== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 08:22:12 (1788610932)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.4588 s, 7.3 MB/s
llite.lustre-ffff9b3712b78800.read_ahead_stats=clear
llite.lustre-ffff9b3712b78800.read_ahead_stats=
snapshot_time             1788610980.036541143 secs.nsecs
start_time                1788610953.700688256 secs.nsecs
elapsed_time              26.335852887 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          16 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=227768: Sat Sep  5 08:42:04 2026
  read: IOPS=4, BW=4616KiB/s (4726kB/s)(5120MiB/1135904msec)
    clat (msec): min=59, max=565, avg=221.28, stdev=70.77
     lat (msec): min=59, max=565, avg=221.28, stdev=70.77
    clat percentiles (msec):
     |  1.00th=[   88],  5.00th=[  115], 10.00th=[  134], 20.00th=[  161],
     | 30.00th=[  182], 40.00th=[  201], 50.00th=[  218], 60.00th=[  234],
     | 70.00th=[  253], 80.00th=[  275], 90.00th=[  313], 95.00th=[  347],
     | 99.00th=[  426], 99.50th=[  447], 99.90th=[  502], 99.95th=[  527],
     | 99.99th=[  567]
   bw (  KiB/s): min= 1903, max=12288, per=100.00%, avg=4632.74, stdev=1579.23, samples=2246
   iops        : min=    1, max=   12, avg= 3.82, stdev= 1.63, samples=2246
  lat (msec)   : 100=2.44%, 250=66.56%, 500=30.86%, 750=0.14%
  cpu          : usr=0.28%, sys=26.39%, ctx=37709, majf=5578, minf=1305410
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=4616KiB/s (4726kB/s), 4616KiB/s-4616KiB/s (4726kB/s-4726kB/s), io=5120MiB (5369MB), run=1135904-1135904msec