== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:07:31 (1775833651)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.0794 s, 20.6 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-ffff8b7ec5756000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.93242
Iter 1/10: OSS cache speed: 1.65208
Iter 1/10: ladvise speed: 1.89881
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.96802
Iter 2/10: OSS cache speed: 1.99177
Iter 2/10: ladvise speed: 2.16094
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.20378
Iter 3/10: OSS cache speed: 2.20794
Iter 3/10: ladvise speed: 2.05603
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.08006
Iter 4/10: OSS cache speed: 2.27002
Iter 4/10: ladvise speed: 2.03479
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.05241
Iter 5/10: OSS cache speed: 2.02832
Iter 5/10: ladvise speed: 2.09161
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.09221
Iter 6/10: OSS cache speed: 2.07257
Iter 6/10: ladvise speed: 2.02703
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.20535
Iter 7/10: OSS cache speed: 2.25169
Iter 7/10: ladvise speed: 2.10732
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.13284
Iter 8/10: OSS cache speed: 2.08855
Iter 8/10: ladvise speed: 2.19186
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.16861
Iter 9/10: OSS cache speed: 2.13498
Iter 9/10: ladvise speed: 2.13065
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.07614
Iter 10/10: OSS cache speed: 2.12229
Iter 10/10: ladvise speed: 2.00066
Average uncached read: 2.09
Average speedup with OSS cached read:  2.08 = +0%
Average speedup with ladvise willread:  2.06 = +-1%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0