== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:36:10 (1780335370)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.1047 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-ffff91b5452f0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.353753
Iter 1/10: OSS cache speed: 0.406531
Iter 1/10: ladvise speed: 0.485089
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.345893
Iter 2/10: OSS cache speed: 0.353789
Iter 2/10: ladvise speed: 0.428328
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.388583
Iter 3/10: OSS cache speed: 0.437334
Iter 3/10: ladvise speed: 0.366972
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.368516
Iter 4/10: OSS cache speed: 0.375851
Iter 4/10: ladvise speed: 0.392116
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.415079
Iter 5/10: OSS cache speed: 0.430274
Iter 5/10: ladvise speed: 0.377838
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.371951
Iter 6/10: OSS cache speed: 0.338856
Iter 6/10: ladvise speed: 0.410185
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.428085
Iter 7/10: OSS cache speed: 0.403494
Iter 7/10: ladvise speed: 0.416168
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.404694
Iter 8/10: OSS cache speed: 0.436463
Iter 8/10: ladvise speed: 0.389768
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.37145
Iter 9/10: OSS cache speed: 0.458444
Iter 9/10: ladvise speed: 0.386203
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.436102
Iter 10/10: OSS cache speed: 0.422369
Iter 10/10: ladvise speed: 0.424369
Average uncached read: .38
Average speedup with OSS cached read:  .40 = +5%
Average speedup with ladvise willread:  .40 = +5%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0