== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:18:32 (1772471912)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.0175 s, 7.0 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-ffff95b506061800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.314945
Iter 1/10: OSS cache speed: 0.317704
Iter 1/10: ladvise speed: 0.33723
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.317153
Iter 2/10: OSS cache speed: 0.338793
Iter 2/10: ladvise speed: 0.294824
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.301217
Iter 3/10: OSS cache speed: 0.320957
Iter 3/10: ladvise speed: 0.368509
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.319844
Iter 4/10: OSS cache speed: 0.376892
Iter 4/10: ladvise speed: 0.328084
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.320223
Iter 5/10: OSS cache speed: 0.297306
Iter 5/10: ladvise speed: 0.284464
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.314483
Iter 6/10: OSS cache speed: 0.286912
Iter 6/10: ladvise speed: 0.305139
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.235476
Iter 7/10: OSS cache speed: 0.360967
Iter 7/10: ladvise speed: 0.354985
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.397199
Iter 8/10: OSS cache speed: 0.477092
Iter 8/10: ladvise speed: 0.607563
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.511681
Iter 9/10: OSS cache speed: 0.591585
Iter 9/10: ladvise speed: 0.628233
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.576654
Iter 10/10: OSS cache speed: 0.582544
Iter 10/10: ladvise speed: 0.606087
Average uncached read: .36
Average speedup with OSS cached read:  .39 = +8%
Average speedup with ladvise willread:  .41 = +13%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0