== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 23:26:34 (1763353594)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.05452 s, 14.9 MB/s
llite.lustre-ffff89deb8b06000.read_ahead_stats=clear
llite.lustre-ffff89deb8b06000.read_ahead_stats=
snapshot_time             1763353612.257736386 secs.nsecs
start_time                1763353604.173124672 secs.nsecs
elapsed_time              8.084611714 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          4 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=227342: Sun Nov 16 23:32:49 2025
  read: IOPS=14, BW=14.5MiB/s (15.2MB/s)(5120MiB/354173msec)
    clat (msec): min=32, max=216, avg=68.99, stdev=30.68
     lat (msec): min=32, max=216, avg=68.99, stdev=30.68
    clat percentiles (msec):
     |  1.00th=[   42],  5.00th=[   46], 10.00th=[   47], 20.00th=[   50],
     | 30.00th=[   52], 40.00th=[   54], 50.00th=[   55], 60.00th=[   58],
     | 70.00th=[   63], 80.00th=[  105], 90.00th=[  114], 95.00th=[  125],
     | 99.00th=[  180], 99.50th=[  184], 99.90th=[  197], 99.95th=[  205],
     | 99.99th=[  218]
   bw (  KiB/s): min= 4087, max=24576, per=100.00%, avg=14844.83, stdev=5455.85, samples=706
   iops        : min=    3, max=   24, avg=14.45, stdev= 5.34, samples=706
  lat (msec)   : 50=22.85%, 100=55.18%, 250=21.97%
  cpu          : usr=0.71%, sys=86.36%, ctx=13439, majf=5146, minf=1305843
  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=14.5MiB/s (15.2MB/s), 14.5MiB/s-14.5MiB/s (15.2MB/s-15.2MB/s), io=5120MiB (5369MB), run=354173-354173msec