== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:40:18 (1735364418)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.60045 s, 40.3 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-ffff8800b5fb9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.36756
Iter 1/10: OSS cache speed: 1.73198
Iter 1/10: ladvise speed: 1.55399
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.35997
Iter 2/10: OSS cache speed: 1.5472
Iter 2/10: ladvise speed: 1.5523
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.43074
Iter 3/10: OSS cache speed: 1.57166
Iter 3/10: ladvise speed: 1.58563
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.37447
Iter 4/10: OSS cache speed: 1.54588
Iter 4/10: ladvise speed: 1.57045
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.31999
Iter 5/10: OSS cache speed: 1.50733
Iter 5/10: ladvise speed: 1.5556
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.3278
Iter 6/10: OSS cache speed: 1.55394
Iter 6/10: ladvise speed: 1.56941
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.34957
Iter 7/10: OSS cache speed: 2.13316
Iter 7/10: ladvise speed: 1.70073
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.64321
Iter 8/10: OSS cache speed: 1.57516
Iter 8/10: ladvise speed: 1.57734
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.57425
Iter 9/10: OSS cache speed: 1.54183
Iter 9/10: ladvise speed: 1.56346
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.44188
Iter 10/10: OSS cache speed: 2.07263
Iter 10/10: ladvise speed: 1.65758
Average uncached read: 1.41
Average speedup with OSS cached read:  1.67 = +18%
Average speedup with ladvise willread:  1.58 = +12%
Speedup with OSS cached read less than 20%,  got 18%. Skipping ladvise willread check.
fail_loc=0