== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:08:32 (1753366112)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.03148 s, 14.9 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-ffff88c0c65dd800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.22657
Iter 1/10: OSS cache speed: 1.72358
Iter 1/10: ladvise speed: 1.81885
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.00233
Iter 2/10: OSS cache speed: 2.0929
Iter 2/10: ladvise speed: 2.32134
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.02315
Iter 3/10: OSS cache speed: 2.4343
Iter 3/10: ladvise speed: 0.538502
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.762147
Iter 4/10: OSS cache speed: 1.05825
Iter 4/10: ladvise speed: 1.60336
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.5603
Iter 5/10: OSS cache speed: 1.63538
Iter 5/10: ladvise speed: 2.01489
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.67124
Iter 6/10: OSS cache speed: 1.95894
Iter 6/10: ladvise speed: 2.06639
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.9176
Iter 7/10: OSS cache speed: 2.35213
Iter 7/10: ladvise speed: 2.39224
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.12802
Iter 8/10: OSS cache speed: 2.49726
Iter 8/10: ladvise speed: 2.33488
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.10829
Iter 9/10: OSS cache speed: 1.38044
Iter 9/10: ladvise speed: 1.67235
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.74052
Iter 10/10: OSS cache speed: 1.9868
Iter 10/10: ladvise speed: 2.05704
Average uncached read: 1.71
Average speedup with OSS cached read:  1.91 = +11%
Average speedup with ladvise willread:  1.88 = +9%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0