== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:50:59 (1749541859)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.57929 s, 40.7 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-ffff8800b669a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.77205
Iter 1/10: OSS cache speed: 2.79574
Iter 1/10: ladvise speed: 2.7681
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.6487
Iter 2/10: OSS cache speed: 2.65878
Iter 2/10: ladvise speed: 2.71243
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.74892
Iter 3/10: OSS cache speed: 2.80776
Iter 3/10: ladvise speed: 2.58641
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.84111
Iter 4/10: OSS cache speed: 2.88683
Iter 4/10: ladvise speed: 2.88079
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.06441
Iter 5/10: OSS cache speed: 2.48934
Iter 5/10: ladvise speed: 2.24471
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.55153
Iter 6/10: OSS cache speed: 2.79228
Iter 6/10: ladvise speed: 2.39299
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.72832
Iter 7/10: OSS cache speed: 2.54688
Iter 7/10: ladvise speed: 1.73427
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.97694
Iter 8/10: OSS cache speed: 2.15112
Iter 8/10: ladvise speed: 2.78631
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.85932
Iter 9/10: OSS cache speed: 2.81671
Iter 9/10: ladvise speed: 2.0607
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.99829
Iter 10/10: OSS cache speed: 1.84032
Iter 10/10: ladvise speed: 2.23213
Average uncached read: 2.51
Average speedup with OSS cached read:  2.57 = +2%
Average speedup with ladvise willread:  2.43 = +-3%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0