== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:19:44 (1789381184)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4724 s, 8.4 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-ffff8fcfd8b89000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.409661
Iter 1/10: OSS cache speed: 0.411874
Iter 1/10: ladvise speed: 0.437536
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.39397
Iter 2/10: OSS cache speed: 0.363265
Iter 2/10: ladvise speed: 0.392206
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.391253
Iter 3/10: OSS cache speed: 0.385836
Iter 3/10: ladvise speed: 0.325453
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.433585
Iter 4/10: OSS cache speed: 0.46708
Iter 4/10: ladvise speed: 0.361321
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.429327
Iter 5/10: OSS cache speed: 0.363912
Iter 5/10: ladvise speed: 0.36805
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.325194
Iter 6/10: OSS cache speed: 0.403494
Iter 6/10: ladvise speed: 0.378762
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.501396
Iter 7/10: OSS cache speed: 0.483944
Iter 7/10: ladvise speed: 0.40327
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.383986
Iter 8/10: OSS cache speed: 0.373262
Iter 8/10: ladvise speed: 0.389589
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.382057
Iter 9/10: OSS cache speed: 0.37097
Iter 9/10: ladvise speed: 0.37711
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.337275
Iter 10/10: OSS cache speed: 0.418165
Iter 10/10: ladvise speed: 0.41826
Average uncached read: .39
Average speedup with OSS cached read:  .40 = +2%
Average speedup with ladvise willread:  .38 = +-2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0