== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:54:41 (1774889681)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.65397 s, 13.7 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-ffff92b8d80f0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.565248
Iter 1/10: OSS cache speed: 0.552132
Iter 1/10: ladvise speed: 0.557742
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.574258
Iter 2/10: OSS cache speed: 0.533285
Iter 2/10: ladvise speed: 0.552298
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.616729
Iter 3/10: OSS cache speed: 0.588597
Iter 3/10: ladvise speed: 0.673421
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.656873
Iter 4/10: OSS cache speed: 0.682953
Iter 4/10: ladvise speed: 0.745619
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.939528
Iter 5/10: OSS cache speed: 1.05607
Iter 5/10: ladvise speed: 0.892012
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.881322
Iter 6/10: OSS cache speed: 1.00033
Iter 6/10: ladvise speed: 0.941591
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.13388
Iter 7/10: OSS cache speed: 1.17086
Iter 7/10: ladvise speed: 1.07001
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.12873
Iter 8/10: OSS cache speed: 1.13948
Iter 8/10: ladvise speed: 1.30936
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.27582
Iter 9/10: OSS cache speed: 1.46141
Iter 9/10: ladvise speed: 1.33385
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.28694
Iter 10/10: OSS cache speed: 1.31633
Iter 10/10: ladvise speed: 1.35939
Average uncached read: .90
Average speedup with OSS cached read:  .95 = +5%
Average speedup with ladvise willread:  .94 = +4%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0