== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:11:20 (1788815480)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.95587 s, 17.6 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-ffff996403eef000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.50728
Iter 1/10: OSS cache speed: 1.69899
Iter 1/10: ladvise speed: 1.92159
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.34034
Iter 2/10: OSS cache speed: 1.46538
Iter 2/10: ladvise speed: 1.85881
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.31276
Iter 3/10: OSS cache speed: 0.510725
Iter 3/10: ladvise speed: 0.672226
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.72361
Iter 4/10: OSS cache speed: 0.828749
Iter 4/10: ladvise speed: 0.829162
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.823785
Iter 5/10: OSS cache speed: 0.854815
Iter 5/10: ladvise speed: 0.858912
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.902375
Iter 6/10: OSS cache speed: 0.901445
Iter 6/10: ladvise speed: 0.922135
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.799233
Iter 7/10: OSS cache speed: 0.820902
Iter 7/10: ladvise speed: 0.892546
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.04135
Iter 8/10: OSS cache speed: 1.33402
Iter 8/10: ladvise speed: 1.49547
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.74961
Iter 9/10: OSS cache speed: 1.90284
Iter 9/10: ladvise speed: 0.835711
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.308553
Iter 10/10: OSS cache speed: 0.407495
Iter 10/10: ladvise speed: 0.459405
Average uncached read: 1.05
Average speedup with OSS cached read:  1.07 = +1%
Average speedup with ladvise willread:  1.07 = +1%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0