== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:31:52 (1779975112)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.1695 s, 9.4 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-ffff97a6d1332800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.38106
Iter 1/10: OSS cache speed: 0.351718
Iter 1/10: ladvise speed: 0.292797
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.284691
Iter 2/10: OSS cache speed: 0.356968
Iter 2/10: ladvise speed: 0.370226
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.355036
Iter 3/10: OSS cache speed: 0.32551
Iter 3/10: ladvise speed: 0.350022
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.344252
Iter 4/10: OSS cache speed: 0.347318
Iter 4/10: ladvise speed: 0.341931
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.279148
Iter 5/10: OSS cache speed: 0.367681
Iter 5/10: ladvise speed: 0.328319
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.357073
Iter 6/10: OSS cache speed: 0.389188
Iter 6/10: ladvise speed: 0.330119
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.36922
Iter 7/10: OSS cache speed: 0.411435
Iter 7/10: ladvise speed: 0.396433
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.446776
Iter 8/10: OSS cache speed: 0.320385
Iter 8/10: ladvise speed: 0.349479
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.348144
Iter 9/10: OSS cache speed: 0.331078
Iter 9/10: ladvise speed: 0.363017
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.300457
Iter 10/10: OSS cache speed: 0.340735
Iter 10/10: ladvise speed: 0.315267
Average uncached read: .34
Average speedup with OSS cached read:  .35 = +2%
Average speedup with ladvise willread:  .34 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0