== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:30:03 (1772177403)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.81352 s, 10.7 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-ffff8b4e04cb4800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.558299
Iter 1/10: OSS cache speed: 0.573161
Iter 1/10: ladvise speed: 0.650041
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.571151
Iter 2/10: OSS cache speed: 0.652857
Iter 2/10: ladvise speed: 0.690925
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.602953
Iter 3/10: OSS cache speed: 0.686229
Iter 3/10: ladvise speed: 0.681419
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.586214
Iter 4/10: OSS cache speed: 0.645733
Iter 4/10: ladvise speed: 0.67371
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.607053
Iter 5/10: OSS cache speed: 0.716152
Iter 5/10: ladvise speed: 0.742074
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.673233
Iter 6/10: OSS cache speed: 0.807713
Iter 6/10: ladvise speed: 0.789281
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.691049
Iter 7/10: OSS cache speed: 0.800282
Iter 7/10: ladvise speed: 0.817316
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.775724
Iter 8/10: OSS cache speed: 1.0185
Iter 8/10: ladvise speed: 1.22924
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.919719
Iter 9/10: OSS cache speed: 1.18122
Iter 9/10: ladvise speed: 1.05553
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.1753
Iter 10/10: OSS cache speed: 1.38375
Iter 10/10: ladvise speed: 1.08757
Average uncached read: .71
Average speedup with OSS cached read:  .84 = +18%
Average speedup with ladvise willread:  .84 = +18%
Speedup with OSS cached read less than 20%,  got 18%. Skipping ladvise willread check.
fail_loc=0