== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:25:47 (1744046747)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.53027 s, 41.4 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-ffff88012aa6d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.96614
Iter 1/10: OSS cache speed: 3.27771
Iter 1/10: ladvise speed: 3.21389
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.90799
Iter 2/10: OSS cache speed: 3.37285
Iter 2/10: ladvise speed: 3.38583
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.77885
Iter 3/10: OSS cache speed: 3.23921
Iter 3/10: ladvise speed: 3.27141
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.90582
Iter 4/10: OSS cache speed: 3.24586
Iter 4/10: ladvise speed: 3.22896
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.45497
Iter 5/10: OSS cache speed: 3.29291
Iter 5/10: ladvise speed: 3.3336
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.61533
Iter 6/10: OSS cache speed: 3.28955
Iter 6/10: ladvise speed: 3.26774
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.13147
Iter 7/10: OSS cache speed: 2.40314
Iter 7/10: ladvise speed: 3.0019
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.89593
Iter 8/10: OSS cache speed: 3.40976
Iter 8/10: ladvise speed: 3.36843
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 3.00886
Iter 9/10: OSS cache speed: 3.40144
Iter 9/10: ladvise speed: 3.37808
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 3.03097
Iter 10/10: OSS cache speed: 3.47437
Iter 10/10: ladvise speed: 2.62017
Average uncached read: 2.76
Average speedup with OSS cached read:  3.24 = +17%
Average speedup with ladvise willread:  3.20 = +15%
Speedup with OSS cached read less than 20%,  got 17%. Skipping ladvise willread check.
fail_loc=0