== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:09:36 (1782220176)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.97301 s, 10.5 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-ffff9abfc5fff800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.312917
Iter 1/10: OSS cache speed: 0.37318
Iter 1/10: ladvise speed: 0.350516
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.324645
Iter 2/10: OSS cache speed: 0.335272
Iter 2/10: ladvise speed: 0.452883
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.366022
Iter 3/10: OSS cache speed: 0.347075
Iter 3/10: ladvise speed: 0.407061
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.315678
Iter 4/10: OSS cache speed: 0.401325
Iter 4/10: ladvise speed: 0.370216
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.385188
Iter 5/10: OSS cache speed: 0.430989
Iter 5/10: ladvise speed: 0.386347
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.358103
Iter 6/10: OSS cache speed: 0.435297
Iter 6/10: ladvise speed: 0.431752
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.362905
Iter 7/10: OSS cache speed: 0.414417
Iter 7/10: ladvise speed: 0.425565
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.3448
Iter 8/10: OSS cache speed: 0.42192
Iter 8/10: ladvise speed: 0.420325
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.392031
Iter 9/10: OSS cache speed: 0.443042
Iter 9/10: ladvise speed: 0.451467
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.397327
Iter 10/10: OSS cache speed: 0.438724
Iter 10/10: ladvise speed: 0.404612
Average uncached read: .35
Average speedup with OSS cached read:  .40 = +14%
Average speedup with ladvise willread:  .41 = +17%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0