== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:57:15 (1782532635)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.65173 s, 13.7 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-ffff99824374b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.579368
Iter 1/10: OSS cache speed: 0.618235
Iter 1/10: ladvise speed: 0.590647
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.595282
Iter 2/10: OSS cache speed: 0.648296
Iter 2/10: ladvise speed: 0.635192
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.631121
Iter 3/10: OSS cache speed: 0.679625
Iter 3/10: ladvise speed: 0.757204
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.969791
Iter 4/10: OSS cache speed: 0.971109
Iter 4/10: ladvise speed: 0.903666
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.855695
Iter 5/10: OSS cache speed: 0.990224
Iter 5/10: ladvise speed: 1.08244
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.43
Iter 6/10: OSS cache speed: 1.68653
Iter 6/10: ladvise speed: 1.15928
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.25299
Iter 7/10: OSS cache speed: 1.41133
Iter 7/10: ladvise speed: 1.31374
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.49785
Iter 8/10: OSS cache speed: 1.53549
Iter 8/10: ladvise speed: 1.65101
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.37838
Iter 9/10: OSS cache speed: 1.52381
Iter 9/10: ladvise speed: 1.67957
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.80458
Iter 10/10: OSS cache speed: 1.63838
Iter 10/10: ladvise speed: 1.73138
Average uncached read: 1.09
Average speedup with OSS cached read:  1.17 = +7%
Average speedup with ladvise willread:  1.15 = +5%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0