== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:18:12 (1708827492)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.64416 s, 39.7 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
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 3.16048
Iter 1/10: OSS cache speed: 2.66434
Iter 1/10: ladvise speed: 3.17207
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.72875
Iter 2/10: OSS cache speed: 2.91597
Iter 2/10: ladvise speed: 3.36941
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.84641
Iter 3/10: OSS cache speed: 3.18091
Iter 3/10: ladvise speed: 2.87028
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 3.21386
Iter 4/10: OSS cache speed: 3.35259
Iter 4/10: ladvise speed: 3.69954
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.91905
Iter 5/10: OSS cache speed: 3.33808
Iter 5/10: ladvise speed: 3.40009
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.91681
Iter 6/10: OSS cache speed: 3.60859
Iter 6/10: ladvise speed: 3.50262
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 3.40712
Iter 7/10: OSS cache speed: 3.38084
Iter 7/10: ladvise speed: 3.15981
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.86268
Iter 8/10: OSS cache speed: 3.33419
Iter 8/10: ladvise speed: 3.30311
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 3.06344
Iter 9/10: OSS cache speed: 3.41126
Iter 9/10: ladvise speed: 3.41496
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.8339
Iter 10/10: OSS cache speed: 3.62316
Iter 10/10: ladvise speed: 3.32366
Average uncached read: 2.99
Average speedup with OSS cached read: 3.28 = +9.69%
Average speedup with ladvise willread: 3.32 = +11.03%
Speedup with OSS cached read less than 20%, got 9.69%. Skipping ladvise willread check.
fail_loc=0