== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:26:44 (1787102804)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.33214 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-ffff8ec4e0f25800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.70863
Iter 1/10: OSS cache speed: 1.81568
Iter 1/10: ladvise speed: 2.16161
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.88367
Iter 2/10: OSS cache speed: 2.18759
Iter 2/10: ladvise speed: 2.18241
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.1498
Iter 3/10: OSS cache speed: 2.3922
Iter 3/10: ladvise speed: 2.27811
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.27442
Iter 4/10: OSS cache speed: 2.32385
Iter 4/10: ladvise speed: 2.54305
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.24303
Iter 5/10: OSS cache speed: 2.54667
Iter 5/10: ladvise speed: 2.32615
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.14536
Iter 6/10: OSS cache speed: 2.39738
Iter 6/10: ladvise speed: 1.62197
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.678871
Iter 7/10: OSS cache speed: 0.740006
Iter 7/10: ladvise speed: 0.798168
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.688554
Iter 8/10: OSS cache speed: 0.855888
Iter 8/10: ladvise speed: 0.758678
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.675855
Iter 9/10: OSS cache speed: 0.749919
Iter 9/10: ladvise speed: 0.811014
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.669204
Iter 10/10: OSS cache speed: 0.736456
Iter 10/10: ladvise speed: 0.801454
Average uncached read: 1.51
Average speedup with OSS cached read:  1.67 = +10%
Average speedup with ladvise willread:  1.62 = +7%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0