== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:03:38 (1769756618)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1206 s, 8.0 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-ffff9eeac61a0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.38636
Iter 1/10: OSS cache speed: 0.307498
Iter 1/10: ladvise speed: 0.319021
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.316841
Iter 2/10: OSS cache speed: 0.28788
Iter 2/10: ladvise speed: 0.323149
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.30903
Iter 3/10: OSS cache speed: 0.374872
Iter 3/10: ladvise speed: 0.426122
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.342886
Iter 4/10: OSS cache speed: 0.334777
Iter 4/10: ladvise speed: 0.312709
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.314155
Iter 5/10: OSS cache speed: 0.397428
Iter 5/10: ladvise speed: 0.393288
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.393219
Iter 6/10: OSS cache speed: 0.426439
Iter 6/10: ladvise speed: 0.445671
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.399683
Iter 7/10: OSS cache speed: 0.51809
Iter 7/10: ladvise speed: 0.492778
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.460256
Iter 8/10: OSS cache speed: 0.552828
Iter 8/10: ladvise speed: 0.47683
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.478965
Iter 9/10: OSS cache speed: 0.582954
Iter 9/10: ladvise speed: 0.561296
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.491062
Iter 10/10: OSS cache speed: 0.559217
Iter 10/10: ladvise speed: 0.631437
Average uncached read: .38
Average speedup with OSS cached read:  .43 = +13%
Average speedup with ladvise willread:  .43 = +13%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0