== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:22:30 (1743204150)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.51703 s, 41.7 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-ffff8800b64b9000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.8795
Iter 1/10: OSS cache speed: 3.19078
Iter 1/10: ladvise speed: 3.14354
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.08596
Iter 2/10: OSS cache speed: 2.37069
Iter 2/10: ladvise speed: 3.02197
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.72763
Iter 3/10: OSS cache speed: 3.17532
Iter 3/10: ladvise speed: 3.06903
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.99178
Iter 4/10: OSS cache speed: 2.85571
Iter 4/10: ladvise speed: 2.15411
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.70966
Iter 5/10: OSS cache speed: 2.49619
Iter 5/10: ladvise speed: 3.21707
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.4182
Iter 6/10: OSS cache speed: 2.22083
Iter 6/10: ladvise speed: 2.08016
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.17842
Iter 7/10: OSS cache speed: 2.44015
Iter 7/10: ladvise speed: 2.66166
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.46623
Iter 8/10: OSS cache speed: 3.27879
Iter 8/10: ladvise speed: 3.23432
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.97386
Iter 9/10: OSS cache speed: 2.82535
Iter 9/10: ladvise speed: 2.19095
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.02499
Iter 10/10: OSS cache speed: 3.33163
Iter 10/10: ladvise speed: 2.82874
Average uncached read: 2.54
Average speedup with OSS cached read:  2.81 = +10%
Average speedup with ladvise willread:  2.76 = +8%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0