== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:47:56 (1782866876)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.00566 s, 17.5 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-ffff9cc80b32a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.2542
Iter 1/10: OSS cache speed: 2.33383
Iter 1/10: ladvise speed: 2.44812
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.16948
Iter 2/10: OSS cache speed: 2.38624
Iter 2/10: ladvise speed: 2.44229
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.26709
Iter 3/10: OSS cache speed: 2.44886
Iter 3/10: ladvise speed: 2.45128
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.19863
Iter 4/10: OSS cache speed: 2.25822
Iter 4/10: ladvise speed: 2.40381
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.97959
Iter 5/10: OSS cache speed: 2.11841
Iter 5/10: ladvise speed: 2.44419
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.65232
Iter 6/10: OSS cache speed: 2.25706
Iter 6/10: ladvise speed: 2.21883
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.30035
Iter 7/10: OSS cache speed: 2.28602
Iter 7/10: ladvise speed: 2.25661
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.07053
Iter 8/10: OSS cache speed: 1.71339
Iter 8/10: ladvise speed: 1.69637
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.44666
Iter 9/10: OSS cache speed: 1.86525
Iter 9/10: ladvise speed: 1.76854
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.79433
Iter 10/10: OSS cache speed: 2.41297
Iter 10/10: ladvise speed: 2.5297
Average uncached read: 2.01
Average speedup with OSS cached read:  2.20 = +9%
Average speedup with ladvise willread:  2.26 = +12%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0