== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:46:36 (1787827596)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.5607 s, 7.2 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-ffff95d702c1a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.352299
Iter 1/10: OSS cache speed: 0.420563
Iter 1/10: ladvise speed: 0.418698
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.352309
Iter 2/10: OSS cache speed: 0.324191
Iter 2/10: ladvise speed: 0.461613
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.393049
Iter 3/10: OSS cache speed: 0.490632
Iter 3/10: ladvise speed: 0.375905
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.402084
Iter 4/10: OSS cache speed: 0.395084
Iter 4/10: ladvise speed: 0.351592
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.345965
Iter 5/10: OSS cache speed: 0.414096
Iter 5/10: ladvise speed: 0.326569
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.397969
Iter 6/10: OSS cache speed: 0.373468
Iter 6/10: ladvise speed: 0.386255
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.316297
Iter 7/10: OSS cache speed: 0.38164
Iter 7/10: ladvise speed: 0.385076
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.393962
Iter 8/10: OSS cache speed: 0.410105
Iter 8/10: ladvise speed: 0.400963
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.389109
Iter 9/10: OSS cache speed: 0.45493
Iter 9/10: ladvise speed: 0.452368
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.391469
Iter 10/10: OSS cache speed: 0.385585
Iter 10/10: ladvise speed: 0.513013
Average uncached read: .37
Average speedup with OSS cached read:  .40 = +8%
Average speedup with ladvise willread:  .40 = +8%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0