== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:44:39 (1782362679)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.32766 s, 16.6 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-ffff940060156000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.23637
Iter 1/10: OSS cache speed: 2.56887
Iter 1/10: ladvise speed: 2.31208
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.23378
Iter 2/10: OSS cache speed: 2.39837
Iter 2/10: ladvise speed: 2.42178
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.22273
Iter 3/10: OSS cache speed: 2.4162
Iter 3/10: ladvise speed: 2.34492
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.23144
Iter 4/10: OSS cache speed: 2.38448
Iter 4/10: ladvise speed: 2.33809
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.24549
Iter 5/10: OSS cache speed: 2.28072
Iter 5/10: ladvise speed: 2.36663
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.72857
Iter 6/10: OSS cache speed: 1.1676
Iter 6/10: ladvise speed: 1.28573
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.05196
Iter 7/10: OSS cache speed: 2.40119
Iter 7/10: ladvise speed: 2.49212
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.32076
Iter 8/10: OSS cache speed: 2.55362
Iter 8/10: ladvise speed: 2.02727
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.86451
Iter 9/10: OSS cache speed: 2.31444
Iter 9/10: ladvise speed: 2.41122
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.78826
Iter 10/10: OSS cache speed: 1.55585
Iter 10/10: ladvise speed: 1.98337
Average uncached read: 2.09
Average speedup with OSS cached read:  2.20 = +5%
Average speedup with ladvise willread:  2.19 = +4%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0