== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:13:08 (1787749988)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.0584 s, 8.0 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-ffff8a3ecbc87800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.303382
Iter 1/10: OSS cache speed: 0.300453
Iter 1/10: ladvise speed: 0.355644
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.400468
Iter 2/10: OSS cache speed: 0.346148
Iter 2/10: ladvise speed: 0.328294
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.339338
Iter 3/10: OSS cache speed: 0.320562
Iter 3/10: ladvise speed: 0.354543
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.396761
Iter 4/10: OSS cache speed: 0.31403
Iter 4/10: ladvise speed: 0.341461
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.350267
Iter 5/10: OSS cache speed: 0.315188
Iter 5/10: ladvise speed: 0.374048
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.33116
Iter 6/10: OSS cache speed: 0.358497
Iter 6/10: ladvise speed: 0.355162
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.429284
Iter 7/10: OSS cache speed: 0.370801
Iter 7/10: ladvise speed: 0.426568
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.376002
Iter 8/10: OSS cache speed: 0.421672
Iter 8/10: ladvise speed: 0.360445
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.347649
Iter 9/10: OSS cache speed: 0.426357
Iter 9/10: ladvise speed: 0.389493
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.348898
Iter 10/10: OSS cache speed: 0.372099
Iter 10/10: ladvise speed: 0.393208
Average uncached read: .36
Average speedup with OSS cached read:  .35 = +-2%
Average speedup with ladvise willread:  .36 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0