== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:47:38 (1789368458)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.28053 s, 14.4 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-ffff946282b41800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.31554
Iter 1/10: OSS cache speed: 1.87869
Iter 1/10: ladvise speed: 1.83487
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.8306
Iter 2/10: OSS cache speed: 2.1238
Iter 2/10: ladvise speed: 2.09815
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.73631
Iter 3/10: OSS cache speed: 2.34969
Iter 3/10: ladvise speed: 2.7283
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.46434
Iter 4/10: OSS cache speed: 2.75586
Iter 4/10: ladvise speed: 2.49504
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.42505
Iter 5/10: OSS cache speed: 2.6177
Iter 5/10: ladvise speed: 2.58451
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.48305
Iter 6/10: OSS cache speed: 2.57402
Iter 6/10: ladvise speed: 2.59832
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.366
Iter 7/10: OSS cache speed: 2.6187
Iter 7/10: ladvise speed: 2.55035
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.37689
Iter 8/10: OSS cache speed: 2.52368
Iter 8/10: ladvise speed: 2.62694
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.24318
Iter 9/10: OSS cache speed: 2.55996
Iter 9/10: ladvise speed: 2.54902
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.34154
Iter 10/10: OSS cache speed: 2.4781
Iter 10/10: ladvise speed: 2.56537
Average uncached read: 2.15
Average speedup with OSS cached read:  2.44 = +13%
Average speedup with ladvise willread:  2.46 = +14%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0