== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:57:46 (1786312666)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.0314 s, 8.0 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-ffff9852a002a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.354246
Iter 1/10: OSS cache speed: 0.38449
Iter 1/10: ladvise speed: 0.403723
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.387548
Iter 2/10: OSS cache speed: 0.392948
Iter 2/10: ladvise speed: 0.409217
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.465241
Iter 3/10: OSS cache speed: 0.419837
Iter 3/10: ladvise speed: 0.364028
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.382132
Iter 4/10: OSS cache speed: 0.429288
Iter 4/10: ladvise speed: 0.414657
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.365698
Iter 5/10: OSS cache speed: 0.341191
Iter 5/10: ladvise speed: 0.440929
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.354866
Iter 6/10: OSS cache speed: 0.389719
Iter 6/10: ladvise speed: 0.372266
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.42082
Iter 7/10: OSS cache speed: 0.409849
Iter 7/10: ladvise speed: 0.412102
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.334763
Iter 8/10: OSS cache speed: 0.379871
Iter 8/10: ladvise speed: 0.349336
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.313016
Iter 9/10: OSS cache speed: 0.397831
Iter 9/10: ladvise speed: 0.288788
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.307737
Iter 10/10: OSS cache speed: 0.446145
Iter 10/10: ladvise speed: 0.356745
Average uncached read: .36
Average speedup with OSS cached read:  .39 = +8%
Average speedup with ladvise willread:  .38 = +5%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0