== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:49:16 (1788842956)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.6672 s, 9.8 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-ffff99330886b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.414285
Iter 1/10: OSS cache speed: 0.439583
Iter 1/10: ladvise speed: 0.417872
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.492055
Iter 2/10: OSS cache speed: 0.402792
Iter 2/10: ladvise speed: 0.491048
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.442465
Iter 3/10: OSS cache speed: 0.489999
Iter 3/10: ladvise speed: 0.423992
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.512462
Iter 4/10: OSS cache speed: 0.493874
Iter 4/10: ladvise speed: 0.481894
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.494553
Iter 5/10: OSS cache speed: 0.503932
Iter 5/10: ladvise speed: 0.473978
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.500751
Iter 6/10: OSS cache speed: 0.506709
Iter 6/10: ladvise speed: 0.512493
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.449398
Iter 7/10: OSS cache speed: 0.486239
Iter 7/10: ladvise speed: 0.456467
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.491368
Iter 8/10: OSS cache speed: 0.413548
Iter 8/10: ladvise speed: 0.463881
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.468312
Iter 9/10: OSS cache speed: 0.504914
Iter 9/10: ladvise speed: 0.469045
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.47728
Iter 10/10: OSS cache speed: 0.483644
Iter 10/10: ladvise speed: 0.470677
Average uncached read: .47
Average speedup with OSS cached read:  .47 = +0%
Average speedup with ladvise willread:  .46 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0