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AP_Logger: try harder to use close to user buffer size

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this stops us drastically reducing buffer size when low on memory
This commit is contained in:
Andrew Tridgell 2019-09-23 11:48:16 +10:00
parent 3105255080
commit 609a2d95f8
1 changed files with 6 additions and 2 deletions
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8
libraries/AP_Logger/AP_Logger_File.cpp
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@ -83,10 +83,14 @@ void AP_Logger_File::Init()
} }
bufsize *= 1024; bufsize *= 1024;
const uint32_t desired_bufsize = bufsize;
// If we can't allocate the full size, try to reduce it until we can allocate it // If we can't allocate the full size, try to reduce it until we can allocate it
while (!_writebuf.set_size(bufsize) && bufsize >= _writebuf_chunk) { while (!_writebuf.set_size(bufsize) && bufsize >= _writebuf_chunk) {
hal.console->printf("AP_Logger_File: Couldn't set buffer size to=%u\n", (unsigned)bufsize); bufsize *= 0.9;
bufsize >>= 1; }
if (bufsize >= _writebuf_chunk && bufsize != desired_bufsize) {
hal.console->printf("AP_Logger: reduced buffer %u/%u\n", (unsigned)bufsize, (unsigned)desired_bufsize);
} }
if (!_writebuf.get_size()) { if (!_writebuf.get_size()) {