== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:36:26 (1788536186)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.4066 s, 9.2 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-ffff891608528000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.409768
Iter 1/10: OSS cache speed: 0.404358
Iter 1/10: ladvise speed: 0.347827
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.450632
Iter 2/10: OSS cache speed: 0.398332
Iter 2/10: ladvise speed: 0.457514
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.383005
Iter 3/10: OSS cache speed: 0.408997
Iter 3/10: ladvise speed: 0.474273
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.366558
Iter 4/10: OSS cache speed: 0.413102
Iter 4/10: ladvise speed: 0.474713
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.485057
Iter 5/10: OSS cache speed: 0.470949
Iter 5/10: ladvise speed: 0.429073
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.500681
Iter 6/10: OSS cache speed: 0.492913
Iter 6/10: ladvise speed: 0.467496
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.384173
Iter 7/10: OSS cache speed: 0.473261
Iter 7/10: ladvise speed: 0.392822
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.382214
Iter 8/10: OSS cache speed: 0.431989
Iter 8/10: ladvise speed: 0.349279
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.412471
Iter 9/10: OSS cache speed: 0.468129
Iter 9/10: ladvise speed: 0.403089
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.430343
Iter 10/10: OSS cache speed: 0.44659
Iter 10/10: ladvise speed: 0.449108
Average uncached read: .42
Average speedup with OSS cached read:  .44 = +4%
Average speedup with ladvise willread:  .42 = +0%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0