== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:43:13 (1787442193)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.4115 s, 9.2 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-ffff929a91097000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.460662
Iter 1/10: OSS cache speed: 0.517919
Iter 1/10: ladvise speed: 0.526443
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.472453
Iter 2/10: OSS cache speed: 0.498603
Iter 2/10: ladvise speed: 0.488003
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.442092
Iter 3/10: OSS cache speed: 0.512486
Iter 3/10: ladvise speed: 0.534796
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.403471
Iter 4/10: OSS cache speed: 0.426114
Iter 4/10: ladvise speed: 0.466047
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.43497
Iter 5/10: OSS cache speed: 0.499031
Iter 5/10: ladvise speed: 0.467519
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.300624
Iter 6/10: OSS cache speed: 0.417858
Iter 6/10: ladvise speed: 0.474359
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.362735
Iter 7/10: OSS cache speed: 0.488565
Iter 7/10: ladvise speed: 0.463897
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.443074
Iter 8/10: OSS cache speed: 0.498789
Iter 8/10: ladvise speed: 0.499666
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.494108
Iter 9/10: OSS cache speed: 0.551914
Iter 9/10: ladvise speed: 0.526513
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.387225
Iter 10/10: OSS cache speed: 0.470474
Iter 10/10: ladvise speed: 0.594893
Average uncached read: .42
Average speedup with OSS cached read:  .48 = +14%
Average speedup with ladvise willread:  .50 = +19%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0