== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:16:00 (1790972160)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.74773 s, 18.2 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-ffff955e43533000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.06725
Iter 1/10: OSS cache speed: 1.13003
Iter 1/10: ladvise speed: 1.48945
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.06615
Iter 2/10: OSS cache speed: 1.06696
Iter 2/10: ladvise speed: 1.10533
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.15736
Iter 3/10: OSS cache speed: 1.08177
Iter 3/10: ladvise speed: 1.12152
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.17678
Iter 4/10: OSS cache speed: 1.12677
Iter 4/10: ladvise speed: 1.07184
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.16672
Iter 5/10: OSS cache speed: 1.06968
Iter 5/10: ladvise speed: 1.23294
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.13682
Iter 6/10: OSS cache speed: 1.16439
Iter 6/10: ladvise speed: 1.12442
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.11583
Iter 7/10: OSS cache speed: 1.17975
Iter 7/10: ladvise speed: 1.17923
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.18161
Iter 8/10: OSS cache speed: 1.19981
Iter 8/10: ladvise speed: 1.1866
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.30319
Iter 9/10: OSS cache speed: 1.22435
Iter 9/10: ladvise speed: 1.16707
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.17108
Iter 10/10: OSS cache speed: 1.17747
Iter 10/10: ladvise speed: 1.17176
Average uncached read: 1.15
Average speedup with OSS cached read:  1.14 = +0%
Average speedup with ladvise willread:  1.18 = +2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0