== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:00:25 (1782928825)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.89262 s, 17.8 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-ffff910783e9e000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.2317
Iter 1/10: OSS cache speed: 2.15745
Iter 1/10: ladvise speed: 2.32878
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.18048
Iter 2/10: OSS cache speed: 2.23112
Iter 2/10: ladvise speed: 2.34248
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.11623
Iter 3/10: OSS cache speed: 2.24137
Iter 3/10: ladvise speed: 2.30121
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.25864
Iter 4/10: OSS cache speed: 1.52535
Iter 4/10: ladvise speed: 0.783643
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.710413
Iter 5/10: OSS cache speed: 0.664259
Iter 5/10: ladvise speed: 0.985111
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.739633
Iter 6/10: OSS cache speed: 1.34344
Iter 6/10: ladvise speed: 1.42933
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.23937
Iter 7/10: OSS cache speed: 1.57008
Iter 7/10: ladvise speed: 1.84406
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.64613
Iter 8/10: OSS cache speed: 1.97272
Iter 8/10: ladvise speed: 1.65896
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.82828
Iter 9/10: OSS cache speed: 2.2957
Iter 9/10: ladvise speed: 2.2698
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.14089
Iter 10/10: OSS cache speed: 2.2341
Iter 10/10: ladvise speed: 2.37005
Average uncached read: 1.70
Average speedup with OSS cached read:  1.82 = +7%
Average speedup with ladvise willread:  1.83 = +7%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0