== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:30:31 (1786354231)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.56177 s, 16.0 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-ffff8d8842e29800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.40199
Iter 1/10: OSS cache speed: 1.82133
Iter 1/10: ladvise speed: 1.4473
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.52664
Iter 2/10: OSS cache speed: 2.2449
Iter 2/10: ladvise speed: 1.80051
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.90033
Iter 3/10: OSS cache speed: 1.98652
Iter 3/10: ladvise speed: 2.02993
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.00522
Iter 4/10: OSS cache speed: 1.99928
Iter 4/10: ladvise speed: 2.11014
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.96484
Iter 5/10: OSS cache speed: 2.46114
Iter 5/10: ladvise speed: 2.44858
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.23205
Iter 6/10: OSS cache speed: 2.461
Iter 6/10: ladvise speed: 2.1511
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.99204
Iter 7/10: OSS cache speed: 2.08322
Iter 7/10: ladvise speed: 2.46616
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.37385
Iter 8/10: OSS cache speed: 2.55848
Iter 8/10: ladvise speed: 2.49122
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.3325
Iter 9/10: OSS cache speed: 2.30357
Iter 9/10: ladvise speed: 2.49069
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.42806
Iter 10/10: OSS cache speed: 2.43908
Iter 10/10: ladvise speed: 2.59935
Average uncached read: 2.01
Average speedup with OSS cached read:  2.23 = +10%
Average speedup with ladvise willread:  2.20 = +9%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0