise speed: 0.413871
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.397144
Iter 2/10: OSS cache speed: 0.428927
Iter 2/10: ladvise speed: 0.469403
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.397298
Iter 3/10: OSS cache speed: 0.451044
Iter 3/10: ladvise speed: 0.451806
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.402002
Iter 4/10: OSS cache speed: 0.425442
Iter 4/10: ladvise speed: 0.437608
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.424209
Iter 5/10: OSS cache speed: 0.42591
Iter 5/10: ladvise speed: 0.495349
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.425663
Iter 6/10: OSS cache speed: 0.500102
Iter 6/10: ladvise speed: 0.38411
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.401229
Iter 7/10: OSS cache speed: 0.44433
Iter 7/10: ladvise speed: 0.441535
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.413328
Iter 8/10: OSS cache speed: 0.393486
Iter 8/10: ladvise speed: 0.39526
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.418849
Iter 9/10: OSS cache speed: 0.438918
Iter 9/10: ladvise speed: 0.415119
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.363189
Iter 10/10: OSS cache speed: 0.386649
Iter 10/10: ladvise speed: 0.415985
Average uncached read: .40
Average speedup with OSS cached read:  .43 = +7%
Average speedup with ladvise willread:  .43 = +7%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0