== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:16:39 (1783955799)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.9024 s, 7.0 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-ffff8f2b0b653000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.2922
Iter 1/10: OSS cache speed: 0.282866
Iter 1/10: ladvise speed: 0.337062
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.406178
Iter 2/10: OSS cache speed: 0.299033
Iter 2/10: ladvise speed: 0.301191
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.297644
Iter 3/10: OSS cache speed: 0.305471
Iter 3/10: ladvise speed: 0.338072
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.302383
Iter 4/10: OSS cache speed: 0.343082
Iter 4/10: ladvise speed: 0.298492
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.382593
Iter 5/10: OSS cache speed: 0.289335
Iter 5/10: ladvise speed: 0.343247
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.385449
Iter 6/10: OSS cache speed: 0.375536
Iter 6/10: ladvise speed: 0.339603
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.357747
Iter 7/10: OSS cache speed: 0.352676
Iter 7/10: ladvise speed: 0.395399
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.343748
Iter 8/10: OSS cache speed: 0.368895
Iter 8/10: ladvise speed: 0.344232
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.36292
Iter 9/10: OSS cache speed: 0.392122
Iter 9/10: ladvise speed: 0.390064
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.358849
Iter 10/10: OSS cache speed: 0.364105
Iter 10/10: ladvise speed: 0.377788
Average uncached read: .34
Average speedup with OSS cached read:  .33 = +-2%
Average speedup with ladvise willread:  .34 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0