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authorBjörn Gustavsson <[email protected]>2017-10-13 13:28:25 +0200
committerBjörn Gustavsson <[email protected]>2017-10-18 14:05:00 +0200
commit360d26b21c169b0c88d6ca43265cbcfa3ce9ef74 (patch)
tree7476c8aaed61a5f788f635c2d46807df72bab6cc /erts/include
parentb73c4d012e122547c896f64d92ef9af3e531433e (diff)
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Buffer writing of crash dumps
Writing of crash dumps were done using unbuffered IO. This is slow since many small writes are done. Use a FILE* with an allocated buffer to obtain buffered IO. I wrote a small test program that created 50000 binaries of 200 bytes each and then created a crash dump. The crash dumping was an order of magnitude faster with buffered IO than without.
Diffstat (limited to 'erts/include')
-rw-r--r--erts/include/internal/erl_printf.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/erts/include/internal/erl_printf.h b/erts/include/internal/erl_printf.h
index f180a53f18..7e9807f6a8 100644
--- a/erts/include/internal/erl_printf.h
+++ b/erts/include/internal/erl_printf.h
@@ -44,6 +44,7 @@ struct erts_dsprintf_buf_t_ {
typedef int (*fmtfn_t)(void*, char*, size_t);
int erts_write_fd(void *vfdp, char* buf, size_t len);
+int erts_write_fp(void *vfdp, char* buf, size_t len);
int erts_write_ds(void *vdsbufp, char* buf, size_t len);
int erts_printf(const char *, ...);