== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:58:11 (1770436691)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.84812 s, 17.9 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-ffff8dffc87f1000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.18332
Iter 1/10: OSS cache speed: 1.6426
Iter 1/10: ladvise speed: 1.84016
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.14185
Iter 2/10: OSS cache speed: 2.09196
Iter 2/10: ladvise speed: 1.81691
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.60822
Iter 3/10: OSS cache speed: 1.84669
Iter 3/10: ladvise speed: 2.33953
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.87547
Iter 4/10: OSS cache speed: 2.17861
Iter 4/10: ladvise speed: 2.16001
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.17252
Iter 5/10: OSS cache speed: 2.12473
Iter 5/10: ladvise speed: 2.0931
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.0719
Iter 6/10: OSS cache speed: 2.11162
Iter 6/10: ladvise speed: 2.14072
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.16304
Iter 7/10: OSS cache speed: 2.22251
Iter 7/10: ladvise speed: 2.21812
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.74814
Iter 8/10: OSS cache speed: 1.8564
Iter 8/10: ladvise speed: 1.31308
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.91838
Iter 9/10: OSS cache speed: 1.95847
Iter 9/10: ladvise speed: 2.09737
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.93706
Iter 10/10: OSS cache speed: 2.13457
Iter 10/10: ladvise speed: 2.16211
Average uncached read: 1.88
Average speedup with OSS cached read:  2.01 = +6%
Average speedup with ladvise willread:  2.01 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0