== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:44:05 (1778618645)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.0395 s, 9.5 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-ffff913d46479800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.332246
Iter 1/10: OSS cache speed: 0.334698
Iter 1/10: ladvise speed: 0.436353
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.278874
Iter 2/10: OSS cache speed: 0.31766
Iter 2/10: ladvise speed: 0.374475
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.405603
Iter 3/10: OSS cache speed: 0.405894
Iter 3/10: ladvise speed: 0.319811
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.356961
Iter 4/10: OSS cache speed: 0.395116
Iter 4/10: ladvise speed: 0.409821
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.370375
Iter 5/10: OSS cache speed: 0.320961
Iter 5/10: ladvise speed: 0.369754
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.335768
Iter 6/10: OSS cache speed: 0.362354
Iter 6/10: ladvise speed: 0.36977
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.326605
Iter 7/10: OSS cache speed: 0.317633
Iter 7/10: ladvise speed: 0.392487
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.364792
Iter 8/10: OSS cache speed: 0.413627
Iter 8/10: ladvise speed: 0.436439
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.42997
Iter 9/10: OSS cache speed: 0.38588
Iter 9/10: ladvise speed: 0.392781
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.446201
Iter 10/10: OSS cache speed: 0.319573
Iter 10/10: ladvise speed: 0.369723
Average uncached read: .36
Average speedup with OSS cached read:  .35 = +-2%
Average speedup with ladvise willread:  .38 = +5%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0