== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:23:23 (1788668603)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.6986 s, 7.1 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-ffff8d1a0336d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.299748
Iter 1/10: OSS cache speed: 0.356077
Iter 1/10: ladvise speed: 0.38462
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.361924
Iter 2/10: OSS cache speed: 0.370981
Iter 2/10: ladvise speed: 0.39226
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.37379
Iter 3/10: OSS cache speed: 0.400711
Iter 3/10: ladvise speed: 0.376427
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.377518
Iter 4/10: OSS cache speed: 0.408336
Iter 4/10: ladvise speed: 0.405879
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.326545
Iter 5/10: OSS cache speed: 0.38803
Iter 5/10: ladvise speed: 0.358723
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.375993
Iter 6/10: OSS cache speed: 0.381237
Iter 6/10: ladvise speed: 0.343941
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.32341
Iter 7/10: OSS cache speed: 0.336486
Iter 7/10: ladvise speed: 0.337269
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.289
Iter 8/10: OSS cache speed: 0.391102
Iter 8/10: ladvise speed: 0.358006
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.323202
Iter 9/10: OSS cache speed: 0.334769
Iter 9/10: ladvise speed: 0.325302
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.312684
Iter 10/10: OSS cache speed: 0.343849
Iter 10/10: ladvise speed: 0.336406
Average uncached read: .33
Average speedup with OSS cached read:  .37 = +12%
Average speedup with ladvise willread:  .36 = +9%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0