== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:34:02 (1780338842)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.7958 s, 8.2 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-ffff911d82ab6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.318708
Iter 1/10: OSS cache speed: 0.338161
Iter 1/10: ladvise speed: 0.329952
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.333746
Iter 2/10: OSS cache speed: 0.372846
Iter 2/10: ladvise speed: 0.320687
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.346273
Iter 3/10: OSS cache speed: 0.347256
Iter 3/10: ladvise speed: 0.302353
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.287577
Iter 4/10: OSS cache speed: 0.353069
Iter 4/10: ladvise speed: 0.339193
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.304322
Iter 5/10: OSS cache speed: 0.351843
Iter 5/10: ladvise speed: 0.270523
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.332377
Iter 6/10: OSS cache speed: 0.308341
Iter 6/10: ladvise speed: 0.303281
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.270828
Iter 7/10: OSS cache speed: 0.274384
Iter 7/10: ladvise speed: 0.255806
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.316387
Iter 8/10: OSS cache speed: 0.28064
Iter 8/10: ladvise speed: 0.295908
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.326496
Iter 9/10: OSS cache speed: 0.322615
Iter 9/10: ladvise speed: 0.348049
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.317919
Iter 10/10: OSS cache speed: 0.292315
Iter 10/10: ladvise speed: 0.315963
Average uncached read: .31
Average speedup with OSS cached read:  .32 = +3%
Average speedup with ladvise willread:  .30 = +-3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0