== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:17:41 (1708827461)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.22013 s, 47.2 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: 2.91104
Iter 1/10: OSS cache speed: 2.97362
Iter 1/10: ladvise speed: 1.42542
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.02051
Iter 2/10: OSS cache speed: 2.13245
Iter 2/10: ladvise speed: 2.11929
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.07406
Iter 3/10: OSS cache speed: 2.18673
Iter 3/10: ladvise speed: 3.05252
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.75247
Iter 4/10: OSS cache speed: 2.6465
Iter 4/10: ladvise speed: 2.58001
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.66984
Iter 5/10: OSS cache speed: 2.57876
Iter 5/10: ladvise speed: 2.45461
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.55933
Iter 6/10: OSS cache speed: 2.80956
Iter 6/10: ladvise speed: 2.70422
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.53474
Iter 7/10: OSS cache speed: 2.70257
Iter 7/10: ladvise speed: 2.71663
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.77403
Iter 8/10: OSS cache speed: 2.61808
Iter 8/10: ladvise speed: 2.72426
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.70635
Iter 9/10: OSS cache speed: 2.75193
Iter 9/10: ladvise speed: 2.82767
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.75518
Iter 10/10: OSS cache speed: 2.56697
Iter 10/10: ladvise speed: 2.66849
Average uncached read: 2.57
Average speedup with OSS cached read: 2.59 = +.77%
Average speedup with ladvise willread: 2.52 = +-1.94%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 24168:   < 20 : < 20 : syntax error: operand expected (error token is "< 20 ")
lfs ladvise: cannot give advice: Unknown error 524 (524)
ladvise: cannot give advice 'dontneed' to file '/mnt/lustre/f255a.sanity': Unknown error 524
osd-zfs does not support dontneed or drop_caches
fail_loc=0