== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:15:00 (1746130500)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.45598 s, 30.3 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-ffff88012a55d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.853981
Iter 1/10: OSS cache speed: 0.925625
Iter 1/10: ladvise speed: 1.05599
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.842243
Iter 2/10: OSS cache speed: 1.22209
Iter 2/10: ladvise speed: 1.19863
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.881796
Iter 3/10: OSS cache speed: 1.33529
Iter 3/10: ladvise speed: 1.1355
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.969792
Iter 4/10: OSS cache speed: 1.18485
Iter 4/10: ladvise speed: 1.03238
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.12792
Iter 5/10: OSS cache speed: 1.18939
Iter 5/10: ladvise speed: 0.886412
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.922597
Iter 6/10: OSS cache speed: 0.947899
Iter 6/10: ladvise speed: 0.843075
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.769436
Iter 7/10: OSS cache speed: 0.928319
Iter 7/10: ladvise speed: 0.906134
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.812307
Iter 8/10: OSS cache speed: 0.947853
Iter 8/10: ladvise speed: 0.915497
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.77767
Iter 9/10: OSS cache speed: 0.852854
Iter 9/10: ladvise speed: 0.807719
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.881596
Iter 10/10: OSS cache speed: 1.04295
Iter 10/10: ladvise speed: 0.923625
Average uncached read: .88
Average speedup with OSS cached read:  1.05 = +19%
Average speedup with ladvise willread:  .97 = +10%
Speedup with OSS cached read less than 20%,  got 19%. Skipping ladvise willread check.
fail_loc=0