== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:26:30 (1741627590)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.28509 s, 45.9 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-ffff8800aad6f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.53254
Iter 1/10: OSS cache speed: 2.51701
Iter 1/10: ladvise speed: 2.4993
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.61168
Iter 2/10: OSS cache speed: 2.5965
Iter 2/10: ladvise speed: 2.36089
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.75136
Iter 3/10: OSS cache speed: 2.73895
Iter 3/10: ladvise speed: 2.75094
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.78148
Iter 4/10: OSS cache speed: 2.73545
Iter 4/10: ladvise speed: 2.3561
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.28459
Iter 5/10: OSS cache speed: 2.42413
Iter 5/10: ladvise speed: 2.37045
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.89786
Iter 6/10: OSS cache speed: 1.44119
Iter 6/10: ladvise speed: 1.4563
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.63337
Iter 7/10: OSS cache speed: 1.78573
Iter 7/10: ladvise speed: 1.95655
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.18052
Iter 8/10: OSS cache speed: 2.02072
Iter 8/10: ladvise speed: 2.4832
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.56894
Iter 9/10: OSS cache speed: 2.89354
Iter 9/10: ladvise speed: 2.80437
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.16462
Iter 10/10: OSS cache speed: 2.17976
Iter 10/10: ladvise speed: 2.67666
Average uncached read: 2.34
Average speedup with OSS cached read:  2.33 = +0%
Average speedup with ladvise willread:  2.37 = +1%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0