== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:59:01 (1788465541)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.1546 s, 7.4 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-ffffa0ec20ed0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.416437
Iter 1/10: OSS cache speed: 0.523472
Iter 1/10: ladvise speed: 0.564019
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.360697
Iter 2/10: OSS cache speed: 0.368945
Iter 2/10: ladvise speed: 0.443718
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.335319
Iter 3/10: OSS cache speed: 0.424644
Iter 3/10: ladvise speed: 0.470516
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.468233
Iter 4/10: OSS cache speed: 0.516073
Iter 4/10: ladvise speed: 0.496827
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.470218
Iter 5/10: OSS cache speed: 0.48339
Iter 5/10: ladvise speed: 0.495033
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.453192
Iter 6/10: OSS cache speed: 0.487092
Iter 6/10: ladvise speed: 0.519179
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.495117
Iter 7/10: OSS cache speed: 0.528478
Iter 7/10: ladvise speed: 0.550633
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.481212
Iter 8/10: OSS cache speed: 0.583316
Iter 8/10: ladvise speed: 0.607331
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.481552
Iter 9/10: OSS cache speed: 0.580418
Iter 9/10: ladvise speed: 0.582873
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.468119
Iter 10/10: OSS cache speed: 0.556988
Iter 10/10: ladvise speed: 0.538233
Average uncached read: .44
Average speedup with OSS cached read:  .50 = +13%
Average speedup with ladvise willread:  .52 = +18%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0