== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:17:19 (1763155039)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.4617 s, 12.4 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-ffff995048c88000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.460565
Iter 1/10: OSS cache speed: 0.466268
Iter 1/10: ladvise speed: 0.410296
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.410799
Iter 2/10: OSS cache speed: 0.41768
Iter 2/10: ladvise speed: 0.405482
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.402747
Iter 3/10: OSS cache speed: 0.376908
Iter 3/10: ladvise speed: 0.390581
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.36107
Iter 4/10: OSS cache speed: 0.396667
Iter 4/10: ladvise speed: 0.412469
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.430124
Iter 5/10: OSS cache speed: 0.459189
Iter 5/10: ladvise speed: 0.460592
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.460963
Iter 6/10: OSS cache speed: 0.455169
Iter 6/10: ladvise speed: 0.447367
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.439608
Iter 7/10: OSS cache speed: 0.43707
Iter 7/10: ladvise speed: 0.433343
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.462033
Iter 8/10: OSS cache speed: 0.464411
Iter 8/10: ladvise speed: 0.477335
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.490215
Iter 9/10: OSS cache speed: 0.420965
Iter 9/10: ladvise speed: 0.416443
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.460853
Iter 10/10: OSS cache speed: 0.457474
Iter 10/10: ladvise speed: 0.433608
Average uncached read: .43
Average speedup with OSS cached read:  .43 = +0%
Average speedup with ladvise willread:  .42 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0