== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:19:23 (1744085963)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.31219 s, 45.3 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-ffff8800b5956000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.1533
Iter 1/10: OSS cache speed: 1.78969
Iter 1/10: ladvise speed: 1.94107
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.88879
Iter 2/10: OSS cache speed: 2.16766
Iter 2/10: ladvise speed: 1.80354
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.76528
Iter 3/10: OSS cache speed: 2.15477
Iter 3/10: ladvise speed: 2.90302
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.9338
Iter 4/10: OSS cache speed: 2.80196
Iter 4/10: ladvise speed: 2.61604
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.95922
Iter 5/10: OSS cache speed: 2.85111
Iter 5/10: ladvise speed: 2.93044
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.68306
Iter 6/10: OSS cache speed: 1.45551
Iter 6/10: ladvise speed: 2.18663
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.90907
Iter 7/10: OSS cache speed: 1.7785
Iter 7/10: ladvise speed: 1.75802
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.48427
Iter 8/10: OSS cache speed: 1.75526
Iter 8/10: ladvise speed: 1.53492
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.16941
Iter 9/10: OSS cache speed: 2.48548
Iter 9/10: ladvise speed: 1.938
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.02719
Iter 10/10: OSS cache speed: 1.62309
Iter 10/10: ladvise speed: 1.51532
Average uncached read: 2.09
Average speedup with OSS cached read:  2.08 = +0%
Average speedup with ladvise willread:  2.11 = +0%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0