== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:48:42 (1756676922)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.35314 s, 16.5 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-ffff9a1258731800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.37692
Iter 1/10: OSS cache speed: 2.6108
Iter 1/10: ladvise speed: 2.61831
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.43112
Iter 2/10: OSS cache speed: 2.19747
Iter 2/10: ladvise speed: 2.23016
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.30261
Iter 3/10: OSS cache speed: 2.53906
Iter 3/10: ladvise speed: 2.32278
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.27594
Iter 4/10: OSS cache speed: 2.4175
Iter 4/10: ladvise speed: 2.55022
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.328
Iter 5/10: OSS cache speed: 2.38888
Iter 5/10: ladvise speed: 2.08208
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.25066
Iter 6/10: OSS cache speed: 2.43816
Iter 6/10: ladvise speed: 2.25806
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.33822
Iter 7/10: OSS cache speed: 2.61462
Iter 7/10: ladvise speed: 2.63487
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.40879
Iter 8/10: OSS cache speed: 2.68264
Iter 8/10: ladvise speed: 2.62935
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.97306
Iter 9/10: OSS cache speed: 2.54397
Iter 9/10: ladvise speed: 2.5095
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.3547
Iter 10/10: OSS cache speed: 2.42042
Iter 10/10: ladvise speed: 2.53847
Average uncached read: 2.30
Average speedup with OSS cached read:  2.48 = +7%
Average speedup with ladvise willread:  2.43 = +5%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0