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Re: [Qemu-block] [PATCH v10 2/9] include: Add a lookup table of sizes
From: |
Alberto Garcia |
Subject: |
Re: [Qemu-block] [PATCH v10 2/9] include: Add a lookup table of sizes |
Date: |
Mon, 24 Sep 2018 15:58:23 +0200 |
User-agent: |
Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1 (i586-pc-linux-gnu) |
On Fri 21 Sep 2018 07:23:03 PM CEST, Leonid Bloch wrote:
> Adding a lookup table for the powers of two, with the appropriate size
> prefixes. This is needed when a size has to be stringified, in which
> case something like '(1 * KiB)' would become a literal '(1 * (1L << 10))'
> string. Powers of two are used very often for sizes, so such a table
> will also make it easier and more intuitive to write them.
>
> This table is generatred using the following AWK script:
>
> BEGIN {
> suffix="KMGTPE";
> for(i=10; i<64; i++) {
> val=2**i;
> s=substr(suffix, int(i/10), 1);
> n=2**(i%10);
> pad=21-int(log(n)/log(10));
> printf("#define S_%d%siB %*d\n", n, s, pad, val);
> }
> }
>
> Signed-off-by: Leonid Bloch <address@hidden>
Reviewed-by: Alberto Garcia <address@hidden>
Berto
[Qemu-block] [PATCH v10 3/9] qcow2: Make sizes more humanly readable, Leonid Bloch, 2018/09/21
[Qemu-block] [PATCH v10 2/9] include: Add a lookup table of sizes, Leonid Bloch, 2018/09/21
[Qemu-block] [PATCH v10 4/9] qcow2: Avoid duplication in setting the refcount cache size, Leonid Bloch, 2018/09/21
[Qemu-block] [PATCH v10 5/9] qcow2: Assign the L2 cache relatively to the image size, Leonid Bloch, 2018/09/21
[Qemu-block] [PATCH v10 6/9] qcow2: Increase the default upper limit on the L2 cache size, Leonid Bloch, 2018/09/21
[Qemu-block] [PATCH v10 7/9] qcow2: Resize the cache upon image resizing, Leonid Bloch, 2018/09/21
[Qemu-block] [PATCH v10 9/9] qcow2: Explicit number replaced by a constant, Leonid Bloch, 2018/09/21
[Qemu-block] [PATCH v10 8/9] qcow2: Set the default cache-clean-interval to 10 minutes, Leonid Bloch, 2018/09/21