== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:44:41 (1733795081)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.56902 s, 40.8 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-ffff8800b6d27800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.7386
Iter 1/10: OSS cache speed: 2.48529
Iter 1/10: ladvise speed: 3.16662
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 3.03871
Iter 2/10: OSS cache speed: 3.1509
Iter 2/10: ladvise speed: 3.23635
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.73315
Iter 3/10: OSS cache speed: 3.25961
Iter 3/10: ladvise speed: 2.77386
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.90134
Iter 4/10: OSS cache speed: 3.09799
Iter 4/10: ladvise speed: 3.21751
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.77182
Iter 5/10: OSS cache speed: 2.93661
Iter 5/10: ladvise speed: 2.91934
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.74216
Iter 6/10: OSS cache speed: 3.0008
Iter 6/10: ladvise speed: 3.08636
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.72317
Iter 7/10: OSS cache speed: 2.91446
Iter 7/10: ladvise speed: 3.04832
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.88423
Iter 8/10: OSS cache speed: 3.12421
Iter 8/10: ladvise speed: 2.90267
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.85128
Iter 9/10: OSS cache speed: 3.24026
Iter 9/10: ladvise speed: 3.08333
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.83183
Iter 10/10: OSS cache speed: 3.1199
Iter 10/10: ladvise speed: 3.09249
Average uncached read: 2.82
Average speedup with OSS cached read:  3.03 = +7%
Average speedup with ladvise willread:  3.05 = +8%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0