== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:43:31 (1788749011)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.3954 s, 10.1 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-ffff899608ae8800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.46128
Iter 1/10: OSS cache speed: 0.48352
Iter 1/10: ladvise speed: 0.520987
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.552884
Iter 2/10: OSS cache speed: 0.538185
Iter 2/10: ladvise speed: 0.505365
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.541984
Iter 3/10: OSS cache speed: 0.33514
Iter 3/10: ladvise speed: 0.459079
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.464689
Iter 4/10: OSS cache speed: 0.412605
Iter 4/10: ladvise speed: 0.435624
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.447047
Iter 5/10: OSS cache speed: 0.416291
Iter 5/10: ladvise speed: 0.461821
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.433645
Iter 6/10: OSS cache speed: 0.450574
Iter 6/10: ladvise speed: 0.443984
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.467267
Iter 7/10: OSS cache speed: 0.45747
Iter 7/10: ladvise speed: 0.388432
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.405084
Iter 8/10: OSS cache speed: 0.450107
Iter 8/10: ladvise speed: 0.460837
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.426736
Iter 9/10: OSS cache speed: 0.355986
Iter 9/10: ladvise speed: 0.428829
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.470615
Iter 10/10: OSS cache speed: 0.438942
Iter 10/10: ladvise speed: 0.449292
Average uncached read: .46
Average speedup with OSS cached read:  .43 = +-6%
Average speedup with ladvise willread:  .45 = +-2%
Speedup with OSS cached read less than 20%,  got -6%. Skipping ladvise willread check.
fail_loc=0