== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:36:23 (1743528983)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.73912 s, 38.3 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-ffff8800b597c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.48948
Iter 1/10: OSS cache speed: 2.50862
Iter 1/10: ladvise speed: 2.63978
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.87078
Iter 2/10: OSS cache speed: 2.58058
Iter 2/10: ladvise speed: 2.60123
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.69128
Iter 3/10: OSS cache speed: 2.68592
Iter 3/10: ladvise speed: 2.53096
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.60997
Iter 4/10: OSS cache speed: 2.60541
Iter 4/10: ladvise speed: 2.58534
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.67794
Iter 5/10: OSS cache speed: 2.74172
Iter 5/10: ladvise speed: 2.68067
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.66101
Iter 6/10: OSS cache speed: 2.5831
Iter 6/10: ladvise speed: 2.58035
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.69367
Iter 7/10: OSS cache speed: 2.21941
Iter 7/10: ladvise speed: 2.39734
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.70264
Iter 8/10: OSS cache speed: 2.47328
Iter 8/10: ladvise speed: 2.75086
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.67851
Iter 9/10: OSS cache speed: 2.55008
Iter 9/10: ladvise speed: 2.12481
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.46304
Iter 10/10: OSS cache speed: 2.23137
Iter 10/10: ladvise speed: 2.37049
Average uncached read: 2.65
Average speedup with OSS cached read: 2.51 = +-5.28%
Average speedup with ladvise willread: 2.52 = +-4.90%
Speedup with OSS cached read less than 20%, got -5.28%. Skipping ladvise willread check.
fail_loc=0