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7090324: gclog rotation via external tool

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GC log rotation can be set via java command line, but customer sometime need to sync with OS level rotation setting.

Reviewed-by: sla, minqi, ehelin
This commit is contained in:
Yasumasa Suenaga 2014-03-28 21:04:37 -07:00 • committed by Yumin Qi
parent 0b0fdb97ce
commit 57d7e49ab1
9 changed files with 159 additions and 22 deletions
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18
hotspot/src/share/vm/runtime/arguments.cpp
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@ -1907,24 +1907,22 @@ static bool verify_serial_gc_flags() {
// check if do gclog rotation
// +UseGCLogFileRotation is a must,
// no gc log rotation when log file not supplied or
// NumberOfGCLogFiles is 0, or GCLogFileSize is 0
// NumberOfGCLogFiles is 0
void check_gclog_consistency() {
if (UseGCLogFileRotation) {
if ((Arguments::gc_log_filename() == NULL) ||
(NumberOfGCLogFiles == 0) ||
(GCLogFileSize == 0)) {
if ((Arguments::gc_log_filename() == NULL) || (NumberOfGCLogFiles == 0)) {
jio_fprintf(defaultStream::output_stream(),
"To enable GC log rotation, use -Xloggc:<filename> -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=<num_of_files> -XX:GCLogFileSize=<num_of_size>[k|K|m|M|g|G]\n"
"where num_of_file > 0 and num_of_size > 0\n"
"To enable GC log rotation, use -Xloggc:<filename> -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=<num_of_files>\n"
"where num_of_file > 0\n"
"GC log rotation is turned off\n");
UseGCLogFileRotation = false;
}
}
if (UseGCLogFileRotation && GCLogFileSize < 8*K) {
FLAG_SET_CMDLINE(uintx, GCLogFileSize, 8*K);
jio_fprintf(defaultStream::output_stream(),
"GCLogFileSize changed to minimum 8K\n");
if (UseGCLogFileRotation && (GCLogFileSize != 0) && (GCLogFileSize < 8*K)) {
FLAG_SET_CMDLINE(uintx, GCLogFileSize, 8*K);
jio_fprintf(defaultStream::output_stream(),
"GCLogFileSize changed to minimum 8K\n");
}
}