== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:59:19 (1742903959)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.45659 s, 42.7 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-ffff8800b5522800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.63497
Iter 1/10: OSS cache speed: 2.70177
Iter 1/10: ladvise speed: 2.63706
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.64971
Iter 2/10: OSS cache speed: 2.58335
Iter 2/10: ladvise speed: 2.76953
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.7938
Iter 3/10: OSS cache speed: 2.82116
Iter 3/10: ladvise speed: 2.71496
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.73187
Iter 4/10: OSS cache speed: 2.21996
Iter 4/10: ladvise speed: 2.53508
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.36067
Iter 5/10: OSS cache speed: 2.49518
Iter 5/10: ladvise speed: 2.17982
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.59557
Iter 6/10: OSS cache speed: 2.13969
Iter 6/10: ladvise speed: 1.87865
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.13327
Iter 7/10: OSS cache speed: 2.11
Iter 7/10: ladvise speed: 2.38708
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.68377
Iter 8/10: OSS cache speed: 2.60931
Iter 8/10: ladvise speed: 2.30256
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.61893
Iter 9/10: OSS cache speed: 2.8822
Iter 9/10: ladvise speed: 3.001
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.68387
Iter 10/10: OSS cache speed: 2.62828
Iter 10/10: ladvise speed: 2.60458
Average uncached read: 2.58
Average speedup with OSS cached read:  2.51 = +-2%
Average speedup with ladvise willread:  2.50 = +-3%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0