== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:17:46 (1738480666)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.24322 s, 46.7 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-ffff8800b6cc7000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.88482
Iter 1/10: OSS cache speed: 2.04519
Iter 1/10: ladvise speed: 1.48916
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.88937
Iter 2/10: OSS cache speed: 2.0956
Iter 2/10: ladvise speed: 1.77863
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.56199
Iter 3/10: OSS cache speed: 1.76524
Iter 3/10: ladvise speed: 1.44563
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.42971
Iter 4/10: OSS cache speed: 1.50532
Iter 4/10: ladvise speed: 2.31638
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.71387
Iter 5/10: OSS cache speed: 2.86966
Iter 5/10: ladvise speed: 2.93264
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.97907
Iter 6/10: OSS cache speed: 1.76903
Iter 6/10: ladvise speed: 1.98078
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.61797
Iter 7/10: OSS cache speed: 1.37451
Iter 7/10: ladvise speed: 1.49292
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.64397
Iter 8/10: OSS cache speed: 1.56225
Iter 8/10: ladvise speed: 1.45942
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.53545
Iter 9/10: OSS cache speed: 1.64197
Iter 9/10: ladvise speed: 1.90218
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.51742
Iter 10/10: OSS cache speed: 1.60185
Iter 10/10: ladvise speed: 1.52446
Average uncached read: 1.87
Average speedup with OSS cached read:  1.82 = +-2%
Average speedup with ladvise willread:  1.83 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0