== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:51:16 (1747810276)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.66433 s, 39.4 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-ffff8800b62dd000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.95665
Iter 1/10: OSS cache speed: 3.34371
Iter 1/10: ladvise speed: 3.29546
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.95683
Iter 2/10: OSS cache speed: 3.2766
Iter 2/10: ladvise speed: 3.35411
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 3.00687
Iter 3/10: OSS cache speed: 3.2454
Iter 3/10: ladvise speed: 3.29989
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.90063
Iter 4/10: OSS cache speed: 3.3608
Iter 4/10: ladvise speed: 3.01693
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 3.01196
Iter 5/10: OSS cache speed: 3.3437
Iter 5/10: ladvise speed: 3.19442
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 3.10145
Iter 6/10: OSS cache speed: 3.39088
Iter 6/10: ladvise speed: 3.33919
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.84617
Iter 7/10: OSS cache speed: 3.19512
Iter 7/10: ladvise speed: 3.24096
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.9433
Iter 8/10: OSS cache speed: 3.12402
Iter 8/10: ladvise speed: 2.94274
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.70575
Iter 9/10: OSS cache speed: 3.16928
Iter 9/10: ladvise speed: 2.45264
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.25659
Iter 10/10: OSS cache speed: 2.37946
Iter 10/10: ladvise speed: 2.11033
Average uncached read: 2.86
Average speedup with OSS cached read:  3.18 = +11%
Average speedup with ladvise willread:  3.02 = +5%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0